TenGo/TenGo-features-problems

Sub-page of TenGo

tderz:

  • I appreciate TenGo very much and feel sorry for others when I read that it it seems not available anymore. It has a nice graphic. I use TenGo because I did not get PalmGo? and PalmSGF to work on the Tungsten (it worked on a previous Sony Clie).

However, I got several fatal alerts /Fatal Alerts on a Tungsten T5 (not a big issue with the flash memory of the T5) when having TenGo in use. I do not know whether these crashes stem from the PDA (Tungsten) itself or the program.

Suggestions: important features missing:

  • to swap SGF branches, e.g. making branch (b) branch (a) of the SGF and therewith part of the main game line. This is important, when e.g. playing a slow online game on DGS and analyzing an expected move, only to realize later that the opponent plays somewhere completely else. If this happens several times in succession, the actual main line game is deeply hidden in branches.
    • a makeshift solution could be to always let start TenGo in the last game position. It actually does this, when you switch off the PDA, but it does not do this, when you open another game and then return to this game.
  • inserting moves: when replaying/recording an own game of oneself, only to realize at the end that there was another exchange A-B made quite early. Than you do not want to enter all the moves again, rather just insert the missing moves. (Of course that's difficult with the few available buttons, but perhaps a 2nd menu?)
  • allow special characters: letters and some special signs.
  • a PASS move is at present only available in what the program thinks what the main line would be. A PASS move is useful to demonstrate the local aji after a tenuki. As long as it's not available, I write 'PASS' in the comments field and put a stone in one of the empty fields a1, a19,t1 or t19.
  • the editing commands of the PDA 'copy', 'cut' and 'paste' are at present not available when writing in the 'comments'- or 'game info'-field.

Questions: How to create a 9x9, 13x13 board?
Is there any manual?
What does/should "tengoconvert.exe" do?

If I, you, someone experiences problems with finding SGFs on the Palm: ´´"I cannot read any SGF though, even when they are either on the memory card, nor on internal: TenGo does not see them, the SGF (plain on internal memory or memory card level), nor any other self-created folder structure. What is going on here?"´´
.... then it might be useful to delete the demo version first!

The commercial version does not come with a sample SGF (as in the demo version).

Problems/Bugs: 1-i) When having around 4000 numbered games from Go4Go.net in a folder, TenGo finds with its "open folder/games" function only the first about 2000 games (until "1904.sgf"). I say about, because they are displayed in the order

  • 889.sgf,
  • 89.sgf,
  • 890.sgf,
  • 891.sgf etc.

Those files are on the PDA. When finding e.g. file 4000.sgf via the files application of the PDA, the "Open with" function results in "Cannot open file 4000.sgf. No application knows how to open this file". I have only small understanding of computers & software, but assume that TenGo could tell the PDA in some kind of registry that it would like to read all files of the *.sgf-type.

1-ii) I stored the files in a folder in "Internal Memory" ("Internal Mem." i.e. not on the "Memory card" ("Mem. Card").
TenGo however lists no files from internal, but pretends that they all would have been stored on the Card ("Mem. Card").
That seems to be a bug and perhaps TenGo prefers files to be stored on the "Mem. Card".
The absence of a manual is a pity.

1-iii) In this respect PalmGoC? has a much nicer search function for all games of a certain player A and against all other or another certain player B, and all games of a certain tournament etc..

2) I find TenGo difficult in situations where the SGF has many branched variations. It is difficult to return to the main line. (1) go back as many moves until a left arrow appears, 2) press it and you got one line nearer to the main line, 3) are you at the main line? find out by remembering the game, if not re-iterate 1-3 until you are sure).
It is difficult even to know where the main line is, what the main line is. [10], [20]
HardKeys can be programmed with

  • Scroll comment up
  • Scroll comment down
  • Next branch
  • Return to last branch
  • Return to last branch2 (does this mean penultimate visited one, or in hierarchy?)
    which are all good, yet I
  • middle button of the 5-way button opens 'comments'

suggest to give the very useful option

  • Return to main line of game

3) The program uses colours, the marked stones are grey, it is difficult to know what the variation ("ghost stone"?) is, and which one is referred to in the comment. (this is an old comment)
Letters in comments (see example game below), are not given on board [10] . Several fatal exceptions/alerts occured here [30] .

4) Program starts with move zero: white´s reply in an even game gets move number 1 [10] .

3) and esp. 4) might have to with the SGF itself. I read once somwhere that one should not put commentary at the node of the first move. (true?) Or is a move a node and the comment for that move is another node anyway?

Concluding: I like the program very much and several limitations still have to be overcome. Especially the fatal alerts (where a total reset is necessary) are quite frequent. I guess that I had about 30 in two weeks only from Tengo.


[10] example game with multiple branches:
(this example comprises many variations referring in the text to small-letters 'a', 'b' etc. where the letters are not shown on the board)
Sakata-Takagawa ( ; FF[4] EV[Honinbo,7,Japan,Mainichi] RO[3, final playoff] PB[Takagawa Kaku] BR[7 dan] PW[Sakata Eio] WR[7 dan] KM[4.5] DT[1952-04-23,24] PC[Japan] RE[B+R] TM[36000] SO[[ext] http://gobase.org/games/japan/titles/honinbo/7/game-p-f.sgf] AP[sgf2misc:3.1.9] ;B[pd];W[ec];B[pp];W[eq];B[cp];W[jq];B[do];W[cd];B[ci];W[qf] ;B[nc];W[rd];B[qh];W[qn];B[qc];W[pe];B[qk];W[nq];B[np];W[mp] ;B[no];W[qq];B[qp];W[pq];B[oq];W[or];B[op];W[mq];B[nr];W[pr] ;B[mo];W[kp];B[qd];W[rc];B[rb];W[od];B[re];W[oc];B[oe];W[nd] ;B[of];W[kd];B[mf];W[pk];B[ql];W[qj];B[pl];W[pj];B[ol];W[qe] ;B[sc];W[rf];B[sd];W[pg];B[md];W[mc];B[lc];W[nb];B[ld];W[lb] ;B[oi];W[ph];B[rj];W[ri];B[qi];W[pi];B[rh];W[mi];B[kc];W[nk] ;B[kb];W[ne];B[nf];W[pb];B[gc];W[cg];B[ei];W[me];B[le];W[lf] ;B[mh];W[rn];B[li];W[rk];B[si];W[rl];B[sg];W[nh];B[lh];W[sf] ;B[rg];W[rp];B[ko];W[jo];B[kn];W[mj];B[kk];W[lk];B[kl];W[nl] ;B[pn];W[ll];B[fe];W[kj];B[kf];W[lj];B[dq];W[ep];B[eo];W[fo] ;B[fn];W[go];B[gn];W[hn];B[hm];W[er];B[cc];W[dc];B[bd];W[bc] ;B[ce];W[cb];B[dd];W[ed];B[cc];W[qb];B[cd];W[bb];B[ee];W[df] ;B[de];W[ra];B[in];W[ho];B[io];W[ip];B[jn];W[lp];B[jj];W[ki] ;B[ji];W[kh];B[jh];W[kg];B[jg];W[cj];B[bj];W[cn];B[dm];W[bk] ;B[ck];W[cr];B[bq];W[gm];B[fm];W[lg];B[jp];W[dp];B[co];W[ke] ;B[jf];W[jc];B[jb];W[jo];B[fb];W[eb];B[jp];W[dj];B[bl];W[jo] ;B[ea];W[da];B[fa];W[im];B[hl];W[km];B[lm];W[jm];B[il];W[om] ;B[hp];W[lo];B[ln];W[mn];B[jp];W[mm];B[iq];W[hr];B[ir];W[kr] ;B[cq];W[gq];B[ac] C[time used: W 9h 59m \ B 9h 18m ] )


[20] example game with multiple branches:
(this example seems not the one where the letters are not shown, also the move numbering is correct here)
(;GM[1]FF[4]CAUTF-8AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.00] PW[Sakata Eio 9d]PB[Go Seigen 9d] ;B[qd]CR[qd]C[Go Seigen (Wu) vs. Sakata (The 1st Japan's Strongest Deciding Matches)

Date: May, 1957 Place: Matsuyama] ;W[pp]CR[pp]C[This game is played near a hot spring in Matsuyama, Shikoku (one of the main Islands of Japan). Meanwhile, the referee is Fujisawa Hosai 9-dan. Shikoku is a place where Go is very popular. This time, the arrival of five 9-dans at the same time (should be four 9-dans; Takagawa is still 8-dan then) is a rare chance for Go fans, thus the entusiastic greetings from the fans were unprecedented.]

B[cd]CR[cd]LB[dc
A]C[COMMENTARY BY GO SEIGEN HIMSELF

Black creates a mukai komoku (two komoku stones facing each other). This is a fuseki I have used quite often recently.

When I was 4- or 5-dan, I'd sometimes play at A. This is only the difference in personal inclination, nothing deep.] (;W[ec]CR[ec]LB[jc:C][oc:A][ed:B][dq:D]C[If White played at A instead. when Black played B and White C, Black would occupy D in the lower left.

In such an arrangement, White's current move is better than A. This is common sense in fuseki (see variation).]

B[oc]CR[oc]C[Black plays kogeima shimari (kogeima
small knight's move, shimari: corner enclosure). This is the most solid move for Black.]

;W[eq]CR[eq]C[Up to here, this opening also appeared in the games when I played Iwamoto Kaoru 8-dan and Takagawa Honinbo. In those games, they were White, too.

(Before, ina game between Sakata 9-dan (White) and Takagawa Honinbo, the exact same opening appeared as well. Perhaps because of this, in this game, both sides spent little time to get to this point.)] (;B[hd]CR[hd]LB[gd:A]C[Black could also consider playing A for a one-space pincer. In a game between me and Takagawa Honinbo, I played this way (see variation) and Sakata 9-dan played this way (see second variation) in Honinbo Sen.

In short, under this arrangement, there are various ways like one-space or two-space pincers.] ;W[ef]CR[ef]C[This and the following Black move...] ;B[cg]CR[cg]C[...are the simplest joseki.]

W[qi]CR[qi]LB[qj
B][cp:A]C[This is the biggest fuseki point.

Of course, the shimari at A is also big, but under this current situation, it's difficult for Black to play there himself (see variation).

Besides, a move at B would be extremely good for Black, and White prevents that here. From this standpoint, this is indeed the best point.] (;B[cq]CR[cq]LB[cp:A]C[Since the approach at C4 is not very good (see variation), Black chooses to play here.] ;W[do]CR[do]C[Naturally.] ;B[co]CR[co] (;W[dn]CR[dn]LB[cn:A]C[White cannot play at A, so this is the only move (see variation).] ;B[cn]CR[cn]C[Extending is the only move for Black.] ;W[dm]CR[dm]TR[cq]C[At this point, it's obvious that Black's marked stone has added a force in the corner, which is clearly better than C4.]

B[nq]CR[nq]LB[pn
A][ip:C][jq:B]C[When Black approaches here, White has many ways to respond, and the choice is difficult.

If White simply jumps to A, Black would immediately extend to B or C. If so, it would be an easy game for Black.] (;W[oq]CR[oq]LB[lq:A]C[White chooses to play kosumi-tsuke...

White could also play at A... (see variation)] ;B[np]CR[np] ;W[kp]CR[kp]C[...and then to extend from the wall on the left.

The purpose of this sequence is to prevent Black from getting into the corner AND to create a pincer attack on the Black stones. That is, White is trying to make moves on both sides. A greedy move.] ;B[po]CR[po]C[This is the urgent point.] (;W[oo]CR[oo]LB[qo:A]C[White could have played at A, but chose this hane instead, initiating a violent fight.

The reason that White plays so violently is because ladders to the upper left are good for White.

(see variation for a White move at A instead)] ;B[op]CR[op]C[White has read out that after Black plays here...]

W[pq]CR[pq]LB[qo
A]C[...the severe move at A is not as effective since the ladder works for White.

From a strategical standpoint, since Black gained in the lower left corner, it's natural for White to force Black to fight inside of White's sphere of influence - White hopes to gain in the process.] ;B[qo]CR[qo]C[Black sagari (extend downwards) and accepts the challenge to a fight. The result of this battle would directly affect the oucome of the game. Thus we reach the first climax of the game.] (;W[no]CR[no]LB[on:A][rp:C][rq:B]C[Based on the shape, it seems natural for White to play at A. However, that would give black the opportunity to play at B.

If White played here at C instead... (see variation)] ;B[mo]CR[mo]C[Black exchanges N5...] ;W[mn]CR[mn]C[...for N6. Neither side can give in an inch.] ;B[nr]CR[nr] (;W[rq]CR[rq]LB[lo:A]C[If White were to play this move at A... (see variation)]PL[B]

B[lo]CR[lo]LB[om
A]C[Black extends...]

(;W[pn]CR[pn]LB[om:A]C[...and White hane. Normally, he would play at A, but in this situation he cannot do so... (see variation)] (;B[rp]CR[rp]LB[qn:A]C[This is a tesuji.

If Black plays at A instead... (see variation)] (;W[qp]CR[qp]LB[qm:B][qn:A]C[White has no choice but to play here, and later live with R2.

If he plays A or B instead... (see variations)] (;B[ro]CR[ro]LB[rn:A][sp:B][qr:C]C[Can Black play A instead?

If White plays at B right after and then plays C to live, of course A is better for Black.

However, if White doesn't play B and instead plays C directly to live, Black would have some trouble (see variation).] ;W[qr]CR[qr] ;B[om]CR[om]C[This is the most urgent point.] (;W[on]CR[on]LB[pm:A]C[White must connect, and Black gains in sente.

If White tries something else at A... (see variation)] ;B[ql]CR[ql] ;W[pm]CR[pm]C[White pushes. He has no other way but to determinedly hang on.] ;B[pl]CR[pl] ;W[ol]CR[ol]C[A violent fight beings.] ;B[nm]CR[nm]C[Such close combat so early in the opening is rarely seen in today's high-dan games.] ;W[nn]CR[nn] ;B[ok]CR[ok]C[Black atari...] ;W[nl]CR[nl] ;B[ko]CR[ko]C[...and extend. This combo is delivered in good order. After White's push and cut, this picture is expected.] ;W[nk]CR[nk]

B[or]CR[or]LB[rk
D][rl:C][qm:A][rm:B]C[There is nothing deep about this move, but consider:

Later, after the sequence from White A to Black D (of course White can't play this right now), this move would no longer be sente. Therefore, to make this exchange and gain while it's still sente is good.] ;W[pr]CR[pr] ;B[oj]CR[oj] (;W[jp]CR[jp]LB[rn:A]C[White has no choice but to play here.

If he were to play at A instead... (see variation)] ;B[km]CR[km] ;W[nj]CR[nj] ;B[oi]CR[oi]C[These moves are certain. This move sealed the first day of the game.] ;W[lq]CR[lq]C[Against this move...] ;B[jo]CR[jo]C[...Black has a good reply.] (;W[ip]CR[ip]LB[mp:A]C[White cannot play at A... (see variation)]

B[mq]CR[mq]LB[lr
A]C[This is the best way to protect the cut. Later, Black can gain an eye in sente at A.]
W[lm]CR[lm]LB[rn
A]C[This move also aims at the tesuji at A.]
B[ln]CR[ln]LB[rn
A]C[Not only does this move prevent the tesuji at A (shortage of liberties for White), it also helps to make an eye.

The most efficient move.] ;W[kl]CR[kl]

B[jm]CR[jm]LB[ll
B][mm:C][rn:A]C[Black absolutely CANNOT atari at B, since White's reply at C would free up precious liberties and the tesuji at A would work again.]

;W[lr]CR[lr]C[This move is extremely big.

From a profit standpoint, it's an anti-sente move worth 6-7 points (compare it with a sente Black hane here), and it has the purpose of taking away Black's eyes and attacking Black.

A huge point.]

B[jl]CR[jl]LB[qg
F][ki:E][jj:D][kj:C][jk:B][kk:A]C[This move puts White in a dilemma.

If White plays A, giving rise to the sequence up to D. All of the pushes here would be unbearable to White, and when White is finally forced to extend again at E, Black would take F, an extremely good point.] (;W[pg]CR[pg]LB[of:B][qf:A][rk:C]C[White temporarily puts the left side on hold, and plays here on the right.

If White played at A instead, after the cap at B White would be in trouble.

Also, it might be tempting to play at C first, but... (see variation)]

B[qj]CR[qj]LB[rn
A]C[This is the key point for both sides' eyeshape; absolutely impossible to pass by.

Also, this move removes the aji at A.]

W[ll]CR[ll]LB[rn
A]C[Since the aji of A is gone, Black could cut here if White fails to play. So White connects here at M8.]
B[hn]CR[hn]LB[fq
A]C[Black plays the key point of both sides. This point acts as a hinge for White's moyo, and if he had played here the difference would be tremendous.

In addition, this move creates a tesuji at A.

After this move, the violent fight comes to a pause. Based on the result up to now, White didn't quite get what he had hoped for. Black is better.] ;W[rj]CR[rj] ;B[rk]CR[rk] ;W[pj]CR[pj]C[A severe method, initiating a ko fight.]

B[pk]CR[pk]LB[pi
A]C[This ko is light for White, since even if Black wins the ko and captures at A, it wouldn't be much of a loss for White.]
W[qk]CR[qk]LB[rl
B]C[On the other hand, if White wins teh ko and cuts at B, it would be a heavy burden to Black.

So if Black loses this ko, it would be huge.] ;B[sr]CR[sr]C[Black must take this ko seriously.] ;W[sq]CR[sq] ;B[qj]CR[qj] ;W[rd]CR[rd]C[This is a point White wants to get even if it's not used as a ko threat.

Excellent timing.] ;B[qe]CR[qe] (;W[re]CR[re]LB[qk:A][rl:B]C[If White used this move to recapture at A instead, Black would play here to capture the White stone.

Then, even if White cuts at B next, White wouldn't have enough threats and would lose the ko (see variation).] ;B[rc]CR[rc]C[White has invested quite a bit here now, so when Black hane...] ;W[qf]CR[qf]C[...this move cannot be omitted.] ;B[pi]CR[pi]C[It is now a fair trade to both sides.] ;W[pe]CR[pe]C[Even though White lost the ko...] ;B[pd]CR[pd] ;W[oe]CR[oe]C[...White rushes out, and should be satisfied.

Since White was fighting within Black's influence, getting such a result is quite decent.]

B[mc]CR[mc]LB[nc
A]C[This point is a must.

If Black tenuki (plays elsewhere), a White move at A would be severe.]

W[qc]CR[qc]LB[sd
B]C[Great timing.

If White tenuki, Black would immediately hane at B and the difference would be big.] ;B[qb]CR[qb] ;W[sc]CR[sc] ;B[rb]CR[rb]C[White gains in sente.] (;W[cp]CR[cp]LB[cm:A]C[White's purpose here is to start a violent fight, in order use the thickness to gain the best results.

If White at A instead... (see variation)] (;B[dp]CR[dp]C[Black cannot block from the bottom... (see variation)] ;W[bp]CR[bp]C[When White sagari (descends)...] ;B[dq]CR[dq]C[...Black connects. White's next move is difficult.] (;W[bq]CR[bq]LB[cm:A][ep:B]C[Based on the actual results of the game, this move might be worth reconsidering... (see variation for alternate moves at A or B)] ;B[ep]CR[ep]C[Certainly Black plays here.] (;W[fp]CR[fp]C[The only move (see variation).

White plays here...] ;B[fq]CR[fq]C[...to exchange for Black F3.

Then...]

W[cm]CR[cm]LB[hq
A]C[...White finally captures the two stones.

This way, a Black move at A lacks the same punch... (see variation)] (;B[gp]CR[gp] ;W[hq]CR[hq]C[White is settled, and the fight in the lower left draws to a temporary conclusion.

Locally, White got the corner and gained, but to lose sente is questionable. That is to say...] ;B[rg]CR[rg]C[Black gets to play here...] ;W[rf]CR[rf] ;B[qh]CR[qh]C[...and here, taking not only a big gain in territory, but also depriving White of eyeshape.

Even though he lost a bit in the left corner, this should satisfy Black.

The is the result mentioned earlier, when White 96 was brought into quesiton.]

W[md]CR[md]LB[le
A]C[Another questionable move. Because of this move, Black's top side solidifies.

A looser move at A would have been tougher to handle.] ;B[ld]CR[ld]C[The hane is the only move, no other choice.] ;W[nc]CR[nc]C[This is a severe tesuji.] ;B[nb]CR[nb]C[Black can only respond from below; no other choice.] ;W[nd]CR[nd] ;B[lc]CR[lc]C[White gained in sente, but Black is solidified.] ;W[le]CR[le]TR[md]C[This hane...] ;B[ke]CR[ke] ;W[kf]CR[kf]C[...and this one, too, are tesuji moves calculated when White played the marked stone.] ;B[lf]CR[lf] ;W[me]CR[me]

B[lg]CR[lg]LB[hb
B][je:A]C[White might have expected Black to play at A instead, but even with A there is a hole for a White invasion at B. Therefore, A would be slightly slow for Black.

A strong move!] ;W[ob]CR[ob]C[A clever yose move...] ;B[lb]CR[lb] ;W[qg]CR[qg] ;B[rh]CR[rh] (;W[mg]CR[mg]C[A good move (see variation).]

B[ed]CR[ed]LB[mh
A][nh:B]C[If Black played at A here, aiming to split White and attack both groups, White would also hane at B, and Black wouldn't get what he wants.

This shows Sakata 9-dan's extraordinary skills. At first glance it seems like both White groups are under attack, but after N13, even an expert like Go Seigen could not find a strong move to continue the attack.] (;W[dc]CR[dc]LB[fd:A]C[The only move.

If White hane at A instead... (see variation)] ;B[cc]CR[cc] ;W[cb]CR[cb] ;B[bb]CR[bb] ;W[gc]CR[gc] ;B[dd]CR[dd] ;W[hc]CR[hc]TR[ob]C[Now White regrets the marked move a little, because Black's response is hurting White here at the top.] ;B[jf]CR[jf]C[A clever move. It seems the ladder works for White, but...] (;W[da]CR[da]LB[ib:B]TR[kf]C[...White cannot save the marked stone (see variation).

Instead, a White move here is necessary, because after Black captures the marked stone, without D19, a move at B would destroy White's eyeshape.] ;B[kg]CR[kg] ;W[mh]CR[mh]C[This move finally connects White's top and bottom groups.] ;B[cj]CR[cj]C[But now Black leads in territory.] ;W[fd]CR[fd]C[If White plays endgame in the normal way now, he would not have enough points.

Therefore, with this move...] ;B[fe]CR[fe] ;W[ee]CR[ee]C[...and this cut, he hopes to find a chance to turn it around.] ;B[ge]CR[ge] ;W[ch]CR[ch]TR[fd]C[This is the tesuji White was aiming at with the marked move.] ;B[dh]CR[dh] (;W[cf]CR[cf]LB[dg:A]C[This move is better than a cut at A... (see variation)]

B[bf]CR[bf]LB[be
B][bg:A]C[If Black plays at A instead, White B would kill the corner.]

;W[bg]CR[bg] ;B[dg]CR[dg] ;W[be]CR[be] ;B[df]CR[df] (;W[af]CR[af]LB[ce:A]C[White has no choice but to capture the stone here...

There is a simple variation if White plays at A instead, but... (see variation)] ;B[ce]CR[ce]C[When Black atari...] ;W[di]CR[di]C[...White hane...] ;B[ci]CR[ci] ;W[de]CR[de]C[...and cuts, creating a ko. White's goal now is to seal Black from the outside.] ;B[bf]CR[bf] ;W[na]CR[na] ;B[mb]CR[mb] ;W[cf]CR[cf] ;B[bc]CR[bc]C[Black gets to play here because the ko is not "tight" for Black (his four stones are not under atari).

]

W[eh]CR[eh]LB[bh
A][ei:B]C[If White connects at A instead, Black will B because the ladder works for him.]

;B[bf]CR[bf] ;W[pb]CR[pb] ;B[pc]CR[pc] ;W[cf]CR[cf] ;B[bh]CR[bh] ;W[eg]CR[eg]C[White seals Black in.] ;B[bf]CR[bf] ;W[od]CR[od]C[If the ko fight continues on the left, White wouldn't expect any immediate gain, so it's more urgent to settle the weak group on the right side first.] ;B[qc]CR[qc] ;W[cf]CR[cf] ;B[ch]CR[ch] ;W[ba]CR[ba] ;B[bf]CR[bf] ;W[fj]CR[fj] ;B[ej]CR[ej]C[This is the key point to attack White.] ;W[ei]CR[ei] ;B[dj]CR[dj] ;W[gi]CR[gi] ;B[fk]CR[fk]

W[cf]CR[cf]LB[hj
B][gk:A]C[White cannot play A because Black would peep at B and White would be in danger.]

;B[ah]CR[ah]C[A tesuji.] (;W[hj]CR[hj]LB[ag:C][jj:A][gk:B]C[A shape move. Now A and B are miai.

It would not do White any good to resist at C... (see variation)] ;B[gk]CR[gk] ;W[jj]CR[jj] ;B[bl]CR[bl]C[This moves presses...] ;W[bm]CR[bm]C[...and forces White to respond. It's quite painful for White, but he has no choice but to answer.] ;B[br]CR[br]C[Then B2...] ;W[ar]CR[ar] ;B[cs]CR[cs]C[...and C1 are big yose moves.] (;W[el]CR[el]C[White MUST play here.

If he doesn't... (see variation)] ;B[gj]CR[gj] ;W[ii]CR[ii] ;B[hh]CR[hh] ;W[hi]CR[hi] ;B[ki]CR[ki] ;W[jk]CR[jk] ;B[ib]CR[ib] ;W[gd]CR[gd] ;B[he]CR[he] ;W[ic]CR[ic] ;B[jb]CR[jb] ;W[jc]CR[jc]C[Although all three of White's groups are now settled, White is trailing behind in territory.] ;B[kc]CR[kc] ;W[ab]CR[ab] ;B[bf]CR[bf]

W[fb]CR[fb]LB[hb
A][ac:B][ag:C]C[White would get more points here at A, but would lose the big yose move at B.

That is, when White later tries to continue the ko fight and forces Black to play C, White B wouldn't be there, and White wouldn't gain anything.] ;B[cl]CR[cl] ;W[fo]CR[fo] ;B[gq]CR[gq] ;W[go]CR[go] ;B[hr]CR[hr] ;W[ho]CR[ho] ;B[hl]CR[hl] ;W[ir]CR[ir] ;B[hp]CR[hp] ;W[iq]CR[iq] ;B[er]CR[er]C[If Black played G2 here instead, White would play E2 and the Black gropu would not be clean.] ;W[gr]CR[gr] ;B[fr]CR[fr] ;W[sb]CR[sb]C[This is a sente move worth 4 points or more.] ;B[pa]CR[pa] ;W[hs]CR[hs] ;B[hb]CR[hb] ;W[gb]CR[gb] (;B[ag]CR[ag]C[This is worth 7 points or more (See variation where White plays here first).] ;W[hg]CR[hg] ;B[jd]CR[jd] ;W[gm]CR[gm] ;B[hm]CR[hm] ;W[ig]CR[ig] ;B[fi]CR[fi] ;W[fh]CR[fh] ;B[io]CR[io]

W[fm]CR[fm]LB[eo
A]TR[fo][go][ho][fp]C[If White doesn't play here, Black would push in at A and the four marked stones would be captured.

If White tried to save the four stones, the entire group would die.] ;B[rr]CR[rr] ;W[rs]CR[rs] ;B[lj]CR[lj] ;W[ph]CR[ph] ;B[mi]CR[mi] ;W[nf]CR[nf] ;B[oh]CR[oh]

W[og]CR[og]LB[li
C][ni:B][ik:D][kk:A]C[After this move, even if Black cuts at A, White can save both groups with B. If Black then plays C, White lives with D.]

;B[jh]CR[jh] (;W[lh]CR[lh]C[The only move... (see variation)] ;B[ih]CR[ih] ;W[gh]CR[gh] ;B[ji]CR[ji] ;W[qn]CR[qn] ;B[rn]CR[rn] ;W[sp]CR[sp]C[With this move, White is trying to live above (he has a sente capture at N7).] ;B[ik]CR[ik] ;W[ij]CR[ij] ;B[dl]CR[dl] ;W[am]CR[am] ;B[as]CR[as]C[Even if Black doesn't start a ko fight here, he is still better. Since he has more ko threats, though, he makes this move.] ;W[bs]CR[bs] ;B[ni]CR[ni]C[White resigns here.

He didn't achieve his goal after starting a fight in the lower right corner, and his situation grew worse and worse.

Time given: 10 hours apiece Time Consumed: Black - 4 hours 28 minutes White - 9 hours 59 minutes]) (;W[ih]CR[ih]C[White would love to play here but...] ;B[kk]CR[kk]C[...after the cut...] ;W[ni]CR[ni] ;B[ji]CR[ji]C[...White is dead.])) (;LB[ag:A]C[If Black fails to play at A...]PL[W] ;W[cf]CR[cf]C[White will start a yose sequence...] ;B[ag]CR[ag] ;W[ac]CR[ac] ;B[bf]CR[bf] ;W[bd]CR[bd]C[...to here. This is why White played G18 isntead of H18.])) (;W[]C[If White tenuki here...] ;B[am]CR[am] ;W[an]CR[an] ;B[aq]CR[aq]C[...after a throw-in, the group does not have enough eyes.])) (;W[ag]CR[ag]C[If White fights against Black's tesuji...] ;B[ad]CR[ad] ;W[bd]CR[bd] ;B[ac]CR[ac] ;W[aa]CR[aa] ;B[bf]CR[bf]C[It is a loose ko for Black (White needs to ignore three ko threats to win).])) (;W[ce]CR[ce]C[If White connects, it will be more peaceful but...] ;B[de]CR[de] ;W[bd]CR[bd] ;B[bc]CR[bc] ;W[bi]CR[bi] ;B[ci]CR[ci] ;W[bh]CR[bh] ;B[bj]CR[bj] ;W[af]CR[af]C[...White will live in gote and...] ;B[jj]CR[jj]C[...Black will get to jump to K10. He will get a considerable amount of territory on the outside, and White cannot be content.])) (;W[dg]CR[dg]C[If White cuts...] ;B[bg]CR[bg]C[...Black would go for the following exchange...] ;W[di]CR[di] ;B[eh]CR[eh] ;W[ci]CR[ci] ;B[ei]CR[ei] ;W[dj]CR[dj] ;B[ej]CR[ej]C[To here, although Black loses one stone, White loses a equal amount, so Black is not bad.])) (;W[kg]CR[kg]C[If White rescues this stone...] ;B[kh]CR[kh]C[Black happily plays here...] ;W[jg]CR[jg] ;B[mh]CR[mh]C[...because it gives him a chance to hane. Now this hane works, and White is hurt.])) (;W[fd]CR[fd]C[If White hane here...] ;B[dc]CR[dc]C[Black would get the benefit in the corner.

At this moment, the goal of the fight is to get the benefit of the corner.])) (;W[ng]CR[ng]C[If White plays here instead...]

B[mh]CR[mh]LB[nf
A]C[...Black gets to seal up White in sente. If White doesn't play at A now, Black will do so and kill the group.]))

(;B[hq]CR[hq]LB[fp:1][fq:2]C[After the marked exchange, if Black plays here...] ;W[gq]CR[gq]C[...White has G3.] ;B[fr]CR[fr] ;W[gr]CR[gr] ;B[gp]CR[gp] ;W[hp]CR[hp] ;B[fo]CR[fo] ;W[go]CR[go] ;B[fp]CR[fp] ;W[hr]CR[hr]C[White is safe.])) (;W[cm]CR[cm]C[White cannot block here. If he does...] ;B[hq]CR[hq]C[...Black will play a severe tesuji.] ;W[gq]CR[gq]C[White has no other choice but to exchange...] ;B[hp]CR[hp] ;W[hr]CR[hr] ;B[ir]CR[ir] ;W[gp]CR[gp] ;B[iq]CR[iq] ;W[go]CR[go] ;B[ho]CR[ho] ;W[fr]CR[fr] ;B[hs]CR[hs]C[...and after this, White still needs another move to completely capture the Black stones. This exchange is favorable to Black.])) (;W[cm]CR[cm]C[If White blocks here instead...] ;B[bq]CR[bq] ;W[bn]CR[bn] ;B[ap]CR[ap] ;W[bo]CR[bo] ;B[er]CR[er] ;W[fr]CR[fr] ;B[fq]CR[fq] ;W[gq]CR[gq]

B[fp]CR[fp]LB[ri
A]C[...White gains in sente with the sequence up to here, and can next play at A.

This would be the strongest way based on the results.]) (;W[ep]CR[ep]C[What if White blocks from this side instead?] ;B[bq]CR[bq] ;W[cm]CR[cm] ;B[bo]CR[bo] ;W[bn]CR[bn] ;B[ap]CR[ap]C[Black gets two stones...] ;W[cc]CR[cc]C[...in this situation, this can be called a strong move, and White can expect the following sequence...] ;B[bc]CR[bc] ;W[cf]CR[cf] ;B[dc]CR[dc] ;W[dg]CR[dg] ;B[ed]CR[ed]C[First an exchange...] ;W[hl]CR[hl] ;B[ik]CR[ik]

W[gj]CR[gj]LB[bf
B][bm:A]C[...then White tries to extend the moyo on the left. But after this, White cannot hope to get as big a stomach as he imagines.

Also, Black still has the capture at A and another large endgame move at B. Clearly, this situation is in favor of Black.])) (;B[bp]CR[bp]C[If Black blocks here instead...] ;W[dp]CR[dp] ;B[br]CR[br]C[...White gets a thicker outside in sente. Black absolutely cannot give in like this.])) (;W[cm]CR[cm]C[If White blocks here...] ;B[er]CR[er] ;W[fr]CR[fr] ;B[dr]CR[dr] ;W[dp]CR[dp]C[After this move, Black can actually tekui to get some other big points!] ;B[]C[Say Black tenuki here...] ;W[cp]CR[cp] ;B[bp]CR[bp] ;W[bo]CR[bo]C[If White cuts...] ;B[bq]CR[bq] ;W[bn]CR[bn]C[...White would get two stones in GOTE and would be trailing globally.])) (;W[qk]CR[qk]C[If White recaptures instead...] ;B[re]CR[re]C[... would take the stone in the corner.] ;W[rl]CR[rl]C[When White cuts...] ;B[qj]CR[qj]C[...Black takes back.] ;W[cp]CR[cp] ;B[bp]CR[bp] ;W[qk]CR[qk] ;B[rr]CR[rr] ;W[rs]CR[rs]

B[qj]CR[qj]LB[lp
A]C[And when Black takes the ko back again, White cannot find another suitable ko threat.

Threats like A would be too small.])) (;W[rk]CR[rk]LB[pg:A]C[If White plays here before A...] ;B[rl]CR[rl] ;W[qk]CR[qk]C[...White gains sente but...] ;B[pk]CR[pk]

W[pg]CR[pg]LB[rn
A]C[The aji at A disappears.

White cannot play this way.])) (;W[mp]CR[mp]C[If White cuts...] ;B[lp]CR[lp] ;W[mq]CR[mq] ;B[kq]CR[kq] ;W[kr]CR[kr] ;B[jq]CR[jq] ;W[mr]CR[mr] ;B[ip]CR[ip]C[...Black captures two stones and White's prospects in the middle are destroyed.

White loses big.])) (;W[rn]CR[rn]C[If White plays here...] ;B[qn]CR[qn]C[...Black would sacrifice the stones with R6...] ;W[qm]CR[qm] ;B[rm]CR[rm] (;W[sn]CR[sn] ;B[mm]CR[mm] ;W[ln]CR[ln] ;B[rk]CR[rk]

W[sp]CR[sp]LB[rm
B][sn:C][jp:A]C[...and the sequence would continue to here.

Although White has captured the five stones, Black has a huge move at A, and so is still good.

If White tries to do better in this sequence by playing B instead of C... (see variation)]) (;W[rl]CR[rl]C[If White cuts instead of extending...] ;B[sn]CR[sn]C[...Black would live first.] ;W[pk]CR[pk] ;B[sp]CR[sp] ;W[qk]CR[qk]C[When White is forced to capture the two stones...] ;B[sr]CR[sr]C[...Black jumps into the corner, killing it. This way, not only is this a huge loss, also White will have no way to attack Black's group on the lower side.]))) (;W[pm]CR[pm]C[If White tries to extend instead...] ;B[pl]CR[pl]C[Black blocks...] ;W[ol]CR[ol] ;B[nl]CR[nl] ;W[on]CR[on] ;B[ok]CR[ok] ;W[rm]CR[rm] ;B[rl]CR[rl]C[...and although White captures four Black stones, Black forms a ponnuki in the middle and White's loss is greater than the gain.

The proverb says "a ponnuki is worth 30 points," and the power of this shape is clearly seen.])) (;B[rn]CR[rn]C[If Black connects with S6...] ;W[qr]CR[qr]C[White could play here directly.] (;B[ql]CR[ql]C[If Black jumps out...]

W[nm]CR[nm]LB[pk
A][lq:B]C[...White protects the cutting point.

Next, A and B are miai for White. Black is not good.]) (;B[om]CR[om]C[If Black peeps...] ;W[qm]CR[qm]C[...White plays a good move with R7.] ;B[ql]CR[ql] ;W[rm]CR[rm] ;B[on]CR[on] ;W[nn]CR[nn] ;B[rl]CR[rl] ;W[ln]CR[ln] ;B[ko]CR[ko]

W[pm]CR[pm]LB[ol
B][pl:A]C[Now, if Black tries to seal white in with A, White cuts with B and the ladder works for White.])))

(;W[qn]CR[qn]C[If White tries to block black inside, he is pushing too hard.] ;B[rn]CR[rn] ;W[ql]CR[ql] ;B[rm]CR[rm]C[First Black increases his liberties...] ;W[rl]CR[rl] ;B[rr]CR[rr]C[...then he plays S2 and wins the semeai.]) (;W[qm]CR[qm]C[If White plays a little bit loose at R7...] ;B[rm]CR[rm] ;W[rl]CR[rl]

B[rn]CR[rn]LB[ql
A][qq:B]C[The cut at A and the wedge at B are miai for Black, so he is still good.]))

(;B[qn]CR[qn]C[If Black plays here instead...] ;W[pm]CR[pm] ;B[qm]CR[qm] ;W[pl]CR[pl]C[...White would just extend to build up a solid wall, sealing Black inside in the process.

Even if Black lives inside, it would still be very unfavorable to him.])) (;W[om]CR[om]C[If White jumps instead...] ;B[pl]CR[pl]C[...Black also jumps.] ;W[pm]CR[pm] ;B[qm]CR[qm] ;W[ql]CR[ql]C[If White tries to cut...] ;B[qk]CR[qk] ;W[rl]CR[rl] ;B[rk]CR[rk] ;W[rm]CR[rm] ;B[qn]CR[qn] ;W[pk]CR[pk] ;B[ol]CR[ol] ;W[nl]CR[nl] ;B[ok]CR[ok] ;W[pj]CR[pj] ;B[rn]CR[rn]C[White fails since the ladder to the upper left works for Black.])) (;W[lo]CR[lo]C[If White hane instead...] ;B[qq]CR[qq]C[...then Black kills the corner with R3.] ;W[qp]CR[qp] ;B[rp]CR[rp] ;W[rq]CR[rq] ;B[pr]CR[pr] ;W[qr]CR[qr] ;B[or]CR[or] ;W[qq]CR[qq] ;B[ro]CR[ro]C[Black would win this semeai (capturing race).])) (;W[rp]CR[rp]C[If White plays here to protect the corner...] ;B[ro]CR[ro]C[...Black blocks...] ;W[qp]CR[qp] ;B[nn]CR[nn]C[...and Black throws out a net. Although the net doesn't work...] ;W[on]CR[on] ;B[om]CR[om] ;W[pn]CR[pn] ;B[pm]CR[pm] ;W[qn]CR[qn] ;B[rn]CR[rn] ;W[qm]CR[qm] ;B[ql]CR[ql] ;W[rm]CR[rm] ;B[rl]CR[rl] ;W[so]CR[so] ;B[no]CR[no] ;W[sn]CR[sn] ;B[nm]CR[nm]C[...Black gets to sacrifice the stones to seal White in from the outside. This way, White's moyo becomes thin in the face of Black's thickness.])) (;W[qo]CR[qo]C[If White plays here instead...] ;B[pn]CR[pn] ;W[op]CR[op] ;B[no]CR[no] ;W[qp]CR[qp]

B[ln]CR[ln]LB[qm
A][jn:B]C[...the sequence leads to here. If White jumps to A now, Black will jump to B and reduce White's moyo.]))

(;W[lq]CR[lq]LB[kp:B]C[If White pincers here...

(Playing at B instead is bad, see variation)] ;B[qq]CR[qq]C[...Black will invade the corner.] ;W[qp]CR[qp] ;B[pq]CR[pq] ;W[op]CR[op] ;B[nr]CR[nr] ;W[mo]CR[mo] ;B[pj]CR[pj]C[To this point, although Black gains the corner and this key point as well, White's outside moyo is also remarkable. This is another choice for White.]) (;W[kp]CR[kp]C[If White makes a high pincer...] ;B[qq]CR[qq] ;W[qp]CR[qp] ;B[pq]CR[pq] ;W[op]CR[op]

B[mr]CR[mr]LB[jq
B][nr:A]C[...Black would play here instead of at A, aiming to invade at B.]))

(;W[cn]CR[cn]C[If White plays here...] ;B[dn]CR[dn]C[...Black will cut, knowing the ladder doesn't work for White.] (;W[eo]CR[eo] ;B[cm]CR[cm] ;W[bn]CR[bn] ;B[bo]CR[bo] ;W[dm]CR[dm] ;B[en]CR[en] ;W[bm]CR[bm] ;B[cl]CR[cl] ;W[dl]CR[dl] ;B[bl]CR[bl]C[White fails.]) (;W[cp]CR[cp]C[If White tries this tack instead...] ;B[bo]CR[bo] ;W[dp]CR[dp] ;B[bp]CR[bp] ;W[cm]CR[cm] ;B[dq]CR[dq] ;W[ep]CR[ep] ;B[en]CR[en] ;W[dk]CR[dk]

B[dh]CR[dh]LB[dc
A]C[...it turns into a violent fight. If Black next plays a kosumi-tsuke (diagonal attaching move), White would be under attack.

This variation is not good for White, either.]))) (;B[cp]CR[cp]C[Suppose Black approaches the lower left corner here...] ;W[do]CR[do] ;B[co]CR[co] ;W[dn]CR[dn]C[Up to here, the Black stones are forced into a low position on the third line on both the upper and lower sides.

Therefore, enlcosing the lower left corner was not urgent for White and he played R11 instead.])) (;B[gd]CR[gd]C[In earlier games, Wu played the one-space pincer...] (;W[gc]CR[gc] ;B[fd]CR[fd] ;W[fc]CR[fc] ;B[ed]CR[ed]) (;W[ee]CR[ee] ;B[df]CR[df] ;W[id]CR[id] ;B[gf]CR[gf] ;W[gc]CR[gc]))) (;AW[jc][oc]AB[ed][dq]C[Black's form looks good.]))


[30] This file always produces a fatal exception/alert,

no matter whether I tried to open it with info (you can see the players names) or names (=filename)
it worked the 4th time

(;SZ[19]EV[Japan 2nd Kisei Title final game 5]DT[1978-03-01]PC[Japan]PB[Fujisawa Hideyuki]PW[Kato Masao]KM[5.5]RE[B+R]BR[9p]WR[9p]C[Copyright by gogameworld.com and weiqi.tom.com.];B[pd]C[In the first 4 games of the 2nd Japanese Kisei Title final, Kato led 3:1 and drove Fujisawa to the verge of abyss. In the game 5, Fujsawa attacked bravely and exquisitely, and managed to kill Kato's big dragon in an extremely thrilling and dangerous fashion.];W[dp];B[pq];W[dd];B[pk]

W[nc];B[pf];W[pb];B[qc];W[kc];B[jp]LB[fq
a]C[B11: Black first grabs the big point, placing more emphasis on the right-side "High Chinese Fuseki" . If Black approaches at 'a', then White will pincer at 11, it would lead to a steady and prolonged game.];W[hq];B[ho];W[fq]C[W12 and W14: White aims to take territory first in order to battle with Black's outside influence. Therefore, White makes the one-space extension with W14, and it is the proper play.];B[po]C[B15: It is important for Black to protect the corner. If Black greedily plays at around the tengen area, White can approach at 15 and easily live a group, Black would fail with his big moyo plan.];W[dj]C[W16 is the vital point for Sanrensei, this play is blameless. So far, it forms an imposing opening of the "High Chinese Fuseki" versus the "Sanrensei". The next move will decide the framework of the middle game fight.]
B[cc]C[Black approaches the corner with B17, it is a play to achieve the balance for the game. Black aims to prevent White from forming a big moyo on the left to the upper side. If Black immediately takes the tengen, it would become a simple game of Black's influence vs White's territory.];W[cd]LB[dc
a]C[W18: The direction of White's blocking is correct, if White blocks at 'a', then Black will crawl and live on the left. Because W10 is in a lower position, so White places great hopes on the left-side moyo.];B[dc];W[ec];B[eb];W[fb]C[The double hane of W22 is inevitable.];B[bd];W[be];B[ce]C[The play of B23 and B25 is correct, Black's strategy of persistently destroying White's moyo on the left is right.];W[ed]
B[bf];W[bc];B[ae];W[bb]C[Through W30, the fight In the upper left comes to an end, Black makes life with sente on the left side, and basically has restricted White's potential of forming a big territory on the left, Black has achieved his original plan.];B[iq];W[hp];B[io]LB[lp
a][ln:b]C[Black has reinforced the lower side with B31 and B33, which correlates well with B17, aiming to keep the balance for the game. Because White is very thick in the upper left to the top area, now if Black plays at around the tengen to gain influence, White will inevitably invade at 'a', followed by B31 and W 'b', Black has some weak points too, so he cannot kill White and has no assurance of success.];W[kq]LB[jj:a][jl:b]C[W34: White immediately invades into Black's territory, it is a planned move, if White plays at 'a', because Black already has a living group on the left with the sequence following B23, the white tengen stone can only serve as a reduction move and not an expansion to White's own moyo, so it would be

inefficient. Afterwards, Black needs only to answer at 'b' to secure the big territory on the lower side, White would be very hard to play.]

B[kp]C[The squashing move of B35 is a clever answer.];W[ir]LB[lq
a][jr:b]C[White has no choice but to hane over with W36, if White extends to 'a' instead, Black would diagonal-attack at 'b', the two white stones would form a clumsy shape.];B[lq];W[jr];B[ld];W[lc];B[nd]LB[jj:a][ne:b]C[After Black obtains sente with B37, B39 and B41 are good moves to expand Black's moyo at the top. If Black simple plays at 'a' to grab the tengen, White can jump to 'b' to enlarge White's moyo at the top as well as restrict Black's development in the lower right, this would make a huge difference from the real game.];W[oc]C[W42: White wants to enclose territory at the maximum limit, showing that White is very confident.]

;B[jj]C[B43 is the central point of the game, Black can grab this point and it can be said that Black's opening is successful.];W[qm]C[White invades right away with W44, it is very ferocious, this is an early game-deciding maneuver! Although this kind of play takes some risk, but if Black couldn't answer properly, Black's big moyo would get completely ruined, White could win the game at one stroke.] (;B[qk]LB[qo:a][qj:b][pl:c][rk:d][rl:e]C[The stand of B45 is the strongest answer, if Black reinforces the corner at 'a',then W 45, B 'b', W 'c', B 'd' and W 'e', White can make the sabaki play by fighting a ko (see var a).];W[qp]C[W46 is an asking move.];B[qq]C[B47 is strong and rude!];W[qo]C[The simple retreat of W48 is a little questionable, this is the main reason why White sinks into a bitter battle later on.];B[pp]C[In the game, after Black connects with B49, because White couldn't find Black's weakness, it is difficult for White to make life on the spot.];W[jl]C[W50: It is wise of White to start the reduction from outside.]

B[ll]LB[om
a]C[B51: Black insists on capturing the white stones on the right at a large scale, the attitude is very tough and brutal. In fact, right now Black needs only to secure the big territory on the right by making the knight's move at 'a', Black is already favorable in the game.]

(;W[lm]LB[kk:a][mk:b][kj:c][mi:d]C[W52: If Black encircles the whole right side, White would lose the game for sure, so White has to do all he can to charge ahead. If White simply makes the diagonal's extension at 'a', followed by B 'b', W 'c' and B 'd', Black can secure the right-side big territory, White would be no good (see var a).];B[ml]LB[mm:a]C[When White attaches with W52, the retreat of B53 is a calm and good move. If Black hanes at 'a', White would twist-cut at 53 to stir more troubles, Black instead would be not easy to control the situation.];W[pn] (;B[nn]LB[om:a][on:b][nm:c]C[After White hangs with W54, the cap of B55 is the right move. If Black knight-attacks at 'a', then W 'b', B 'c' and W 55, White would be easy to make sabaki plays by using W52 (see var a).];W[om];B[pl]C[Black has destroyed White's eye space with B57, it is the most relentless and fierce play! Both sides have no way to back down, a big life-and-death "dragon-killing" fight has officially started.];W[ok]C[The attachment of W58 is the only possible sabaki play.];B[pi]C[The jump of B59 is the correct move, Black seeks not to leave any aji for White to exploit.];W[nm];B[mm];W[nk]

B[ni];W[mj];B[li]LB[mi
a][lj:b]C[After White doubles up with W62, B63 and B65 are inevitable to seal off White. If Black instead presses at 'a', White needs only to stick his head out by extending at 'b', Black could no longer capture White.];W[mi];B[mh];W[mn];B[ln]LB[km:a]C[The cut of W68 is an asking move, however the atari of B69 is a little doubtful, for Black to atari at 'a' would be better.];W[lj];B[kj]
W[mo]LB[kk
a]C[B71 is the strongest killing move, but after White extends with W72, White is left with the ambush maneuver in the center by playing at 'a', the situation becomes chaotic.];B[oo];W[rq];B[rr];W[rl]LB[rn:a][qn:b]C[White goes all out to enlarge his eye space with W74 and W76, it is a common play. If White simply makes the diagonal's extension at 76, then B 'a', W 'b' and B 74, White would be killed easily.];B[rn]C[The striking move of B77 is correct.];W[ro]LB[qn:a][rp:b]C[White hangs with W78 tenaciously, if White simply connects at 'a', then Black could capture one stone at 'b' and kill White.]
B[sn]LB[sq
a][sp:b][sr:c]C[The stand of B79 is the most ferocious killing move! if Black ataris at 'a', then W 'b', B 'c' and W 79, locally White could live by a ko fight.];W[qn];B[sq];W[sp];B[rp];W[lh];B[ki];W[rq];B[sr];W[nh]
B[mg]C[The fight in the lower right comes to an end with the sequence from B81 to B87, Black has done all he can to fight back White's sabaki plays, Black is successful in this fight.];W[ng]C[W88 and W90
White launches the last pounding at Black's weakness, the fight over here will decide the game with one action.];B[mf]C[Black has no choice but to retreat with B91.];W[pg]C[White fails to calculate accurately in the subsequent capturing race, W92 is the losing move of the game!];B[ri]C[B93 is a brilliant move of the most skillful "dragon killer"! In order to calculate precisely all the variations after B93, Fujisawa has pondered for 2 hours and 57 minutes! This is his longest thinking record. B93 has consumed one third of the 9-hour regular time! It is also the move that decides the outcome of this game.];W[qg]C[W94 costs White to think for 1 hour and 55 minutes! But it is too late!];B[oh];W[og];B[rh]C[In the game, B95 and B97 are simple and good moves.];W[rk]

;B[rj];W[qf]C[Although W98 and W100 are the strongest tactic for extending ones liberties, ...];B[pe];W[kk];B[km];W[oj];B[oi];W[pj];B[qj];W[rd];B[rc];W[rf];B[qe]

W[re];B[sg]C[The diagonal's extension of B113 is a good move for reducing liberties. In the capturing race, White is short two liberties.];W[lf]C[W114
White turns to run the capturing race with the upper-right black stones, it is already White's final desperate struggle!];B[nf];W[lg];B[jg];W[jf];B[le];W[kf];B[hj]C[B117 and B121 are steady moves to reinforce the center .];W[of];B[ne]
W[md];B[pc]LB[qb
a]C[B125: If Black mistakenly blocks at 'a' to reduce the liberties, Black's corner would get killed by shortage of one liberty.];W[qb];B[rb];W[ra];B[sb];W[sd];B[sf]C[After Black tightens the liberties with B131, White has no choice but to concede defeat.])

(;B[om]C[If Black answers with the knight's move ...];W[on];B[nm];W[nn]C[This way White could have more aji to exploit.])) (;W[kk]C[if White plays here, ...];B[mk];W[kj];B[mi]C[Black would surround the whole right-side territory.])) (;B[qo]C[If Black protects the corner, ...];W[qk];B[qj];W[pl];B[rk];W[rl]C[White could play a ko like this.]))


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(OC) 2011 the Authors, published under the OpenContent License V1.0.
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