GR Game 3

    Keywords: Ongoing game

This is a RenGo.

Teams (about 17k EGF):

White: PeterA and MattHope

Black: BenH and BenS

Tromp-Taylor Rules, Komi = -1.5

GR Game 3 (moves 1-10)  

B1 BenS:

Migeru: Good.

W2 ppadams: Right, I'll go second shall I?

B3 BenH:

W4 MattHope: pretty patterns

ppadams: Two groups again.

B5 BenS:

W6 ppadams: Off we go.

B7: I think ppadams is too much of a 4-4 fancier.

W8 MattHope: perhaps

Migeru: Should have been at W10.

B9 BenS:

W10 ppadams: Yes, I think you're right. At the time I'd not twigged it was 4-4. White looks in serious trouble already.

GR Game 3 (moves 11-20)  

BenH B1: We're meant to be able to live here, I think.

Migeru: I think this is a mistake. Because of the three white stones in a line you want to play at B3 before here, but before you can do that you need to play B1 between B5 and B9.

MattHope W2: perhaps ;)

Migeru: Bending like that at the head of the opponents' chain is severe.

BenS B3 : With my suicidal tendencies (unintenional) it's unlikely...

ppadams W4: Good Matt, be aggressive, make them live small.

BenH: B5: Sorry to ignore your stone Ben, but I think this is necessary.

MattHope W6: I think we should keep you in the corner

BenS B7 : Feel free to ignore my stones Ben. Think of it as a handicap that your partner is effectively placing stones at random to see what happens.

Migeru: should have been at B9.

ppadams W8: OK, bored of that corner now. Let's play elsewhere.

BenH B9: I'm not sure you should have been bored. I think W8 at B9 would have killed it.

Migeru: Well, let's figure that one out.

MattHope: Agreed - I thought that (no offence BenS) that getting into a life and death in there would work in our favour even if it wasn't crystal clear.

MattHope W10: Think this keeps sente and muddies the waters for BenS

GR Game 3 (moves 21-30)  

BenS B1 : Waters quite muddy enough already thanks...

BenH: Well I'm not cringing -- that's what I'd have done.

ppadams W2: hey, we could come in here.

Migeru: I think this is a game-winning move, Peter.

MattHope: excellent - I was thinking just that but wondering if it was too aggressive.a 4 way peep :). Should be fun to play out

BenH B3: I can at least cut off one of the exits.

MattHope W4: taking the one that gets us connected first

BenS B5:

ppadams W6: Not sure I'm going to count this as one of my better efforts.

Migeru: This earns you 4 points in gote. It would have been better to either save it for later or play one space to the right, where it does threaten a monkey jump and is sente.

BenH B7: I don't want any monkey jumps here.

Migeru: This is necessary and sente, but there may be no monkey jump from W6 because it is not solidly connected to other stones. On the other hand, the monkey jump would be on the 2-1 point, and strange things happen there, so I don't know.

MattHope W8: think this is better at trying to get Sente back compared to F2

Migeru: F2 is solid, and honte.

BenS B9: hmmm... not sure what I should be aiming to do at this point.

Migeru: W8 was gote, so tenuki.

Bill: B9 would be better at a.

ppadams W10: Back to here then - if only I'd not ignored earlier.

GR Game 3 (moves 31-40)  

BenH B1: Quite a big move by ppadams, but I think it's gote.

Migeru: the move itself must be answered as you did, but it leads to a gote sequence. It's worth 8 points.

MattHope W2: can't see any reason not to play it out

Migeru: you should have played one space higher. White could have captured the white stone to take back the 8 points, but again in gote. There are safe moves on the board that are sente but smaller than 8 points.

BenS B3: hmmm...

Migeru: That is a sente worth zero points :-) In other words, kikashi, aji keshi and wasting a ko threat.

unkx80: This could be the losing move. Previously, Black a is a one-point sente, but after the exchange, Black a becomes a gote neutral point. So it loses points.

ppadams W4: OK.

BenH B5:

MattHope W6:

Migeru: I'm going to go out on a limb here and predict a white win by less than 2 points.

Bill: Interesting question: Can White win by 2.5?

BenH: I thought white was going to win by 1.5. If we're using chinese scoring, then either W loses by 0.5, wins by 1.5, or wins by 3.5 (or anything else in that progression). Were you using japanese scoring to get to 2.5?

Bill: Oops! Yes, I was using territory scoring. Viva Button Go! ;-)

BenS B7: Not much going on up here yet...

ppadams W8: Hmmm, best follow your lead I guess.

BenH B9:

MattHope W10:

GR Game 3 (moves 41-50)  

BenS B1:

Migeru: I would have played at W4.

BenH: Did it matter? I thought they were both 1 point/move moves. On the left, the alternative has one more W move and one more W point. The centre alternative has one more B move and one more B point.

Migeru: B1 at W4 threatens to cut in sente.

BenH: But the cut turns out to be worthless, since the group can live. And even if W answers by connecting, that still leaves my analysis above valid: B has played one more local move than in the current version, and got one more local point, which is the same rate as can be achieved elsewhere.

ppadams W2:

BenH B3:

MattHope W4: nearing the end

BenS B5: Nothing more to do top left i guess. Not sure what I should be aiming for now though.

BenH: That's the right move.

ppadams W6: I want this one more than that one.

Migeru: It makes no difference to area scoring, but the other one would lose you a point in territory scoring.

BenH B7: And we're done, and W wins by 1.5.

Bill: What about the bottom left corner? Does White have something there? (Not that it matters for winning or losing.) Is it obvious?

GR Game 3 Encore?  

Suppose that White continued this way. What now?

Migeru: The problem is not that white might make a live group, but that he might get seki. I think a is enough to kill white.

GR Game 3 Encore1  

W9 at W7.

Bill: W5.

Matthope B6: assuming A4 then B5 then A4 again follwed by B1 and I think that's it.

GR Game 3 Encore1  

Bill: Is this what you mean, Matthope? Then W1 makes seki.

Doh! that will teach me to do it in my head <sigh>

Bill: Doing it in your head is worth more than getting it right. :-) You were only one move short.

Xanthus: This looks like trouble for Black. I think B4 at W5 should do it. Throw-in if W plays at B4, if he doesn't I believe Black has just enough liberties.

GR Game 3 Encore2  

Bill: Yes. B8 is oiotoshi.

Bill: Comment. Even though White's speculative invasion should fail, I think making them can be both fun and instructive.

unkx80: While this speculative invasion does not work in this case, it almost worked. I don't think the result is obvious to the 17k players. At least, Black has pretty bad aji and White has a bag full of ko-threats. This means that typically, the hanging connection at 39 should be a solid connection.

Migeru: For what that's worth, I'm 9k and didn't find it obvious.

GR Game 3 last edited by on January 25, 2015 - 22:54
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