# Tsumego From Games 141 / Attempts

Sub-page of TsumegoFromGames141

kb: What a great problem! Aji is incredible, isn't it?

Main line (submitted by unkx80)

Black may try a, b or c.

(It turns out that is necessary for White to live!)

unkx80: Huh, my reading is not so complicated, should not be needed.

### Black a

Black at a ( = )

Black may try i, j, or k.

Black at a

unkx80: If at a, then White b snapback. After , Black cannot avoid connect-and-die from b.

Black at a, continued at i

The ladder at x is broken by .

Black at a, continued at i, other try
Black at a, continued at j
Black at a, continued at j, #2
Black at a, continued at k

Three liberties to two, White wins by one. (Refer to Black at a to see that extending at will not gain any liberties.)

### Black b

Black at b

After , play reverts to for Black at a.

### Black c

Black at c

a and b are miai for life

hhw: my attempt.

forcing first, part 1

hhw: White can force on the side first...

forcing first, alternative

Dave: I like hhw's forcing sequence. However, White should continue once more with here instead of above. After anything like , Black can not play at a ( above becomes unnecessary), so makes b and c miai for life. If Black answers with d, White will force twice starting with e and then turn at f, capturing Black.

forcing first, part 2

hhw: ...and then enclose the Black group.

possible continuation, at

hhw: seems to allow White to get both groups out by itself.

### Tapir tries...

White to play, status of the marked stones?

Up to all moves were forced. Now there are several variants. (Basic ideas similar to hhw, but omitting his , which gives unnecesarry options to Black.)

There are four crucial points left.

After a White lives if b is sente (threatening to move out and disabling d in the process)

After b White lives with d (a and c miai) or a (undestroyable second eye because of snapback).

After c White can live directly with a (undestroyble second eye because of snapback.)

After d White escape, force Black and then wrap up the whole black group with . As White can make a second eye at a, Black can not win this capturing race.

Continuation Black d

So, Black playing at a is the only line not yet refuted.

Continuation Black a

After Black has not many options. Keeping White from getting to the outside is the best play, but White can live easily with a play at c (as Black can't play at d).

Black c fails, White can force at e and than capture with an eye at f

Black f is the only possibly resistance. But ends in disaster.

Continuation Black a - Black stubborn and pays for it.
Continuation Black a - Black stubborn and pays for it. Part II.

Tsumego From Games 141 / Attempts last edited by tapir on November 21, 2010 - 18:01