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May 2002's Go Answer of the Month

Dia 1 - Black to play.

Dia 1

This is a game from the 2002 candidates' tournaments.

The result of the game after move 172 depends upon the life or death of the central black group. In the actual game, it died. Can you make it live?

The game so far in Ishi format. This now includes a handful of variations which show Black living.

Dia 2 - An answer.

Dia 2

173 here is I believe a move for Black which works. There may be others and there may exist a sequence I haven't yet tried which refutes this move. For now, I am assuming that this works and will show a couple of variations.

Many of the variations rely on atari of the six stone white string in the lower left of Dia 2 being sente to achieve life.

Dias 3 & 4 - Two white variations.

Dia 3   Dia 4

There are more in the Ishi file.

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