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Yose from Games 5 Attempts
Difficulty: Advanced
Keywords: Problem
White 13 and 15 are of course kept back as ko threats. Black's territory is reduced to 8 points, while white has captured a stone.
Black 1 here instead of black 8 is not good. White makes a seki. This is 6 points worse for black than the previous answer.
In this position, I think that W 1 is the key point, instead of the atari at a. Next:
If Black connects, White makes seki in sente, for a result of -4. (White has lost 2 stones, but Black will have to give up one later.)
Oops! I had overlooked B 4, which avoids both seki and ko. :-(
If Black takes the corner, White captures 4 stones in sente. The result is also -4. White has 14 points, but Black has 10.
Bill: Since I had overlooked Black's play on the 2-1 (B 4 in the Key Point (1a) diagram), my original (supposed) solution was wrong. Let me try again.
(The squared Black stone was the last play before this diagram.) W 7 connects at the circled stone. This is a copy of the living page "Yose from Games 5 Attempts" at Sensei's Library. ![]() |