Practical Endgame Test 7 / Discussion

Black to play and win.  

Chinese counting, no komi.

HolIgor: This is not a real test of yose skills. On the 10x10 yose board black needs 51 points to win. Black has 52, so the only problem is a ko in the upper left corner. Black has to eliminate the only ko threat.

Bill: If Black does that, he will end up with 52 points. His current count, however, is only 49 (evaluating the ko plus threat together as a ko ensemble) to White's 50.

It is a simple yose problem, in that all you have to do is find the largest play and make it. I do not think you would call this a tesuji or life and death problem. ;-)

unkx80: Which is why I stuck it with an Intermediate difficulty level. =)

Black to play and win.  

Thad: The answer should be obvious. Form the all powerful double B2 Bomber with 1. White starts the ko. Black takes right back. White has no ko threats, so starts to make the other ko. Black takes all upper right stones off the board.

unkx80: The sequence is good for Black but is not the correct play for White. However, this problem is indeed a tribute to the B2B Bomber.

This way?  

After B1-W2, neither party has ko-threats and the upper left is seki. B has 52, W 46 points; Did I miss something? Dieter

unkx80: No, you didn't. =)

Practical Endgame Test 7 / Discussion last edited by PJTraill on November 18, 2019 - 15:37
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