Harry's Trade – A Tribute to AlphaGo (2017)
A Tsume-Go in the Upper Left Corner
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It might be tempting, but Black must not recapture White's four |
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White's cut at Black cannot give atari at White's placement at Please note that we display only one variation here. More details are given in the "Variations of Our Solution" ( |
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Black's sagari to |
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... Black is unable to capture White's throw-in at |
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Finally, Black |
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Compared to the correct line of play, Black gained one point in the upper left corner ( White will win the game by about ten points. |

-stones in the lower right with
.
-stones are not entirely alive.
is tesuji.
, because her sagari to
will be fatal, due to Black's shortage of liberties on both sides.
is her second tesuji. Black will not answer at
or at
, because White's cut at
would be sente thereafter.
566c
is a sacrifice for getting sente. Black
captures two White stones, but ...
with a move at
forces Black to capture in the corner, where after 
establishes a small living group in the corner, where after White
captures several of his stones in gote.
.
), three points in the lower left (
,
,
,
), eleven points more than Black.
