Harry's Trade – A Tribute to AlphaGo (2017)
A Tsume-Go in the Upper Left Corner
It might be tempting, but Black must not recapture White's four -stones in the lower right with . | |
White's cut at is tesuji. Black cannot give atari at , because her sagari to will be fatal, due to Black's shortage of liberties on both sides. White's placement at is her second tesuji. Black will not answer at or at , because White's cut at would be sente thereafter. Please note that we display only one variation here. More details are given in the "Variations of Our Solution" ( 566c). | |
Black's sagari to is a sacrifice for getting sente. Black captures two White stones, but ... | |
... Black is unable to capture White's throw-in at with a move at . White's atari at forces Black to capture in the corner, where after turns Black's potential second eye into a false one. | |
Finally, Black establishes a small living group in the corner, where after White captures several of his stones in gote. | |
Compared to the correct line of play, Black gained one point in the upper left corner (), three points in the lower left () and eight points (, ) in the lower right; in total 12 points. White will win the game by about ten points. | |