Timing of the Guzumi Without
Harry's Hasami-Tsuke Sequence(2022)
Overview
Referenced by ( 1813) : The hanezeki's tail has reached its minimum length of two stones, caused by the two shared liberties of the large hanezeki groups and in the corner. In this chapter, we will refrain from playing Harry's Hasami-Tsuke Sequence in the upper right corner before my Guzumi . We wanted to find out whether not having fixed the shape in the upper right corner would increase Black's flexibility when playing my Guzumi. However, as we had to realise after the extensive analysis by KataGo, this is not really the case. | |
: ( G 1864) Black's push at is always a valid alternative option and consequently will not be considered by us in the following. If a Black move at was manually enforced, KataGo's self-play games thereafter (with komi = -1) ended in a draw (adjusted White + 2), even with a very large number of playouts. In these self-play games, KataGo mistaskenly blocked the path of the hanezeki's tail with a move at immediately. | |
: ( G 1865) KataGo assigned my Guzumi a win rate of about 30% (in Analysis Mode; with komi = -1), apparently having realised that this move was a mistake. | |
: (G 1866) KataGo assigned my Guzumi a win rate of about 40% (in Analysis Mode; with komi = -1). Contrary to the comparable position with Harry's Hasami-Tsuke Sequence already played, a Black move at the Guzumi Point will not affect the final score of the game. | |
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:( G 1867) As you will see below, continuing the Nakade Sequence with is a grave mistake, so this is the very last moment for playing my Guzumi. | |
: (85 1868) There were also self-play games in which KataGo immediately played Harry's Hasami-Tsuke at . However, KataGo tended to lose points unnecessarily, apparently miscalculation the effect of capturing Black's nakade too early. : ( A 1881) However, playing the solid connection at , instead, would have been better for her. White would gain one point overall, compared to Black's best line of play below. : | |
: : ( A 1883) However, it would have been better for him to follow the usual course of the game with connecting at , instead. : : : : | |
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Black must not play any reduction. After White's decision point, she will capture at , followed by and . | |
Capture Variation: Compared to Our Solution (2021), ...
In total, Black lost three points. White + 2 => White + 5 | |
Semeai Variation: Compared to Our Solution (2021), ...
In total, Black lost four points. Black + 4 => Jigo | |