:: Igo Hatsuyôron 120 (2026)

The Non-Main-Semeai Solutions

After the Completion of the Hanezeki

Starting Point = White F2, J3

White F2, J3 as Moves #42, #44 (3 Jigo)

Black has already the first move for reducing White's upper right corner.

Instead of following Black with for an early Guzumi-Exchange, White plays the Hane in the lower left corner.

strengthens Black's position in the lower left corner, while stops the Hanezeki's Tail.

White F2, J3 as Moves #46, #48 (7 Jigo)

Here, Black has already completed the sequence for reducing White's upper right corner.

Instead of following Black with for an early Guzumi-Exchange, White plays the Hane in the lower left corner.

strengthens Black's position in the lower left corner, while stops the Hanezeki's Tail.



The Jûrokubango has come to an end.

Over the course of the Jûrokubango (bold section), Black's Initial Self-Play Success Ratio (the blue line in the diagram) stabilised just over 50%.

For a long time, it showed an downward trend, but has now reached the range between 0 and -5 again.

We are looking at a viable solution here !

28b's surplus of won games in the Jûrokubango (the red line in the diagram) has reached the "green" range above -5, while showing a strong upward trend.

28b has therefore mastered this variation just as well as 40b.



Please click the board for SGF-download ...
(28b = Black)

Please click the board for SGF-download ...
(28b = White)

The comments indicate the number of games in which the respective variation was selected.
E.g. "A=19 // B=264" == Variation "A" was played in 19 games, variation "B" in 264 games.
(The labelling is designed for SGF-editors that label next moves with capitals "A", "B", "C", ...)

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