:: Igo Hatsuyôron 120 (2026)

The Non-Main-Semeai Solutions

After the Completion of the Hanezeki

Starting Point = White G2

White G2 as Move #40 (0 Jigo)

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



The Jûrokubango is still ongoing.

Over the course of 28b's self-play training, Black's Initial Self-Play Success Ratio (the blue line in the diagram) finally stabilised around 60%. During the Jûrokubango, it decreased by about 5% and is now in the "green" range.

It is therefore highly likely that we are dealing with a viable solution here.

28b's surplus of won games in the Jûrokubango (the red line in the diagram) is predominantly in the range of -15 to -10 (which means that 28b has by no means grasped this variation as well as 40b), but with a clear upward trend.

It is likely to take some time yet to reach a balanced state (-5% to 0%).

White G2 (after White P18)

as Move #42 (1 Jigo)

In the upper right corner, the first exchange of a P18-reduction of White's territory has already been played.

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



The Jûrokubango is still ongoing.

Over the course of 28b's self-play training, Black's Initial Self-Play Success Ratio (the blue line in the diagram) finally stabilised in the "green" range between 45% and 55%.

Recently, however, it has fallen sharply, so we will probably have to wait and see how things develop during the Jûrokubango.

White G2 (after White Q17)

as Move #42 (0 Jigo)

In the upper right corner, the first exchange of a Q17-reduction of White's territory has already been played.

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



The Jûrokubango has come to an end.

Over a long period of 28b's self-play training, Black's Initial Self-Play Success Ratio (the blue line in the diagram) finally stabilised in the "green" range between 50% and 55%.

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 range of -5 to 0 (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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