White plays the Sagari in the corner, instead of continuing with on the outside of the Hanezeki.

Black takes the opportunity to separate White's forces in the Hanezeki with , instead of connecting with , as usual.

The Jûrokubango has come to an end.

Over the course of 28b's training, Black's Initial Self-Play Success Ratio (the blue line in the diagram) fell steadily to 50%, before rising sharply again of its own accord. Ultimately, it stabilised in the critical range (above 80%).

28b's surplus of won games in the Jûrokubango (the red line in the diagram) was in the range of 0 to -5. This makes sense in that both 28b and 40b won most of their games playing Black.

So we’re looking at a "false positive" here !

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", ...)