2620

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

Instead of following Black with for an early Guzumi Exchange, White blocks the Hanezeki's Tail.

The Jûrokubango has come to an end.

Until the Jûrokubango (bold section), Black's Initial Self-Play Success Ratio (the blue line in the diagram) stabilised just over 45%.

During the Jûrokubango, it fell sharply of its own accord. Ultimately, it stabilised in the critical range (below 20%).

28b's surplus of won games in the Jûrokubango (the red line in the diagram) was in the range of -10 to 0, showing an upward trend. This makes sense in that both 28b and 40b won most of their games playing White.

So we are 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", ...)