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How big is your chapter? The limit is 3000 moves in all branches.

"Does all of this really work like intended?" - Good question! I trust that niklasf is taking good care of this functionality. This is a new code (8 days?). 1) It does not work retroactively. 2) The D…

As per deterministic opening explorer sampling: "The current sampling rates are based on the idea to aim for roughly the same number of games in each group (rating + time control). If the group does n…

In July 2021 for this position r1bq1rk1/ppp1bppp/2n1n3/4P3/1P1P4/3BQN2/P2N1PPP/R1B2RK1 b - - 0 13 the opening explorer was showing it as belonging to thabogumpo (2243) - Telegin_Dmitriy22 (2106), 0-1,…

This is more serious than one may think. Move 8! r1b1kb1r/ppp2ppp/2nq4/8/2Bp2n1/N4N2/PPP2PPP/R1BQ1RK1 b kq - 1 8 Enter this in the explorer. 6 games will be given with 8... a6 move. However, 8... Be7 …

There are probably hundreds of thousand missing games from explorer. This is another hole r1b2rk1/ppp2p1p/5b1p/8/2BqQ3/2N4P/PPP2PP1/R3R1K1 w - - 3 15 Two games are mentioned for this position. But not…

Please see https://lichess.org/forum/lichess-feedback/bug-the-reindexing-missed-games I am not sure that reindexing was done properly unless it was limited to move 14. I thought that we are reindexing…

And another position: r3k1r1/p1pqbp1p/2p4p/3p4/3Q4/5N1P/PPP2PP1/RN3RK1 w q - 0 14 Only game dark_angel_rinat - Petrov_2004_Volod, 0-1, -, lichess.org/ TB3PB4k0 is given with 14. Kh2 but not 14. Kh1c5 …

This is another position r1bq1rk1/ppp2p1p/5bp1/4Q3/3p4/3B4/PPP3PP/RNB1R1K1 w - - 1 14 Two games are listed with (14. Qg2 and 14. Qg3 ) but there is nothing for 14. Qf4 that occurred in 2019, EHRAN (15…

There is a problem with reindexing. I came across several games which were left out when browsing Opening explorer. Example: Enter into the Opening Explorers this FEN r1bq1rk1/ppp2p1p/3b2p1/4Q3/3p4/3B…