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Hello Peter: [...] Rather many major duals to your study, aren't there? :) [...] Talking about duals? Re: max number of pseudo legal move Here is a fun one for you, a position with 205 best moves: 3Q4/R6Q/2Q4Q/4Q3/1Q4Q1/3Q4/Q4RNp/2BK1Nkq w - - The best moves are: Ba3 Bb2 Bd2 Be3 Bf4 Bg5 Kc2 Kd2 Ke1 ...

Hello Larry: [...] Although this game was played 109 years ago, I met and spoke with the winner, Ed Lasker, in the 1970s! Amazing! There are different sequences of moves according to this site (via ChessGames ). I did not know about the game until now, but once Qxh7+ is played, I was right in many c...

Hello Ferdinand: I would like to know the time pressure of Grischuk in tournaments where he performed well, for example at Linares 2009, then compare with the rest of players of those tournaments. Disgracefully, I did not find any PGNs of Linares 2009 with time stats. Grischuk is well known to put h...

Hello Ferdinand: Does anyone can share a pgn with movetime or timeleft after move info of the past Meltwater Champions Chess Tours like Skilling Open, Airthings Masters, Opera Euro Rapid and Magnus Carlsen Invitational. Just the prelim games are enough. I would like to generate time pressure stats, ...

Hello Gabor: I did not have success in a fast search. However, I found other problem with similar theme (I suppose it since I have not got access to a chess engine right now) where there is only a difference in the square of the black pawn: g4 instead of c4. That problem is the number 324340 of Yet ...

Hello: Gusev vs. Auerbach ... once again. Analysed to death, though what a queen sacrifice! [d]4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 1 24 [Event "Molniya Sporting Society"] [Site "Chelyabinsk URS"] [Date "1946.??.??"] [EventDate "?"] [Round "5"] [Result "1-0"] [White "Yuri S Gusev"] [Blac...

Hello: [...] 4r1k1/p4pp1/2n2n1B/2b5/N6Q/P2q1N2/1r4PP/R4R1K b - - 1 23 positions(1) = 79 positions(2) = 3,319 positions(3) = 124,423 positions(4) = 2,859,642 positions(5) = 64,788,485 I can compute the value of position(6) but I ran out of spare time. In view of partial results at 16 steps of calcula...

Hello Mike: I have computed perft(8) value while I confirmed perft(7) of the first position with gperft 1.1 perft counter. I have also computed the number of unique positions with JetChess 1.0.0.0 perft counter. Here are the results: 4r1k1/p4pp1/2n2n1B/2b5/N6Q/P2q1N2/1r4PP/R4R1K b - - 1 23 Depth is ...

Hello: It is true that an exchange sequence of NNqBBr is not usually seen. But I paid attention on black moves from 13th to 15th (Qd8-c7, Qc7-b6 and Qb6-a5), which reminds me the original moves of the queen ( Wikipedia article on the subject ), which bring back memories of Kasparov - Karpov exhibiti...

Hello Vincent: Game is here : https://www.chessbomb.com/arena/2021-european-online-club-cup-playoff/03-Bartel_Mateusz-Artemiev_Vladislav Not very hard but SF13 needs depth 26 ! :cry: 21...Nxh4!! [d]r3k2r/1p2q3/p2p4/2p1pnB1/6pP/2NP1bP1/PPPQ1P2/R4RK1 b kq - 1 21 Bf3 + g4 are monsters in this position!...