Hot off the back of my first match here are the results of the second 10 game match between the MCGP2024 and the Chessnut Evo Maia1900 bot set to look 6 ply ahead. This time I set the MCGP2024 to use the Modern (HIARCS) book and expected its result to be less than from the first match where it used the smaller Classic book. This subject has been covered before so I won’t dwell on the subject just that the ChessGenius program seems to perform better with the smaller book.
As a change from my previous posts, will just make a few comments on particular games but will include analysis from my PC engine. I think by now we all realize these dedicated machines make mistakes and will miss chances.
In the first match I based my estimated ELO rating of the Maia bot using the rating for the MCGP2024 on the Wicki ELO List web site (2339 for Active play). However, as the performance of the ChessGenius program can vary depending on the opening book used and I don’t know which book was used to calculate the Wicki ELO value I’m not sure how accurate my value of 2269 can be, but the performance difference of 70 points will be in the ball park for that match.
In the second match the result is quite different and this time the Maia bot won with a score of 5 ½ - 4 ½. This is around 35 points difference or half that from the first round.
There was some very exciting play but also some big mistakes from both sides. The first game however, is a draw:
Game 1/10
[Event "Modern book"]
[Round "1"]
[White "MCGP2024"]
[Black "Maia1900 6ply"]
[Result "1/2-1/2"]
[ECO "C44"]
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Bc4 cxb2 6.Bxb2 Bb4+ 7.Nc3 Nf6 8.O-O O-O 9.Qb3 Bxc3 10.Qxc3 d6 11.Bd5 Be6 $6 {Deep HIARCS 15.3: -0.36/23} ( 11...Bg4 {Deep HIARCS 15.3: -0.72/23} 12.Rfe1 Bxf3 13.Qxf3 Ne5 14.Bxe5 dxe5 15.Bxb7 Rb8 16.Bd5 Nxd5 17.Red1 Qf6 18.Rxd5 Rb2 19.Qxf6 gxf6 20.Ra5 Rc8 21.g3 c5 22.Rc1 c4 23.Rc3 Kg7 24.Rxa7 Re2 25.a4 Rxe4 26.a5 ) 12.Bxc6 bxc6 13.Qxc6 Rb8 $6 {Deep HIARCS 15.3: -0.17/25} ( 13...Qd7 {Deep HIARCS 15.3: -0.51/24} 14.Qc2 Nh5 15.Ng5 Rab8 16.Bc1 Nf6 17.Bb2 Rb6 18.Bxf6 gxf6 19.Nxe6 fxe6 20.Rac1 c5 21.Qd3 Qg7 22.Qh3 Qe7 23.Rfe1 Rc8 24.Red1 Kh8 25.Qd3 a5 ) 14.Bxf6 Qxf6 15.Qxc7 Bg4 16.Nd2 $1 Rb2 17.Nb3 a6 $6 {Deep HIARCS 15.3: 0.00/26} ( 17...Qg6 {Deep HIARCS 15.3: -0.53/22} 18.Qc3 Re2 19.Rfe1 Qxe4 20.Nd4 Rxe1+ 21.Rxe1 Qd5 22.Nc6 Qxa2 23.Qd4 Be6 24.Qxd6 Re8 25.h3 a5 26.Qd4 Qc2 27.Nxa5 Qc7 28.Nb3 Qd8 29.Rb1 Qd5 30.Qa4 Bd7 31.Qa5 Qxa5 32.Nxa5 ) 18.h3 Be2 19.Rfb1 Bd3 20.Rxb2 Qxb2 21.f3 Bc2 $1 22.Qa5 Bxb3 23.axb3 Qxb3 24.Qxa6 d5 25.exd5 Qxd5 26.Kh1 h6 27.Qe2 Qd4 28.Qd1 Qf6 29.Ra7 Re8 30.Qd2 Re6 31.Kg1 Qe5 32.Rd7 Qg3 33.Kf1 Qh2 34.Rd4 $1 {White loses 0.02 pawn per move (no errors), Black loses 0.05 pawn per move (3 inaccuracies).} 1/2-1/2
They played the Scotch, Goering Gambit and eventually the MCGP2024 offered a draw and I accepted on behalf of the Maia to save my time!
Ray