Hi,
now the Saitek/Mephisto "Chess Challenger" tuned to 32Mhz has to play the Millenium "The King Performance". With close to 390 CElo less (that's about 1 to 9 odds), the "Challenger" deserves its name and won't be much more than a sparring partner
.
The first game is an endurance test for both, lasting 88 moves. Not really worth the replay, you can save your time.
The second one is more interesting, a shorter one, and the Chess Challenger playing as Black castles long. That is an opportunity for the H8 bug to occur later on, and it actually happened! I was immediately alerted, as the Chess Challenger moved instantly its Rook from the h8 square after an ennemy move it had little chances for having pondered about it. Bingo, the move is a mistake. The Chess Challenger was already dominated, therefore I doubt the outcome of this game would have not been a loss, anyway. No big an influence on the match, so.
For fun and for information, once the game has been completed, I set the position up and let the Chess Challenger move: it plays the same Rook move, instantly. No pondering could have been involved after a position setup, thus indeed a H8 bug occurrence. I also used my trick to identify the move it would have computed, assuming no H8 bug: setup the position one half move before and White to move; make the White move obvious or forced, enable the rotating display of variation to ply2 (+rd:2) and let the Chess Challenger think the appropriate time.
In this case, I used this position:
with a honey-pot Queen to be captured. White move is of course NxQ displayed as ply 1; and ply 2 displayed by the thinking Chess Challenger is Nf5 instead of Rg8.
First time the H8 bug appears during the 64-cup (18 games played so far by either Chess Challenger, standard or tuned; and two more games to come, as the standard device will play quarter-final games; and is assumed not to survive these).
[Event "The 64-cup"]
[Site "?"]
[Date "2023.11.20"]
[Round "8th_final"]
[White "Mephisto Chess Challenger 32Mhz (lv B1)"]
[Black "Millenium The King Performance (lv N-5)"]
[Result "0-1"]
[WhiteElo "2138"]
[BlackElo "2527"]
[EventDate "2023.09.26"]
[ECO "D01"]
[PlyCount "176"]
1.d4 Nf6 2.Nc3 d5 3.Bg5 Bf5 4.e3 {Out of book} 4...Nbd7 5.Bd3 Bg6 6.Nf3 e6 {Out of book} 7.O-O Bh5 8.Bf4 Bd6 9.Bxd6 cxd6 10.Nb5 O-O 11.Re1 a6 12.Na3 Qb6 13.Rb1 e5 14.Be2 Rfe8 15.c3 Bg6 16.Nc2 Rac8 17.a3 h6 18.Rf1 Bh7 19.Re1 Re7 20.Nd2 a5 21.Nf3 Qc6 22.Ra1 Qa4 23.e4 dxe4 24.Nd2 Nb6 25.dxe5 dxe5 26.Ne3 Qc6 27.Qb3 a4 28.Qb5 Qxb5 29.Bxb5 Bg6 30.Rad1 Bh5 31.Nf5 Re6 32.Be2 Bg6 33.Ne3 Rec6 34.Ndf1 Rc5 35.Rd6 Nbd5 36.Bg4 Ra8 37.Bf5 Nf4 38.Bxg6 fxg6 39.Nd2 Rc7 40.Nd1 Nd3 41.Re3 Ne8 42.Rd5 Nf4 43.Rxe5 Nf6 44.Nxe4 Ng4 45.Rb5 Nxe3 46.Nxe3 Rd8 47.Nc5 Re7 48.Kf1 Re5 49.Ra5 Rd2 50.Rxa4 Nxg2 51.Nc4 Rd1+ 52.Kxg2 Rg5+ 53.Kf3 Rxc5 54.Ke2 Rd7 55.Ne3 Rb5 56.Rb4 Rxb4 57.axb4 Kf7 58.c4 Rd4 59.b3 Rh4 60.Nf1 Ke6 61.Ke3 Rh3+ 62.f3 Ke5 63.b5 g5 64.c5 Kd5 65.c6 bxc6 66.bxc6 Kxc6 67.Kf2 Kc5 68.Kg2 Rh4 69.Ne3 Rb4 70.Nf5 Rb7 71.Kg3 Kd5 72.Kg4 Ke5 73.Ng3 Rxb3 74.Ne4 Kd4 75.Nd6 Ke3 76.Ne4 Rb1 77.Ng3 g6 78.Ne4 Rg1+ 79.Ng3 Rg2 80.f4 gxf4 81.Kh3 Rxg3+ {King Performance announces mate in 8} 82.hxg3 f3 83.g4 f2 84.Kg2 Ke2 85.Kg3 f1=Q 86.g5 Qf3+ 87.Kh4 Kf2 88.gxh6 Qh5# 0-1
[Event "The 64-cup"]
[Site "?"]
[Date "2023.11.20"]
[Round "8th_final"]
[White "Millenium The King Performance (lv N-5)"]
[Black "Mephisto Chess Challenger 32Mhz (lv B1)"]
[Result "1-0"]
[WhiteElo "2527"]
[BlackElo "2138"]
[EventDate "2023.09.26"]
[ECO "D00"]
[PlyCount "129"]
1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.dxe5 Qxd1+ {Out of book} 5.Kxd1 Nc6 6.Nxe4 Bf5 7.Ng3 O-O-O+ 8.Bd2 Bd7 9.f4 g5 10.Bd3 Bg4+ 11.Kc1 gxf4 12.Bxf4 Bg7 13.h3 Be6 14.Nf3 Nb4 15.Be4 Bd5 16.Re1 Bh6 17.Bxh6 Nxh6 18.a3 Nc6 19.Bxd5 Rxd5 20.Nh5 Rd7 21.b3 Rg8 $6 {H8 bug, played instantly, enables an ennemy Knight fork on Rooks. Computed move should have been Nf5. That's 160 centipawns loss according to HIARCS 15.2 depth 23:} ( 21...Nf5 {HIARCS 15.2: +1.93\23} ) 22.Nf6 {HIARCS 15.2: +3.53\23} 22...Rxg2 23.Nxd7 Kxd7 24.Rf1 Re2 25.Kb2 Nf5 26.Rad1+ Ke7 27.Rfe1 Rg2 28.Rd3 Ke6 29.h4 h6 30.Re4 Nfe7 31.b4 Kf5 32.Re1 a6 33.Rd7 Rf2 34.Ng1 Ke6 35.Rxc7 b5 36.Ne2 Rf5 37.Rb7 Nd5 38.Ra7 Rxe5 39.Rxa6 Kd7 40.Rd1 Kc7 41.Nd4 Nb6 42.Nxc6 Kxc6 43.Ra7 f5 44.Rf7 h5 45.Rd8 Re3 46.Rxf5 Nc4+ 47.Kb1 Kc7 48.Rd3 Nxa3+ 49.Ka2 Nc4 50.Rxe3 Nxe3 51.Rxb5 Kd6 52.Kb3 Nd5 53.Rxd5+ $1 {smart simplification} 53...Kxd5 54.b5 Ke6 55.Kb4 Kd7 56.Kc5 Kc8 57.Kc6 {King Performance announces mate in 11} 57...Kd8 58.b6 Kc8 59.b7+ Kd8 60.b8=Q+ Ke7 61.Qf4 Ke6 62.Qg5 Kf7 63.Kd7 Kf8 64.Ke6 Ke8 65.Qe7# 1-0
MfG,
Tibono
20.11.2023, 16:38
Baum-Darstellung