Author: Dusan Dobes
Date: 02:08:27 11/25/99
Go up one level in this thread
On November 24, 1999 at 22:42:52, yibing fan wrote:
>This position was rearched after white's 15th move in a game between
>Duz_Hotimirsky F I - Yudovich Mikhail M, 1948. Black to move. The game only
>lasted 20 moves.
>
>3r1rk1/p2q1ppp/2pb1n2/5b2/1nB5/2N1BN1P/PP2QPP1/R4RK1 b - - id=Duz_Hotimirsky F I
> - Yudovich Mikhail M ; bm=f5h3;
>
>All my top chess softwares failed to find the best move BxP(h3) within 8 hrs
>search on a PII 266. I tried crafty 16.6, Rebel 8, CM6000. Try yours! It is a
>good position to keep your chess engine busy for whole Thanksgiving holidays!
Phalanx XXI finds it in 75 seconds on a pentium 150. There is a simple
trick that helps it to find those moves quickly: It probably evaluates
the line Bxh3 gxh3 Qxh3 as "perpetual, at least" (Qg4+ Kh1 Qh3+) that
is scored several decipawns better than just "draw".
Dusan
5 11 242 38803 Nb4-c2 Ra1-c1 Nc2xe3 Qe2xe3 Rf8-e8 Qe3-g5
5 12 330 51794 Nf6-d5 Nc3xd5 Nb4xd5 Bc4xd5
5 17 482 73093 Rf8-e8 !
5 30 586 90800 Rf8-e8 Ra1-c1 Nf6-d5 Nc3xd5 Nb4xd5 Bc4xd5
Pc6xd5 Nf3-d4 Bf5-e4
5 -> 0:06.15 95716 2 turns
6 15 1172 192494 Rf8-e8 Ra1-c1 Nf6-d5 Nc3xd5 Pc6xd5 Bc4-b5
6 19 1755 285165 Nf6-d5 Nc3xd5 Nb4xd5 Bc4xd5 Pc6xd5 Nf3-d4
Bf5-e4
6 24 2105 338625 Nb4-c2 !
6 26 2395 401931 Nb4-c2 Ra1-d1 Rf8-e8 Nf3-g5 Nc2xe3 Pf2xe3
6 -> 0:26.88 453305 2 turns
7 15 3879 643809 Nb4-c2 Ra1-d1 Rf8-e8 Nf3-g5 Re8-e7 Bc4-a6
Nc2xe3 Pf2xe3
7 20 7462 1215988 Bf5xh3 !
7 45 9812 1621947 Bf5xh3 Pg2xh3 Qd7xh3
7 -> 1:43.82 1731750 1 turn
8 49 26690 4185081 Bf5xh3 Rf1-d1 Qd7-g4 Nf3-e1 Rf8-e8
8 -> 5:15.99 4970813 0 turns
9 60 66848 10748647 Bf5xh3 Pg2xh3 Qd7xh3 Rf1-e1 Nf6-g4
9 -> 13:10.38 12954037 0 turns
10 83 271066 45426260 Bf5xh3 Pg2xh3 Qd7xh3 Ra1-d1 Nf6-g4 Rd1xd6
Ng4xe3
10 -> 47:17.12 47872452 0 turns
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