Author: Eelco de Groot
Date: 22:19:42 03/25/05
Go up one level in this thread
On March 25, 2005 at 06:55:09, Martin Baumung wrote: >Hi, > >in another game between Shredder 9 and Gandalf 6.01 the following position came >up: > >[D]r1b1r1k1/1pn1qnbp/3p1pp1/pPp5/2PNPPP1/P1N1B1R1/3QB2P/3R3K w - - 0 21 > >Shredder played 21.Nf5! here with a rather convincing score of +2.47. Finding >the move after just 2 seconds (!). > >Any other engine going for this sacrifice? > I tried some variations on regular Pro Deo to see what works. Replacing null-move with [Search Technique = DEEPER] is for most styles a way to solve this faster. But the branching factor with limited hashtables is a lot worse with the older DEEPER search. Pro Deo default plays Nb3 or Nc2 here. New Pro Deo Betazoid T5m personality, also known as 'Jaws 0.1', is like a fish in the water in this position and reaches a search efficiency of 97.5%. It is not so remarkable that it can find Nf5 but it does not use too aggressive settings I hope and also "regular" null-move. Heavily borrowed from Albert's settings, and Dieter Eberle's e3. No idea how good this plays games as it hasn't been tested yet. Celeron 500 MHz, 28Mb HT Betazoid T5m about Shredder offer. 00:00:00.5 -2,44 1 13 Ne6 Nxe6 00:00:00.5 -1,92 1 390 Nd5 Nxd5 exd5 cxd4 Qxd4 00:00:00.5 -1,78 1 407 Nc6 bxc6 bxc6 00:00:00.6 -1,23 1 441 f5 cxd4 Bxd4 00:00:00.6 -0,02 1 476 Nf5 gxf5 gxf5 00:00:00.6 0,71 1 629 Nb3 00:00:00.6 0,53 2 891 Nb3 Bd7 00:00:00.6 0,62 3 2269 Nb3 a4 Nc1 00:00:00.7 0,47 4 6276 Nb3 a4 Nc1 Bd7 00:00:00.7 0,62 4 8323 Nc2 f5 exf5 gxf5 Bf3 fxg4 00:00:00.9 0,58 5 24664 Nc2 b6 Bf3 Bb7 Rh3 00:00:01.3 0,58 6 54199 Nc2 b6 Bf3 Bb7 Na4 Rab8 00:00:02.5 0,60 7 149674 Nc2 b6 Bf3 Bb7 Rh3 Ne6 Nd5 Bxd5 00:00:04.0 0,58 8 298927 Nc2 b6 Bf3 Bb7 Na4 Rab8 Nxb6 Bxe4 00:00:08.6 0,60 9 806797 Nc2 b6 Bf3 Bb7 Rh3 Ne6 Nd5 Bxd5 exd5 Nf8 00:00:16.5 0,56 10 1711707 Nc2 b6 Bf3 Bb7 Ne1 Rad8 h3 Rc8 Kg1 00:00:29.5 0,57 10 3246540 Nb3 b6 Bf3 Rb8 Bf2 Bb7 Rh3 Ne6 Nc1 Ra8 00:00:31.7 0,62 10 3539398 Nf5 gxf5 gxf5 Kh8 b6 Na6 Bh5 Nb8 Qd5 00:00:50.0 1,03 11 5846791 Nf5 gxf5 gxf5 Kh8 b6 Na6 Bh5 Rf8 Rdg1 Rg8 Qd5 Nh6 Nb5 00:01:13.5 1,03 12 9188976 Nf5 gxf5 gxf5 Kh8 b6 Na6 Bh5 Rf8 Rdg1 Rg8 Qd5 Nh6 Nb5 00:02:19.6 1,00 13 18938565 Nf5 gxf5 gxf5 Kh8 b6 Na6 Bh5 Rg8 Qd5 00:04:30.4 1,00 14 39359577 Nf5 gxf5 gxf5 Kh8 b6 Na6 Bh5 Rg8 Bf3 00:10:52.8 0,96 15 97354570 Nf5 gxf5 gxf5 Kh8 b6 [Personality = Betazoid T5m] * Pro Deo 1.1 (February 2005) [Pawn Value = 100] [Knight Value = 101] [Bishop Value = 100] [Rook Value = 100] [Queen Value = 100] [My Queen = 101] [King Safety = 160] [Mobility = 120] [Pawn Structure = 110] [Passed Pawns = 100] [Pins = 101] [Bishop Pair = 101] [Chess Knowledge = 200] [Attractiveness = 110] [Attacking = 100] [Strength of Play = 100] [Draw Contempt Factor = 0.00] [Selective Search = 80] [Search Technique = NULLMOVE] [Engine Master = off] off [Engine Learner = off] off|on [Book Learner = off] off|passive|moderate|strong|aggressive [Position Learner = off] off|on [Extended Book Learner = off] off|read|write|read&write * [Pruning = MISC_25] * [Pruning = MISC_37] * [Pruning = MISC_40] * [Pruning = MISC_52] * [Pruning ? MISC_53] * [Pruning = MISC_66] * [Pruning = MISC_69] * [Pruning = MISC_78] * * [Center Control = 30] * [Bishop Mobility = 25] * [Right to Move = 75] * [Strong Squares = 128] * * [Pruning = MISC_02] * [Pruning = MISC_03] * [Pruning = MISC_39] * [Pruning = MISC_08] * [Pruning = MISC_12] * [Pruning = MISC_16] * [Pruning = MISC_22] * Slightly safer Selectivity [Blitz Time Control = 120] * use more time at blitz levels * [Pawn Pressure midg = 165] * weight pawn pressure middlegame [Pawn Pressure end0 = 140] * weight pawn pressure early endgame [Pawn Pressure end1 = 125] * weight pawn pressure endgame [Pawn Pressure end2 = 110] * weight pawn pressure simple endgame * [Knight Mobility = 88] * 88 [Double Pawns = 112] * 112 [Pawn Formation = 115] * 108 [Weak Pawns = 112] * 112 [Minimum Knight Mobility = 100] * 100 [Minimum Bishop Mobility = 100] * 100 [Passed Pawn King Tropism = 100] * king tropism to own passed pawns [Progressive Isolated Pawns = 100] * weight isolated pawns (new style) * [ANTI-GM = OFF] [EVALUATION = SMART] [Extensions (remaining)= 3] [Extensions (checks)= normal] * low|moderate|normal|strong|all [Extensions (captures)= 0]
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