Author: David Dahlem
Date: 08:18:19 07/05/03
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On July 05, 2003 at 08:14:40, Ernest Bonnem wrote: >Thanks, Dave, the position you posted is indeed the FritzMark position : >same PVs and evals when you let Fritz 7 examine that position with fixed depth >10. > >Something else I've always wanted to know : what is the "formula" for FritzMark >(as a function of time obtained, kN/s, what else...) ? > > Hi Ernest I don't know the "formula". All i have is a Fritzmark.epd and this is the complete contents of that epd file: ; This seems to be the only important Testposition for Fritzmark. ; The time it takes till the engine reaches the end of ply 10 is measured. 1r5r/3b1pk1/p2p1np1/p1qPp3/2N1PbP1/2P2PN1/1PB1Q1K1/R3R3 b - - 0 1 ; These positions are evaluated up to ply 6: 1q2r3/2p1bpkp/5np1/8/5B1P/5QNK/3P1PP1/R7 w - - 0 1 r1b2rk1/1p2bppp/p4n2/4B3/1qBR4/2N5/P3QPPP/R5K1 w - - 0 1 r4rk1/5p2/p1b1pQpq/8/1B2P3/2NR4/PPP3PP/1K6 w - - 0 1 Regards Dave >On July 04, 2003 at 11:49:35, David Dahlem wrote: > >>On July 04, 2003 at 09:44:21, Ernest Bonnem wrote: >> >>>A few years ago somebody from Sweden (sorry, haven't kept the author's name or >>>the reference) gave the FritzMark position as : >>>1r5r/3b1pk1/3p1np1/p1qPp3/p1N1PbP1/2P2PN1/1PB1Q1K1/R3R3 b - - 0 1 >>> >>>I recently had a new look at it and compared with the FritzMark PVs given by >>>Fritz 7 : >>>1...Bb5 2.Bd3 a4 3.Rh1 Rbc8 4.Nd2 >>> ³ (-0.44) Depth: 6/23 00:00:00 84kN >>>1...Bb5 2.Bd3 a4 3.Rh1 Rbc8 4.Nd2 Rb8 >>> ³ (-0.50) Depth: 7/22 00:00:00 129kN >>>1...Rhc8! >>> ³ (-0.53) Depth: 7/25 00:00:01 234kN >>>1...Rhc8 2.Bd3 a4 3.Rh1 Bxg3 4.Kxg3 Bb5 5.Ne3 Bxd3 >>> ³ (-0.56) Depth: 7/25 00:00:01 248kN >>>1...Rhc8! >>> µ (-0.84) Depth: 8/28 00:00:02 486kN >>>1...Rhc8 2.Bd3 Bb5 3.g5 Bxg5 4.Rxa5 Qc7 5.f4 Bxf4 >>> µ (-0.84) Depth: 9/35 00:00:04 1169kN >>>1...Bb5! >>> µ (-0.88) Depth: 9/35 00:00:06 1418kN >>>1...Bb5 2.Bd3 Rbc8 3.Rxa5 Qc7 4.Rea1 Bxc4 5.Bxc4 Qxc4 6.Qxc4 Rxc4 7.Rxa6 Rb8 >>> µ (-0.75) Depth: 10/28 00:00:12 2979kN >>> >>>Obviously there is no black pawn on a4 and the corrected epd, with diagram, is : >>> >>>1r5r/3b1pk1/3p1np1/p1qPp3/2N1PbP1/2P2PN1/1PB1Q1K1/R3R3 b - - 0 1 >>> >>>Thus we indeed get the 65 possible black moves (FritzMark indication), but I >>>have 2 problems with the position : >>>1. The last FritzMark PV indicates 1...Bb5 2.Bd3 Rbc8 3.Rxa5 Qc7, >>>but 2 ...Rbc8 and 3 ...Qc7 are faulty moves >>>2. When you let Fritz 7 examine the position with fixed depth 10, you don't get >>>the same evals and PVs. >>> >>>So maybe the FritzMark position isn't the one above... >>>Can you find a better one, or has ChessBase told you something about it :-)) ? >> >>I have this position stored on my drive as the Fritzmark position. I don't >>remember where it came from. :-) >> >>[D]1r5r/3b1pk1/p2p1np1/p1qPp3/2N1PbP1/2P2PN1/1PB1Q1K1/R3R3 b - - 0 1 >> >>Dave
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