Author: Ernest Bonnem
Date: 05:14:40 07/05/03
Go up one level in this thread
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...) ? 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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