Author: chandler yergin
Date: 19:22:10 10/20/05
Posted by Drexel,Michael (Profile) on October 19, 2005 at 15:17:59: In Reply to: Re: Huge Bug in Fritz 9 (Engine) posted by Eduard Nemeth on October 19, 2005 at 04:11:43: No, this position was created by me yesterday evening to make it clear there exists a Bug in Fritz 9. I could create hundreds of them, the specific position doesn´t matter at all. While analysing an endgame position I got very strange scores. Fritz evaluated a position -2 which should have been evaluated at least -6. So I knew that it will likely drop pieces under certain circumstances and I created this position. This is not an original Root Position. [D]1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b Analysis by Fritz 9: A position was created; 5 moves have been made by White. It is now Black's turn to move. 5...Se5 6.Lc3 b5 7.Ta7 Kg8 8.Tc7 Te8 ³ (-0.34) Depth: 7/19 00:00:00 72kN 5...Se5 6.Lc3 b5 7.Ta8 Kh7 8.Ta5 Sd3 9.Ke3 ³ (-0.37) Depth: 8/19 00:00:00 169kN 5...Se5 6.Lc5 b5 7.Le7 Te8 8.Lf6+ Kh7 9.Kd2 Sbd7 10.Th1+ Kg6 ³ (-0.38) Depth: 9/28 00:00:00 490kN 5...Se5 6.Lc3 b5 7.Tb1 Kh7 8.La1 Sa6 9.Lc3 Kg6 10.Th1 ³ (-0.38) Depth: 10/26 00:00:00 1234kN 5...Se5 6.Lc3 b5 7.Ta7 Sa6 8.Kf1 c5 9.Ke2 Kg8 10.Tb7 Sc7 ³ (-0.38) Depth: 11/29 00:00:01 2285kN 5...Se5 6.Lc3 b5 7.Th1+ Kg8 8.Tb1 Td3 9.La1 Sbd7 10.Tb4 Kf7 11.Lb2 ³ (-0.40) Depth: 12/30 00:00:04 6291kN 5...Se5 6.Lc3 b5 7.Th1+ Kg8 8.Tb1 Kf7 9.La5 Td3 10.Lc7 Sbd7 11.Tb4 Kg6 ³ (-0.41) Depth: 13/40 00:00:11 15607kN 5...Se5 6.Lc3 b5 7.Th1+ Kg8 8.Tb1 Kf7 9.Tf1+ Ke6 ³ (-0.43) Depth: 14/38 00:00:30 42044kN 5...Se5 6.Lc3 b5 7.Th1+ Kg8 8.Tb1 Kf7 9.Tf1+ Ke6 ³ (-0.43) Depth: 14/46 00:01:27 121127kN Making this an original Root position we have: [D]1n1r3k/1p1n4/2p5/8/8/2B5/4K3/R7 b - - 0 2 Analysis by Shredder 8: 1. -+ (-5.11): 2...Kg8 3.Kd2 c5 4.Rh1 Kf7 5.Ba5 Rc8 6.Kc2 b6 7.Be1 2. -+ (-5.04): 2...Kh7 3.Kd2 b5 4.Ba5 Re8 5.Rf1 Ne5 3. µ (-0.92): 2...Ne5 3.Bxe5+ Kh7 4.Ra7 Kg6 5.Rxb7 Nd7 6.Bc3 Kf5 7.Rc7 4. +- (3.96): 2...Nf6 3.Bxf6+ Kg8 4.Bxd8 Na6 5.Rf1 b5 6.Rf6 Nb4 7.Bb6 Kg7 (, MyTown 20.10.2005)
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