Author: Thorsten Czub
Date: 14:47:16 09/23/97
Go up one level in this thread
Shirov-test-position move 24.Bg5 !!: [Event "Shirov test-position"] [Site "Amsterdam Donner(6)"] [Date "1995.??.??"] [Round "?"] [White "Shirov, A (2695)"] [Black "Piket, J (2625)"] [Result "1-0"] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5 8. Qd2 Bb4 9. Rc1 h6 10. Bh4 O-O 11. Bd3 Re8 12. a3 Bxc3 13. bxc3 Qxa3 14. O-O e5 15. Nxe5 Nxe5 16. dxe5 Qc5 17. Kh1 Be6 18. e4 Nb6 19. f4 Bc4 20. Rf3 Bxd3 21. Rxd3 Qc4 22. Re1 Kh7 23. Rh3 Re6 24. Bg5 1-0 Dirk Frickenschmidt: Hiarcs6 didn't find the move overnight. Well, Fritz 5 found the idea in acceptable analysis time! (P133 with only 4Mb Hash after 3hours 50 minutes) I regard the critical position as a very useful test concerning the tactical abilities of a strong new new program (nothing more, nothing less). Remember: Fritz had to reach ply 16 to get the point. Please post your results here. Enrique Irazoqui: I tried with Rebel 9 beta on a P120/32. It finds Bf6 almost immediately, then it prefers Bg5 at ply 8.04, after 1' 25'', but it fails low at ply 10 and it plays a different move. Bg5 is found again at ply 12.01, 42' 45'' +1.21. Chris Whittington: I tried this on the release version of CSTal. We have this game in book, so CSTal would play Lf6 without any thought; so I turned the book off, and put it into infinite mode (PP200). It found Bf6 very fast, then after 25 seconds: Lg5 !! Kg8 f5 Rxe5 Bxh6 g6 fxg6 +1.90, 7 ply, 25 secs. The move was holding later with the score at +2.03 for 9 ply, and +2..41 failing high at 10 ply, then +2.80 on the 10 ply research. Do I get a beer for this ? :) Chris Hello ! I let my version of cstal run on my AMDk5/100 (~ P5/120 Level) output the sendinfo of this position. Also I exported it into PGN for Ed and maybe Bruce and others to follow. Here the sendinfo-data: 000:00 0000n/s d1 -0.84 f4f5 e6e5 h4d8 NULL 000:00 0000n/s d1 -0.76 h4g5 h7g8 g5d8 NULL 000:00 0000n/s d1 +0.01 h3g3 a7a5 d2d1 NULL 000:00 0000n/s d2 -0.10 h3g3 h7h8 h4f6 NULL 000:00 0000n/s d3 -0.32 h3g3 a8g8 d2c2 e6e8 e1d1 NULL 000:01 3310n/s d3 +0.00 d2c2 a8e8 e1a1 h7h8 NULL 000:02 2997n/s d4 -0.02 d2c2 e6e8 h4f2 a8d8 f2b6 a7b6 NULL 000:04 2715n/s d4 ? h4f6 g7f6 NULL 000:06 2347n/s d4 ? h4f6 a8e8 f4f5 e6f6 e5f6 NULL 000:08 2465n/s d5 ? h4f6 a8e8 NULL 000:11 2393n/s d5 +0.95 h4f6 g7f6 f4f5 f6e5 f5e6 c4e6 e1a1 a7a6 NULL 000:17 2291n/s d6 ? h4f6 g7f6 NULL 000:19 2232n/s d6 +0.95 h4f6 g7f6 f4f5 f6e5 f5e6 c4e6 e1a1 a7a6 NULL 001:01 1987n/s d6 ? h4g5 h7g8 f4f5 e6e5 g5h6 g7g6 f5g6 NULL 002:33 2017n/s d7 +2.12 h4g5 c4c5 f4f5 b6c4 d2c1 e6e5 g5h6 c5d6 f5f6 h7g8 NULL 004:15 2010n/s d8 +2.13 h4g5 c4c5 f4f5 b6c4 d2f4 e6e5 g5h6 h7g8 h6g7 NULL 013:13 2028n/s d9 ? h4g5 c4c5 NULL 023:27 2042n/s d9 ? h4g5 c4c5 f4f5 b6c4 d2f4 e6e8 e5e6 f7e6 f5f6 NULL Played h4g5 The key-move is found after 61 seconds and this makes Chris PPro200 2.44 times faster than my AMDK5/100. Please recognize the NPS. The score in the 9 ply research is 3.xy pawns ! I don't know why this is not reported in the sendinfo file, instead the ? is printed. Chris - a bug ?? Thanks Dirk for this nice test-position. :-) Maybe one day we visit you in Wuppertal and Chris gets all the beers and if you would have a cup of tea for me, this would be nice too. One question: don't you have a difficult position ?? Has anybody else a more difficult position ? It took more time to input the position than CSTal needed time to solve it. That is not acceptable ! :-) Please more difficult tasks. Enrique - one question: when is it possible to download the threads/posts OFFLINE ? Thanks to all. I hope we will never be disturbed heavily like in rgcc.
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