Author: Vasik Rajlich
Date: 01:42:11 09/04/05
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On September 03, 2005 at 15:41:48, Mridul Muralidharan wrote: >[D]r2q3r/1b1k1pbp/p4np1/2BP1pN1/p1B5/P1Q5/1PP3PP/R3K2R w KQ - 0 19 > >My engine royally blows up when it comes to this position (arrived at a game >against some engine a long while ago). >I suspected excessive extensions , qsearch problems , eval inconsistencies , >bugs , etc. >Could not find any bugs and there were no obvious others problems ... the >position just kills the node count. >Analysed it with other engines and most if not all had similar problems. > >I have not done an actual position analysis of the position with a strong player >(that is tactics , positional aspects , etc - just analysed the stats that my >engine dumps for this pos). > >Any comments ? > >Thanks, >Mridul This reminds me of a funny position I saw the other day: [D] r1r3k1/1bq1bppp/p1npp1P1/2nB1N1Q/1p2P3/2N1B3/PPP2P1P/2KR2R1 b - - I was doing a q-search test which assumed that no q-search would go over 10k nodes. This one crashed it :-) Here is the ridiculous source game: [Event "Engine Games 003 Min + X Sec"] [Site "Internet"] [Date "2005.01.17"] [Round "?"] [White "Deep Fritz 8"] [Black "Fritz 8"] [Result "1-0"] [ECO "B89"] [WhiteElo "2578"] [BlackElo "2494"] [PlyCount "89"] [EventDate "2005.??.??"] 1. e4 c5 2. Nf3 e6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Bc4 a6 8. Qe2 Be7 9. Bb3 Qc7 10. O-O-O O-O 11. Rhg1 Nd7 12. g4 Nc5 13. Nf5 b5 14. Bd5 Bb7 15. g5 Rfc8 16. Qh5 b4 17. g6 hxg6 18. Rxg6 fxg6 19. Qxg6 Bf6 20. Bxc5 Qd7 21. Rg1 Rf8 22. Bxd6 Rae8 23. Na4 exd5 24. Nc5 Qxf5 25. exf5 Ne7 26. Qh5 Bc6 27. Ne6 Rf7 28. Bxe7 Rfxe7 29. Qh6 Rf8 30. h4 Bb7 31. Qg6 Rff7 32. Rg5 Rxe6 33. fxe6 Bxg5+ 34. Qxg5 Rf6 35. Qe5 Bc6 36. Qb8+ Kh7 37. e7 Rxf2 38. e8=Q Bxe8 39. Qxe8 Rf1+ 40. Kd2 Rf5 41. Qe6 Rh5 42. Qg4 Re5 43. Qxb4 Re4 44. Qb6 Ra4 45. h5 1-0 Vas
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