Author: Steven J. Brann
Date: 19:49:41 07/12/01
Go up one level in this thread
On July 11, 2001 at 18:08:56, John Merlino wrote: >On July 11, 2001 at 12:52:30, Sune Larsson wrote: > >> >> [D]r5nr/pp3kpp/2pb4/3pn1P1/8/2N1B2B/PPP2P1P/2KRR3 w - - 0 20 >> >> IM Berg,Emanuel 2496 - GM Akesson,Ralf 2481 >> >> >> This is a position from today's 10th round in the SWE-ch. 19 year old >> Berg is a very gifted tactician. Here he chose 20.Nxd5!, got an advantage >> and won the game vs his more experienced opponent. It was from a e5-pushed >> Caro-Kann. >> >> Test: How long before your program finds and chooses 20.Nxd5! >> >> The whole game below. >> >> >>[Event "SM"] >>[Site "SWE"] >>[Date "2001.07.11"] >>[Round "10"] >>[White "Berg, Emanuel"] >>[Black "Akesson, Ralf"] >>[Result "1-0"] >>[ECO "B12"] >>[WhiteElo "2496"] >>[BlackElo "2481"] >>[PlyCount "61"] >>[EventDate "2001.07.11"] >> >>1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 f6 7. Nf4 Bf7 8. Qe2 >>fxe5 9. Qxe5 Nd7 10. Qe2 Qf6 11. g5 Qxd4 12. Nxe6 Bxe6 13. Qxe6+ Be7 14. Bh3 >>Qe5+ 15. Be3 Qxe6 16. Bxe6 Bd6 17. O-O-O Ke7 18. Bh3 Ne5 19. Rhe1 Kf7 20. Nxd5 >>cxd5 21. Rxd5 Rd8 22. Bc5 Nc4 23. Rd4 b6 24. Be6+ Kg6 25. Bxc4 bxc5 26. Re6+ >>Kxg5 27. Rdxd6 Nf6 28. Rc6 Rd7 29. Rxc5+ Kh4 30. Re3 Ng4 31. Re4 1-0 >> >>Sune > >Well, that was annoying. After a long think (almost 5 minutes), CM8000 came up >with Nxd5. Then, 14 seconds later, it switched to a move that it hadn't thought >"best" for over 4 minutes! <sigh> After that, it was a long time before it came >around again. > >So, if the time control and the hardware were JUUUUUST right.... > >Time Depth Score Positions Moves >0:00 1/4 1.08 5428 20. Ne4 Bb4 21. c3 dxe4 22. cxb4 >0:00 2/5 0.96 38290 20. Ne4 Bb4 21. Nd2 Ne7 22. f4 >0:01 2/6 0.98 74134 20. Ne4 Be7 21. Nd2 h6 22. gxh6 > Nxh6 23. f3 >0:03 3/7 0.98 198157 20. Ne4 Be7 21. Nd2 h6 22. gxh6 > Nxh6 23. f3 >0:10 3/8 0.74 658438 20. Ne4 Bb4 21. Nd2 Bxd2+ 22. Bxd2 > Nf3 23. Re3 Nxd2 24. Rxd2 Re8 >0:34 4/9 0.64 2422711 20. Ne4 Bb4 21. Nd2 h6 22. Bd4 > Bxd2+ 23. Rxd2 Nf3 24. Re6 hxg5 >0:45 4/9 0.74 3150143 20. Re2 h6 21. Ne4 Be7 22. Nc5 > Bxc5 23. g6+ Nxg6 24. Bxc5 Nf4 >1:55 5/10 0.49 8371693 20. Re2 h6 21. f4 Nc4 22. Rf1 Nxe3 > 23. Rxe3 g6 24. Be6+ Kg7 25. Ne2 > Ne7 >4:40 5/10 0.56 21322468 20. Nxd5 cxd5 21. Rxd5 Nc4 22. > Bc5 Bf4+ 23. Kb1 Kg6 24. Rd7 Rc8 > 25. Bxa7 Nd2+ 26. Ka1 Rxc2 27. > Rxb7 Bxg5 >4:54 5/10 0.61 22437955 20. Ne4 Bb4 21. Nd2 h6 22. gxh6 > Nxh6 23. Rg1 Bxd2+ 24. Bxd2 Nf3 > 25. Rg3 Nxd2 26. Rxd2 >8:38 6/11 0.60 39383091 20. Ne4 Bb4 21. Nd2 h6 22. gxh6 > Nxh6 23. Rg1 Ng8 24. Rg3 Nf6 25. > f4 >15:16 6/11 0.92 71501077 20. Nxd5 cxd5 21. Rxd5 Nc4 22. > Bf1 Nxe3 23. Rxe3 Bxh2 24. Rf5+ > Kg6 25. Bd3 Bb8 26. Rd5+ Kf7 27. > Rd7+ Kf8 28. Rf3+ Ke8 29. Rxg7 > >jm Hmmmm, hardware and time control just right? CM8K with my custom personality on a 933 PIII finds the solution in 3:49. It's interesting that it did so after evaluation of 29MM positions when your analysis evaluated 71MM positions. Then on further reflection, thinks the position is improved by straying from 21. Bf1. Time Depth Score Positions Moves 0:00 1/6 1.51 65577 1. Ne4 Bb4 2. Nd2 Ne7 3. Bf4 Bxd2+ 4. Rxd2 0:01 1/7 1.46 188117 1. Ne4 Bb4 2. Bd2 Bxd2+ 3. Nxd2 Re8 4. f4 Ng6 0:05 1/8 1.24 604782 1. Ne4 Bb4 2. Bd2 Bxd2+ 3. Nxd2 Re8 4. f4 Ng6 5. Rxe8 Kxe8 0:06 1/8 1.31 768481 1. Re2 h6 2. Ne4 Be7 3. g6+ Nxg6 4. Nc5 Nf4 5. Bxf4 Bxc5 0:21 2/9 1.09 2435778 1. Re2 h6 2. Ne4 Be7 3. Nc5 Bxc5 4. Bxc5 hxg5 5. Re3 g4 0:37 2/9 1.54 4226043 1. Nxd5 cxd5 2. Rxd5 Nc4 3. Rf5+ Kg6 4. Bd4 Rf8 5. Re6+ Kh5 6. Bxg7 Rxf5 7. Bxf5 Bf4+ 8. Kb1 Nd2+ 9. Ka1 Kxg5 1:17 3/10 1.67 9319081 1. Nxd5 cxd5 2. Rxd5 Nc4 3. Bc5 Bf4+ 4. Kb1 Kg6 5. Re6+ Kh5 6. f3 Kh4 7. Bg4 Bxh2 8. Re4 Nb6 9. Be6+ Kh5 3:49 4/11 1.61 29029137 1. Nxd5 cxd5 2. Rxd5 Nc4 3. Bf1 Nxe3 4. Rxe3 Bxh2 5. Rd7+ Kg6 6. Bd3+ Kxg5 7. Rxg7+ Kf6 8. Rxb7 h5 9. Bc4 15:29 5/12 1.90 122865927 1. Nxd5 cxd5 2. Rxd5 Rd8 3. Bc5 Bxc5 4. Rxd8 Be7 5. Rd4 Bxg5+ 6. f4 Nf3 7. Rd7+ Kf8 8. Re4 Ng1 9. Be6 Steve
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