Author: Pete Galati
Date: 18:30:46 02/26/01
Go up one level in this thread
On February 26, 2001 at 17:08:51, Sune Larsson wrote: > > [D]4b3/5k2/4p1p1/3pP2p/2pP1P1P/2P5/6N1/2K5 w - - 0 1 > > Burn-Alekhine Karlsbad 1911 > > > Amos Burn's only victory over Alekhine, in a good knight versus bad bishop > ending, is virtually a walk-over. The game went like this: > > 1.Kb2 Ba4 2.Ne3 Ke7 3.Ka3 Bc6 4.Kb4 Kd7 5.Ka5 Kc7 6.Nc2 Kb7 7.Nb4 Bd7 > 8.Na6 Be8 (if 8.-Bc8 9.Nc5+ and the king penetrates) 9.Nc5+ Kc6 10.Nxe6 > and white won. > > Test1: The above position. This is won for white and your program should > give white a big +score. Though we may dream about the day when > +9.99 pops up...;) > > > Test2: Exchange the bad bishop on e8 for a better one on e7. This position > is a draw and your program should evaluate it close to 0.00. > The new position below: > > > [D]8/4bk2/4p1p1/3pP2p/2pP1P1P/2P5/6N1/2K5 w - - 0 1 > > > Sune Since there were 2 positions, I ran them through Comet with a batch file. The moves ended up being King moves in different directions. Comet searched each positions for 30 minutes, but as you can see arrived at these positions a lot sooner than that. Comet V B.28 Stil: selective search Hash-Tab:64593K Datei: sunetest Mon Feb 26 19:19:34 2001 01: score: +0.76 Nodes/Sec: 266524 [18] c1b2 in 4:33 [16] 02: score: -0.50 Nodes/Sec: 229113 [18] c1d1 in 0:01 [10] Comet liked it's chances with Black having the trapped Bishop MUCH better. It searched out to a depth of 18 with both positions. Pete Comet-B.28 Mon Feb 26 19:19:14 2001 depth score sec nodes pv <== level <== 14 <== get <== sp 1. +0.34 0 10 g2e3 2. +0.20 0 73 g2e3 e8a4 3. +0.48 0 266 g2e3 e8a4 c1d2 4. +0.40 0 452 g2e3 e8a4 c1d2 f7e7 4. +0.40 0 716 g2e3 e8a4 c1d2 f7e7 5. +0.42 0 1276 g2e3 e8a4 c1d2 f7e7 d2e2 5. +0.47 0 2241 g2e1 e8a4 e1f3 f7e7 f3g5 5. +0.47 0 2419 g2e1 e8a4 e1f3 f7e7 f3g5 6. +0.47 0 4404 g2e1 e8a4 e1f3 f7f8 f3g5 f8e7 6. +0.47 0 5751 g2e1 e8a4 e1f3 f7f8 f3g5 f8e7 7! +0.74 0 8387 g2e1 e8a4 e1f3 f7f8 f3g5 f8e7 c1d2 7? +0.74 0 9059 g2e1 e8a4 e1f3 f7f8 f3g5 f8e7 c1d2 7. +0.74 0 12190 g2e1 e8a4 e1f3 f7f8 f3g5 f8e7 c1d2 8. +0.74 0 20801 g2e1 e8a4 e1f3 f7e7 f3g5 a4c6 c1d2 8. +0.74 0 28171 g2e1 e8a4 e1f3 f7e7 f3g5 a4c6 c1d2 9. +0.74 0 52349 g2e1 e8c6 e1f3 c6a4 f3g5 f7e7 c1d2 9. +0.74 0 71428 g2e1 e8c6 e1f3 c6a4 f3g5 f7e7 c1d2 10. +0.80 0 141914 g2e1 e8c6 e1f3 c6a4 f3g5 f7e7 c1d2 10. +0.80 0 180126 g2e1 e8c6 e1f3 c6a4 f3g5 f7e7 c1d2 11. +0.72 1 285143 g2e1 e8c6 e1f3 c6a4 f3g5 f7e7 c1d2 11. +0.72 1 384263 g2e1 e8c6 e1f3 c6a4 f3g5 f7e7 c1d2 12. +0.70 2 733007 g2e1 e8a4 e1f3 f7e7 c1d2 a4b3 d2e2 12. +0.72 9 2413169 c1d1 f7f8 d1e2 e8c6 e2e3 c6e8 g2e1 12. +0.72 9 2452758 c1d1 f7f8 d1e2 e8c6 e2e3 c6e8 g2e1 13. +0.70 14 3775712 c1d1 f7f8 d1e2 e8c6 e2e3 f8e8 g2e1 13. +0.71 16 4189414 g2e1 e8a4 e1f3 a4b3 f3g5 f7e7 c1d2 13. +0.71 19 5011767 g2e1 e8a4 e1f3 a4b3 f3g5 f7e7 c1d2 14. +0.74 25 6717473 g2e1 e8a4 e1f3 f7e7 f3g5 a4e8 g5h7 14. +0.74 39 10246947 g2e1 e8a4 e1f3 f7e7 f3g5 a4e8 g5h7 15. +0.75 49 12838116 g2e1 e8a4 e1f3 f7e7 f3g5 a4c6 g5h7 15. +0.75 64 16487964 g2e1 e8a4 e1f3 f7e7 f3g5 a4c6 g5h7 16. +0.74 90 23768501 g2e1 e8a4 e1f3 f7e7 f3g5 a4d7 c1d2 16. +0.75 272 72202350 c1b2 e8a4 g2e3 f7e7 16. +0.75 277 73251104 c1b2 e8a4 g2e3 f7e7 17. +0.82 409 105683633 c1b2 f7f8 b2a3 f8e7 g2e1 e7d7 e1f3 17. +0.82 484 123399258 c1b2 f7f8 b2a3 f8e7 g2e1 e7d7 e1f3 18. +0.76 802 206150734 c1b2 f7e7 b2a3 e7d7 g2e1 d7c7 a3b4 18. +0.76 1800 479778058 c1b2 f7e7 b2a3 e7d7 g2e1 d7c7 a3b4 ==> My Move: c1b2 in 30:00 ==> c1b2 in 4:33 [16] <== get <== sp 1. -0.30 0 26 c1d2 2. -0.33 0 74 c1d2 e7a3 3. -0.07 0 262 c1d2 e7d8 d2e3 4. -0.41 0 942 c1d1 e7d8 d1d2 d8a5 4. -0.41 0 960 c1d1 e7d8 d1d2 d8a5 5. -0.21 0 3130 c1d1 f7e8 d1d2 e8d7 d2e3 6. -0.34 0 5719 c1d1 f7e8 d1d2 e7d8 d2e3 d8a5 e3d2 6. -0.34 0 7300 c1d1 f7e8 d1d2 e7d8 d2e3 d8a5 e3d2 7. -0.34 0 13578 c1d1 f7e8 d1d2 e7d8 d2e3 d8a5 e3d2 7. -0.34 0 18702 c1d1 f7e8 d1d2 e7d8 d2e3 d8a5 e3d2 8? -0.48 0 20296 c1d1 f7e8 d1d2 e7d8 d2c2 e8d7 c2d2 8! -0.48 0 43738 c1d1 f7e8 d1d2 e7d8 d2c2 e8d7 c2d2 8. -0.48 0 43738 c1d1 f7e8 d1d2 e7d8 d2c2 e8d7 c2d2 9. -0.37 0 75257 c1d1 e7d8 d1d2 f7f8 d2c2 f8e7 g2e1 9! -0.35 0 97379 c1c2 f7e8 c2d2 9. -0.28 0 102219 c1c2 e7d8 c2d1 f7e8 d1e2 e8e7 g2e3 9. -0.28 0 122352 c1c2 e7d8 c2d1 f7e8 d1e2 e8e7 g2e3 10? -0.42 0 136064 c1c2 e7d8 c2d1 f7e8 d1d2 e8d7 d2c2 10. -0.52 1 239228 c1c2 e7d8 c2d1 f7e8 d1d2 e8d7 d2e2 10. -0.50 1 280484 c1d1 e7d8 d1e1 f7e8 e1e2 e8d7 e2d2 10. -0.50 1 288581 c1d1 e7d8 d1e1 f7e8 e1e2 e8d7 e2d2 11. -0.50 2 457874 c1d1 e7d8 d1e1 f7e8 e1e2 e8d7 e2d2 11. -0.50 2 567739 c1d1 e7d8 d1e1 f7e8 e1e2 e8d7 e2d2 12. -0.48 6 1256729 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 12. -0.48 7 1459007 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 13. -0.48 12 2649423 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 13. -0.48 15 3220305 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 14. -0.48 28 6131879 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 14. -0.48 35 7576424 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 15. -0.48 73 15481245 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 15. -0.48 89 19660020 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 16. -0.48 153 34252485 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 16. -0.48 203 45438814 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 17. -0.48 354 79724090 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 17. -0.48 508 119490162 c1d1 e7d8 d1d2 f7e8 d2e3 e8d7 e3e2 18. -0.50 1091 251644444 c1d1 f7f8 d1e1 f8e8 e1f2 e8d7 f2e1 18. -0.50 1800 412433175 c1d1 f7f8 d1e1 f8e8 e1f2 e8d7 f2e1 ==> My Move: c1d1 in 30:00 ==> c1d1 in 0:01 [10] <== quit
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