Author: Pete Galati
Date: 13:31:40 02/28/01
Go up one level in this thread
On February 28, 2001 at 14:33:56, Sune Larsson wrote: > > [D]3r4/7p/Rp4k1/5p2/4p3/2P5/PP3P1P/5K2 b - - 0 1 > > This is Tarrasch-Rubinstein, San Sebastian 1911. > Black is a pawn down and the b6 pawn is under attack. Passive > defence with 1.-Rd6 or 1.-Rb8 is doomed to failure. Rubinstein > grasps his only chance: To mobilize his rook and king. > Activity is vital in rook endings. > > 1.-Rd2! 2.Rxb6+ Kg5 3.Ke1 [3.a4 f4 4.a5 f3! is more than welcome to black.] > 3.-Rc2 4.Rb5 Kg4! 5.h3+ Kxh3 6.Rxf5 Rxb2 and black drew without effort. > > > Test: Big + for your program if it chooses 1.-Rd2! combined with > activating the king. > > Thumbs down if it chooses passive defence with 1.-Rd6 or 1.-Rb8. > > Sune Can't say I understand Rook endings, but I would have personally protected that pawn. On the other hand, I consider getting the Rook to it's 7th rank pretty important. Comet being a somewhat defensive type program protected the pawn with Rb8, I don't understand protecting it from there. It looked at Rd6 for less than a second. Missing virtual instinct that Comet never comcidered Rd2 in 63 minutes? Pete Comet-B.28 Wed Feb 28 14:14:50 2001 depth score sec nodes pv 1. -1.09 0 524 d8d6 2. -1.29 0 1239 d8d1 f1e2 d1d6 3. -1.13 0 2088 d8d6 f1e2 g6g5 4. -1.27 0 4408 d8d6 f1e2 f5f4 a6a7 5. -1.19 0 8577 d8d6 f1e2 f5f4 a6a7 h7h5 5. -1.19 0 13449 d8d6 f1e2 f5f4 a6a7 h7h5 6? -1.33 0 24880 d8d6 c3c4 d6d3 a6b6 g6g5 6? -1.60 0 46206 d8d6 a2a4 d6f6 a4a5 h7h5 a5b6 f6b6 6. -1.52 0 56835 d8b8 a6a7 b8d8 a7e7 d8a8 f1e2 6. -1.52 0 60103 d8b8 a6a7 b8d8 a7e7 d8a8 f1e2 7! -1.39 0 89344 d8b8 a6a7 h7h5 a7d7 g6g5 c3c4 f5f4 7? -1.39 0 94703 d8b8 a6a7 h7h5 a7d7 g6g5 7. -1.39 0 154427 d8b8 a6a7 h7h5 a7d7 g6g5 8. -1.49 1 229414 d8b8 a6a7 h7h5 a7d7 f5f4 f1e2 g6f5 8. -1.49 1 390318 d8b8 a6a7 h7h5 a7d7 f5f4 f1e2 g6f5 9. -1.53 4 986673 d8b8 b2b4 g6g5 c3c4 g5g4 c4c5 b6c5 9. -1.53 6 1329508 d8b8 b2b4 g6g5 c3c4 g5g4 c4c5 b6c5 10. -1.62 9 2118690 d8b8 b2b4 g6g5 c3c4 g5f4 f1e2 h7h5 10. -1.62 12 2640299 d8b8 b2b4 g6g5 c3c4 g5f4 f1e2 h7h5 11? -1.76 16 3659060 d8b8 b2b4 g6g5 a2a4 g5f4 a4a5 b6a5 11! -1.76 25 5740872 d8b8 b2b4 g6g5 a2a4 g5f4 a4a5 b6a5 11. -1.76 25 5740872 d8b8 b2b4 g6g5 a2a4 g5f4 a4a5 b6a5 12? -1.90 29 6752140 d8b8 b2b4 g6g5 a2a4 g5f4 f1e2 e4e3 12! -1.90 50 11599752 d8b8 b2b4 12. -1.90 50 11599752 d8b8 b2b4 13. -2.00 72 16376436 d8b8 b2b4 g6g5 a2a4 g5f4 f1e2 h7h5 13. -2.00 115 26589116 d8b8 b2b4 g6g5 a2a4 g5f4 f1e2 h7h5 14. -1.97 209 48419407 d8b8 b2b4 g6g5 a2a4 f5f4 c3c4 g5g4 14. -1.97 268 61753448 d8b8 b2b4 g6g5 a2a4 f5f4 c3c4 g5g4 15. -2.06 484 110928992 d8b8 a2a4 g6g5 b2b4 b8b7 15. -2.06 657 152856778 d8b8 a2a4 g6g5 b2b4 b8b7 16. -2.00 1456 338702180 d8b8 f1e2 g6g5 e2e3 b6b5 a6c6 h7h5 16. -2.00 2074 489617066 d8b8 f1e2 g6g5 e2e3 b6b5 a6c6 h7h5 17. -2.00 3835 898480681 d8b8 f1e2 g6g5 e2e3 b6b5 a6c6 h7h5 ==> My Move: d8b8 in 63:55
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