Author: Sune Larsson
Date: 13:57:47 03/15/01
Go up one level in this thread
On March 15, 2001 at 16:23:40, Robert Hyatt wrote: >On March 15, 2001 at 15:02:34, Robert Hyatt wrote: > >>On March 15, 2001 at 14:37:07, Sune Larsson wrote: >> >>> >>> [D]1R6/p3k1p1/7p/2b1pP2/P1r3P1/B7/7P/7K w - - 0 1 >>> >>> Pitschak-Foerder, Breslau 1930 >>> >>> >>> In this position white chose the timid but comfortable continuation >>> 1.Bxc5+ Rxc5 2.Rb7+ and in the end the result was a draw. >>> >>> In chess, time is money and white could cash in by gaining a vital >>> tempo. Maybe Herrn Pitschak was a victim of too much linear thinking >>> in the possible upcoming pawn ending?! Anyway, here goes! >>> >>> >>> 1.Rc8! Kd6 2.Rxc5! Rxc5 3.h4! (now the time has come for the farmer >>> boy to move) 3.-Kc6 (he must try to free himself) 4.Bxc5 Kxc5 >>> 5.g5 (I think white saw this position in his calculations but was >>> fooled by his own eyes.) 5.-hxg5 6.f6!! (yes!!) 6.-gxf6 7.h5! wins. >>> >>> Test: White to move and win by the above line. >>> >>> Sune >> >> >>After a reasonable amount of time, crafty sticks with the following (it likes >>this move from the get-go and never changes): >> >> 12 39.45 0.62 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 >> 4. h3 a5 5. Rc7+ Kd4 6. f6 Ra1+ 7. >> Kh2 Ra2+ 8. Kg3 Ra3+ 9. Kg2 e4 >> (2) 12-> 47.03 0.62 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 >> 4. h3 a5 5. Rc7+ Kd4 6. f6 Ra1+ 7. >> Kh2 Ra2+ 8. Kg3 Ra3+ 9. Kg2 e4 >> 13 1:05 0.60 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 >> 4. h3 e4 5. Re7 Kd4 6. f6 Ra1+ 7. Kh2 >> Ra2+ 8. Kg3 Ra3+ 9. Kg2 e3 >> (2) 13-> 1:51 0.60 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 >> 4. h3 e4 5. Re7 Kd4 6. f6 Ra1+ 7. Kh2 >> Ra2+ 8. Kg3 Ra3+ 9. Kg2 e3 >> 14 2:34 0.76 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 >> 4. h3 e4 5. Re7 Kd4 6. f6 Ra1+ 7. Kh2 >> Ra2+ 8. Kg3 Ra3+ 9. Kh4 a5 10. Rd7+ >> Kc3 >> (2) 14-> 3:51 0.76 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 >> 4. h3 e4 5. Re7 Kd4 6. f6 Ra1+ 7. Kh2 >> Ra2+ 8. Kg3 Ra3+ 9. Kh4 a5 10. Rd7+ >> Kc3 >> >>It's a bit more double-edged than trying to pick up the a pawn... >> >>too complicated for me right now. :) > > >After an hour, crafty came up with this: > > (2) 16-> 17:42 0.83 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 > 4. h3 a5 5. Rh7 e4 6. Rxh6 e3 7. Re6 > Kd4 8. f6 Ra2 9. Rd6+ Ke5 10. f7 Rf2 > 17 27:34 0.69 1. Rb7+ Kd6 2. Bxc5+ Kxc5 3. Rxg7 Rxa4 > 4. h3 e4 5. Re7 Ra1+ 6. Kh2 Kd4 7. > f6 Ra2+ 8. Kg3 Ra3+ <HT> > 17 51:27 ++ 1. Rc8!! > 17 67:29 1.47 1. Rc8 Kd6 2. Rxc5 Rxc5 3. h4 e4 4. > g5 hxg5 5. hxg5 e3 6. Kg2 Kd5 7. Bxc5 > Kxc5 8. f6 e2 9. fxg7 e1=Q 10. g8=Q > (3) 17-> 67:29 1.47 1. Rc8 Kd6 2. Rxc5 Rxc5 3. h4 e4 4. > g5 hxg5 5. hxg5 e3 6. Kg2 Kd5 7. Bxc5 > Kxc5 8. f6 e2 9. fxg7 e1=Q 10. g8=Q > (2) 18 76:15 1.37 1. Rc8 Kd6 2. Rxc5 Rxc5 3. h4 e4 4. > g5 hxg5 5. hxg5 e3 6. Kg2 Kd5 7. Bxc5 > Kxc5 8. f6 e2 9. f7 e1=Q 10. f8=Q+ > Kc4 11. Qxg7 > > >Not exactly a crushing win, but you got your move. :) Yes, and it was very nice to see that Crafty finally came up with 1.Rc8!! The evals in the final line look a bit strange to me but I'm sure there is some "technical" explanation to it. After 8.f6 e2 white plays 9.Kf2 and I would have expected evals like 8.72 or 9.99... :) Sune
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