Author: Steve Maughan
Date: 12:39:04 07/07/02
Go up one level in this thread
Mike, Is WAC 230 correct? If I remember corretly there was a discussion here a few months back that said that Rb4 was not such a forced win e.g. http://www.it.ro/ccc_search/ccc.php?art_id=163138 Regards, Steve >Through my years of testing WAC positions, WAC 230 has been the toughest with my >modified crafty's - my crafty's have never solved it (in a reasonable time)... >my latest version of modified crafty (so far unrelease) solves is < 1 minute on >a Dual P4 1.7Ghz > >[D] 2b5/1r6/2kBp1p1/p2pP1P1/2pP4/1pP3K1/1R3P2/8 b - - > > >Black(1): go >end-game phase > clearing hash tables > time surplus 0.00 time limit 10:00 (10:00) > nss depth time score variation (1) > 10 0.46 1.64 1. ... Rh7 2. Kf4 Rh3 3. f3 Rh1 4. > Ke3 Re1+ 5. Kd2 Rg1 6. Be7 Rg2+ 7. > Kc1 > 10-> 0.46 1.64 1. ... Rh7 2. Kf4 Rh3 3. f3 Rh1 4. > Ke3 Re1+ 5. Kd2 Rg1 6. Be7 Rg2+ 7. > Kc1 > 11 1.04 1.69 1. ... Rh7 2. Rb1 Bd7 3. f3 Rh5 4. > Be7 Be8 5. Rb2 Kd7 6. Bf6 a4 > 11-> 1.04 1.69 1. ... Rh7 2. Rb1 Bd7 3. f3 Rh5 4. > Be7 Be8 5. Rb2 Kd7 6. Bf6 a4 > 12 1.63 1.66 1. ... Rh7 2. Rb1 a4 3. Ba3 Bb7 4. > Rb2 Rh1 5. Bf8 Rc1 6. Bb4 Rg1+ 7. Kf4 > Rg2 <HT> > 12-> 1.63 1.66 1. ... Rh7 2. Rb1 a4 3. Ba3 Bb7 4. > Rb2 Rh1 5. Bf8 Rc1 6. Bb4 Rg1+ 7. Kf4 > Rg2 <HT> > 13 2.99 1.65 1. ... Rh7 2. Rb1 Bb7 3. f3 Rf7 4. > Ra1 Ba6 5. Rb1 a4 6. Rb2 Rf5 7. Kg4 > Kd7 <HT> > 13-> 3.24 1.65 1. ... Rh7 2. Rb1 Bb7 3. f3 Rf7 4. > Ra1 Ba6 5. Rb1 a4 6. Rb2 Rf5 7. Kg4 > Kd7 <HT> > 14 4.04 1.67 1. ... Rh7 2. Rb1 Bb7 3. f3 a4 4. Ba3 > Kd7 5. Rb2 Rh1 6. Rh2 Ra1 7. Bb2 Rf1 > 8. Kf4 > 14-> 4.08 1.67 1. ... Rh7 2. Rb1 Bb7 3. f3 a4 4. Ba3 > Kd7 5. Rb2 Rh1 6. Rh2 Ra1 7. Bb2 Rf1 > 8. Kf4 > 15 9.99 1.68 1. ... Rh7 2. Rb1 Rh5 3. Kg4 a4 4. > Ba3 Kd7 5. Kf4 Bb7 6. f3 Ba6 7. Rb2 > <HT> > 15-> 11.16 1.68 1. ... Rh7 2. Rb1 Rh5 3. Kg4 a4 4. > Ba3 Kd7 5. Kf4 Bb7 6. f3 Ba6 7. Rb2 > <HT> > 16 20.80 1.77 1. ... Rh7 2. Rb1 Bb7 3. Ra1 Ba6 4. > Ba3 a4 5. Bb2 Bb5 6. f3 Kd7 7. Rb1 > Rh5 8. Kf4 <HT> > 16 40.27 2.14 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. > Ba3 c3 5. Rb1 Kc4 6. Rc1 Kxd4 7. f4 > Bd7 8. Bb4 c2 9. Ba3 Kc3 10. f5 > (2) 16-> 40.27 2.14 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. > Ba3 c3 5. Rb1 Kc4 6. Rc1 Kxd4 7. f4 > Bd7 8. Bb4 c2 9. Ba3 Kc3 10. f5 > 17 1:02 ++ 1. ... Rb4!! > 17 1:22 2.58 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. > Ba3 c3 5. Rb1 Kc4 6. Rc1 Kxd4 7. f4 > Kd3 8. Rd1+ Kc2 9. Rh1 b2 10. f5 d4 > 11. fxe6 > 17-> 1:23 2.58 1. ... Rb4 2. cxb4 a4 3. b5+ Kxb5 4. > Ba3 c3 5. Rb1 Kc4 6. Rc1 Kxd4 7. f4 > Kd3 8. Rd1+ Kc2 9. Rh1 b2 10. f5 d4 > 11. fxe6 > time=1:23 cpu=197% mat=1 n=106708755 fh=89% nps=1285028 > ext-> checks=3362292 recaps=55887 pawns=957944 1rep=74596 >thrt:1669 > predicted=0 nodes=106708755 evals=19420883 > endgame tablebase-> probes done=0 successful=0 > SMP-> split=1620 stop=242 data=10/64 cpu=2:43 elap=1:23
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