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Subject: WAC 230 ..solved by

Author: Mike Byrne

Date: 10:22:56 07/07/02


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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