Author: Richard Pijl
Date: 01:24:35 12/20/02
Go up one level in this thread
On December 19, 2002 at 19:39:56, Roy Eassa wrote: >White to move & win >[d] 7k/5r2/6PK/6P1/8/8/5P1R/8 w - - 0 1 > >7k/5r2/6PK/6P1/8/8/5P1R/8 w - - 0 1 > >1.g7+! > > [1.Kh5 Rf4 only draws] > >1...Kg8 > > [1...Rxg7 2.Rh5 Kg8 > (2...Rf7 3.Kg6+ Kg8 4.Rh8+ +-) > 3.g6 Rd7 4.Ra5 +-] > >2.Rh3! Rf3 3.Rg3! Rxf2 > > [3...Rf4 4.Re3 Rh4+ 5.Kg6 Re4 6.Kf5 Rc4 7.Re7 +-] > >4.Ra3 Rh2+ 5.Kg6 Ra2 6.Rf3 Ra6+ 7.Rf6 Rb6 8.Kh6! Rb8 9.Rf8+ +- > > [9.g6 also works] 1.g7+ is found by the Baron on slow hardware (PII-500) in a few seconds and with a large score: ply time nodes score pv 4( 5)- 0 732 342 h6h5 f7f4 4( 5)& 0 777 343 h6h5 4( 5). 0 786 343 h6h5 5( 7)- 0 1394 313 h6h5 f7f4 5( 7)& 0 1436 314 h6h5 5( 7). 0 1445 314 h6h5 6( 8)& 0 2389 307 h6h5 f7f4 f2f3 h8g7 h2f2 f4d4 6(11). 0 2911 307 h6h5 f7f4 f2f3 h8g7 h2f2 f4d4 7( 9)+ 0 4196 337 h6h5 7(12)& 0 6155 336 h6h5 f7f4 7(14). 0 9130 336 h6h5 f7f4 8(11)& 0 11039 307 h6h5 f7f4 f2f3 h8g8 h2f2 g8g7 f2f1 f4d4 8(16). 0 21107 307 h6h5 f7f4 f2f3 h8g8 h2f2 g8g7 f2f1 f4d4 9(12)+ 0 25363 337 h6h5 9(12)& 0 27767 336 h6h5 f7f4 9(17). 0 34106 336 h6h5 f7f4 10(18)- 1 85539 306 h6h5 f7f4 10(18)& 1 89368 307 h6h5 10(18). 1 89377 307 h6h5 11(16)+ 1 103411 337 h6h5 11(19)& 1 112103 336 h6h5 f7f4 11(20). 2 196893 336 h6h5 f7f4 12(21)- 5 558198 306 h6h5 f7f4 12(21)& 5 585705 305 h6h5 f7f4 f2f3 h8g8 h2f2 g8f8 f2d2 f4f3 d2d8 f8g7 12(21)& 6 774807 336 g6g7 h8g8 h2h3 f7f3 h3g3 f3f2 g3e3 12(21). 6 774812 336 g6g7 h8g8 h2h3 f7f3 h3g3 f3f2 g3e3 13(22)+ 8 955446 366 g6g7 13(22)& 11 1393109 422 g6g7 h8g8 h2h3 f7d7 h3f3 d7g7 g5g6 g7a7 f3e3 13(22). 11 1405378 422 g6g7 h8g8 h2h3 f7d7 h3f3 d7g7 g5g6 g7a7 f3e3 14(23)& 14 1898574 421 g6g7 h8g8 h2h3 f7d7 h3f3 d7g7 g5g6 g7a7 f3e3 14(23). 15 2043566 421 g6g7 h8g8 h2h3 f7d7 h3f3 d7g7 g5g6 g7a7 f3e3 15(25)+ 21 2728001 451 g6g7 15(25)& 31 4122479 462 g6g7 h8g8 h2h3 f7f4 h3e3 f4h4 h6g6 h4e4 g6f5 e4d4 e3e7 d4d6 f2f4 g8h7 f5g4 d6g6 g7g8q h7g8 f4f5 g6g7 f5f6 15(25). 33 4388937 462 g6g7 h8g8 h2h3 f7f4 h3e3 f4h4 h6g6 h4e4 g6f5 e4d4 e3e7 d4d6 f2f4 g8h7 f5g4 d6g6 g7g8q h7g8 f4f5 g6g7 f5f6 16(26)& 44 6288925 462 g6g7 h8g8 h2h3 f7f4 h3e3 f4h4 h6g6 h4e4 g6f5 e4d4 e3e7 g8h7 f2f4 d4d6 e7c7 d6b6 c7a7 b6b5 16(26). 50 7190587 462 g6g7 h8g8 h2h3 f7f4 h3e3 17(27)& 76 11304120 463 g6g7 h8g8 h2h3 f7f4 h3e3 f4h4 h6g6 h4e4 g6f5 e4d4 e3e7 d4d6 f2f4 g8h7 f5e4 d6d1 e4e5 h7g8 17(28). 87 13116683 463 g6g7 h8g8 h2h3 f7f4 h3e3 18(29)& 158 24791255 463 g6g7 h8g8 h2h3 f7f4 18(29). 211 33264684 463 g6g7 h8g8 h2h3 f7f4 h3e3 19(30)+ 274 42844140 493 g6g7 19(31)& 459 71037649 551 g6g7 h8g8 h2h3 f7f4 h3e3 f4h4 h6g6 h4e4 g6f5 e4d4 e3e7 g8h7 f2f4 d4d6 f5e5 d6g6 f4f5 g6g5 e5f4 19(31). 520 80021040 551 g6g7 h8g8 h2h3 f7f4 h3e3 f4h4 h6g6 h4e4 g6f5 e4d4 e3e7 g8h7 f2f4 d4d6 f5e5 d6g6 f4f5 g6g5 e5f4
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