1)
b4!
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2kr3r/1p3pb1/pBnqp2p/P2p2p1/8/2PB4/1P3PPP/R2Q1RK1 w - - bm b4;
2)
Winning moves : 1.a8=Q or =R
3)
How much time to find 16. Bg5! (after 15...d5?) with a very good advantage ( >0.50) ?
From the match Polgar - Spassky (1993) Round 8.
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r2qrbk1/1bpn1p1p/p4np1/1p1pp3/3PP3/1PP2NNP/P1B2PP1/R1BQR1K1 w - - 0 16
4)
From the Chessbase site, a position with a lot of zugzwang :
Sting-SF 7 finds the solution in 20 to 30 sec :
Code: Select all
FEN: q7/7R/k7/1p6/1p6/1P2B3/7K/8 w - - 0 1
Sting-sf-7-x64:
...
44 00:29 383 996k 12 909k 0,00 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+ 4.Rg7 Qa8 5.Be3 Qb8 6.Bc5 Qa8 7.Rd7 Qg8+ 8.Kf1 Qb8 9.Kg2 Qg8+ 10.Kf1
45+ 00:30 402 134k 13 031k +0,08 1.Bd4
45+ 00:30 402 151k 13 030k +0,16 1.Bd4
45+ 00:31 407 159k 13 023k +13,77 1.Bd4
45 00:32 419 890k 13 021k +12,52 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+ 4.Rg7 Qa8 5.Kf2 Qb8 6.Kf3 Qf8+ 7.Ke4 Qa8+ 8.Ke3 Qb8 9.Kd3 Qa8 10.Rf7 Qb8 11.Kc2 Qh2+ 12.Kb1 Qh1+ 13.Ka2 Qg2+ 14.Bf2 Qa8 15.Rg7 Qb8 16.Bg1 Qa8 17.Bd4 Qb8 18.Rf7 Qh2+ 19.Kb1
46+ 00:32 420 989k 13 020k +12,64 1.Bd4
46+ 00:32 421 070k 13 018k +12,76 1.Bd4
46+ 00:34 449 832k 13 086k +47,98 1.Bd4
46 00:35 459 170k 13 100k +14,86 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+ 4.Rg7 Qa8 5.Kf2 Qb8 6.Ke3 Qe8+ 7.Kd3 Qa8 8.Rf7 Qb8 9.Kc2 Qh2+ 10.Bf2 Qb8 11.Kb1 Qa8 12.Ka2 Qb8 13.Rh7 Qa8 14.Kb2 Qb8 15.Bd4 Qa8 16.Ka1 Qb8 17.Rh6+ Ka5 18.Rh8 Qxh8 19.Bxh8 Kb6 20.Kb2 Kc6 21.Kc2 Kd5 22.Kd3 Ke6 23.Ke4 Kf7 24.Be5 Ke7 25.Kd5 Kd7 26.Bf4 Ke8 27.Ke4 Kf7 28.Kd4 Kg6 29.Kc5 Kf5 30.Bd6 Ke6 31.Kxb4 Kd7 32.Kxb5 Ke6 33.b4 Kd7 34.Ka6 Ke6 35.b5 Kf7 36.b6 Kg8 37.b7
47+ 00:35 459 523k 13 096k +14,98 1.Bd4
47+ 00:35 459 656k 13 094k +15,11 1.Bd4
47+ 00:35 460 274k 13 075k +61,43 1.Bd4
47 00:35 465 035k 13 058k +77,08 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+ 4.Rg7 Qa8 5.Kf2 Qb8 6.Ke3 Qa8 7.Kd2 Qb8 8.Kd3 Qa8 9.Rf7 Qb8 10.Kc2 Qh2+ 11.Bf2 Qb8 12.Kb1 Qa8 13.Ka2 Qb8 14.Rh7 Qa8 15.Kb2 Qb8 16.Bd4 Qa8 17.Ka1 Qb8 18.Rh6+ Ka5 19.Rh8 Qxh8 20.Bxh8 Kb6 21.Kb2 Zugzwang too : 1B1k4/3p4/1Kp5/PpP2p2/1PqP1P2/8/1P6/8 w - - bm a6;
6)
Stalemate theme, finds a draw score :
7)
Mate with the knight after some zugzwang
8)
Let's block the black king than bring the white king :
9)
Black is winning after 1...Bxh4! : 8/p7/5k2/pPp1p3/2P3Kb/8/8/3B4 w - - 0 2
10)
Draw combination by stalemate :
11)
Rxf5!
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4rb2/1p1q1ppk/p1n1p2p/2p1Pn2/3PNR2/2P2K2/P2QBP2/6R1 w - - bm Rxf5;
12)
White is winning after 1. Bxh7+! Kxh7 2. Ng5+! Kg8 3. Qe2! g6 4. Rh3!
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r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - - bm Bxh7;
13)
2 possible winning moves here : Qxd2! or Ng4!, hard for Stockfish.
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r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 19
