Author: Roy Eassa
Date: 13:07:06 09/12/01
Go up one level in this thread
[D] rnb1kb1r/1pq2p1p/p4P2/4pP2/2B5/2NQ4/PPP2p1P/2KR3R w kq -
White wins more variations, but the sacrifice still seems to be a draw with best
play by Black:
1.Bxf7+!? Kxf7 2.Qd5+ Kxf6
[2...Ke8 3.f7+ Ke7 4.f6+ Kxf6 5.Qf3+!
(5.Ne4+ Ke7 6.Nd6
(6.Qd2 Qb6 7.Nd6
(7.Qg5+ Kxf7 8.Rhf1 Bh6 9.Rxf2+ Qxf2
(9...Ke8 10.Rd8+ Qxd8 11.Qxh6 Qd4 12.Qf6 Qxe4 13.Qxh8+ Kd7 14.Rd2+
Kc6
(14...Ke7)
15.Qxc8+ Kb6
(15...Kb5? 16.a4+! Kb6
(16...Kxa4 17.Qc5 Qb4 18.Qxe5 Qxd2+ 19.Kxd2 Nc6 20.Qc5 Nb4
21.b3+ Ka3 22.Kc1!
(22.Qa5+ also wins)
22...b5 23.c3 a5 24.cxb4 a4 25.bxa4 Kb3 26.Qd5++-; 17.a5+!
Kxa5 18.Qc5+ b5 19.Qc7+ Ka4 20.b3+ Kb4 21.Kb2 Nc6 22.c3+ Kc5 23.b4+ mates;
16.Rd6+ Nc6 17.Qxa8= and Black should take the perpetual check;
10.Nd6+ Ke6 11.Qxh6+ Qf6 12.Qh3+ Ke7 13.Nxc8+ Ke8 and the best
White can do is a perpetual check;
7...Bh3! 8.Qg5+ Ke6 9.Ne4 Nd7 10.Qh5 Qe3+ 11.Kb1 Bf5 12.Ng3 Bxc2+
13.Kxc2 Nf6 14.Qf5+ Kxf7 15.Rhf1 Qf4 16.Rd7+
(16.Qd3 Rc8+ 17.Kb1 b5-+)
16...Be7-+;
6...Bh6+ 7.Kb1 Bf4 8.Qg2 Rf8-+ Black seems to survive the attack: 9.Qxf2
(9.Rhf1 Nc6 10.Rxf2 Qxd6! 11.Rxd6 Kxd6 12.Qg7 Bf5 13.Rxf4 exf4 14.Qf6+
Be6 15.Qxf4+ Kd7-+)
9...Qxd6! 10.Rxd6 Kxd6 11.Rd1+ Ke6 12.Qh4
(12.Qf3 Kxf7 13.Qd5+ Kg7 14.Rg1+ Kh8 15.Qg2 Bh6-+)
12...Nd7 13.Qh3+ Ke7 14.Qxh7 Nf6-+;
5...Ke6 6.Qg4+ Kxf7 7.Qh5+ Ke6
(7...Kg8? 8.Rhg1+ fxg1Q 9.Rxg1+ Qg7 10.Rxg7+ Kxg7
(10...Bxg7 11.Qe8+ Bf8 12.Qxc8+-)
11.Qxe5+ Kf7 12.Qxh8 h6
(12...Bf5 13.Qe5+-)
13.Qh7+ Bg7 14.Ne4 Nc6
(14...Bd7 15.Nd6+ Kf6 16.Qg8+-)
15.Nd6+ Kf6 16.Ne8++-;
8.Qe8+
(8.Qg4+ is perpetual check)
8...Kf5!
(8...Qe7? 9.Qxc8+ Kf7 10.Qh3!
(10.Rd2 Bh6 11.Qxh8 Qg5 12.Qxh7+ Ke6 13.Qd3 Qg1+ 14.Qf1 Bxd2+ 15.Kxd2
Qg5+ 16.Ke2 Qf5=)
10...Rg8 11.Nd5 Qe6 12.Qxh7+ Rg7 13.Qh4 Qf5 14.Rhf1 Rg2 15.Qc4 b5 16.Qc7+
Qd7 17.Qxe5 Bh6+ 18.Kb1 Qe6 19.Qh5+ Kg7 20.Nc7+-;
9.Rd2
(9.Qh5+ Ke6 is perpetual check)
9...Kg5 10.Rxf2!
(10.Ne4+ Kh6 11.Ng3 Bg4 12.h3 f1Q+ 13.Rxf1 Nc6 14.Qxa8 Bg7 15.Qxh8 Bxh8
16.hxg4 Kg6-+;
10.Nd5 Bb4 11.Qxh8 Bxd2+ 12.Kxd2 Qa5+ 13.Nc3 Bf5 14.Qg7+ Bg6 15.h4+ Kh5
16.Qf6 e4 17.Qxf2 Nd7 and Black should survive to win.)
10...Bg7 11.Rg1+ Kh6 12.Qa4! Qd8 13.Rd2 Qxd2+ 14.Kxd2 Rd8+ 15.Kc1 Rd4 16.Qb3
Bf6 17.Ne2 Rg4 18.Qh3+ Kg5 19.Rxg4+ Bxg4 20.Qe3+ Kg6 21.Qe4+ Kf7
a)21...Bf5 22.Qxb7+-;
b)21...Kh6 22.Qxg4 Nc6 23.Ng3 Ne7 24.Ne4 Ng8 25.h4
(25.Qh3+ Kg6 26.Qg3+ Kh6 27.Nxf6 Nxf6 28.Qxe5 Kg6 29.Qg3+ Kf5 30.Qf3+ Ke5
31.Qxb7 also wins)
25...Be7 26.Qe6+ Kg7 27.Qxe5+ Bf6 28.Qg3+ Kh8 29.Nxf6 Nxf6 30.Qf3 Rf8
31.Qxb7+-;
22.Qd5+ Kg6 23.Qxb7 Bxe2 24.Qxa8 Bg5+ 25.Kb1+-]
3.Ne4+
[3.Qf3(!) 3...Bh6+ 4.Kb1 Kg7 5.Qg4+ Kf8 6.Qh4 Qg7 7.Rd8+ Kf7 8.Qh5+ Ke7 9.Rxh8
Qxh8 10.Qxh6 Qg8 11.Rd1 Nd7 12.Ne4 Qf7 13.Qd6+ Ke8 14.f6 h6 15.Qd2 Qe6 16.Qxh6
Kd8 17.Qf8+ Kc7 18.Qe7 Qc6 19.f7 Kb6 20.Nxf2 Qf3 21.Rd6+ Ka7 22.Nd3 Qh1+
23.Nc1±]
3...Ke7
[3...Kxf5? 4.Kb1! Bh6 5.Rhf1 Bf4
(5...Be3 6.Nxf2 Kg6 7.Qg2+ Kf7 8.Ne4+ Bf4 9.Rg1 Bh6 10.Rd6 Qxd6 11.Nxd6++-)
6.Rxf2 Qe7
(6...Rd8 7.Rxf4+ Kxf4 8.Rf1++-)
7.Rxf4+ Kxf4 8.Rf1+ Kg4 9.Nf6+ Qxf6
(9...Kg5? 10.Qf3 Kg6 11.Qh5+ Kg7 12.Qg5+ and mate in 7)
10.Rxf6+- and mate soon]
4.Nd6
[4.Rhf1 Bxf5 5.Rxf2 Bh6+ 6.Kb1 Rd8-+;
4.f6+ Ke8 5.f7+ Ke7 6.Nd6 transposes to the line in the notes after 2... Ke8!,
in which line Black survives.]
4...Bh6+ 5.Kb1 Kf6 6.Qf3 Rd8!
[6...Bf4 7.Qg4 Qg7
(7...Nc6? 8.Qh4+ Bg5 9.Ne4+ Kxf5 10.Qxg5+!
(10.Nxg5? Rg8!
(10...Nd4? 11.Rd2 Kg6 12.Ne4 Qc6 13.Qg5+ Kf7 14.Rxf2++-;
10...h5? 11.Rhf1 Kg6 12.Ne4 Qe7 13.Rd6+ Kg7 14.Rf6! Rh7 15.Qxf2 Be6
16.Ng5+-)
11.Qxf2+ Kxg5 12.Rhg1+ Bg4 13.Rxg4+ Kxg4 14.Rg1+ Kh5 15.Qf5+ Kh4 draw;
10...Kxe4 11.Qh4+ Kf5 12.Rhf1 Nd4 13.Rxf2+ Ke6 14.Rf6+ Kd5 15.c3 Bf5+
16.Rxf5 Raf8 17.Qxd4+ Ke6 18.Qd5+! Kxf5 19.Rf1+ Kg5 20.Qg2+ Kh4 21.Qg3+ Kh5
22.Rg1+-;
8.Qh4+ Bg5 9.Ne4+ Kxf5 10.Qxf2+
(10.Ng3+ Kg6 11.Rd6+ Qf6!
(11...Kf7? 12.Qc4+ Ke7 13.Qc7+ Nd7 14.Nf5+ Kf8 15.Nxg7 Kxg7 16.Rxd7+ Bxd7
17.Qxd7+±)
12.Qe4+ Kf7 13.Rxf6+ Bxf6 14.Rf1 Be6 15.Rxf2
(15.Nh5 Nd7 16.Nxf6 Kxf6 17.Rxf2+ Ke7 18.Qb4+ Kd8 19.Qxb7 Rb8 20.Qxa6
Rg8 21.b3 Rb6=)
15...Nd7 16.Qxb7 Rab8 17.Qxa6 Ra8 18.Qd3 Bxa2+ 19.Kc1 Be6 20.Ne4 unclear!;
10...Bf4
(10...Ke6?
a)11.Nxg5+ Qxg5
(11...Ke7 12.Qc5+ Kf6 13.Ne4+ mates soon)
12.Rhf1 Qf4 13.Qg2+-;
b)11.Rhg1 Qxg1
(11...Qh6 12.Qg2! Ke6 13.Rd6+ Kf7 14.Rxh6 Bxh6 15.Qf3+ Bf4 16.Qh5+ Ke6
17.Rg7 Kd5 18.Qf3 mates soon;
11...Qf8 12.Qg2 Ke6 13.Qg4+ Ke7 14.Qh4+ and White mates.)
12.Nd6+ Kf6 13.Rxg1
(13.Qxg1 Nc6 14.Qf2=)
13...Nc6
(13...Ke6 14.Ne4 Nc6 transposes to the variation below)
14.Ne4+ Ke6 15.Qg2!
(15.Qc5 Rd8 16.Qc4+ Kf5 17.Ng5 Bxg5 18.Qg4+ Kf6 19.Qxg5+ Ke6 20.Qh6+
Kd5 21.Rd1+ Nd4 22.Rxd4+ exd4 23.Qg5+ Bf5 24.Qxf5+ Kc6 25.Qxh7² but unclear
(somebody comment?))
15...Nd4
(15...Rd8 16.c4! Rf8
(16...Nd4 17.Qh3+ Nf5 18.Qxh7 Ne7 19.Rg7 Rd1+ 20.Kc2 Rc1+ 21.Kd3
Rd1+ 22.Ke2 Rd7 23.Qh5+-;
16...Ne7 17.Qh3+ Kf7 18.Qxh7+ Ke6 19.Rg7 transposes)
17.Qh3+ Ke7 18.Rg7+ Rf7 19.Qa3+ Ke6 20.Qd6+ Kf5 21.Ng3+ Bxg3 22.Rxf7+
Kg4 23.Qd3 and mate soon;
16.Qg7! Bd7 17.Qf6+ Kd5 18.Re1! Rac8 19.Qd6+ Kc4 20.Qxd7+-]
7.Qh3
[7.Qh5 Be3 8.Qh4+ Kg7 9.Qg3+ Kf6
(9...Kf8? 10.Qxe5 Qg7 11.f6+-)
10.Qh4+ draw
(10.Ne4+ Kf7 11.Qxe3 Nc6 12.Qh6 Bxf5 13.Qf6+ Kg8 14.Qxf5 Rxd1+ 15.Rxd1 Rf8
is OK for Black)]
7...Rxd6
[or 7...Kg7 8.f6+ Kg6 9.Qg3+ Kxf6 10.Qxf2+ Bf4 11.Qh4+ Ke6 and White can do no
better than a perpetual check;
but not 7...Bg5? 8.Ne4+ Kg7 9.Nxg5 Rxd1+ 10.Rxd1 h6 11.Ne4 Nc6 12.Rd6 Bxf5
13.Qxf5 Qf7 14.Rf6 Rf8 15.Qg4+ Kh7 16.Rxf7+ Rxf7 17.Nxf2 Rxf2 18.Kc1±]
8.Qxh6+ Ke7 9.Qg7+
[9.Qxh7+ Kd8 10.Qg8+ Kd7 11.Qe6+ Kc6 12.Qc4+
(12.Rxd6+ Qxd6 13.Qxc8+ Kb6-+)
12...Kb6 13.Qb4+ Ka7 14.Rxd6 Bxf5 15.Rd2 Nc6 16.Qc5+ b6 17.Qxf2 Rf8-/+]
9...Kd8 10.Qxe5 Bxf5 11.Rxd6+
[11.Qxd6+ Qxd6 12.Rxd6+ Kc7 13.Rf6 Be4=/- is OK for Black;
11.Qxf5 Nd7 12.Qxh7 Qc5 13.Qg8+ Kc7 14.Qxa8 Rxd1+ 15.Rxd1 Qb5-+]
11...Nd7 12.Ka1
[12.Qf6+ Ke8 13.Re6+ Bxe6 14.Qxe6+ Kf8 15.Rf1 Kg7 16.Rxf2 Kh8 and it looks like
Black survives to win.]
12...Qxc2 13.Rhd1 f1Q
[13...Rc8 14.Rxd7+ Bxd7 15.Qf6+ Ke8 16.Qe5+ and White must take the perpetual
check]
14.Rxf1 Rc8 15.a3
[15.b4 Be6! 16.Qxe6 Qc3+ 17.Kb1 Qc2+ and Black takes the perpetual check]
15...Rc5 16.Qd4 Kc8 17.Rd1 Kb8 18.Rxd7 Bxd7 19.Qf4+ Rc7 20.Rxd7 Qc1+ 21.Qxc1
Rxc1+ 22.Ka2 Rc7=
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