Nolot - Problem 2

Problem 2

FEN: r4rk1/pp1n1p1p/1nqP2p1/2b1P1B1/4NQ2/1B3P2/PP2K2P/2R5 w - - 0 1

Problem 2
Bronstein - Ljubojevic, Petropolis izt 1973

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

White to play: 22. Rxc5!!

22.Rxc5!! Nxc5 23.Nf6+ Kh8 24.Qh4 Qb5+ (computers think there is perpetual check here, but...) 25.Ke3! 25... h5 26.Nxh5 Qxb3+ (26... d5+ 27.Bxd5 Qd3 28.Kf2 Ne4+ 29.Bxe4 Qd4+ 30.Kg2 Qxb2+ 31.Kh3 +-) and White won in 41 moves.

Today Deep Junior 8.ZX for example finds it very quickly (around 1 minute):

1.Kd1 Rac8 2.Bh6 Qb5 3.Rc3 Qf1+ 4.Kc2 Rc6 5.Bxf8
-+ (-2.11) Depth: 12 00:00:04 10422kN
1.Nxc5 Nxc5 2.Rxc5 Qxc5 3.e6 Rae8 4.e7 Nc8 5.Kf1 Nxd6 6.Bf6 b5
-+ (-2.10) Depth: 12 00:00:14 25054kN
1.Bf6!
µ (-1.35) Depth: 12 00:00:17 34601kN
1.Bf6 Qb5+ 2.Ke1 Bb4+ 3.Kf2 Bc5+
= (0.00) Depth: 12 00:00:20 34601kN
1.Bf6 Qb5+ 2.Ke1 Nxf6 3.Nxf6+ Kg7 4.Nh5+ gxh5 5.Qf6+ Kg8 6.Qg5+ Kh8 7.Qf6+
= (0.00) Depth: 15 00:01:01 130544kN
1.Rxc5!
= (0.15) Depth: 15 00:01:12 145875kN
1.Rxc5 Nxc5 2.Nf6+ Kh8 3.Qh4 Qb5+ 4.Ke3 h5 5.Nxh5 Qd3+ 6.Kf2 Ne4+ 7.fxe4 Qd4+ 8.Kf1 Qd3+ 9.Ke1 Qb1+ 10.Bd1
+- (2.18) Depth: 15 00:01:18 145875kN