6th International Solving Contest (ISC)
24th January, 2010
Solutions
Round 1:
1) V. Kopaev, Magyar Sakkelet 1980
1.Rc2? Rh4!, 1.Rc3? Rd3!, 1.Rc4? Rd5!, 1.Rc7? Qh6!
1.Rc1! (5) thr./Rxc1,Rd5/Rd3/Rh4/Qh6/Sc3,Sc5 2.Bf4/Q(x)d5/Qxd3/Qxd1/Qb8/Qb6#
2) G. Bakcsi, Magyar Sakkszovetzeg 1959
1.Qg2 thr. 2.Qxd5+ (1,25) Sxd5 3.Sc5#
1. … Re4 2.Qg5 (1,25) thr./S~~/Sd7 3.Qxf6/Sc5/Qe7#
1. … Rd7 2.Qg7 (1,25) thr./S~~/Se4 3.Qxf6/Sc5/Qe5#
1. … Se4 2.Qxe4+ (1,25) Rxe4,dxe4 3.Sc5#
3) U. Degener, Championnat de RDA 1987-88
1.Sf3+? Kxh3!, 1.f6? Sg6!, 1.Be5? dxe5!
1.Bd4! thr.2.Bxf2#
1. … Ra2 2.Be5 thr. 3.Bg3#
2. … dxe5 3.f6 thr. 4.Sf3+ Kxh3 5.Bd7#
3. … Sf7 4.Bxf7 ~~ 5.Sf3+ (*) Kxh3 6.Be6#
3. …Sg6 4.Bxg6 ~~ 5.Sf3+ (*) Kxh3 6.Bf5#
* = 4 pts., ** = 5 pts.
4) J.H. Marwitz, Schakend Nederland 1984
1.Sc3+ [i] Kf4 2.Sd5+ Ke4 3.Sf6+ Kf4 4.Sxh5+ (1) Kg4 5.Sf6+ Kf4 6.Sd5+ Ke4 7.Sc3+
Kf4 8.Se2+! (2) Kg4 [ii] 9.Rxc8! (1) Bf5+ 10.Ke7 Bxc8 11.Kd8 Bf5/Ba6 12.Sd4!
(1) +
[i] 1.Rxc8? Bf5+!
[ii] 8. … Ke4? 9.Sg3+! and 10.Rxc8.
5) Chr. Jones, US Problem Bulletin 1990
I) 1.Qa7 Rb2 2.Kxf5 Rxb7 3.Kf6 Rb3 4.Qe7 Rf3# (2,5)
II) 1.Qb2 Re2 2.Kxh5 Rxe5 3.Kxh6 Re3 4.Qg7 Rh3# (2,5)
6) W. Tura, Magyar Sakkelet 1985
1.Re8! Zugzwang
1. … exf6 2.Qxd5+ Kxd5 3.Sc3+ Kc6 4.Sd4+ (2,5) Sxd4#
1. … d4 2.Bb7+ Kxb7 3.Sc5+ Kc6 4.Sxd4+ (2,5) Sxd4#
Round 2:
7) J.C. Morra, The Field 1961
1. … Kxe5 2.Qe3#
1.Qb6? Qd5!, 1.Qd1 / Qd4? d5!
1.Qg6! (5) thr./Bxf6/dxe5/Kxe5/R~~ 2.Qxe8/Qxf6/Rb6/Re3/R(x)e7#
8) Dr. E. Palkoska, Tepl. Chemn. Anzeiger 1922
1.Sh3! Zugzwang
1. … d2 2.Qxd2 (1) thr./cxd2/Kf6 3.Qxc3/Bb2/Qg5#
1. … Se3 2.Bxe3 (1) thr. 3.Qg5/Qd4/Bf4/Bd4#
1. … h4 2.Sf2 (1) thr. 3.Sg4/Sxd3#
1. … c6 2.Qxb8 (0,5) Kf6/Kd4 3.Bg5/Qd6#
1. … Ba7 2.Qxc7 (0,5) Kf6/Kd4 3.Bg5/Qd6#
1. … Bf7 2.Bh6 (0,5) thr./gxh6 3.Bxg7/Qh8#
1. … Bh7 2.Bh6 (0,5) thr./gxh6 3.Bxg7/Qh8#
9) P. Polak, Pravda 1977
1.Qf8! thr. 2.Bxg5+ Kxg5 3.Qh6+ (1) Kxf5 4.e4#
1. … Qxc2+ 2.Sd6+ Ke3 3.Bxg5+ (1) Kd4 4.Sxb5#
2. … Qf5 3.Qxf5+ (1) Ke3 4.Qe4 (Qxe5)#
1. … Sxf3 2.Sh6+ Ke4 3.Qxf3+ (0,5) Kd4 4.Sf5#
2. … Ke3 3.Qxf3+ (0,5) Kd4 4.Sf5#
1. … Rxe7 2.Sxe7+ Ke3 3.Sd5+(1) Kd4 4.e3#
10) T.B. Gorgiew, Shakmatny Listok 1929
1.Bb5+ Kd8 2.Rd6+ (1) Ke7 3.Rd7+ Kf8! 4.Kf6 (1) Kg8! 5.Bc4+ Kh8! 6.Rd8+ (1)
[i] Kh7 7.Bg8+ Kh6! 8.Bb3! (2) [ii] Bd4+ [iii] 9.Rxd4 Bxb3 10.Rh4#.
[i] 6.Rd2? Be4 =
[ii].8.Be6? g5 =
[iii] 8. … Bxb3 9.Rh8# / 8. … g5 or Kh5 9.Bxc2 +
11) V. Bunka & V. Kichigin, Magyar Sakkelet 1980
I) 1.Kxa3 Bf7 2.h2+ Rxh2 3.b1S Rxa2#
II) 1.Rd4 Bf3 2.Rxc3 Rxh3 3.R3c4 Bd1#
III) 1.Kc4 Bf7+ 2.Kc5 Rh4+ 3.Rd4 cxd4#
1 solution = (1,5) / 2 solutions = (3,5) / 3 solutions = (5)
12) C. Gamnitzer, Thema Danicum 1994
1.Bc1! thr. 2.Sd2 ~~ 3.Sxh3+ Sxh3#
1. … Bc5 2.b5 thr. 3.Sd2 thr. 4.Sxh3+ Sxh3#
2. … Bb4 3.axb4 thr. 4.Sd2 thr. 5.Sxh3+ (1,25) Sxh3#
2. … Ba7 3.bxa6 thr. 4.Sd2 thr. 5.Sxh3+ (1,25) Sxh3#
3. … Rb2 4.Sxb2 thr. 5.Bxe3+ (1,25) Bxe3#
4. … d2 5.Sd3+ (1,25) Rxd3#