MESON Chess Problem Database
Problem Display
PID: 132465 (4b3/4Kp2/nB3P1N/p1ppkp2/P2R1R2/p4P2/B7/8 w - - 0 1)
Thomas, Georg
The Field, 1957
(First published on Thu Mar 14 1957)
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Bxa4
- 2.Sxf7#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...Sb8
- 2.Bc7#
- 1...cxd4
- 2.Rxf5#
- 1...c4
- 2.Rxf5#
- 1...Bxa4
- Tries
- 1.Bb1?
- 1...Bxa4
- 2.Sxf7#
- 1...cxd4
- 2.Rxf5#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...Sb8
- 2.Bc7#
- 1...c4
- 2.Rxf5#
- 1...a2!
- 1...Bxa4
- 1.Bb3?
- 1...Bxa4
- 2.Sxf7#
- 1...cxd4
- 2.Rxf5#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...Sb8
- 2.Bc7#
- 1...c4
- 2.Rxf5#
- 1...a2!
- 1...Bxa4
- 1.Bxd5?
- 1...Bxa4
- 2.Sxf7#
- 1...cxd4
- 2.Rxf5#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...Sb8
- 2.Bc7#
- 1...c4
- 2.Rxf5#
- 1...a2!
- 1...Bxa4
- 1.Bxa5?
- 1...Bxa4
- 2.Sxf7#
- 1...cxd4
- 2.Rxf5#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...Sb8
- 2.Bc7#
- 1...c4!
- 1...Bxa4
- 1.Bxc5?
- threat
- 2.Bd6#
- 2.Rxf5#
- 1...Bd7
- 2.Sxf7#
- 2.Bd6#
- 1...Sxc5!
- threat
- 1.Ba7?
- 1...Bxa4
- 2.Sxf7#
- 1...cxd4
- 2.Rxf5#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb4
- 2.Bb8#
- 1...Sb8
- 2.Bxb8#
- 1...c4
- 2.Rxf5#
- 1...Sc7!
- 1...Bxa4
- 1.Bd8?
- 1...Bxa4
- 2.Sxf7#
- 1...cxd4
- 2.Rxf5#
- 1...Bb5
- 2.Sxf7#
- 1...Bc6
- 2.Sxf7#
- 1...Bd7
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...Sb8
- 2.Bc7#
- 1...c4!
- 1...Bxa4
- 1.Rb4?
- threat
- 2.Rxf5#
- 1...Sxb4
- 2.Bc7#
- 1...Bd7
- 2.Sxf7#
- 1...axb4!
- threat
- 1.Rc4?
- threat
- 2.Rxf5#
- 1...Bd7
- 2.Sxf7#
- 1...dxc4!
- threat
- 1.Rg4?
- threat
- 2.Rxd5#
- 1...cxd4
- 2.Bxd4#
- 1...Bc6
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...c4
- 2.f4#
- 1...fxg4!
- threat
- 1.Bb1?
- Keys
- 1.Rh4!
- threat
- 2.Rxd5#
- 1...cxd4
- 2.Bxd4#
- 1...Bc6
- 2.Sxf7#
- 1...Sb4
- 2.Bc7#
- 1...Sc7
- 2.Bxc7#
- 1...c4
- 2.f4#
- threat
- 1.Rh4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- B(i);N_GUARD,XP(C)::S(H),XP(h)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- P(c);XR(D)::R1(E),XP(f)
- P(c);::R1(E),XP(f)
- Tries
- Try
- B(A);
- Vars
- B(i);N_GUARD,XP(C)::S(H),XP(h)
- P(c);XR(D)::R1(E),XP(f)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- P(c);::R1(E),XP(f)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- B(i);N_GUARD,XP(C)::S(H),XP(h)
- P(c);XR(D)::R1(E),XP(f)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- P(c);::R1(E),XP(f)
- Refutation
- P(a);
- Try
- B(A);XP(d)
- Vars
- B(i);N_GUARD,XP(C)::S(H),XP(h)
- P(c);XR(D)::R1(E),XP(f)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- P(c);::R1(E),XP(f)
- Refutation
- P(a);
- Try
- B(F);XP(b)
- Vars
- B(i);N_GUARD,XP(C)::S(H),XP(h)
- P(c);SBLOCK,XR(D)::R1(E),XP(f)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- Refutation
- P(c);
- Try
- B(F);XP(c)
- Threat
- DUALS(2)
- Refutation
- S(g);XB(F)
- Try
- B(F);
- Vars
- B(i);N_GUARD,XP(C)::S(H),XP(h)
- P(c);XR(D)::R1(E),XP(f)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- P(c);::R1(E),XP(f)
- Refutation
- S(g);
- Try
- B(F);
- Vars
- B(i);N_GUARD,XP(C)::S(H),XP(h)
- P(c);SBLOCK,XR(D)::R1(E),XP(f)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- Refutation
- P(c);
- Try
- R(D);
- Threat
- R1(E),XP(f)
- Vars
- S(g);N_GUARD,XR(D)::B(F)
- B(i);N_GUARD::S(H),XP(h)
- Refutation
- P(b);XR(D)
- Try
- R(D);
- Threat
- R1(E),XP(f)
- Vars
- B(i);N_GUARD::S(H),XP(h)
- Refutation
- P(d);XR(D)
- Try
- R(E);
- Threat
- R1(D),XP(d)
- Vars
- P(c);OGATE,XR(D)::B(F),XP(c)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- P(c);::P(B)
- Refutation
- P(f);XR(E)
- Try
- Actual
- R(E);
- Threat
- R1(D),XP(d)
- Vars
- P(c);OGATE,XR(D)::B(F),XP(c)
- B(i);N_GUARD::S(H),XP(h)
- S(g);N_GUARD::B(F)
- S(g);N_GUARD::B(F),XS(g)
- P(c);::P(B)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).