MESON Chess Problem Database
Problem Display
PID: 11163 (3B2R1/7p/K3N1Pp/1p4qk/1R5P/3p3P/6P1/1B3N2 w - - 0 1)
Andrade, Barry Jack da Costa
Chess, 1937
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Sg3#
- 2.g4#
- 1...Qd2
- 2.Sg3#
- 2.g4#
- 1...Qe3
- 2.g4#
- 1...Qf4
- 2.Sxf4#
- 1...Qxh4
- 2.Rxh4#
- 1...Qf6
- 2.Sg3#
- 1...Qe7
- 2.Sg3#
- 1...Qxd8
- 2.Sg3#
- 1...Qxg2
- 2.Sf4#
- 1...Qg3
- 2.Sxg3#
- 1...Qg4
- 2.hxg4#
- 1...Qc5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qd5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qe5
- 2.g4#
- 1...Qf5
- 2.Sg3#
- 1...d2
- 2.Sg7#
- 1...hxg6
- 2.Sg7#
- 1...Qc1
- Tries
- 1.Ka5?
- 1...Qxh4
- 2.Rxh4#
- 1...Qxg2
- 2.Sf4#
- 1...Qxg6
- 2.Sf4#
- 1...hxg6
- 2.Sg7#
- 1...Qc1
- 2.Sg3#
- 2.g4#
- 1...Qd2
- 2.Sg3#
- 2.g4#
- 1...Qe3
- 2.g4#
- 1...Qf4
- 2.Sxf4#
- 1...Qf6
- 2.Sg3#
- 1...Qe7
- 2.Sg3#
- 1...Qg3
- 2.Sxg3#
- 1...Qg4
- 2.hxg4#
- 1...Qc5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qd5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qe5
- 2.g4#
- 1...Qf5
- 2.Sg3#
- 1...d2
- 2.Sg7#
- 1...Qxd8+!
- 1...Qxh4
- 1.Sf4+?
- 1...Kxh4
- 2.g3#
- 1...Qxf4!
- 1...Kxh4
- 1.Bxd3?
- threat
- 2.Sg7#
- 1...Qf6
- 2.Sg3#
- 1...Qe7
- 2.Sg3#
- 2.Be2#
- 1...Qe5
- 2.g4#
- 1...Qf5
- 2.Sg3#
- 1...Qxg6!
- threat
- 1.Be7?
- 1...Qxh4
- 2.Rxh4#
- 1...Qxe7
- 2.Sg3#
- 1...Qxg2
- 2.Sf4#
- 1...hxg6
- 2.Sg7#
- 1...Qc1
- 2.Sg3#
- 2.g4#
- 1...Qd2
- 2.Sg3#
- 2.g4#
- 1...Qe3
- 2.g4#
- 1...Qf4
- 2.Sxf4#
- 1...Qf6
- 2.Sg3#
- 1...Qg3
- 2.Sxg3#
- 1...Qg4
- 2.hxg4#
- 1...Qc5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qd5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qe5
- 2.g4#
- 1...Qf5
- 2.Sg3#
- 1...d2
- 2.Sg7#
- 1...Qxg6!
- 1...Qxh4
- 1.g4+?
- 1...Qxg4
- 2.hxg4#
- 1...Kxh4!
- 1...Qxg4
- 1.Ka5?
- Keys
- 1.Bf6!
- 1...Qxh4
- 2.Rxh4#
- 1...Qxf6
- 2.Sg3#
- 1...Qxg2
- 2.Sf4#
- 1...Qxg6
- 2.Sf4#
- 1...hxg6
- 2.Sg7#
- 1...Qc1
- 2.Sg3#
- 2.g4#
- 1...Qd2
- 2.Sg3#
- 2.g4#
- 1...Qe3
- 2.g4#
- 1...Qf4
- 2.Sxf4#
- 1...Qg3
- 2.Sxg3#
- 1...Qg4
- 2.hxg4#
- 1...Qc5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qd5
- 2.Sg3#
- 2.Sf4#
- 2.g4#
- 1...Qe5
- 2.g4#
- 1...Qf5
- 2.Sg3#
- 1...d2
- 2.Sg7#
- 1...Qxh4
- 1.Bf6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- Q(c);N_GUARD::P(C)
- Q(c);N_GUARD::S(H),XQ(c)
- Q(c);OGATE,XP(F)::R1(E),XQ(c)
- Q(c);N_GUARD,P_PINS(H)::S(B)
- Q(c);N_GUARD::S(B)
- Q(c);N_GUARD,XB(J)::S(B)
- Q(c);N_GUARD,XP(C)::S(H)
- Q(c);N_GUARD::S(B),XQ(c)
- Q(c);OGATE::P(D),XQ(c)
- P(a);::S(H)
- P(f);SBLOCK,XP(I)::S(H)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- Q(c);OGATE,XP(F)::R1(E),XQ(c)
- Q(c);N_GUARD,XP(C)::S(H)
- Q(c);N_GUARD,XP(I)::S(H)
- P(f);SBLOCK,XP(I)::S(H)
- Q(c);N_GUARD::P(C)
- Q(c);N_GUARD::S(H),XQ(c)
- Q(c);N_GUARD::S(B)
- Q(c);N_GUARD::S(B),XQ(c)
- Q(c);OGATE::P(D),XQ(c)
- P(a);::S(H)
- Refutation
- Q(c);CHECK,XB(J)
- Try
- S(H);CHECK
- Vars
- K(d);P-FLIGHT,P_SPINQ(c),XP(F)::P(C)
- Refutation
- Q(c);XS(H)
- Try
- B(A);XP(a)
- Threat
- S(H)
- Vars
- Q(c);N_GUARD,P_PINS(H)::S(B)
- Q(c);N_GUARD::P(C)
- Q(c);N_GUARD::S(B)
- Refutation
- Q(c);P_PINS(H),XP(I)
- Try
- B(J);
- Vars
- Q(c);OGATE,XP(F)::R1(E),XQ(c)
- Q(c);N_GUARD,XB(J)::S(B)
- Q(c);N_GUARD,XP(C)::S(H)
- P(f);SBLOCK,XP(I)::S(H)
- Q(c);N_GUARD::P(C)
- Q(c);N_GUARD::S(H),XQ(c)
- Q(c);N_GUARD,P_PINS(H)::S(B)
- Q(c);N_GUARD::S(B),XQ(c)
- Q(c);OGATE::P(D),XQ(c)
- Q(c);N_GUARD::S(B)
- P(a);::S(H)
- Refutation
- Q(c);P_PINS(H),XP(I)
- Try
- P(C);CHECK
- Vars
- Q(c);OGATE,XP(C)::P(D),XQ(c)
- Refutation
- K(d);P-FLIGHT,P_SPINQ(c),XP(F)
- Try
- Actual
- B(J);
- Vars
- Q(c);OGATE,XP(F)::R1(E),XQ(c)
- Q(c);N_GUARD,P_PINS(H),XB(J)::S(B)
- Q(c);N_GUARD,XP(C)::S(H)
- Q(c);N_GUARD,XP(I)::S(H)
- P(f);SBLOCK,XP(I)::S(H)
- Q(c);N_GUARD::P(C)
- Q(c);N_GUARD::S(H),XQ(c)
- Q(c);N_GUARD::S(B),XQ(c)
- Q(c);OGATE::P(D),XQ(c)
- Q(c);N_GUARD::S(B)
- P(a);::S(H)
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).