MESON Chess Problem Database
Problem Display
PID: 78571 (br1N2r1/4BPP1/8/1Rn1k1N1/2Pb4/q1n2QP1/PPB5/7K w - - 0 1)
Buchwald, Julius
3rd Sp. Prize, Christian Science Monitor, 1948
#2
13 + 8
SOLUTION
- SOUND
- Sets
- 1...Rb7
- 2.Sc6#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxf3+
- 2.Sxf3#
- 1...Bc6
- 2.Sxc6#
- 1...Se4
- 2.Qf4#
- 1...Sd5
- 2.Qf5#
- 1...Rb7
- Tries
- 1.Kh2?
- threat
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxf3
- 2.Sxf3#
- 1...Bf2
- 2.Qf4#
- 2.Qf6#
- 1...Be3
- 2.Qf6#
- 1...Qa6
- 2.Qf4#
- 2.Qf5#
- 1...Rb6
- 2.Qf4#
- 2.Qf5#
- 1...Be4
- 2.Qf4#
- 2.Qf6#
- 1...Se2
- 2.Qf5#
- 2.Qf6#
- 1...Se4
- 2.Qf4#
- 1...Sd5
- 2.Qf5#
- 1...Bg1+!
- threat
- 1.Se4?
- threat
- 2.Bd6#
- 2.Bf6#
- 2.Qh5#
- 2.Qf4#
- 2.Qf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rbxd8
- 2.Qf6#
- 1...Rxg7
- 2.Bd6#
- 2.Bf6#
- 2.Qf4#
- 2.Qf6#
- 1...Rgxd8
- 2.Qf6#
- 1...Sxe4
- 2.Qf4#
- 1...Sxb5
- 2.Bf6#
- 2.Qh5#
- 2.Qf4#
- 2.Qf6#
- 1...Bg1
- 2.Bf6#
- 2.Qf6#
- 1...Bf2
- 2.Bf6#
- 2.Qf6#
- 1...Be3
- 2.Bf6#
- 2.Qf6#
- 1...Qa6
- 2.Qh5#
- 2.Qf4#
- 1...Rb6
- 2.Qh5#
- 2.Qf4#
- 1...Se2
- 2.Bd6#
- 2.Bf6#
- 2.Qh5#
- 2.Qf6#
- 1...Sd5
- 2.Bd6#
- 2.Qh5#
- 1...Bxe4!
- threat
- 1.Be4?
- threat
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxe4
- 2.Qf4#
- 1...Bg1
- 2.Qf6#
- 1...Bf2
- 2.Qf6#
- 1...Be3
- 2.Qf6#
- 1...Qa6
- 2.Qf4#
- 2.Qf5#
- 1...Rb6
- 2.Qf4#
- 2.Qf5#
- 1...Se2
- 2.Qf5#
- 2.Qf6#
- 1...Sd5
- 2.Qf5#
- 1...Bxe4!
- threat
- 1.Rb6?
- threat
- 2.Bd6#
- 2.Bf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxf3+
- 2.Sxf3#
- 1...Rbxd8
- 2.Bf6#
- 1...Rgxd8
- 2.Bf6#
- 1...Bg1
- 2.Bf6#
- 1...Bf2
- 2.Bf6#
- 1...Be3
- 2.Bf6#
- 1...Bc6
- 2.Sxc6#
- 1...S3e4
- 2.Qf4#
- 1...Sb5
- 2.Bf6#
- 1...Sd5
- 2.Bd6#
- 2.Qf5#
- 1...Sb3
- 2.Bf6#
- 2.Re6#
- 1...Sd3
- 2.Bf6#
- 2.Re6#
- 1...S5a4
- 2.Bf6#
- 2.Re6#
- 1...S5e4
- 2.Re6#
- 2.Qf4#
- 1...Sa6
- 2.Bf6#
- 2.Re6#
- 1...Se6
- 2.Bf6#
- 2.Rxe6#
- 1...Sb7
- 2.Sc6#
- 2.Bf6#
- 2.Re6#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Sd7
- 2.Re6#
- 1...Rxb6!
- threat
- 1.Rb7?
- threat
- 2.Sc6#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rbxd8
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Rgxd8
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Bg1
- 2.Sc6#
- 2.Qf4#
- 2.Qf6#
- 1...Bf2
- 2.Sc6#
- 2.Qf4#
- 2.Qf6#
- 1...Be3
- 2.Sc6#
- 2.Qf6#
- 1...Qa4
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Qa6
- 2.Qf4#
- 2.Qf5#
- 1...Rc8
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Se2
- 2.Sc6#
- 2.Qd5#
- 2.Qf5#
- 2.Qf6#
- 1...S3e4
- 2.Sc6#
- 2.Qf4#
- 1...Sd5
- 2.Sc6#
- 2.Qxd5#
- 2.Qf5#
- 1...Sd3
- 2.Sc6#
- 2.Qf6#
- 1...S5e4
- 2.Sc6#
- 2.Qf4#
- 1...Se6
- 2.Sc6#
- 2.Qf5#
- 2.Qf6#
- 1...Sd7
- 2.Sc6#
- 2.Qf4#
- 2.Qf5#
- 1...Bxb7!
- threat
- 1.f8Q?
- threat
- 2.Sgf7#
- 2.Sdf7#
- 2.Bd6#
- 2.Bf6#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxf3+
- 2.Sxf3#
- 1...Rxd8
- 2.Bf6#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Rxg7
- 2.Bd6#
- 2.Bf6#
- 2.Qxg7#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Sxb5
- 2.Sgf7#
- 2.Sdf7#
- 2.Bf6#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Bg1
- 2.Bf6#
- 2.Qf4#
- 2.Qf6#
- 1...Bf2
- 2.Bf6#
- 2.Qf4#
- 2.Qf6#
- 1...Be3
- 2.Bf6#
- 2.Qf6#
- 1...Qa6
- 2.Sgf7#
- 2.Sdf7#
- 2.Qf4#
- 2.Qf5#
- 1...Rb6
- 2.Sgf7#
- 2.Sdf7#
- 2.Qf4#
- 2.Qf5#
- 1...Be4
- 2.Sgf7#
- 2.Sdf7#
- 2.Bd6#
- 2.Bf6#
- 2.Qf4#
- 2.Qf6#
- 1...Bd5
- 2.Bd6#
- 2.Bf6#
- 2.Qf4#
- 2.Qf5#
- 2.Qf6#
- 1...Se2
- 2.Sgf7#
- 2.Sdf7#
- 2.Bd6#
- 2.Bf6#
- 2.Qf5#
- 2.Qf6#
- 1...Se4
- 2.Sgf7#
- 2.Sdf7#
- 2.Q3f4#
- 2.Q3f5#
- 2.Q8f4#
- 2.Q8f5#
- 1...Sd5
- 2.Sgf7#
- 2.Sdf7#
- 2.Bd6#
- 2.Q3f5#
- 2.Q8f5#
- 1...Rxf8!
- threat
- 1.f8B?
- threat
- 2.Sgf7#
- 2.Sdf7#
- 2.Bd6#
- 2.Bf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxf3+
- 2.Sxf3#
- 1...Rxd8
- 2.Bf6#
- 1...Rxg7
- 2.Bd6#
- 2.Bf6#
- 2.Bxg7#
- 1...Sxb5
- 2.Sgf7#
- 2.Sdf7#
- 2.Bf6#
- 1...Bg1
- 2.Bf6#
- 1...Bf2
- 2.Bf6#
- 1...Be3
- 2.Bf6#
- 1...Qa6
- 2.Sgf7#
- 2.Sdf7#
- 1...Rb6
- 2.Sgf7#
- 2.Sdf7#
- 1...Bd5
- 2.Bd6#
- 2.Bf6#
- 1...Se4
- 2.Sgf7#
- 2.Sdf7#
- 2.Qf4#
- 1...Sd5
- 2.Sgf7#
- 2.Sdf7#
- 2.Bd6#
- 2.Qf5#
- 1...Rxf8!
- threat
- 1.Kh2?
- Keys
- 1.Qc6!
- threat
- 2.Sf3#
- 2.Bf6#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxc6+
- 2.Sxc6#
- 1...Sxa2
- 2.Bf6#
- 1...Sxb5
- 2.Bf6#
- 1...Se4
- 2.Qe6#
- 1...Sb1
- 2.Bf6#
- 1...Sd1
- 2.Bf6#
- 1...Se2
- 2.Bf6#
- 1...Sa4
- 2.Bf6#
- 1...Sd5
- 2.Qd6#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 1
- Sets
- R(h);CHECK,OGATE::PXR(h)=Q
- B(f);CHECK,XQ(E)::S(I),XB(f)
- B(f);N_GUARD::S(M),XB(f)
- S(b);N_PINQ(E)::QAB1(E)
- S(b);N_PINQ(E),N_SPINS(d)::QAR1(E)
- Tries
- Try
- K(A);N_SPINQ(E),P-FLIGHT
- Threat
- DUALS(3)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- B(f);XQ(E)::S(I),XB(f)
- B(c);::QAB1(E)
- S(b);::QAB1(E)
- S(b);N_SPINS(d)::QAR1(E)
- Refutation
- B(c);CHECK
- Try
- S(I);N_SPINQ(E)
- Threat
- DUALS(5)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- R(g);XS(M)::QAB1(E)
- R(h);XS(M)::QAB1(E)
- S(b);XS(I)::QAB1(E)
- Refutation
- B(f);P_PINQ(E),XS(I)
- Try
- B(D);N_SPINQ(E)
- Threat
- DUALS(3)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- S(b);XB(D)::QAB1(E)
- B(c);::QAB1(E)
- S(b);N_SPINS(d)::QAR1(E)
- Refutation
- B(f);P_PINQ(E),XB(D)
- Try
- R(H);N_PINS(d)
- Threat
- DUALS(2)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- B(f);CHECK,XQ(E)::S(I),XB(f)
- R(g);XS(M)::B(J)
- R(h);XS(M)::B(J)
- B(c);::B(J)
- B(f);N_GUARD::S(M),XB(f)
- S(b);N_PINQ(E)::QAB1(E)
- S(b);::B(J)
- S(d);N_GUARD::R1(H)
- Refutation
- R(g);XR(H)
- Try
- R(H);N_PINS(d),N_SPINQ(E)
- Threat
- DUALS(4)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- Refutation
- B(f);P_PINQ(E),XR(H)
- Try
- P(K);
- Threat
- DUALS(7)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- B(f);CHECK,XQ(E)::S(I),XB(f)
- Refutation
- R(h);XQ(K)
- Try
- P(K);
- Threat
- DUALS(4)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- B(f);CHECK,XQ(E)::S(I),XB(f)
- R(g);XS(M)::B(J)
- B(c);::B(J)
- Refutation
- R(h);XB(K)
- Try
- Actual
- Q(E);
- Threat
- DUALS(2)
- Vars
- R(h);CHECK,OGATE::PXR(h)=Q
- B(f);CHECK,XQ(E)::S(M),XB(f)
- S(b);XP(B)::B(J)
- S(b);N_SPINS(d),XR(H)::B(J)
- S(b);N_PINQ(E)::QAR1(E)
- S(b);::B(J)
- S(b);N_PINQ(E),N_SPINS(d)::QAB1(E)
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).