MESON Chess Problem Database
Problem Display
PID: 50723 (1n3rB1/2Q2P2/8/pP1kBK2/1b6/2n5/N1P5/8 w - - 0 1)
Smithies, VL
Chess Amateur (The), 1907
#2
8 + 6
SOLUTION
- SOUND
- Sets
- 1...Rxf7+
- 2.Bxf7#
- 1...Rc8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Rd8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Re8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Ba3
- 2.Sxc3#
- 1...Bd6
- 2.Sxc3#
- 1...Be7
- 2.Sxc3#
- 1...Sb1
- 2.c4#
- 1...Sd1
- 2.c4#
- 1...Sxa2
- 2.c4#
- 1...Se2
- 2.c4#
- 1...Sa4
- 2.c4#
- 1...Se4
- 2.c4#
- 1...Sxb5
- 2.c4#
- 1...Sa6
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sd7
- 2.Qc6#
- 1...a4
- 2.Sxb4#
- 1...Rxf7+
- Tries
- 1.Bf6?
- 1...Rxf7
- 2.Bxf7#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sxa2
- 2.c4#
- 1...Sxb5
- 2.c4#
- 1...Sc6
- 2.Qxc6#
- 1...Rc8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Rd8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Re8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Ba3
- 2.Sxc3#
- 1...Bd6
- 2.Sxc3#
- 1...Be7
- 2.Sxc3#
- 1...Sb1
- 2.c4#
- 1...Sd1
- 2.c4#
- 1...Se2
- 2.c4#
- 1...Sa4
- 2.c4#
- 1...Se4
- 2.c4#
- 1...Sa6
- 2.Qc6#
- 1...Sd7
- 2.Qc6#
- 1...a4
- 2.Sxb4#
- 1...Bc5!
- 1...Rxf7
- 1.Bg7?
- 1...Rxf7+
- 2.Bxf7#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sxa2
- 2.c4#
- 1...Sxb5
- 2.c4#
- 1...Sc6
- 2.Qxc6#
- 1...Rc8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Rd8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Re8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Ba3
- 2.Sxc3#
- 1...Bd6
- 2.Sxc3#
- 1...Be7
- 2.Sxc3#
- 1...Sb1
- 2.c4#
- 1...Sd1
- 2.c4#
- 1...Se2
- 2.c4#
- 1...Sa4
- 2.c4#
- 1...Se4
- 2.c4#
- 1...Sa6
- 2.Qc6#
- 1...Sd7
- 2.Qc6#
- 1...a4
- 2.Sxb4#
- 1...Bc5!
- 1...Rxf7+
- 1.Bh8?
- 1...Rxf7+
- 2.Bxf7#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sxa2
- 2.c4#
- 1...Sxb5
- 2.c4#
- 1...Sc6
- 2.Qxc6#
- 1...Rc8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Rd8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Re8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Ba3
- 2.Sxc3#
- 1...Bd6
- 2.Sxc3#
- 1...Be7
- 2.Sxc3#
- 1...Sb1
- 2.c4#
- 1...Sd1
- 2.c4#
- 1...Se2
- 2.c4#
- 1...Sa4
- 2.c4#
- 1...Se4
- 2.c4#
- 1...Sa6
- 2.Qc6#
- 1...Sd7
- 2.Qc6#
- 1...a4
- 2.Sxb4#
- 1...Bc5!
- 1...Rxf7+
- 1.Qxc3?
- threat
- 2.Qd4#
- 1...Rxf7+
- 2.Bxf7#
- 1...Bc5
- 2.Qb3#
- 1...Sc6
- 2.Qxc6#
- 1...Bxc3!
- threat
- 1.Bf6?
- Keys
- 1.Qc8!
- 1...Rxf7+
- 2.Bxf7#
- 1...Rxc8
- 2.f8Q#
- 2.f8B#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sxa2
- 2.c4#
- 1...Sxb5
- 2.c4#
- 1...Bc5
- 2.Qe6#
- 1...Sc6
- 2.Qxc6#
- 1...Rd8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Re8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Ba3
- 2.Sxc3#
- 1...Bd6
- 2.Sxc3#
- 1...Be7
- 2.Sxc3#
- 1...Sb1
- 2.c4#
- 1...Sd1
- 2.c4#
- 1...Se2
- 2.c4#
- 1...Sa4
- 2.c4#
- 1...Se4
- 2.c4#
- 1...Sa6
- 2.Qc6#
- 1...Sd7
- 2.Qc6#
- 1...a4
- 2.Sxb4#
- 1...Rxf7+
- 1.Qc8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(f);CHECK,OGATE,P_SPINR(f),XP(G)::B(H),XR(f)
- R(f);N_PINP(G),XB(H)::PXR(f)=Q
- B(b);N_GUARD::S(A),XS(a)
- S(a);OGATE::P(B)
- S(a);OGATE,XS(A)::P(B)
- S(a);OGATE,XP(C)::P(B)
- S(e);N_GUARD::QAB1(F)
- S(e);N_GUARD::QAB1(F),XS(e)
- P(c);N_GUARD::S(A),XB(b)
- Tries
- Try
- B(D);N_SPINP(G)
- Vars
- R(f);OGATE,P_PINB(D),P_SPINR(f),XP(G)::B(H),XR(f)
- R(f);OGATE,XB(H)::PXR(f)=Q
- S(a);OGATE,XS(A)::P(B)
- S(a);OGATE,XP(C)::P(B)
- S(e);N_GUARD::QAB1(F),XS(e)
- B(b);N_GUARD::S(A),XS(a)
- S(a);OGATE::P(B)
- S(e);N_GUARD::QAB1(F)
- P(c);N_GUARD::S(A),XB(b)
- Refutation
- B(b);
- Try
- B(D);
- Vars
- R(f);CHECK,OGATE,P_SPINR(f),XP(G)::B(H),XR(f)
- R(f);N_PINP(G),XB(H)::PXR(f)=Q
- S(a);OGATE,XS(A)::P(B)
- S(a);OGATE,XP(C)::P(B)
- S(e);N_GUARD::QAB1(F),XS(e)
- B(b);N_GUARD::S(A),XS(a)
- S(a);OGATE::P(B)
- S(e);N_GUARD::QAB1(F)
- P(c);N_GUARD::S(A),XB(b)
- Refutation
- B(b);
- Try
- B(D);
- Vars
- R(f);CHECK,OGATE,P_SPINR(f),XP(G)::B(H),XR(f)
- R(f);N_PINP(G),XB(H)::PXR(f)=Q
- S(a);OGATE,XS(A)::P(B)
- S(a);OGATE,XP(C)::P(B)
- S(e);N_GUARD::QAB1(F),XS(e)
- B(b);N_GUARD::S(A),XS(a)
- S(a);OGATE::P(B)
- S(e);N_GUARD::QAB1(F)
- P(c);N_GUARD::S(A),XB(b)
- Refutation
- B(b);
- Try
- Q(F);XS(a)
- Threat
- QAR1(F)
- Vars
- R(f);CHECK,OGATE,P_SPINR(f),XP(G)::B(H),XR(f)
- B(b);SBLOCK::QAB(F)
- S(e);N_GUARD::QAB1(F),XS(e)
- Refutation
- B(b);XQ(F)
- Try
- Actual
- Q(F);
- Vars
- R(f);CHECK,OGATE,P_SPINR(f),XP(G)::B(H),XR(f)
- R(f);N_PINP(G),XQ(F)::P=Q
- R(f);N_PINP(G),XB(H)::PXR(f)=Q
- S(a);OGATE,XS(A)::P(B)
- S(a);OGATE,XP(C)::P(B)
- B(b);SBLOCK::QAB1(F)
- S(e);N_GUARD::QAB1(F),XS(e)
- B(b);N_GUARD::S(A),XS(a)
- S(a);OGATE::P(B)
- S(e);N_GUARD::QAB1(F)
- P(c);N_GUARD::S(A),XB(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).