MESON Chess Problem Database
Problem Display
PID: 136598 (8/4p1R1/3pk3/1Q1n3N/6P1/2P5/7B/K7 w - - 0 1)
Langstaff, William A
The Field, 1919
(First published on Sat Nov 29 1919)
#2
7 + 4
SOLUTION
- SOUND
- Sets
- 1...Sxc3
- 2.Qf5#
- 1...Sb4
- 2.Qf5#
- 1...Sf4
- 2.Qf5#
- 1...Sb6
- 2.Qf5#
- 1...Sf6
- 2.Sf4#
- 2.Qf5#
- 1...Sc7
- 2.Qf5#
- 1...Sxc3
- Tries
- 1.Kb2?
- 1...Sxc3
- 2.Qf5#
- 1...Sb4
- 2.Qf5#
- 1...Sf4
- 2.Qf5#
- 1...Sb6
- 2.Qf5#
- 1...Sf6
- 2.Sf4#
- 2.Qf5#
- 1...Sc7
- 2.Qf5#
- 1...Se3!
- 1...Sxc3
- 1.Bg1?
- 1...Ke5
- 2.Rxe7#
- 1...Sxc3
- 2.Qf5#
- 1...Sb4
- 2.Qf5#
- 1...Sf4
- 2.Qf5#
- 1...Sb6
- 2.Qf5#
- 1...Sf6
- 2.Sf4#
- 2.Qf5#
- 1...Sc7
- 2.Qf5#
- 1...Se3!
- 1...Ke5
- 1.Bg3?
- 1...Sxc3
- 2.Qf5#
- 1...Sb4
- 2.Qf5#
- 1...Sf4
- 2.Qf5#
- 1...Sb6
- 2.Qf5#
- 1...Sf6
- 2.Sf4#
- 2.Qf5#
- 1...Sc7
- 2.Qf5#
- 1...Se3!
- 1...Sxc3
- 1.Bf4?
- 1...Sxc3
- 2.Qf5#
- 1...Sxf4
- 2.Qf5#
- 1...Sb4
- 2.Qf5#
- 1...Sb6
- 2.Qf5#
- 1...Sf6
- 2.Qf5#
- 1...Sc7
- 2.Qf5#
- 1...Se3!
- 1...Sxc3
- 1.Rh7?
- 1...Sxc3
- 2.Qf5#
- 1...Sb4
- 2.Qf5#
- 1...Sf4
- 2.Qf5#
- 1...Sb6
- 2.Qf5#
- 1...Sf6
- 2.Sf4#
- 2.Qf5#
- 1...Sc7
- 2.Qf5#
- 1...Se3!
- 1...Sxc3
- 1.Qb7?
- threat
- 2.Qc8#
- 1...Sxc3
- 2.Rxe7#
- 1...Sf4
- 2.Rxe7#
- 1...Se3
- 2.Rxe7#
- 1...Sb4
- 2.Rxe7#
- 1...Sb6
- 2.Rxe7#
- 1...Sf6
- 2.Rxe7#
- 1...Sc7!
- threat
- 1.c4?
- threat
- 2.cxd5#
- 1...Sc3
- 2.Qf5#
- 1...Sb4
- 2.Qf5#
- 1...Sf4
- 2.Qf5#
- 1...Sb6
- 2.Qf5#
- 1...Sf6
- 2.Sf4#
- 2.Qf5#
- 1...Sc7
- 2.Qf5#
- 1...Se3!
- threat
- 1.g5?
- 1...Sxc3
- 2.Sf4#
- 1...Se3
- 2.Sf4#
- 1...Sb4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sb6
- 2.Sf4#
- 1...Sf6
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Kf5!
- 1...Sxc3
- 1.Kb2?
- Keys
- 1.Be5!
- 1...Kxe5
- 2.Rxe7#
- 1...Sxc3
- 2.Sf4#
- 1...dxe5
- 2.Qc6#
- 1...Se3
- 2.Sf4#
- 1...Sb4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sb6
- 2.Sf4#
- 1...Sf6
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Kxe5
- 1.Be5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 5
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- S(a);OGATE,XP(C)::QAB1(E)
- S(a);OGATE::QAB1(E)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- S(a);OGATE,XP(C)::QAB1(E)
- S(a);OGATE::QAB1(E)
- Refutation
- S(a);
- Try
- B(B);
- Vars
- K(c);P-FLIGHT,P_SPINS(a)::R(G),XP(d)
- S(a);OGATE,XP(C)::QAB1(E)
- S(a);OGATE::QAB1(E)
- Refutation
- S(a);
- Try
- B(B);
- Vars
- S(a);OGATE,XP(C)::QAB1(E)
- S(a);OGATE::QAB1(E)
- Refutation
- S(a);
- Try
- B(B);
- Vars
- S(a);OGATE,XP(C)::QAB1(E)
- S(a);OGATE,XB(B)::QAB1(E)
- S(a);OGATE::QAB1(E)
- Refutation
- S(a);
- Try
- R(G);
- Vars
- S(a);OGATE,XP(C)::QAB1(E)
- S(a);OGATE::QAB1(E)
- Refutation
- S(a);
- Try
- Q(E);
- Threat
- QAB(E)
- Vars
- S(a);N_GUARD,XP(C)::R1(G),XP(d)
- S(a);N_GUARD::R1(G),XP(d)
- Refutation
- S(a);
- Try
- P(C);
- Threat
- P(C),XS(a)
- Vars
- S(a);OGATE::QAB1(E)
- Refutation
- S(a);
- Try
- P(D);
- Vars
- S(a);N_GUARD,XP(C)::S(F)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- Actual
- B(B);
- Vars
- K(c);P-FLIGHT,P_SPINS(a),XB(B)::R(G),XP(d)
- S(a);N_GUARD,XP(C)::S(F)
- P(b);OGATEB,SBLOCK,XB(B)::QAR2(E)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
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).