MESON Chess Problem Database
Problem Display
PID: 54090 (3K1Q2/2p1p1N1/2B2p2/3PPR1p/4knnR/2Ppbp1N/3P1P2/8 w - - 0 1)
Ling, John Francis
Chess, 1943
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Se2
- 2.d6#
- 1...Sg2
- 2.d6#
- 1...Sxh3
- 2.d6#
- 1...Se6+
- 2.dxe6#
- 1...Sg6
- 2.d6#
- 1...Sxf2
- 2.d6#
- 1...Sh2
- 2.d6#
- 1...Sh6
- 2.d6#
- 1...fxe5
- 2.Sg5#
- 1...Se2
- Tries
- 1.Rxf4+?
- 1...Kxe5
- 2.Qxe7#
- 1...Bxf4!
- 1...Kxe5
- 1.fxe3?
- 1...Se6+
- 2.dxe6#
- 1...Sxh3
- 2.d6#
- 1...Sxd5
- 2.Sf2#
- 1...Sxe3
- 2.Sf2#
- 2.Rhxf4#
- 1...Sxe5
- 2.Sf2#
- 2.Rhxf4#
- 2.Rfxf4#
- 1...fxe5
- 2.Sg5#
- 1...Se2
- 2.Sf2#
- 2.d6#
- 1...Sg2
- 2.Sf2#
- 2.d6#
- 1...Sg6
- 2.Sf2#
- 2.d6#
- 1...Sf2
- 2.Sxf2#
- 2.Rhxf4#
- 2.d6#
- 1...Sh2
- 2.Sf2#
- 2.Rhxf4#
- 2.d6#
- 1...Sh6
- 2.Sf2#
- 2.Rhxf4#
- 2.d6#
- 1...e6
- 2.Qb4#
- 1...f2!
- 1...Se6+
- 1.exf6?
- threat
- 2.Sg5#
- 1...Se6+
- 2.dxe6#
- 1...Sxh3
- 2.Qxe7#
- 2.d6#
- 1...Sxd5
- 2.Bxd5#
- 2.Qxe7#
- 1...Se2
- 2.Qxe7#
- 2.d6#
- 1...Sg2
- 2.Qxe7#
- 2.d6#
- 1...Sg6
- 2.d6#
- 1...exf6!
- threat
- 1.Rxf4+?
- Keys
- 1.Qxe7!
- 1...Se6+
- 2.dxe6#
- 1...Bxd2
- 2.Qb4#
- 1...Bxf2
- 2.Rxf4#
- 1...Sxh3
- 2.d6#
- 2.exf6#
- 1...Sxd5
- 2.exf6#
- 1...Sxf2
- 2.d6#
- 2.exf6#
- 1...Sxe5
- 2.d6#
- 1...fxe5
- 2.Sg5#
- 1...Bd4
- 2.Rxf4#
- 1...Bc5
- 2.Rxf4#
- 1...Bb6
- 2.Rxf4#
- 1...Ba7
- 2.Rxf4#
- 1...Se2
- 2.d6#
- 2.exf6#
- 1...Sg2
- 2.d6#
- 2.exf6#
- 1...Sg6
- 2.d6#
- 1...Sh2
- 2.d6#
- 2.exf6#
- 1...Sh6
- 2.d6#
- 2.exf6#
- 1...Se6+
- 1.Qxe7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 6
- Sets
- S(e);N_GUARD,P_SPINS(f)::B(I)+P(F)
- S(e);N_GUARD,P_SPINS(f),XS(D)::B(I)+P(F)
- S(e);CHECK,OGATE,P_SPINS(f)::B(I)+P(F),XS(e)
- S(f);P_SPINS(e),XP(B)::B(I)+P(F)
- S(f);P_SPINS(e)::B(I)+P(F)
- P(h);N_GUARD,XP(G)::S(D)
- Tries
- Try
- R(H);CHECK,XS(e)
- Vars
- K(d);P-FLIGHT,XP(G)::QAR2(L),XP(j)
- Refutation
- B(b);XR(H)
- Try
- P(B);XB(b)
- Vars
- S(e);CHECK,OGATE,P_SPINS(f)::B(I)+P(F),XS(e)
- S(e);N_GUARD,P_SPINS(f),XS(D)::B(I)+P(F)
- S(e);P_SPINS(f),XP(F)::S(D)
- P(h);N_GUARD,XP(G)::S(D)
- P(j);OGATE::QAR(L)
- Refutation
- P(c);
- Try
- P(G);XP(h)
- Threat
- S(D)
- Vars
- S(e);CHECK,OGATE,P_SPINS(f)::B(I)+P(F),XS(e)
- S(e);N_GUARD,P_SPINS(f)::B(I)+P(F)
- Refutation
- P(j);XP(G)
- Try
- Actual
- Q(L);XP(j)
- Vars
- S(e);CHECK,OGATE,P_SPINS(f)::B(I)+P(F),XS(e)
- B(b);N_GUARD,XP(A)::QAR(L)
- B(b);N_GUARD,XP(B)::R1(H),XS(e)
- S(e);N_GUARD,P_SPINS(f),XP(F)::QAR(L)+P(G),XP(h)
- S(f);P_SPINS(e),XP(G)::B(I)+P(F)
- P(h);N_GUARD,P_SPINP(h),XP(G)::S(D)
- B(b);N_GUARD::R1(H),XS(e)
- S(e);N_GUARD,P_SPINS(f)::B(I)+P(F)
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).