MESON Chess Problem Database
Problem Display
PID: 16565 (1q5B/1p6/2PN3Q/r3N2r/1P1k2p1/p4P2/B1nK3b/4n3 w - - 0 1)
Webster, LJ
Chess, 1941
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Raxe5
- 2.Sb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Rh3
- 2.Sf5#
- 1...Rh4
- 2.Sf5#
- 1...Rhxe5
- 2.Sf5#
- 1...Rf5
- 2.Sxf5#
- 1...Rxh6
- 2.Sf5#
- 1...Bg1
- 2.Qf4#
- 1...Bf4+
- 2.Qxf4#
- 1...Bxe5
- 2.Qf4#
- 1...Sxf3+
- 2.Sxf3#
- 1...Sa1
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sxb4
- 2.Qe3#
- 1...gxf3
- 2.Sxf3#
- 1...g3
- 2.Qf4#
- 1...bxc6
- 2.Sxc6#
- 1...Ra4
- Tries
- 1.Sd3+?
- 1...Rae5
- 2.Sb5#
- 1...Rhe5
- 2.Sf5#
- 1...Be5
- 2.Qf4#
- 1...Qxh8!
- 1...Rae5
- 1.Sxg4+?
- 1...Rae5
- 2.Sb5#
- 1...Rhe5
- 2.Sf5#
- 1...Be5
- 2.Qf4#
- 1...Qxh8!
- 1...Rae5
- 1.Sg6+?
- 1...Rae5
- 2.Sb5#
- 1...Rhe5
- 2.Sf5#
- 1...Be5
- 2.Qf4#
- 1...Qxh8!
- 1...Rae5
- 1.Sd7+?
- 1...Rae5
- 2.Sb5#
- 1...Rhe5
- 2.Sf5#
- 1...Be5
- 2.Qf4#
- 1...Qxh8!
- 1...Rae5
- 1.Sef7+?
- 1...Rae5
- 2.Sb5#
- 1...Rhe5
- 2.Sf5#
- 1...Be5
- 2.Qf4#
- 1...Qxh8!
- 1...Rae5
- 1.c7?
- threat
- 2.Sc6#
- 1...Bf4+
- 2.Qxf4#
- 1...Sxf3+
- 2.Sxf3#
- 1...Raxe5
- 2.Sb5#
- 1...Rhxe5
- 2.Sf5#
- 1...Bxe5
- 2.Qf4#
- 1...Sxb4
- 2.Qe3#
- 1...Qxh8!
- threat
- 1.Sd3+?
- Keys
- 1.cxb7!
- threat
- 2.Sc6#
- 1...Bf4+
- 2.Qxf4#
- 1...Sxf3+
- 2.Sxf3#
- 1...Raxe5
- 2.Sb5#
- 1...Rhxe5
- 2.Sf5#
- 1...Bxe5
- 2.Qf4#
- 1...Sxb4
- 2.Qe3#
- threat
- 1.cxb7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 15
- Sets
- R(g);N_GUARD::S(G)
- R(g);N_GUARD::S(G),XR(g)
- R(g);N_GUARD,P_SPINR(g),XS(E)::S(G)
- R(h);N_GUARD::S(G)
- R(h);N_GUARD,P_SPINR(h),XS(E)::S(G)
- R(h);N_GUARD::S(G),XR(h)
- R(h);N_GUARD,XQ(H)::S(G)
- B(c);N_GUARD::QAR2(H)
- B(c);CHECK,N_GUARD::QAR2(H),XB(c)
- B(c);N_GUARD,P_SPINB(c),XS(E)::QAR2(H)
- S(a);CHECK,XP(C)::B(I)+S(E),DCHECK,XS(a)
- S(b);N_GUARD::QAB1(H)
- S(b);N_GUARD::QAB1(H),XS(b)
- S(b);N_GUARD,XP(D)::QAB1(H)
- P(f);XP(C)::B(I)+S(E),DCHECK,XP(f)
- P(f);S_CUTB(c)::QAR2(H)
- P(i);XP(F)::B(I)+S(E),DCHECK,XP(i)
- Tries
- Try
- S(E);CHECK
- Vars
- R(g);P_SPINR(g)::S(G)
- R(h);P_SPINR(h)::S(G)
- B(c);P_SPINB(c)::QAR2(H)
- Refutation
- Q(j);XB(I)
- Try
- S(E);CHECK,XP(f)
- Vars
- R(g);P_SPINR(g)::S(G)
- R(h);P_SPINR(h)::S(G)
- B(c);P_SPINB(c)::QAR2(H)
- Refutation
- Q(j);XB(I)
- Try
- S(E);CHECK
- Vars
- R(g);P_SPINR(g)::S(G)
- R(h);P_SPINR(h)::S(G)
- B(c);P_SPINB(c)::QAR2(H)
- Refutation
- Q(j);XB(I)
- Try
- S(E);CHECK
- Vars
- R(g);P_SPINR(g)::S(G)
- R(h);P_SPINR(h)::S(G)
- B(c);P_SPINB(c)::QAR2(H)
- Refutation
- Q(j);XB(I)
- Try
- S(E);CHECK
- Vars
- R(g);P_SPINR(g)::S(G)
- R(h);P_SPINR(h)::S(G)
- B(c);P_SPINB(c)::QAR2(H)
- Refutation
- Q(j);XB(I)
- Try
- P(F);
- Threat
- B(I)+S(E),DCHECK
- Vars
- B(c);CHECK,N_GUARD::QAR2(H),XB(c)
- S(a);CHECK,XP(C)::B(I)+S(E),DCHECK,XS(a)
- R(g);N_GUARD,P_SPINR(g),XS(E)::S(G)
- R(h);N_GUARD,P_SPINR(h),XS(E)::S(G)
- B(c);N_GUARD,P_SPINB(c),XS(E)::QAR2(H)
- S(b);N_GUARD,XP(D)::QAB1(H)
- Refutation
- Q(j);XB(I)
- Try
- Actual
- P(F);XP(i)
- Threat
- B(I)+S(E),DCHECK
- Vars
- B(c);CHECK,N_GUARD::QAR2(H),XB(c)
- S(a);CHECK,XP(C)::B(I)+S(E),DCHECK,XS(a)
- R(g);N_GUARD,P_SPINR(g),XS(E)::S(G)
- R(h);N_GUARD,P_SPINR(h),XS(E)::S(G)
- B(c);N_GUARD,P_SPINB(c),XS(E)::QAR2(H)
- S(b);N_GUARD,XP(D)::QAB1(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).