MESON Chess Problem Database
Problem Display
PID: 16649 (7q/2pB2p1/2P2pP1/RN1Pk3/1BpR3Q/2n5/7b/4NKn1 w - - 0 1)
Carwardine, JA
Chess, 1942
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qa8
- 2.Qxh2#
- 1...Qb8
- 2.Qxh2#
- 1...Qc8
- 2.Qxh2#
- 1...Qd8
- 2.Qxh2#
- 1...Qe8
- 2.Qxh2#
- 1...Qf8
- 2.Qxh2#
- 1...Qg8
- 2.Qxh2#
- 1...Bg3
- 2.Qxg3#
- 1...Bf4
- 2.Qxf4#
- 1...Sge2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sa2
- 2.Qe4#
- 1...Sce2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sxb5
- 2.Qe4#
- 1...Sxd5
- 2.Re4#
- 2.Qe4#
- 1...f5
- 2.Qe7#
- 1...Qa8
- Tries
- 1.Sa3?
- threat
- 2.Sxc4#
- 1...Bf4
- 2.Qxf4#
- 1...Se4
- 2.Rxe4#
- 2.Qxe4#
- 1...Qxh4!
- threat
- 1.Sxc3?
- threat
- 2.Re4#
- 2.Qe4#
- 2.d6#
- 1...Bf4
- 2.Re4#
- 2.Qxf4#
- 1...Qa8
- 2.Re4#
- 2.Qe4#
- 1...Qb8
- 2.Re4#
- 2.Qe4#
- 1...Qg8
- 2.Re4#
- 2.Qe4#
- 1...f5
- 2.d6#
- 1...Qxh4!
- threat
- 1.Bxc3?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Qe4#
- 1...Bf4
- 2.Qxf4#
- 1...Se2
- 2.Sf3#
- 2.Qe4#
- 1...Sf3
- 2.Sxf3#
- 2.Qe4#
- 1...f5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Qe7#
- 1...Qxh4!
- threat
- 1.Re4+?
- 1...Kxd5
- 2.Sxc3#
- 2.Sxc7#
- 1...Sxe4!
- 1...Kxd5
- 1.Qg5+?
- 1...f5
- 2.Qe7#
- 2.Qxf5#
- 1...fxg5!
- 1...f5
- 1.Qh3?
- threat
- 2.Qf5#
- 2.Qe6#
- 1...Sxh3
- 2.Sf3#
- 1...Sxb5
- 2.Qe3#
- 1...Se4
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...Qh5
- 2.Qe6#
- 1...Qe8
- 2.Qf5#
- 2.Qxh2#
- 1...Qg8
- 2.Qf5#
- 2.Qxh2#
- 1...Qxh3+!
- threat
- 1.Qg4?
- threat
- 2.Qf5#
- 2.Qe6#
- 1...Sxb5
- 2.Qe4#
- 1...f5
- 2.Qxf5#
- 1...Qh5
- 2.Qe6#
- 1...Qe8
- 2.Qf5#
- 1...Qg8
- 2.Qf5#
- 1...Se4
- 2.Qf5#
- 2.Qxe4#
- 1...Qh3+!
- threat
- 1.Qh5+?
- 1...f5
- 2.Qxf5#
- 1...Qxh5!
- 1...f5
- 1.d6?
- threat
- 2.Sxc3#
- 1...Sxb5
- 2.Rxb5#
- 2.Qe4#
- 1...cxd6
- 2.Bxd6#
- 1...Qa8
- 2.Qxh2#
- 1...Qb8
- 2.Qxh2#
- 1...Qg8
- 2.Qxh2#
- 1...Bf4
- 2.Qxf4#
- 1...Sb1
- 2.Sa3#
- 2.Sc3#
- 2.Sa7#
- 2.Sxc7#
- 2.Qe4#
- 1...Sd1
- 2.Sa3#
- 2.Sc3#
- 2.Sa7#
- 2.Sxc7#
- 2.Qe4#
- 1...Sa2
- 2.Sa3#
- 2.Sc3#
- 2.Sa7#
- 2.Sxc7#
- 2.Qe4#
- 1...Sce2
- 2.Sa3#
- 2.Sc3#
- 2.Sa7#
- 2.Sxc7#
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sd5
- 2.Re4#
- 2.Qe4#
- 1...Qxh4!
- threat
- 1.Sa3?
- Keys
- 1.Ra8!
- 1...Qxh4
- 2.Re8#
- 1...Qxa8
- 2.Qxh2#
- 1...Sxb5
- 2.Qe4#
- 1...Sxd5
- 2.Re4#
- 2.Qe4#
- 1...Qh5
- 2.Re8#
- 1...Qh6
- 2.Re8#
- 1...Qh7
- 2.Re8#
- 1...Qb8
- 2.Qxh2#
- 1...Qc8
- 2.Qxh2#
- 1...Qd8
- 2.Qxh2#
- 1...Qe8
- 2.Rxe8#
- 2.Qxh2#
- 1...Qf8
- 2.Qxh2#
- 1...Qg8
- 2.Qxh2#
- 1...Bg3
- 2.Qxg3#
- 1...Bf4
- 2.Qxf4#
- 1...Sge2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sh3
- 2.Sf3#
- 1...Sb1
- 2.Qe4#
- 1...Sd1
- 2.Qe4#
- 1...Sa2
- 2.Qe4#
- 1...Sce2
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...f5
- 2.Qe7#
- 1...Qxh4
- 1.Ra8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(i);N_GUARD::QAB(E),XB(b)
- B(b);N_GUARD::QAB(E),XB(b)
- B(b);N_GUARD::QAB1(E),XB(b)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(c);N_GUARD::QAR1(E)
- S(c);N_GUARD::QAR1(E),XS(c)
- S(c);N_GUARD,XS(G)::QAR1(E)
- P(f);OGATE::QAR2(E)
- Tries
- Try
- S(G);
- Threat
- S(G),XP(d)
- Vars
- B(b);N_GUARD::QAB1(E),XB(b)
- Refutation
- Q(i);XQ(E)
- Try
- S(G);XS(c)
- Threat
- DUALS(3)
- Vars
- P(f);::R(F)+P(H)
- Refutation
- Q(i);XQ(E)
- Try
- B(C);XS(c)
- Threat
- DUALS(4)
- Vars
- B(b);N_GUARD::QAB1(E),XB(b)
- Refutation
- Q(i);XQ(E)
- Try
- R(D);CHECK
- Refutation
- S(c);XR(D)
- Try
- Q(E);CHECK
- Refutation
- P(f);XQ(E)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD,XQ(E)::S(A)
- S(c);N_GUARD,XS(G)::QAR2(E)
- S(c);::QAR1(E)
- P(f);::QAR1(E),XP(f)
- Q(i);::QAR1(E)
- Refutation
- Q(i);CHECK,XQ(E)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD,XS(G)::QAR1(E)
- P(f);::QAR1(E),XP(f)
- Q(i);::QAR1(E)
- Refutation
- Q(i);CHECK
- Try
- Q(E);CHECK
- Vars
- P(f);P_SPINP(f)::QAR1(E),XP(f)
- Refutation
- Q(i);XQ(E)
- Try
- P(H);
- Threat
- R(F)+S(G),XS(c)
- Vars
- P(g);OGATE,XP(H)::B(C),XP(g)
- Q(i);N_GUARD::QAB(E),XB(b)
- B(b);N_GUARD::QAB1(E),XB(b)
- S(c);N_GUARD::QAR1(E)
- S(c);N_GUARD::QAR1(E),XS(c)
- Refutation
- Q(i);XQ(E)
- Try
- Actual
- R(F);
- Vars
- Q(i);N_GUARD,XQ(E)::R(F)
- Q(i);N_GUARD,XR(F)::QAB(E),XB(b)
- S(c);N_GUARD,XS(G)::QAR1(E)
- Q(i);N_GUARD::R(F)
- Q(i);N_GUARD::QAB(E),XB(b)
- B(b);N_GUARD::QAB(E),XB(b)
- B(b);N_GUARD::QAB1(E),XB(b)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(c);N_GUARD::QAR1(E)
- S(c);N_GUARD::QAR1(E),XS(c)
- P(f);OGATE::QAR2(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).