MESON Chess Problem Database
Problem Display
PID: 87740 (4b3/N7/p7/kq3R2/5R2/3Q4/N2P4/5KB1 w - - 0 1)
Quah, James
The Problemist, 1993
#2
8 + 4
| 14772 | Creative and Imaginative Chess Concepts | 2007 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc5
- 2.Qd8#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 2.Qd8#
- 1...Qxf5
- 2.Qc3#
- 2.Qd8#
- 1...Bh5
- 2.Sc6#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...Qc5
- Tries
- 1.Ke1?
- threat
- 2.Qa3#
- 2.Qc3#
- 2.Qd8#
- 1...Qxf5
- 2.Qc3#
- 2.Qd8#
- 1...Qc5
- 2.Qd8#
- 1...Qd5
- 2.Qc3#
- 1...Bd7
- 2.Qa3#
- 2.Qc3#
- 1...Qe5+!
- threat
- 1.Kg2?
- threat
- 2.Qa3#
- 2.Qc3#
- 2.Qd8#
- 1...Bc6+
- 2.Sxc6#
- 1...Qxf5
- 2.Qc3#
- 2.Qd8#
- 1...Qc5
- 2.Qd8#
- 1...Qe5
- 2.Qc3#
- 2.Qd8#
- 1...Bd7
- 2.Qa3#
- 2.Qc3#
- 1...Qd5+!
- threat
- 1.Sc3?
- threat
- 2.Ra4#
- 1...Qxf5
- 2.Qd8#
- 1...Qc5
- 2.Qd8#
- 1...Qe5
- 2.Qd8#
- 1...Qd5!
- threat
- 1.Sxb5?
- threat
- 2.Qa3#
- 2.Qc3#
- 2.Qd8#
- 1...axb5
- 2.Qa3#
- 1...Bd7
- 2.Qa3#
- 2.Qc3#
- 1...Bxb5!
- threat
- 1.Bf2?
- 1...Qxf5
- 2.Qc3#
- 2.Qd8#
- 1...Qc5
- 2.Qd8#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 2.Qd8#
- 1...Bh5
- 2.Sc6#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...Bd7!
- 1...Qxf5
- 1.Be3?
- 1...Qxf5
- 2.Qc3#
- 2.Qd8#
- 1...Qc5
- 2.Qd8#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 2.Qd8#
- 1...Bh5
- 2.Sc6#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...Bd7!
- 1...Qxf5
- 1.Rc4?
- threat
- 2.Qa3#
- 2.Qc3#
- 2.Qd8#
- 1...Qc5
- 2.Qd8#
- 1...Bd7
- 2.Qa3#
- 2.Qc3#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 2.Qd8#
- 1...Qxf5+!
- threat
- 1.Rxb5+?
- 1...axb5
- 2.Qa3#
- 1...Bxb5!
- 1...axb5
- 1.Rg5?
- 1...Qxg5
- 2.Qc3#
- 1...Qc5
- 2.Qd8#
- 1...Qd5
- 2.Qc3#
- 1...Qe5
- 2.Qc3#
- 2.Qd8#
- 1...Qf5
- 2.Qc3#
- 2.Qd8#
- 1...Bh5
- 2.Sc6#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...Bd7!
- 1...Qxg5
- 1.Qc4?
- 1...Qxf5
- 2.Qc3#
- 2.Qb4#
- 2.Qc7#
- 1...Qc5
- 2.Qb4#
- 1...Qd5
- 2.Qc3#
- 2.Qb4#
- 2.Qc7#
- 1...Qe5
- 2.Qc3#
- 2.Qb4#
- 2.Qc7#
- 1...Bh5
- 2.Sc6#
- 1...Bc6
- 2.Sxc6#
- 1...Bg6
- 2.Sc6#
- 1...Bf7
- 2.Sc6#
- 1...Bd7!
- 1...Qxf5
- 1.Ke1?
- Keys
- 1.Sc1!
- threat
- 2.Sb3#
- 1...Qc5
- 2.Qd8#
- 1...Bf7
- 2.Sc6#
- threat
- 1.Sc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- Q(b);N_PINQ(E)::QAB(E)
- B(d);N_GUARD::S(H)
- B(d);N_GUARD::S(H),XB(d)
- Tries
- Try
- K(A);N_SPINQ(E),P-FLIGHT
- Threat
- DUALS(3)
- Vars
- Q(b);::QAB(E)
- Refutation
- Q(b);CHECK
- Try
- K(A);N_SPINQ(E),S_FLIGHT
- Threat
- DUALS(3)
- Vars
- B(d);CHECK,N_GUARD::S(H),XB(d)
- Q(b);::QAB(E)
- Refutation
- Q(b);CHECK
- Try
- S(C);
- Threat
- R1(F)
- Vars
- Q(b);N_PINQ(E),N_SPINQ(b),P_PINR(F),XR(G)::QAB(E)
- Q(b);N_PINQ(E)::QAB(E)
- Refutation
- Q(b);N_PINQ(E)
- Try
- S(H);N_SPINQ(E),XQ(b)
- Threat
- DUALS(3)
- Vars
- P(c);P_SPINP(c),XS(H)::QAR2(E)
- Refutation
- B(d);P_PINQ(E),P_SPINB(d),XS(H)
- Try
- B(B);
- Vars
- Q(b);N_PINQ(E)::QAB(E)
- B(d);N_GUARD::S(H)
- B(d);N_GUARD::S(H),XB(d)
- Refutation
- B(d);
- Try
- B(B);
- Vars
- Q(b);N_PINQ(E)::QAB(E)
- B(d);N_GUARD::S(H)
- B(d);N_GUARD::S(H),XB(d)
- Refutation
- B(d);
- Try
- R(F);N_SPINQ(E)
- Threat
- DUALS(3)
- Vars
- Q(b);::QAB(E)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XR(G)
- Try
- R(G);CHECK,N_SPINQ(E),XQ(b)
- Vars
- P(c);XR(G)::QAR2(E)
- Refutation
- B(d);P_PINQ(E),XR(G)
- Try
- R(G);
- Vars
- Q(b);N_PINQ(E),N_SPINQ(b),XR(G)::QAB(E)
- Q(b);N_PINQ(E)::QAB(E)
- B(d);N_GUARD::S(H)
- B(d);N_GUARD::S(H),XB(d)
- Refutation
- B(d);
- Try
- Q(E);
- Vars
- Q(b);N_PINQ(E)::QAB1(E)
- B(d);N_GUARD::S(H)
- B(d);N_GUARD::S(H),XB(d)
- Refutation
- B(d);
- Try
- Actual
- S(C);
- Threat
- S(C)
- Vars
- Q(b);N_PINQ(E)::QAB(E)
- B(d);N_GUARD::S(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).