MESON Chess Problem Database
Problem Display
PID: 500 (2kr2R1/1r6/N3P2P/2p5/2P5/1P4Q1/7K/8 w - - 0 1)
Mansfield, Comins
The Observer, 1957
#2
8 + 4
| 3550 | Complete Mansfield/II | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Rxb3
- 2.Qc7#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rxg8
- 2.Qxg8#
- 1...Rxb3
- Tries
- 1.Kg1?
- 1...Rxb3
- 2.Qc7#
- 1...Rxg8
- 2.Qxg8#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rg7!
- 1...Rxb3
- 1.Kg2?
- 1...Rxb3
- 2.Qc7#
- 1...Rxg8
- 2.Qxg8#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rg7!
- 1...Rxb3
- 1.Kh3?
- 1...Rxg8
- 2.Qxg8#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rxb3!
- 1...Rxg8
- 1.Re8?
- 1...Rxb3
- 2.Qc7#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Rxe8!
- 1...Rxb3
- 1.Rf8?
- 1...Rxb3
- 2.Qc7#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rxf8!
- 1...Rxb3
- 1.Rh8?
- 1...Rxb3
- 2.Qc7#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rg8
- 2.Rxg8#
- 2.Qxg8#
- 1...Rxh8!
- 1...Rxb3
- 1.Qf4?
- 1...Rxb3
- 2.Qc7#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 2.Qxf8#
- 1...Rxg8!
- 1...Rxb3
- 1.Qe5?
- 1...Rxb3
- 2.Qc7#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rxg8!
- 1...Rxb3
- 1.Qd6?
- threat
- 2.Rxd8#
- 2.Qxd8#
- 1...Rxb3
- 2.Qc7#
- 2.Qc6#
- 2.Qd7#
- 1...Rb4
- 2.Qc7#
- 2.Qc6#
- 2.Qd7#
- 1...Rb5
- 2.Qc7#
- 2.Qc6#
- 2.Qd7#
- 1...Rb6
- 2.Qc7#
- 2.Qd7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 2.Qxd7#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 2.Qc6#
- 2.Qd7#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 2.Qxf8#
- 1...Rxg8!
- threat
- 1.b4?
- 1...Rxb4
- 2.Qc7#
- 1...Rxg8
- 2.Qxg8#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...cxb4!
- 1...Rxb4
- 1.h7?
- 1...Rxb3
- 2.Qc7#
- 1...Rxg8
- 2.Qxg8#
- 2.hxg8Q#
- 2.hxg8R#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rxh7+!
- 1...Rxb3
- 1.Kg1?
- Keys
- 1.Kh1!
- 1...Rxb3
- 2.Qc7#
- 1...Rxg8
- 2.Qxg8#
- 1...Rb4
- 2.Qc7#
- 1...Rb5
- 2.Qc7#
- 1...Rb6
- 2.Qc7#
- 1...Ra7
- 2.Qb8#
- 1...Rc7
- 2.Qxc7#
- 1...Rd7
- 2.Qb8#
- 1...Re7
- 2.Qb8#
- 1...Rf7
- 2.Qb8#
- 1...Rg7
- 2.Qb8#
- 1...Rh7
- 2.Qb8#
- 1...Rb8
- 2.Qc7#
- 2.Qxb8#
- 1...Re8
- 2.Rxe8#
- 1...Rf8
- 2.Rxf8#
- 1...Rxb3
- 1.Kh1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- R(d);N_SPINR(d),OGATE,XR(H)::QAR(C),XR(d)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(d);N_SPINR(d),OGATE,P_PINQ(C),XR(H)::QAR(C),XR(d)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(b);P_PINQ(C)
- Try
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(d);N_SPINR(d),OGATE,P_PINQ(C),XR(H)::QAR(C),XR(d)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(b);P_PINQ(C)
- Try
- K(A);P-FLIGHT
- Vars
- R(d);N_SPINR(d),OGATE,XR(H)::QAR(C),XR(d)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(b);P_PINQ(C),XP(B)
- Try
- R(H);
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- Refutation
- R(d);N_SPINR(d),XR(H)
- Try
- R(H);
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(d);N_SPINR(d),XR(H)
- Try
- R(H);
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(d);N_SPINR(d),P_PINP(G),XR(H)
- Try
- Q(C);
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(d);N_SPINR(d),XR(H)
- Try
- Q(C);
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(d);N_SPINR(d),XR(H)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(d);N_SPINR(d),XR(H)
- Try
- P(B);
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(d);N_SPINR(d),OGATE,XR(H)::QAR(C),XR(d)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- P(a);XP(B)
- Try
- P(G);
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(d);OGATEB::R(H),XR(d)
- Refutation
- R(b);CHECK,XP(G)
- Try
- Actual
- K(A);P-FLIGHT
- Vars
- R(b);N_GUARD,XP(B)::QAR1(C)
- R(d);N_SPINR(d),OGATE,XR(H)::QAR(C),XR(d)
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(b);N_GUARD,P_PINP(G)::QAR1(C)
- R(d);OGATEB::R(H),XR(d)
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).