MESON Chess Problem Database
Problem Display
PID: 227463 (3k1q2/3BRP2/3K1B2/8/8/8/8/8 w - - 0 1)
Pape, Edouard
L'Echiquier Marseillais, 1926
#2
5 + 2
| 6490 | yacpdb | 2020 |
| 5454 | Near Snap | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qh6
- 2.Re8#
- 1...Qxe7+
- 2.Bxe7#
- 1...Qg7
- 2.Re8#
- 1...Qxf7
- 2.Rxf7#
- 2.Re8#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Qg8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Re6#
- 2.Re8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Qh8
- 2.Re8#
- 1...Qh6
- Tries
- 1.Bh4?
- 1...Qxe7+
- 2.Bxe7#
- 1...Qxf7
- 2.Rxf7#
- 2.Re8#
- 1...Qg7
- 2.Re8#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Qg8
- 2.Re8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Qh8
- 2.Re8#
- 1...Qh6+!
- 1...Qxe7+
- 1.Bg5?
- 1...Qxe7+
- 2.Bxe7#
- 1...Qxf7
- 2.Rxf7#
- 2.Re8#
- 1...Qg7
- 2.Re8#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Qg8
- 2.Re8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Qh8
- 2.Re8#
- 1...Qh6+!
- 1...Qxe7+
- 1.Bh3?
- 1...Qxe7+
- 2.Bxe7#
- 1...Qh6
- 2.Re8#
- 1...Qg7
- 2.Re8#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Qg8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra7#
- 2.Rb7#
- 2.Rc7#
- 2.Re8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Qh8
- 2.Re8#
- 1...Qxf7!
- 1...Qxe7+
- 1.Bg4?
- 1...Qxe7+
- 2.Bxe7#
- 1...Qh6
- 2.Re8#
- 1...Qg7
- 2.Re8#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Qg8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra7#
- 2.Rb7#
- 2.Rc7#
- 2.Re8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Qh8
- 2.Re8#
- 1...Qxf7!
- 1...Qxe7+
- 1.Bf5?
- 1...Qxe7+
- 2.Bxe7#
- 1...Qh6
- 2.Re8#
- 1...Qg7
- 2.Re8#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Qg8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra7#
- 2.Rb7#
- 2.Rc7#
- 2.Re8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Qh8
- 2.Re8#
- 1...Qxf7!
- 1...Qxe7+
- 1.Be6?
- 1...Qxe7+
- 2.Bxe7#
- 1...Qh6
- 2.Re8#
- 1...Qg7
- 2.Re8#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Qg8
- 2.Ra7#
- 2.Rb7#
- 2.Rc7#
- 2.Re8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Qh8
- 2.Re8#
- 1...Qxf7!
- 1...Qxe7+
- 1.Bh4?
- Keys
- 1.Kc6!
- threat
- 2.Re8#
- 1...Qxe7
- 2.f8Q#
- 2.f8R#
- 1...Qe8
- 2.Rxe8#
- 2.fxe8Q#
- 2.fxe8R#
- threat
- 1.Kc6!
Anticipated by 204556(1925)
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- Q(b);N_PINR(D),P_PINB(B)::B(B)+R(D),DCHECK
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(D)::B(B),XQ(b)
- Q(b);N_PINR(D)::B(B)+R(D),DCHECK
- Tries
- Try
- B(B);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(D)::B(B),XQ(b)
- Q(b);N_PINR(D)::B(B)+R(D),DCHECK
- Refutation
- Q(b);CHECK,N_PINR(D)
- Try
- B(B);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(D)::B(B),XQ(b)
- Q(b);N_PINR(D)::B(B)+R(D),DCHECK
- Refutation
- Q(b);CHECK,N_PINR(D)
- Try
- B(C);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(D)::B(B),XQ(b)
- Q(b);N_PINR(D),P_PINB(B)::B(B)+R(D),DCHECK
- Q(b);N_PINR(D)::B(B)+R(D),DCHECK
- Refutation
- Q(b);N_PINR(D),XP(E)
- Try
- B(C);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(D)::B(B),XQ(b)
- Q(b);N_PINR(D),P_PINB(B)::B(B)+R(D),DCHECK
- Q(b);N_PINR(D)::B(B)+R(D),DCHECK
- Refutation
- Q(b);N_PINR(D),XP(E)
- Try
- B(C);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(D)::B(B),XQ(b)
- Q(b);N_PINR(D),P_PINB(B)::B(B)+R(D),DCHECK
- Q(b);N_PINR(D)::B(B)+R(D),DCHECK
- Refutation
- Q(b);N_PINR(D),XP(E)
- Try
- B(C);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(D)::B(B),XQ(b)
- Q(b);N_PINR(D)::B(B)+R(D),DCHECK
- Refutation
- Q(b);N_PINR(D),XP(E)
- Try
- Actual
- K(A);N_SPINR(D),P-FLIGHT
- Threat
- B(B)+R(D),DCHECK
- Vars
- Q(b);OGATE,P_SPINQ(b),XR(D)::P=Q
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).