MESON Chess Problem Database
Problem Display
PID: 54473 (3rB1n1/1p1P1R1b/ppk3p1/6R1/N3KQ2/8/8/8 w - - 0 1)
Sonnenfeld, Felix Alexander
Problem (Zagreb), 1958
#2
7 + 8
| 5309 | O Mosqueteiro do Rei | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Rxd7
- 2.Bxd7#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rxe8+
- 2.dxe8Q#
- 2.dxe8B#
- 1...Sf6+
- 2.Rxf6#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...Rxd7
- Tries
- 1.Kd3?
- 1...Rxd7+
- 2.Bxd7#
- 1...Rxe8
- 2.dxe8Q#
- 2.dxe8B#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sf6
- 2.Rxf6#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Rxd7+
- 1.Ke3?
- 1...Rxe8+
- 2.dxe8Q#
- 2.dxe8B#
- 1...Rxd7
- 2.Bxd7#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sf6
- 2.Rxf6#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Rxe8+
- 1.Kf3?
- 1...Rxd7
- 2.Bxd7#
- 1...Rxe8
- 2.dxe8Q#
- 2.dxe8B#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sf6
- 2.Rxf6#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Rxd7
- 1.Kd4?
- 1...Rxd7+
- 2.Bxd7#
- 1...Rxe8
- 2.dxe8Q#
- 2.dxe8B#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sf6
- 2.Rxf6#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Rxd7+
- 1.Rd5?
- threat
- 2.Qc1#
- 2.Qd6#
- 1...Rxe8+
- 2.dxe8Q#
- 2.dxe8B#
- 1...Sf6+
- 2.Rxf6#
- 1...g5+!
- threat
- 1.Qh2?
- 1...Rxe8+
- 2.dxe8Q#
- 2.dxe8B#
- 1...Sf6+
- 2.Rxf6#
- 1...Rxd7
- 2.Bxd7#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Rxe8+
- 1.Qg3?
- 1...Rxe8+
- 2.dxe8Q#
- 2.dxe8B#
- 1...Sf6+
- 2.Rxf6#
- 1...Rxd7
- 2.Bxd7#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Rxe8+
- 1.Qe5?
- 1...Sf6+
- 2.Rxf6#
- 1...Rxd7
- 2.Bxd7#
- 1...Rxe8
- 2.dxe8Q#
- 2.dxe8B#
- 1...Ra8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rb8
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Qc5#
- 1...a5!
- 1...Sf6+
- 1.Qb8?
- 1...Rxe8+
- 2.dxe8Q#
- 2.dxe8B#
- 1...Sf6+
- 2.Rxf6#
- 1...Rxd7
- 2.Bxd7#
- 1...Rxb8
- 2.d8Q#
- 2.d8R#
- 1...Rc8
- 2.dxc8Q#
- 2.dxc8S#
- 2.dxc8B#
- 2.dxc8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sh6
- 2.Rf6#
- 1...Se7
- 2.Rf6#
- 1...b5
- 2.Rc5#
- 1...a5!
- 1...Rxe8+
- 1.Kd3?
- Keys
- 1.Ke5!
- threat
- 2.Qc4#
- 1...Rxe8+
- 2.dxe8Q#
- 2.dxe8B#
- 1...Kb5
- 2.Kd6#
- 1...Kc7
- 2.Kd5#
- 1...b5
- 2.Qc1#
- threat
- 1.Ke5!
This is a version
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- R(g);OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- R(g);CHECK,OGATE,XB(G)::PXR(g)=Q
- S(h);CHECK,N_GUARD::R(F),XS(h)
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Tries
- Try
- K(B);P_SPINP(E),S_FLIGHT
- Vars
- R(g);CHECK,OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- R(g);N_PINP(E),XB(G)::PXR(g)=Q
- S(h);N_GUARD::R(F),XS(h)
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Refutation
- P(a);
- Try
- K(B);P-FLIGHT
- Vars
- R(g);CHECK,OGATE,XB(G)::PXR(g)=Q
- R(g);OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- S(h);N_GUARD::R(F),XS(h)
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Refutation
- P(a);
- Try
- K(B);S_FLIGHT
- Vars
- R(g);OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- R(g);OGATE,XB(G)::PXR(g)=Q
- S(h);N_GUARD::R(F),XS(h)
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Refutation
- P(a);
- Try
- K(B);P-FLIGHT,P_SPINP(E)
- Vars
- R(g);CHECK,OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- R(g);N_PINP(E),XB(G)::PXR(g)=Q
- S(h);N_GUARD::R(F),XS(h)
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Refutation
- P(a);
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- R(g);CHECK,OGATE,XB(G)::PXR(g)=Q
- S(h);CHECK,N_GUARD::R(F),XS(h)
- Refutation
- P(d);CHECK
- Try
- Q(C);
- Vars
- R(g);CHECK,OGATE,XB(G)::PXR(g)=Q
- S(h);CHECK,N_GUARD::R(F),XS(h)
- R(g);OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Refutation
- P(a);
- Try
- Q(C);
- Vars
- R(g);CHECK,OGATE,XB(G)::PXR(g)=Q
- S(h);CHECK,N_GUARD::R(F),XS(h)
- R(g);OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Refutation
- P(a);
- Try
- Q(C);
- Vars
- S(h);CHECK,N_GUARD::R(F),XS(h)
- R(g);OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- R(g);OGATE,P_PINQ(C),XB(G)::PXR(g)=Q
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::QAR1(C)
- Refutation
- P(a);
- Try
- Q(C);
- Vars
- R(g);CHECK,OGATE,XB(G)::PXR(g)=Q
- S(h);CHECK,N_GUARD::R(F),XS(h)
- R(g);OGATE,P_SPINR(g),XP(E)::B(G),XR(g)
- R(g);OGATE,XQ(C)::P=Q
- S(h);N_GUARD::R(F)
- P(b);N_GUARD::R1(D)
- Refutation
- P(a);
- Try
- Actual
- K(B);P-FLIGHT
- Threat
- QAR2(C)
- Vars
- R(g);CHECK,OGATE,XB(G)::PXR(g)=Q
- K(c);S_FLIGHT::R(D)+K(B)
- K(c);P-FLIGHT::QAB(C)+K(B)
- P(b);SBLOCK::QAR(C)
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).