MESON Chess Problem Database
Problem Display
PID: 207459 (1rRrk3/1Qq1P2K/1N1B4/8/b1B1R3/8/8/8 w - - 0 1)
Cristoffanini, Guido
Il Problema, 1931
#2
8 + 5
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxb6
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Qxd6
- 2.exd8Q#
- 2.exd8R#
- 1...Qxc4
- 2.exd8Q#
- 2.exd8R#
- 1...Qc5
- 2.exd8Q#
- 2.exd8R#
- 1...Qc6
- 2.exd8Q#
- 2.exd8R#
- 1...Qxe7+
- 2.Qxe7#
- 1...Bd7
- 2.exd8Q#
- 2.exd8R#
- 1...Qxb6
- Tries
- 1.Kg6?
- threat
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxb6
- 2.Bf7#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Qxc4
- 2.exd8Q#
- 2.exd8R#
- 1...Qxb7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxe7
- 2.Qxe7#
- 1...Qxc8
- 2.Bf7#
- 1...Rxb7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Rbxc8
- 2.Bf7#
- 1...Rdxc8
- 2.Bf7#
- 1...Qc5
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qc6
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qd7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Ra8
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bd1
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bc2
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bb3
- 2.exd8Q#
- 2.exd8R#
- 1...Bb5
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bc6
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bd7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxd6+!
- threat
- 1.Kg7?
- threat
- 2.Bf7#
- 1...Qxc4
- 2.exd8Q#
- 2.exd8R#
- 1...Bb3!
- threat
- 1.Kg8?
- threat
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxb6
- 2.Bf7#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Qxd6
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxb7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxe7
- 2.Bf7#
- 2.Rxe7#
- 2.Qxe7#
- 1...Qxc8
- 2.Bf7#
- 1...Rxb7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Rbxc8
- 2.Bf7#
- 1...Rdxc8
- 2.Bf7#
- 1...Qc5
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qc6
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qd7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Ra8
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bd1
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bc2
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bb3
- 2.exd8Q#
- 2.exd8R#
- 1...Bb5
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bc6
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bd7
- 2.Bf7#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxc4+!
- threat
- 1.Bxc7?
- threat
- 2.exd8Q#
- 2.exd8R#
- 1...Rxb7
- 2.Rxd8#
- 2.exd8Q#
- 2.exd8R#
- 1...Rbxc8
- 2.exd8Q#
- 2.exd8R#
- 1...Ra8
- 2.exd8Q#
- 2.exd8R#
- 1...Bd1
- 2.Qc6#
- 2.exd8Q#
- 2.exd8R#
- 1...Bc2
- 2.Qc6#
- 2.exd8Q#
- 2.exd8R#
- 1...Bb3
- 2.Qc6#
- 2.exd8Q#
- 2.exd8R#
- 1...Bb5
- 2.exd8Q#
- 2.exd8R#
- 1...Bc6
- 2.Qxc6#
- 2.exd8Q#
- 2.exd8R#
- 1...Bd7
- 2.exd8Q#
- 2.exd8R#
- 1...Rdxc8!
- threat
- 1.Rf4?
- threat
- 2.Bf7#
- 2.Rf8#
- 1...Qxe7+
- 2.Qxe7#
- 1...Qxc4
- 2.Rf8#
- 2.exd8Q#
- 2.exd8R#
- 1...Bb3
- 2.Rf8#
- 1...Bc2+!
- threat
- 1.Rg4?
- threat
- 2.Rg8#
- 1...Qxe7+
- 2.Qxe7#
- 1...Qxc4
- 2.exd8Q#
- 2.exd8R#
- 1...Bc2+!
- threat
- 1.Qd5?
- threat
- 2.Qf7#
- 2.Qg8#
- 2.Qh5#
- 1...Qxe7+
- 2.Qf7#
- 1...Qxb6
- 2.exd8Q#
- 2.exd8R#
- 1...Qxd6
- 2.Qf7#
- 2.Qg8#
- 2.exd8Q#
- 2.exd8R#
- 1...Qxc4
- 2.exd8Q#
- 2.exd8R#
- 1...Qc5
- 2.Qf7#
- 2.Qg8#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Bd1
- 2.Qf7#
- 2.Qg8#
- 1...Rxb6!
- threat
- 1.Qxc7?
- threat
- 2.Qxd8#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Rxb6
- 2.Rxd8#
- 2.Qxd8#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Rbxc8
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Rb7
- 2.Rxd8#
- 2.Qxd8#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Ra8
- 2.Qxd8#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Bd1
- 2.Qxd8#
- 2.Qc6#
- 2.Qd7#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Bc2
- 2.Qxd8#
- 2.Qc6#
- 2.Qd7#
- 2.exd8Q#
- 2.exd8R#
- 1...Bb3
- 2.Qxd8#
- 2.Qc6#
- 2.Qd7#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Bb5
- 2.Qxd8#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Bc6
- 2.Qxd8#
- 2.Qxc6#
- 2.exd8Q#
- 2.exd8R#
- 1...Bd7
- 2.Qxd8#
- 2.Qxd7#
- 2.exd8Q#
- 2.exd8R#
- 1...Rdxc8!
- threat
- 1.Kg6?
- Keys
- 1.Sd5!
- threat
- 2.Sf6#
- 1...Qxe7+
- 2.Qxe7#
- 1...Kd7
- 2.exd8Q#
- 2.exd8R#
- 1...Kf7
- 2.exd8S#
- 1...Qxd6
- 2.exd8Q#
- 2.exd8R#
- 1...Qxc4
- 2.exd8Q#
- 2.exd8R#
- threat
- 1.Sd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(b);N_PINP(F),XB(D)::PXR(d)=Q
- Q(b);N_PINP(F),XB(A)::PXR(d)=Q
- Q(b);N_PINP(F)::PXR(d)=Q
- Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::QAR1(E),XQ(b)
- B(a);N_PINP(F)::PXR(d)=Q
- Tries
- Try
- K(G);N_SPINP(F),S_FLIGHT
- Threat
- DUALS(3)
- Vars
- Q(b);XB(A)::PXR(d)=Q
- Q(b);OGATE,P_SPINQ(b),XP(F)::QAR1(E),XQ(b)
- Q(b);N_SPINR(d),XR(H)::B(A)
- R(c);N_SPINR(d),XR(H)::B(A)
- R(d);N_SPINR(d),XR(H)::B(A)
- B(a);::PXR(d)=Q
- Refutation
- Q(b);CHECK,XB(D)
- Try
- K(G);P-FLIGHT
- Threat
- B(A)
- Vars
- Q(b);N_PINP(F),XB(A)::PXR(d)=Q
- Refutation
- B(a);
- Try
- K(G);N_SPINP(F),S_FLIGHT
- Threat
- DUALS(3)
- Vars
- Q(b);N_SPINR(d),XR(H)::B(A)
- R(c);N_SPINR(d),XR(H)::B(A)
- R(d);N_SPINR(d),XR(H)::B(A)
- B(a);P_PINB(A)::PXR(d)=Q
- Refutation
- Q(b);CHECK,XB(A)
- Try
- B(D);N_SPINP(F),XQ(b)
- Threat
- PXR(d)=Q
- Vars
- R(c);N_SPINR(d),XR(H)::PXR(d)=Q
- R(c);::PXR(d)=Q
- B(a);::PXR(d)=Q
- Refutation
- R(d);N_SPINR(d),XR(H)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,OGATE,XP(F)::QAR1(E),XQ(b)
- B(a);::R1(B)
- Refutation
- B(a);CHECK
- Try
- R(B);
- Threat
- R(B)
- Vars
- Q(b);CHECK,OGATE,XP(F)::QAR1(E),XQ(b)
- Q(b);N_PINP(F),XB(A)::PXR(d)=Q
- Refutation
- B(a);CHECK
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,P_SPINQ(b),XP(F)::QAB1(E)
- Q(b);N_PINP(F),XS(C)::PXR(d)=Q
- Q(b);N_PINP(F),XB(A)::PXR(d)=Q
- Refutation
- R(c);XS(C)
- Try
- Q(E);N_SPINP(F),XQ(b)
- Threat
- DUALS(5)
- Refutation
- R(d);N_SPINR(d),XR(H)
- Try
- Actual
- S(C);
- Threat
- S(C)
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::QAR1(E),XQ(b)
- K(e);N_PINP(F),N_SPINR(d),P_SPINQ(b),S_FLIGHT::PXR(d)=Q
- K(e);N_PINP(F),N_SPINR(d),S_FLIGHT::PXR(d)=S
- Q(b);N_PINP(F),XB(D)::PXR(d)=Q
- Q(b);N_PINP(F),XB(A)::PXR(d)=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).