MESON Chess Problem Database
Problem Display
PID: 240576 (3bR2n/2r1p1P1/1Q1P1P2/1b1PkpP1/R4N2/2N2P1n/8/B1K5 w - - 0 1)
Cristoffanini, Guido
Shakhmaty i Shashki, 1930
#2
13 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxc3+
- 2.Bxc3#
- 1...Rc4
- 2.Sd3#
- 1...Ra7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Rb7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Rd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Bd3
- 2.Sxd3#
- 1...Bxa4
- 2.Sd3#
- 1...Bc4
- 2.Sce2#
- 1...Bc6
- 2.Sb5#
- 1...Bd7
- 2.Sd3#
- 1...Bxe8
- 2.Sd3#
- 1...Sg6
- 2.Sxg6#
- 1...Sf7
- 2.Sg6#
- 1...e6
- 2.Rxe6#
- 1...Rxc3+
- Tries
- 1.Rc4?
- threat
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sa4#
- 2.Sxb5#
- 2.Sd3#
- 1...Rxc4
- 2.Sd3#
- 1...Bxc4
- 2.Sce2#
- 1...Bxe8
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sa4#
- 2.Sb5#
- 2.Sd3#
- 1...Sxg5
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sa4#
- 2.Sxb5#
- 1...Rc6
- 2.Sxb5#
- 1...Bc6
- 2.Sb5#
- 1...Ra7
- 2.Sa2#
- 2.Sa4#
- 2.Sd3#
- 1...Ba4
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxa4#
- 2.Sb5#
- 2.Sd3#
- 1...Ba6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sa4#
- 2.Sb5#
- 2.Sd3#
- 1...Bd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sa4#
- 2.Sb5#
- 2.Sd3#
- 1...Sf2
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sa4#
- 2.Sxb5#
- 1...Sxf4!
- threat
- 1.Rxe7+?
- 1...Rxe7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Bxe7!
- 1...Rxe7
- 1.Rxd8?
- threat
- 2.Qe3#
- 2.Qd4#
- 1...Rxc3+
- 2.Bxc3#
- 1...Bxa4
- 2.Sd3#
- 2.Qe3#
- 1...Sxg5
- 2.Qd4#
- 1...Rc4
- 2.Sd3#
- 1...Bc4
- 2.Sce2#
- 2.Qe3#
- 1...Rd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Bd3
- 2.Sxd3#
- 2.Qd4#
- 1...Bd7
- 2.Sd3#
- 1...Sf2
- 2.Qd4#
- 1...Rc5!
- threat
- 1.Qc5?
- threat
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Bxa4
- 2.Sce2#
- 2.Sd3#
- 1...Bxe8
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 1...Bc4
- 2.Sce2#
- 1...Bf1
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 1...Be2
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Scxe2#
- 2.Sb5#
- 1...Bd3
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sxd3#
- 1...Ba6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 1...Bc6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 2.dxc6#
- 1...Bd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 1...Rxc5!
- threat
- 1.Qxc7?
- threat
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Bxa4
- 2.Sce2#
- 1...Bxe8
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 1...Bxc7
- 2.Sxb5#
- 1...Bc4
- 2.Sce2#
- 1...Bf1
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 1...Be2
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Scxe2#
- 2.Sb5#
- 1...Bd3
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sxd3#
- 1...Ba6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 1...Bc6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 1...Bd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 1...Sxf4!
- threat
- 1.Qc6?
- threat
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Bxa4
- 2.Sce2#
- 1...Bxc6
- 2.Sb5#
- 1...Bc4
- 2.Sce2#
- 1...Bf1
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 1...Be2
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Scxe2#
- 2.Sb5#
- 1...Bd3
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sxd3#
- 1...Ba6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 1...Rxc6!
- threat
- 1.dxc7?
- threat
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.Qe6#
- 1...Bxa4
- 2.Sce2#
- 2.Sd3#
- 1...Bxe8
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 2.Qe6#
- 1...Sxg5
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 1...Bc4
- 2.Sce2#
- 1...Bc6
- 2.Sb5#
- 1...Bf1
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Qe6#
- 1...Be2
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Scxe2#
- 2.Sb5#
- 2.Qe6#
- 1...Bd3
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sxd3#
- 2.Qe6#
- 1...Ba6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Qe6#
- 1...Bd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sb5#
- 2.Sd3#
- 1...e6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.Rxe6#
- 2.Qxe6#
- 1...Sxf4!
- threat
- 1.f7?
- threat
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxc3+
- 2.Bxc3#
- 1...Bxa4
- 2.Sd3#
- 1...Bxe8
- 2.Sd3#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxf4
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxg5
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxf7
- 2.Sg6#
- 1...Rc4
- 2.Sd3#
- 1...Bc4
- 2.Sce2#
- 1...Bc6
- 2.Sb5#
- 1...Rc5
- 2.gxh8Q#
- 2.gxh8B#
- 1...Ra7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rb7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rc8
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bf1
- 2.gxh8Q#
- 2.gxh8B#
- 1...Be2
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bd3
- 2.Sxd3#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Ba6
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bd7
- 2.Sd3#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sg1
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sf2
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sg6
- 2.Sxg6#
- 1...e6
- 2.Rxe6#
- 1...Rc6!
- threat
- 1.gxh8Q?
- threat
- 2.Sg6#
- 2.fxe7#
- 2.f7#
- 1...Rxc3+
- 2.Bxc3#
- 1...Bxa4
- 2.Sd3#
- 2.Sg6#
- 1...Bxe8
- 2.Sd3#
- 2.fxe7#
- 2.f7#
- 1...Sxf4
- 2.fxe7#
- 2.f7#
- 1...Rc4
- 2.Sd3#
- 2.Sg6#
- 1...Bc4
- 2.Sce2#
- 2.Sg6#
- 1...Bc6
- 2.Sb5#
- 1...e6
- 2.Sg6#
- 2.Rxe6#
- 1...Rc6!
- threat
- 1.gxh8S?
- threat
- 2.Sfg6#
- 2.Shg6#
- 2.Sf7#
- 1...Rxc3+
- 2.Bxc3#
- 1...Bxa4
- 2.Sd3#
- 2.Sfg6#
- 2.Shg6#
- 1...Bxe8
- 2.Sd3#
- 1...Sxf4
- 2.Sf7#
- 1...Rc4
- 2.Sd3#
- 2.Sfg6#
- 2.Shg6#
- 1...Rc6
- 2.Sf7#
- 1...Bc4
- 2.Sce2#
- 2.Sfg6#
- 2.Shg6#
- 1...Bc6
- 2.Sb5#
- 2.Sf7#
- 1...e6
- 2.Sfg6#
- 2.Shg6#
- 2.Rxe6#
- 1...Sxg5!
- threat
- 1.gxh8B?
- threat
- 2.Sg6#
- 2.fxe7#
- 2.f7#
- 1...Rxc3+
- 2.Bxc3#
- 1...Bxa4
- 2.Sd3#
- 2.Sg6#
- 1...Bxe8
- 2.Sd3#
- 2.fxe7#
- 2.f7#
- 1...Sxf4
- 2.fxe7#
- 2.f7#
- 1...Rc4
- 2.Sd3#
- 2.Sg6#
- 1...Bc4
- 2.Sce2#
- 2.Sg6#
- 1...Bc6
- 2.Sb5#
- 1...e6
- 2.Sg6#
- 2.Rxe6#
- 1...Rc6!
- threat
- 1.Rc4?
- Keys
- 1.fxe7!
- threat
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxc3+
- 2.Bxc3#
- 1...Rxe7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxa4
- 2.Sd3#
- 1...Bxe8
- 2.Sd3#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxe7
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxf4
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxg5
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rc4
- 2.Sd3#
- 1...Rc6
- 2.exd8Q#
- 2.exd8R#
- 1...Bc4
- 2.Sce2#
- 1...Bc6
- 2.Sb5#
- 1...Rc5
- 2.gxh8Q#
- 2.gxh8B#
- 1...Ra7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rb7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rd7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Sce2#
- 2.Sxb5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rc8
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bf1
- 2.gxh8Q#
- 2.gxh8B#
- 1...Be2
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bd3
- 2.Sxd3#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Ba6
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bd7
- 2.Sd3#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sg1
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sf2
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sg6
- 2.Sxg6#
- 1...Sf7
- 2.Sg6#
- threat
- 1.fxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(A),XR(e)
- R(e);S_CUTB(b)::S(F)
- B(b);N_GUARD::S(F),XB(b)
- B(b);N_GUARD,XR(E)::S(F)
- B(b);N_PINS(C)::B(A)+S(C)
- B(b);N_GUARD::S(F)
- B(b);N_GUARD,N_SPINP(f),XR(M)::S(F)
- S(h);N_GUARD::S(F),XS(h)
- S(h);N_GUARD::S(F)
- P(f);OGATE::R1(M),XP(f)
- Tries
- Try
- R(E);N_SPINS(C)
- Threat
- DUALS(7)
- Vars
- R(e);P_PINS(C),XR(E)::S(F)
- B(b);XR(E)::B(A)+S(C)
- R(e);::B(A)+S(C),XB(b)
- B(b);::B(A)+S(C)
- Refutation
- S(a);XS(F)
- Try
- R(M);CHECK,XP(f)
- Refutation
- B(g);XR(M)
- Try
- R(M);N_PINP(f),XB(g)
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(A),XR(e)
- S(a);XP(H)::QAB1(I)
- R(e);S_CUTB(b)::S(F)
- B(b);N_GUARD::S(F)
- S(a);::QAB1(I)
- Refutation
- R(e);
- Try
- Q(I);N_SPINS(C)
- Threat
- DUALS(5)
- Vars
- B(b);::B(A)+S(C)
- Refutation
- R(e);P_PINS(C),XQ(I)
- Try
- Q(I);N_SPINS(C),XR(e)
- Threat
- DUALS(5)
- Vars
- B(b);XR(E)::B(A)+S(C)
- B(g);XQ(I)::B(A)+S(C),XB(b)
- B(b);::B(A)+S(C)
- Refutation
- S(a);XS(F)
- Try
- Q(I);N_SPINS(C)
- Threat
- DUALS(5)
- Vars
- B(b);XR(E)::B(A)+S(C)
- B(b);XQ(I)::B(A)+S(C)
- B(b);::B(A)+S(C)
- Refutation
- R(e);P_PINS(C),XQ(I)
- Try
- P(J);N_SPINS(C),XR(e)
- Threat
- DUALS(6)
- Vars
- B(b);::B(A)+S(C)
- Refutation
- S(a);XS(F)
- Try
- P(K);
- Threat
- PXS(h)=Q
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(A),XR(e)
- B(b);N_GUARD,XR(E)::S(F)
- S(a);XS(F)::PXS(h)=Q
- S(a);XP(H)::PXS(h)=Q
- S(h);N_GUARD,XP(K)::S(F)
- R(e);S_CUTB(b)::S(F)
- B(b);N_PINS(C)::B(A)+S(C)
- R(e);::PXS(h)=Q
- B(b);::PXS(h)=Q
- S(a);::PXS(h)=Q
- S(h);N_GUARD::S(F),XS(h)
- P(f);OGATE::R1(M),XP(f)
- Refutation
- R(e);
- Try
- P(L);XS(h)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(A),XR(e)
- B(b);N_PINS(C)::B(A)+S(C)
- Refutation
- R(e);
- Try
- P(L);XS(h)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(A),XR(e)
- B(b);N_GUARD,N_SPINP(f),XR(M)::S(F)
- S(a);XS(F)::S(L)
- R(e);::S(L)
- Refutation
- S(a);XP(H)
- Try
- P(L);XS(h)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(A),XR(e)
- B(b);N_PINS(C)::B(A)+S(C)
- Refutation
- R(e);
- Try
- Actual
- P(K);XP(f)
- Threat
- PXS(h)=Q
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(A),XR(e)
- B(b);N_GUARD,XR(E)::S(F)
- B(g);P_SPINB(g),XP(K)::PXS(h)=Q
- S(a);XS(F)::PXS(h)=Q
- S(a);XP(H)::PXS(h)=Q
- R(e);S_CUTB(b)::S(F)
- R(e);N_GUARD,S_CUTB(b)::PXB(g)=Q
- B(b);N_PINS(C)::B(A)+S(C)
- R(e);::PXS(h)=Q
- B(b);::PXS(h)=Q
- S(a);::PXS(h)=Q
- S(h);N_GUARD::S(F),XS(h)
- S(h);N_GUARD::S(F)
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).