MESON Chess Problem Database
Problem Display
PID: 176291 (1RnK1kq1/n4PrR/2p3BB/1p1P3b/5Q1N/8/8/8 w - - 0 1)
Cheylan, Yves
Schach-Echo, 1972
#2
9 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxf7
- 2.Rh8#
- 2.Qxf7#
- 1...Qh8
- 2.Rxh8#
- 1...Bxg6
- 2.Sxg6#
- 1...Sb6
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Qxf7
- Tries
- 1.Kd7?
- threat
- 2.Qd6#
- 1...Qxf7+
- 2.Qxf7#
- 1...Bxg6
- 2.Sxg6#
- 1...Bg4+!
- threat
- 1.Rxg7?
- threat
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Qxf7
- 2.Qxf7#
- 1...Bxg6
- 2.Sxg6#
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...cxd5
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Qh7
- 2.Rxh7#
- 2.Rg8#
- 1...Qh8
- 2.Rg8#
- 1...Bd1
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Be2
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Bf3
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Bg4
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Sb6
- 2.Rxg8#
- 2.Qd6#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Sd6
- 2.Rxg8#
- 2.Qxd6#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Se7
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...b4
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...c5
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Qxg7!
- threat
- 1.Rh8?
- threat
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Bxg6
- 2.Sxg6#
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...cxd5
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Bd1
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Be2
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Bf3
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Bg4
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Sb6
- 2.Rxg8#
- 2.Qd6#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Sd6
- 2.Rxg8#
- 2.Qxd6#
- 2.fxg8Q#
- 2.fxg8R#
- 1...Se7
- 2.fxg8Q#
- 2.fxg8R#
- 1...b4
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...c5
- 2.Rxg8#
- 2.fxg8Q#
- 2.fxg8S#
- 2.fxg8B#
- 2.fxg8R#
- 1...Qxh8!
- threat
- 1.Rxc8?
- threat
- 2.Qd6#
- 1...Qxf7
- 2.Rh8#
- 2.Qxf7#
- 1...Bxg6
- 2.Sxg6#
- 1...Sxc8!
- threat
- 1.Qe3?
- threat
- 2.Qe8#
- 1...Sd6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Qxf7!
- threat
- 1.Qe5?
- threat
- 2.Qe8#
- 1...Sd6
- 2.Qxd6#
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Qxf7!
- threat
- 1.Qd6+?
- 1...Se7
- 2.Qxe7#
- 1...Sxd6!
- 1...Se7
- 1.Qb4+?
- 1...Sd6
- 2.Qxd6#
- 1...Se7
- 2.Qxe7#
- 1...c5!
- 1...Sd6
- 1.Qe4?
- threat
- 2.Qe8#
- 1...Sd6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Qxf7!
- threat
- 1.Kd7?
- Keys
- 1.Kc7!
- threat
- 2.Qd6#
- 1...Qxf7+
- 2.Qxf7#
- 1...Ke7
- 2.fxg8S#
- 1...Bxg6
- 2.Sxg6#
- threat
- 1.Kc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- Q(h);OGATEB::R(G),XQ(h)
- B(b);XB(D)::S(B),XB(b)
- S(f);N_GUARD::QAB(A)
- S(f);N_GUARD::QAB(A),XS(f)
- Tries
- Try
- K(I);P-FLIGHT,P_PINS(f),P_SPINP(F)
- Threat
- QAB(A)
- Vars
- Q(h);CHECK,OGATE,P_SPINQ(h),XP(F)::QAR1(A),XQ(h)
- B(b);XB(D)::S(B),XB(b)
- Refutation
- B(b);CHECK
- Try
- R(G);XR(e)
- Threat
- DUALS(5)
- Vars
- Q(h);OGATE,P_SPINQ(h),XP(F)::QAR1(A),XQ(h)
- Q(h);::B(E)+R(G),DCHECK
- Refutation
- Q(h);P_SPINQ(h),XR(G)
- Try
- R(G);P_PINQ(h)
- Threat
- DUALS(5)
- Vars
- S(f);::PXQ(h)=Q
- Refutation
- Q(h);N_SPINQ(h),XR(G)
- Try
- R(H);XS(f)
- Threat
- QAB(A)
- Vars
- B(b);XB(D)::S(B),XB(b)
- Refutation
- S(d);XR(H)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- S(f);N_GUARD::QAB1(A)
- S(f);N_GUARD::QAB1(A),XS(f)
- Refutation
- Q(h);XP(F)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- S(f);N_GUARD::QAB1(A),XS(f)
- Refutation
- Q(h);XP(F)
- Try
- Q(A);CHECK
- Vars
- S(f);N_GUARD,P_SPINS(f)::QAB1(A),XS(f)
- Refutation
- S(f);XQ(A)
- Try
- Q(A);CHECK
- Vars
- S(f);N_GUARD,P_SPINS(f)::QAB(A),XS(f)
- S(f);N_GUARD,P_SPINS(f)::QAB1(A),XS(f)
- Refutation
- P(c);P_SPINP(c)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- S(f);N_GUARD::QAB1(A)
- S(f);N_GUARD::QAB1(A),XS(f)
- Refutation
- Q(h);XP(F)
- Try
- Actual
- K(I);P_PINS(f),P_SPINP(F),S_FLIGHT
- Threat
- QAB(A)
- Vars
- Q(h);CHECK,OGATE,P_SPINQ(h),XP(F)::QAR1(A),XQ(h)
- K(g);N_PINP(F),N_SPINR(e),N_SPINS(f),S_FLIGHT::PXQ(h)=S
- B(b);XB(D)::S(B),XB(b)
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).