MESON Chess Problem Database
Problem Display
PID: 144355 (R2n1B2/2k2q1R/Kp2P3/1P3r2/2n1Q3/7B/8/8 w - - 0 1)
Cheylan, Yves
diagrammes, 1973
#2
8 + 6
SOLUTION
- SOUND
- Sets
- 1...Qd7
- 2.Rxd7#
- 1...Sc6
- 2.Qxc6#
- 1...Sxe6
- 2.Qc6#
- 2.Qb7#
- 1...Sb7
- 2.Qc6#
- 2.Qxb7#
- 1...Qd7
- Tries
- 1.Rxf7+?
- 1...Sxf7
- 2.Qc6#
- 2.Qb7#
- 1...Rxf7!
- 1...Sxf7
- 1.Ra7+?
- 1...Kb8
- 2.Qa8#
- 1...Kc8
- 2.Qa8#
- 1...Sb7!
- 1...Kb8
- 1.Qd5?
- threat
- 2.Qxd8#
- 1...Sxe6
- 2.Qc6#
- 2.Qb7#
- 1...Qd7
- 2.Rxd7#
- 2.Qxd7#
- 1...Sd6
- 2.Bxd6#
- 2.Qxd6#
- 1...Sc6
- 2.Qxc6#
- 1...Sb7
- 2.Qc6#
- 2.Qxb7#
- 1...Rxd5!
- threat
- 1.Qxc4+?
- 1...Sc6
- 2.Qxc6#
- 1...Rc5!
- 1...Sc6
- 1.exf7?
- threat
- 2.Qe7#
- 1...Kd7
- 2.Qe7#
- 1...Rxb5
- 2.Rc8#
- 1...Rxf7
- 2.Rc8#
- 1...Rd5
- 2.Rc8#
- 1...Re5
- 2.Rc8#
- 1...Sc6
- 2.Qxc6#
- 1...Se6
- 2.Qc6#
- 2.Qb7#
- 1...Se5!
- threat
- 1.Rxf7+?
- Keys
- 1.e7!
- threat
- 2.exd8Q#
- 1...Kd6
- 2.exd8Q#
- 1...Kd7
- 2.exd8Q#
- 1...Qxe7
- 2.Qxe7#
- 1...Rxb5
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Qd5
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Qh5
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Qe6
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Qg6
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Qe8
- 2.exd8Q#
- 2.exd8B#
- 1...Qg8
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Qf6
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rf1
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rf2
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rf3
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rf4
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rc5
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rd5
- 2.e8S#
- 1...Re5
- 2.exd8Q#
- 2.exd8B#
- 1...Rg5
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rh5
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Rf6
- 2.exd8Q#
- 2.exd8B#
- 2.e8S#
- 1...Sc6
- 2.Qxc6#
- 1...Se6
- 2.Qc6#
- 1...Sb7
- 2.Qc6#
- threat
- 1.e7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 1
- Sets
- Q(e);OGATE::R1(F),XQ(e)
- S(f);N_GUARD::QAR1(B),XS(f)
- Tries
- Try
- R(F);CHECK,XQ(e)
- Refutation
- R(b);XR(F)
- Try
- R(G);CHECK
- Vars
- K(d);N_SPINQ(e),S_FLIGHT::QAR1(B)
- K(d);N_SPINQ(e),P-FLIGHT::QAR2(B)
- Refutation
- S(f);P_SPINS(f)
- Try
- Q(B);
- Threat
- QAB1(B),XS(f)
- Vars
- S(f);N_GUARD::QAR1(B),XS(f)
- Refutation
- R(b);XQ(B)
- Try
- Q(B);CHECK,XS(a)
- Vars
- S(f);N_GUARD,P_SPINS(f)::QAR1(B),XS(f)
- Refutation
- R(b);P_SPINR(b)
- Try
- P(E);XQ(e)
- Threat
- QAR2(B)
- Vars
- K(d);P-FLIGHT,P_SPINR(b)::QAR1(B)
- R(b);XP(C)::R1(G)
- R(b);P_SPINR(b),XP(E)::R1(G)
- R(b);::R1(G)
- S(f);N_GUARD::QAR1(B),XS(f)
- Refutation
- S(a);
- Try
- Actual
- P(E);N_PINQ(e)
- Threat
- PXS(f)=Q
- Vars
- K(d);S_FLIGHT::PXS(f)=Q
- K(d);P-FLIGHT,P_SPINR(b)::PXS(f)=Q
- Q(e);OGATE,P_SPINQ(e),XP(E)::QAR2(B),XQ(e)
- Q(e);::PXS(f)=Q
- R(b);::P=S
- R(b);::PXS(f)=Q
- S(f);N_GUARD::QAR1(B),XS(f)
- S(f);N_GUARD::QAR1(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).