MESON Chess Problem Database
Problem Display
PID: 274134 (1Bn3q1/RP1k1n1N/8/3B1N2/7Q/8/8/1K1R4 w - - 0 1)
Becker, Chris
diagrammes, 1979
#2
9 + 4
SOLUTION
- SOUND
- Sets
- 1...Ke8
- 2.Bc6#
- 1...Qd8
- 2.Qa4#
- 1...Sd8
- 2.Sf6#
- 1...Sb6
- 2.Qe7#
- 1...Sd6
- 2.Qe7#
- 1...Sxa7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Ke8
- Tries
- 1.Bh1+?
- 1...Ke6
- 2.Qf6#
- 1...Ke8
- 2.Bc6#
- 2.Qa4#
- 1...Scd6
- 2.Qe7#
- 1...Sfd6!
- 1...Ke6
- 1.Bg2+?
- 1...Ke6
- 2.Qf6#
- 1...Ke8
- 2.Bc6#
- 2.Qa4#
- 1...Scd6
- 2.Qe7#
- 1...Sfd6!
- 1...Ke6
- 1.Bf3+?
- 1...Ke6
- 2.Qf6#
- 1...Ke8
- 2.Bc6#
- 2.Qa4#
- 1...Scd6
- 2.Qe7#
- 1...Sfd6!
- 1...Ke6
- 1.Be4+?
- 1...Ke6
- 2.Qf6#
- 1...Ke8
- 2.Bc6#
- 1...Scd6
- 2.Qe7#
- 1...Sfd6!
- 1...Ke6
- 1.Bc6+?
- 1...Ke6
- 2.Sd4#
- 2.Bd7#
- 2.Qf6#
- 1...Kxc6!
- 1...Ke6
- 1.Be6+?
- 1...Kxe6
- 2.Qf6#
- 1...Ke8
- 2.Bd7#
- 2.Qa4#
- 1...Kc6!
- 1...Kxe6
- 1.Bxf7+?
- 1...Sd6
- 2.Rxd6#
- 1...Kc6!
- 1...Sd6
- 1.Qf6?
- threat
- 2.Bc6#
- 1...Ke8
- 2.Bc6#
- 1...Scd6
- 2.Qe7#
- 1...Sfd6!
- threat
- 1.Qc4?
- threat
- 2.Bc6#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Kd8
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Ke8
- 2.Bc6#
- 1...Qxh7
- 2.Bc6#
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sxa7
- 2.Bc6#
- 2.Bxf7#
- 1...Sfd6
- 2.bxc8Q#
- 1...Qg2
- 2.Bc6#
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg4
- 2.Bc6#
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg5
- 2.Bc6#
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg6
- 2.Bc6#
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg7
- 2.Bc6#
- 2.Qxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qd8
- 2.Bc6#
- 2.Qb5#
- 2.Qa4#
- 2.Qc6#
- 1...Qe8
- 2.Bc6#
- 2.Be6#
- 2.Qc7#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qf8
- 2.Bc6#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qh8
- 2.Bc6#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Se5
- 2.Bc6#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sg5
- 2.Bc6#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sh6
- 2.Bc6#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sd8
- 2.Sf6#
- 2.Bc6#
- 1...Sh8
- 2.Bc6#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sb6
- 2.Bc6#
- 1...Se7
- 2.Bc6#
- 1...Scd6!
- threat
- 1.bxc8S+?
- 1...Ke8
- 2.Bc6#
- 2.Qe7#
- 1...Kxc8!
- 1...Ke8
- 1.bxc8B+?
- 1...Ke8
- 2.Bc6#
- 2.Bd7#
- 2.Qe7#
- 1...Kxc8!
- 1...Ke8
- 1.Bh1+?
- Keys
- 1.Rc1!
- threat
- 2.bxc8Q#
- 2.bxc8R#
- 1...Ke8
- 2.Bc6#
- 1...Qxh7
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sxa7
- 2.Qe7#
- 1...Qg5
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sg5
- 2.bxc8Q#
- 2.bxc8R#
- 1...Se7
- 2.Qxe7#
- 1...Qg2
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg4
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg6
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg7
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qd8
- 2.Qa4#
- 1...Qe8
- 2.Rc7#
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Qf8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qh8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Se5
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sh6
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sd8
- 2.Sf6#
- 1...Sh8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sb6
- 2.Qe7#
- 1...Scd6
- 2.Qe7#
- threat
- 1.Rc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(a);N_GUARD,S_FLIGHT::B(D)
- Q(d);SBLOCK::QAB(C)
- S(b);SBLOCK::S(H)
- S(c);N_GUARD::QAR1(C)
- S(c);N_GUARD,XR(F)::QAR1(C)
- S(c);N_GUARD::QAR1(C),XS(c)
- Tries
- Try
- B(D);CHECK
- Vars
- K(a);N_GUARD,S_CUTS(b),S_CUTS(c),S_FLIGHT::QAR1(C)
- S(c);P_SPINS(c)::QAR1(C)
- Refutation
- S(b);P_SPINS(b)
- Try
- B(D);CHECK
- Vars
- K(a);N_GUARD,S_CUTS(b),S_CUTS(c),S_FLIGHT::QAR1(C)
- S(c);P_SPINS(c)::QAR1(C)
- Refutation
- S(b);P_SPINS(b)
- Try
- B(D);CHECK
- Vars
- K(a);N_GUARD,S_CUTS(b),S_CUTS(c),S_FLIGHT::QAR1(C)
- S(c);P_SPINS(c)::QAR1(C)
- Refutation
- S(b);P_SPINS(b)
- Try
- B(D);CHECK
- Vars
- K(a);N_GUARD,S_CUTS(b),S_CUTS(c),S_FLIGHT::QAR1(C)
- K(a);N_GUARD,S_FLIGHT::B(D)
- S(c);P_SPINS(c)::QAR1(C)
- Refutation
- S(b);P_SPINS(b)
- Try
- B(D);CHECK
- Refutation
- K(a);S_FLIGHT,XB(D)
- Try
- B(D);CHECK
- Vars
- K(a);N_GUARD,S_FLIGHT,XB(D)::QAR1(C)
- Refutation
- K(a);S_FLIGHT
- Try
- B(D);CHECK,XS(b)
- Vars
- S(c);N_GUARD,P_SPINS(c)::R1(B),XS(c)
- Refutation
- K(a);S_FLIGHT
- Try
- Q(C);
- Threat
- R(B)+B(D),DCHECK
- Vars
- K(a);S_FLIGHT::B(D)
- S(c);N_GUARD::QAR1(C)
- Refutation
- S(b);
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- K(a);S_FLIGHT::B(D)
- S(b);::PXS(c)=Q
- S(c);::R(B)+B(D),DCHECK
- Refutation
- S(c);
- Try
- P(G);CHECK,XS(c)
- Refutation
- K(a);S_FLIGHT,XS(G)
- Try
- P(G);CHECK,XS(c)
- Refutation
- K(a);S_FLIGHT,XB(G)
- Try
- Actual
- R(B);
- Threat
- PXS(c)=Q
- Vars
- K(a);N_GUARD,S_FLIGHT::B(D)
- Q(d);P_PINS(E),XS(H)::PXS(c)=Q
- S(c);N_GUARD,XR(F)::QAR1(C)
- Q(d);::PXS(c)=Q
- S(b);::PXS(c)=Q
- S(c);N_GUARD::QAR1(C),XS(c)
- Q(d);P_PINS(E)::PXS(c)=Q
- Q(d);SBLOCK::QAB(C)
- S(b);SBLOCK::S(H)
- S(c);N_GUARD::QAR1(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).