MESON Chess Problem Database
Problem Display
PID: 273220 (4K3/2P1B3/b1p1k3/R2Nbp2/3n1P2/1R4Q1/BP4q1/8 w - - 0 1)
Wiedenhoff, Claude
diagrammes, 1978
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Qg8#
- 1...Qh1
- 2.Qg8#
- 1...Qf3
- 2.Qg8#
- 1...Qh3
- 2.Qg8#
- 1...Qe4
- 2.Qg8#
- 1...Qxd5
- 2.Qg8#
- 1...Qxb2
- 2.Qg8#
- 1...Qc2
- 2.Qg8#
- 1...Qd2
- 2.Qg8#
- 1...Qe2
- 2.Qg8#
- 1...Qf2
- 2.Qg8#
- 1...Qh2
- 2.Qg8#
- 1...Bxf4
- 2.Sxf4#
- 1...Bxc7
- 2.Sxc7#
- 1...Bf1
- 2.c8Q#
- 2.c8B#
- 1...Be2
- 2.c8Q#
- 2.c8B#
- 1...Bd3
- 2.c8Q#
- 2.c8B#
- 1...Bc4
- 2.c8Q#
- 2.c8B#
- 1...Qf1
- Tries
- 1.Sb6?
- threat
- 2.Rxe5#
- 1...Bxf4
- 2.Re3#
- 1...Bxc7
- 2.Re3#
- 1...Qe4
- 2.Qg8#
- 1...Qd5
- 2.Qg8#
- 1...Qe2
- 2.Qg8#
- 1...Bd6
- 2.Re3#
- 1...Bf6
- 2.Re3#
- 1...Bg7
- 2.Re3#
- 1...Bh8
- 2.Re3#
- 1...Bb5
- 2.c8Q#
- 2.c8B#
- 1...Sf3
- 2.Rbb5#
- 1...Sb5
- 2.Rf3#
- 1...c5!
- threat
- 1.Re3?
- threat
- 2.Rxe5#
- 1...Qe4
- 2.Qg8#
- 1...Qe2
- 2.Qg6#
- 2.Qg8#
- 1...Sf3!
- threat
- 1.Rb7?
- threat
- 2.c8Q#
- 2.c8B#
- 1...Qxd5
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qxb2
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qxg3
- 2.c8Q#
- 2.c8B#
- 1...Bxf4
- 2.Sxf4#
- 1...Bxc7
- 2.Sxc7#
- 1...cxd5
- 2.c8Q#
- 2.c8B#
- 1...Sf3
- 2.c8Q#
- 2.c8B#
- 1...Qf1
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh1
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qf3
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh3
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qe4
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qg1
- 2.c8Q#
- 2.c8B#
- 1...Qc2
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qd2
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qe2
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qf2
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh2
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Bd6
- 2.c8Q#
- 2.c8B#
- 1...Bf6
- 2.c8Q#
- 2.c8B#
- 1...Bg7
- 2.c8Q#
- 2.c8B#
- 1...Bh8
- 2.c8Q#
- 2.c8B#
- 1...Bf1
- 2.c8Q#
- 2.c8B#
- 1...Be2
- 2.c8Q#
- 2.c8B#
- 1...Bd3
- 2.c8Q#
- 2.c8B#
- 1...Bc4
- 2.c8Q#
- 2.c8B#
- 1...Bb5
- 2.c8Q#
- 2.c8B#
- 1...Sc2
- 2.c8Q#
- 2.c8B#
- 1...Se2
- 2.c8Q#
- 2.c8B#
- 1...Sb3
- 2.c8Q#
- 2.c8B#
- 1...Sb5
- 2.c8Q#
- 2.c8B#
- 1...c5
- 2.c8Q#
- 2.c8B#
- 1...Bxb7!
- threat
- 1.Qxg2?
- threat
- 2.Qg8#
- 1...Bxf4
- 2.Sxf4#
- 1...Bg7!
- threat
- 1.Qg6+?
- 1...Bf6
- 2.Qf7#
- 2.Qxf6#
- 1...Qxg6+!
- 1...Bf6
- 1.Sb6?
- Keys
- 1.Sf6!
- threat
- 2.Rxe5#
- 1...Bxf4
- 2.Re3#
- 1...Bxf6
- 2.Re3#
- 1...Bxc7
- 2.Re3#
- 1...c5
- 2.Rb6#
- 1...Qe4
- 2.Qg8#
- 1...Qd5
- 2.Qg8#
- 1...Qe2
- 2.Qg8#
- 1...Bd6
- 2.Re3#
- 1...Bb5
- 2.c8Q#
- 2.c8B#
- 1...Sf3
- 2.Rbb5#
- 1...Sb5
- 2.Rf3#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 9
- Sets
- Q(a);N_GUARD::QAB(D)
- Q(a);N_GUARD,XS(G)::QAB(D)
- Q(a);N_GUARD,XP(B)::QAB(D)
- B(c);XP(E)::S(G),XB(c)
- B(c);XP(H)::S(G),XB(c)
- B(e);N_GUARD::P=Q
- Tries
- Try
- S(G);
- Threat
- R1(F),XB(c)
- Vars
- B(c);XP(E)::B(A)+R(C),DCHECK
- B(c);XP(H)::B(A)+R(C),DCHECK
- Q(a);N_GUARD::QAB(D)
- B(c);::B(A)+R(C),DCHECK
- B(e);N_GUARD::P=Q
- S(b);N_GUARD,S_CUTQ(a)::B(A)+R(C)
- S(b);N_GUARD,S_CUTB(e)::B(A)+R(C)
- Refutation
- P(f);
- Try
- R(C);P_PINB(c)
- Threat
- R1(C),XB(c)
- Vars
- Q(a);N_GUARD,N_SPINB(c)::QAB(D)
- Refutation
- S(b);
- Try
- R(C);
- Threat
- P=Q
- Vars
- Q(a);XQ(D)::P=Q
- B(c);XP(E)::B(A)+S(G),DCHECK,XB(c)
- B(c);XP(H)::B(A)+S(G),DCHECK,XB(c)
- P(f);P_SPINP(f),XS(G)::P=Q
- S(b);::P=Q
- Q(a);::P=Q
- B(c);::P=Q
- B(e);::P=Q
- P(f);::P=Q
- Refutation
- B(e);XR(C)
- Try
- Q(D);XQ(a)
- Threat
- QAB(D)
- Vars
- B(c);XP(E)::S(G),XB(c)
- Refutation
- B(c);
- Try
- Q(D);CHECK
- Refutation
- Q(a);CHECK,XQ(D)
- Try
- Actual
- S(G);
- Threat
- R1(F),XB(c)
- Vars
- B(c);XP(E)::B(A)+R(C),DCHECK
- B(c);XS(G)::B(A)+R(C),DCHECK
- B(c);XP(H)::B(A)+R(C),DCHECK
- P(f);::B(A)+R(C),DCHECK
- Q(a);N_GUARD::QAB(D)
- B(c);::B(A)+R(C),DCHECK
- B(e);N_GUARD::P=Q
- S(b);N_GUARD,S_CUTQ(a)::B(A)+R(C)
- S(b);N_GUARD,S_CUTB(e)::B(A)+R(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).