MESON Chess Problem Database
Problem Display
PID: 80915 (8/b1p2P2/B5KR/3p2p1/1p1R1p2/1n2kP1p/1Q3pbN/4n3 w - - 0 1)
Boyer, Jean-Pierre
2nd Prize, Michel MT, 1981
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...Bxf3
- 2.Sf1#
- 1...Bxd4
- 2.Qe2#
- 1...Sd3
- 2.Rxd3#
- 1...Sxf3
- 2.Sg4#
- 1...Sa1
- 2.Qd2#
- 1...Sc1
- 2.Qd2#
- 1...Sd2
- 2.Qxd2#
- 1...Sxd4
- 2.Qc1#
- 1...Sa5
- 2.Qd2#
- 1...Sc5
- 2.Qd2#
- 1...Bxf3
- Tries
- 1.Kf5?
- threat
- 2.Re6#
- 1...Bxf3
- 2.Sf1#
- 1...Bxd4
- 2.Qe2#
- 1...Sxf3
- 2.Sg4#
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- 1...Sxd4+!
- threat
- 1.Kxg5?
- threat
- 2.Re6#
- 1...Bxf3
- 2.Sf1#
- 1...Bxd4
- 2.Qe2#
- 1...Sxd4
- 2.Qc1#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- 1...Sxf3+!
- threat
- 1.Kh5?
- threat
- 2.Re6#
- 1...Bxd4
- 2.Qe2#
- 1...Sxf3
- 2.Sg4#
- 1...Sxd4
- 2.Qc1#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- 1...Bxf3+!
- threat
- 1.Kg7?
- threat
- 2.Re6#
- 1...Bxf3
- 2.Sf1#
- 1...Sxf3
- 2.Sg4#
- 1...Sxd4
- 2.Qc1#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- 1...Bxd4+!
- threat
- 1.Sf1+?
- 1...Kxf3
- 2.Be2#
- 2.Qe2#
- 1...Bxf1!
- 1...Kxf3
- 1.Be2?
- threat
- 2.Sg4#
- 1...Bxf3
- 2.Sf1#
- 1...Sd2
- 2.Qxd2#
- 1...g4
- 2.Sxg4#
- 1...Sc2!
- threat
- 1.Rxd5?
- threat
- 2.Re5#
- 2.Qe5#
- 2.Qe2#
- 1...Sxf3
- 2.Qe2#
- 1...f1Q
- 2.Re5#
- 1...f1S
- 2.Re5#
- 2.Qe2#
- 1...f1B
- 2.Re5#
- 1...f1R
- 2.Re5#
- 2.Qe2#
- 1...Bf1
- 2.Re5#
- 2.Qe5#
- 1...Bd4
- 2.Qe2#
- 1...Sc2
- 2.Qe5#
- 2.Qxb3#
- 1...Sd3
- 2.Rxd3#
- 1...Sc1
- 2.Re5#
- 2.Qxc1#
- 2.Qe5#
- 2.Qd2#
- 1...Sd2
- 2.Qxd2#
- 1...Sd4
- 2.Re5#
- 2.Qc1#
- 1...Sc5
- 2.Qc1#
- 2.Qd4#
- 2.Qd2#
- 2.Qe2#
- 1...Bxf3!
- threat
- 1.Rxh3?
- threat
- 2.Sg4#
- 1...g4
- 2.Sxg4#
- 1...Bxh3!
- threat
- 1.Rh8?
- threat
- 2.Re8#
- 1...Bxf3
- 2.Sf1#
- 1...Bxd4
- 2.Qe2#
- 1...Sxf3
- 2.Sg4#
- 1...Sxd4
- 2.Qc1#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- 1...Bc5!
- threat
- 1.Qc3+?
- 1...Sd3
- 2.Qxd3#
- 1...bxc3!
- 1...Sd3
- 1.Qxb3+?
- 1...Sd3
- 2.Qxd3#
- 1...Kxd4!
- 1...Sd3
- 1.f8Q?
- threat
- 2.Qe7#
- 2.Qe8#
- 1...Bxf3
- 2.Sf1#
- 1...Bxd4
- 2.Qe2#
- 1...Sxf3
- 2.Sg4#
- 1...Sxd4
- 2.Qc1#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- 1...Bc5!
- threat
- 1.f8R?
- threat
- 2.Re8#
- 1...Bxf3
- 2.Sf1#
- 1...Bxd4
- 2.Qe2#
- 1...Sxf3
- 2.Sg4#
- 1...Sxd4
- 2.Qc1#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- 1...Bc5!
- threat
- 1.Kf5?
- Keys
- 1.Kh7!
- threat
- 2.Re6#
- 1...Bxf3
- 2.Sf1#
- 1...Bxd4
- 2.Qe2#
- 1...Sxf3
- 2.Sg4#
- 1...Sxd4
- 2.Qc1#
- 1...Sd3
- 2.Rxd3#
- 1...Sd2
- 2.Qxd2#
- 1...Sc5
- 2.Qd2#
- threat
- 1.Kh7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);SBLOCK,XP(C)::S(B)
- S(d);N_GUARD::QAB1(A)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- Tries
- Try
- K(F);S_FLIGHT
- Threat
- R(G)
- Vars
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- Refutation
- S(d);CHECK,XR(D)
- Try
- K(F);P-FLIGHT,XP(j)
- Threat
- R(G)
- Vars
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- Refutation
- S(a);CHECK,XP(C)
- Try
- K(F);S_FLIGHT
- Threat
- R(G)
- Vars
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(a);SBLOCK,XP(C)::S(B)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- Refutation
- B(c);CHECK,XP(C)
- Try
- K(F);P-FLIGHT
- Threat
- R(G)
- Vars
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- S(a);SBLOCK,XP(C)::S(B)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- Refutation
- B(k);CHECK,XR(D)
- Try
- S(B);CHECK
- Refutation
- B(c);XS(B)
- Try
- B(E);
- Threat
- S(B)
- Vars
- B(c);N_GUARD,XP(C)::S(B)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(j);::S(B),XP(j)
- Refutation
- S(a);
- Try
- R(D);XP(i)
- Threat
- DUALS(3)
- Vars
- S(a);XP(C)::QAR1(A)
- P(b);::R(D)
- B(k);::QAR1(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- Refutation
- B(c);XP(C)
- Try
- R(G);XP(f)
- Threat
- S(B)
- Vars
- P(j);::S(B),XP(j)
- Refutation
- B(c);XR(G)
- Try
- R(G);
- Threat
- R(G)
- Vars
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(a);SBLOCK,XP(C)::S(B)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- Refutation
- B(k);
- Try
- Q(A);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
- Refutation
- P(g);XQ(A)
- Try
- Q(A);CHECK,XS(d)
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
- Refutation
- K(e);S_FLIGHT,XR(D)
- Try
- P(H);
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(a);SBLOCK,XP(C)::S(B)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- Refutation
- B(k);
- Try
- P(H);
- Threat
- R(H)
- Vars
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(a);SBLOCK,XP(C)::S(B)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- Refutation
- B(k);
- Try
- Actual
- K(F);S_FLIGHT
- Threat
- R(G)
- Vars
- B(c);N_GUARD,SBLOCK,XP(C)::S(B)
- B(k);SBLOCK,XR(D)::QAR1(A)
- S(a);SBLOCK,XP(C)::S(B)
- S(d);N_GUARD,SBLOCK,XR(D)::QAB(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
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).