MESON Chess Problem Database
Problem Display
PID: 108221 (3r1R2/BQ6/8/3Np2r/q1P1k2p/5b2/2P1N1R1/1B1K4 w - - 0 1)
Boyer, Jean-Pierre
Nice-Matin, 1976
#2
10 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxc2+
- 2.Bxc2#
- 1...Qb3
- 2.cxb3#
- 1...Qc6
- 2.c3#
- 1...Qd7
- 2.c3#
- 1...Qe8
- 2.c3#
- 1...Qa3
- 2.c3#
- 1...Qa5
- 2.c3#
- 1...Qa6
- 2.c3#
- 1...Qxa7
- 2.c3#
- 1...Rh7
- 2.Qxh7#
- 1...Rxd5+
- 2.Qxd5#
- 1...Ra8
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Rc8
- 2.Sc3#
- 1...Re8
- 2.Sc3#
- 1...Bxe2+
- 2.Rxe2#
- 1...Bxg2
- 2.Sc3#
- 1...Bg4
- 2.Rxg4#
- 1...Qxc2+
- Tries
- 1.Ke1?
- threat
- 2.Sec3#
- 2.Sdc3#
- 1...Qb4+
- 2.Sdc3#
- 1...Qa5+
- 2.Sdc3#
- 2.c3#
- 1...Qxc2
- 2.Bxc2#
- 1...Qxc4
- 2.Sdc3#
- 1...Qxa7
- 2.c3#
- 1...Rxd5
- 2.Sc3#
- 2.Qxd5#
- 1...Bxe2
- 2.Sc3#
- 2.Rxe2#
- 1...Qb3
- 2.Sdc3#
- 2.cxb3#
- 1...Qa1
- 2.Sdc3#
- 1...Qa3
- 2.Sdc3#
- 2.c3#
- 1...Rxf8!
- threat
- 1.Qb3?
- threat
- 2.Qd3#
- 2.Qe3#
- 2.Qxf3#
- 2.c3#
- 1...Bxe2+
- 2.Rxe2#
- 1...Qxb3
- 2.cxb3#
- 1...Qxc4
- 2.Qxc4#
- 2.Qxf3#
- 1...Qxa7
- 2.Qd3#
- 2.Qxf3#
- 2.c3#
- 1...Rxf8
- 2.Qd3#
- 2.c3#
- 1...Bxg2
- 2.Sc3#
- 2.Qd3#
- 2.Qe3#
- 2.c3#
- 1...Qa1
- 2.Qd3#
- 2.Qe3#
- 2.Qxf3#
- 1...Qa2
- 2.Qd3#
- 2.Qe3#
- 2.Qxf3#
- 1...Qa3
- 2.c3#
- 1...Rf5
- 2.Qd3#
- 2.Qe3#
- 2.c3#
- 1...Bg4
- 2.Rxg4#
- 2.Qd3#
- 2.Qe3#
- 2.c3#
- 1...Rxd5+!
- threat
- 1.Qd7?
- threat
- 2.Sc3#
- 2.Sf6#
- 1...Qxc2+
- 2.Bxc2#
- 1...Bxe2+
- 2.Rxe2#
- 1...Qxd7
- 2.c3#
- 1...Qxc4
- 2.Sf6#
- 1...Qxa7
- 2.c3#
- 1...Rxf8
- 2.Sc3#
- 1...Bxg2
- 2.Sec3#
- 2.Sdc3#
- 2.Qg4#
- 1...Qb3
- 2.Sf6#
- 2.cxb3#
- 1...Qc6
- 2.Sc3#
- 2.c3#
- 1...Qa1
- 2.Sf6#
- 1...Qa3
- 2.Sf6#
- 2.c3#
- 1...Qb4
- 2.Sf6#
- 1...Qa5
- 2.Sf6#
- 2.c3#
- 1...Qa6
- 2.Sc3#
- 2.c3#
- 1...Rf5
- 2.Sc3#
- 2.Qxf5#
- 1...Rh6
- 2.Sc3#
- 2.Qf5#
- 1...Bg4
- 2.Sc3#
- 2.Rxg4#
- 2.Qxg4#
- 1...Rxd7!
- threat
- 1.Qh7+?
- 1...Rf5
- 2.Qxf5#
- 1...Rxh7!
- 1...Rf5
- 1.Ke1?
- Keys
- 1.Qf7!
- threat
- 2.Qxf3#
- 1...Qxc2+
- 2.Bxc2#
- 1...Rxd5+
- 2.Qxd5#
- 1...Bxe2+
- 2.Rxe2#
- 1...Rxf8
- 2.Sc3#
- 1...Bxg2
- 2.Sc3#
- 1...Qb3
- 2.cxb3#
- 1...Qa3
- 2.c3#
- 1...Rf5
- 2.Qxf5#
- 1...Bg4
- 2.Rxg4#
- threat
- 1.Qf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::B(A),XQ(b)
- Q(b);::B(A)+P(C),XQ(b)
- Q(b);N_PINP(C)::B(A)+P(C)
- Q(b);N_PINP(C),XB(H)::B(A)+P(C)
- R(f);N_GUARD::QAB(I),XR(f)
- R(g);CHECK,OGATE,P_SPINR(g),XS(G)::QAB1(I),XR(g)
- R(g);::QAB(I)+S(G),DCHECK
- B(a);CHECK,OGATE,P_PINS(G),XS(D)::R(E),XB(a)
- B(a);N_PINS(D),P_PINS(G),XR(E)::S(D)
- B(a);N_GUARD::R(E),XB(a)
- Tries
- Try
- K(B);N_SPINP(C),N_SPINS(D),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK::QAB(I)+S(G),DCHECK
- Q(b);OGATE,P_SPINQ(b),XP(C)::B(A),XQ(b)
- Q(b);XP(F)::QAB(I)+S(G),DCHECK
- Q(b);N_GUARD,XB(H)::B(A)+P(C)
- Q(b);P_PINB(A)::QAB(I)+S(G),DCHECK
- Refutation
- R(g);XR(J)
- Try
- Q(I);N_SPINP(C)
- Threat
- DUALS(4)
- Vars
- B(a);CHECK,OGATE,P_PINS(G),XS(D)::R(E),XB(a)
- Q(b);OGATE,P_PINP(C),XQ(I)::B(A)+P(C),XQ(b)
- Q(b);::B(A)+P(C)
- Refutation
- R(g);CHECK,XS(G)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::B(A),XQ(b)
- B(a);CHECK,OGATE,XS(D)::R(E),XB(a)
- Q(b);N_PINP(C),XQ(I)::B(A)+P(C)
- Q(b);N_PINP(C),XP(F)::S(G)
- Q(b);N_PINP(C),XB(H)::B(A)+P(C)
- R(g);XR(J)::S(G)
- Q(b);N_PINP(C),P_PINB(A)::S(G)
- Q(b);N_PINP(C)::S(G)
- Refutation
- R(g);XQ(I)
- Try
- Q(I);CHECK
- Vars
- R(f);N_GUARD,P_SPINR(f)::QAB1(I),XR(f)
- Refutation
- R(f);XQ(I)
- Try
- Actual
- Q(I);
- Threat
- QAB1(I),XB(a)
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::B(A),XQ(b)
- R(g);CHECK,OGATE,XS(G)::QAB1(I),XR(g)
- B(a);CHECK,OGATE,P_PINS(G),XS(D)::R(E),XB(a)
- R(g);XR(J)::S(G)
- B(a);N_PINS(D),P_PINS(G),XR(E)::S(D)
- Q(b);::B(A)+P(C),XQ(b)
- Q(b);N_PINP(C)::B(A)+P(C)
- R(f);N_GUARD::QAB1(I),XR(f)
- B(a);N_GUARD::R(E),XB(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).