MESON Chess Problem Database
Problem Display
PID: 109860 (2K1R2B/5B2/1N6/b4p2/QpP5/2rk4/N2p4/3R4 w - - 0 1)
Boyer, Jean-Pierre
di Scala, Pascal
4th Prize, Main-Post, 1976
#2
9 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Sxc1#
- 1...Rc2
- 2.Qd7#
- 1...Ra3
- 2.Sc1#
- 1...Rb3
- 2.Qxb3#
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...f4
- 2.Bg6#
- 1...Rc1
- Tries
- 1.Kb7?
- 1...Rxc4
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...Rc1
- 2.Sxc1#
- 1...Rc2
- 2.Qd7#
- 1...Ra3
- 2.Sc1#
- 1...f4
- 2.Bg6#
- 1...b3!
- 1...Rxc4
- 1.Kb8?
- 1...Rxc4
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...Rc1
- 2.Sxc1#
- 1...Rc2
- 2.Qd7#
- 1...Ra3
- 2.Sc1#
- 1...f4
- 2.Bg6#
- 1...b3!
- 1...Rxc4
- 1.Bg8?
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...Rc2
- 2.Qd7#
- 1...Rc1
- 2.Sxc1#
- 1...Ra3
- 2.Sc1#
- 1...f4
- 2.Bh7#
- 1...b3!
- 1...Rxc4+
- 1.Bf6?
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...Rc2
- 2.Qd7#
- 1...Rc1
- 2.Sxc1#
- 1...Ra3
- 2.Sc1#
- 1...f4
- 2.Bg6#
- 1...b3!
- 1...Rxc4+
- 1.Bg7?
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...Rc2
- 2.Qd7#
- 1...Rc1
- 2.Sxc1#
- 1...Ra3
- 2.Sc1#
- 1...f4
- 2.Bg6#
- 1...b3!
- 1...Rxc4+
- 1.Rf1?
- threat
- 2.Rf3#
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...d1Q
- 2.Rxd1#
- 2.Qxd1#
- 1...d1S
- 2.Rxd1#
- 2.Qxd1#
- 1...d1B
- 2.Rxd1#
- 2.Qxd1#
- 1...d1R
- 2.Rxd1#
- 2.Qxd1#
- 1...b3!
- threat
- 1.Rg1?
- threat
- 2.Rg3#
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...d1Q
- 2.Rxd1#
- 2.Qxd1#
- 1...d1S
- 2.Rxd1#
- 2.Qxd1#
- 1...d1B
- 2.Rxd1#
- 2.Qxd1#
- 1...d1R
- 2.Rxd1#
- 2.Qxd1#
- 1...f4
- 2.Bg6#
- 1...b3!
- threat
- 1.Rh1?
- threat
- 2.Rh3#
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...d1Q
- 2.Rxd1#
- 2.Qxd1#
- 1...d1S
- 2.Rxd1#
- 2.Qxd1#
- 1...d1B
- 2.Rxd1#
- 2.Qxd1#
- 1...d1R
- 2.Rxd1#
- 2.Qxd1#
- 1...f4
- 2.Bg6#
- 1...b3!
- threat
- 1.Ree1?
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...Rc2
- 2.Qd7#
- 1...Rc1
- 2.Sxc1#
- 1...Ra3
- 2.Sc1#
- 1...f4
- 2.Bg6#
- 1...b3!
- 1...Rxc4+
- 1.Re7?
- 1...Rxc4+
- 2.Bxc4#
- 1...Bxb6
- 2.Sxb4#
- 1...Rb3
- 2.Qxb3#
- 1...Rc2
- 2.Qd7#
- 1...Rc1
- 2.Sxc1#
- 1...Ra3
- 2.Sc1#
- 1...f4
- 2.Bg6#
- 1...b3!
- 1...Rxc4+
- 1.Qb5?
- threat
- 2.Qxf5#
- 1...Rxc4+
- 2.Qxc4#
- 1...f4
- 2.Bg6#
- 2.Qf5#
- 1...Kc2!
- threat
- 1.Kb7?
- Keys
- 1.Qxb4!
- 1...Rxc4+
- 2.Qxc4#
- 1...Kc2
- 2.Qb1#
- 1...Bxb4
- 2.Sxb4#
- 1...Bxb6
- 2.Qxc3#
- 1...Rc2
- 2.Qd6#
- 1...Rc1
- 2.Rxd2#
- 1...Ra3
- 2.Rxd2#
- 2.Qb1#
- 1...Rb3
- 2.Rxd2#
- 1...f4
- 2.Bg6#
- 1...Rxc4+
- 1.Qxb4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(b);N_GUARD::S(B),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD,N_PINP(D)::S(B)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- P(f);OGATEB::B(F)
- Tries
- Try
- K(G);N_SPINP(D),S_FLIGHT
- Vars
- R(b);OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);OGATEB::QAR2(C),XR(b)
- R(b);N_GUARD::S(B),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD::S(B)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- K(G);N_SPINP(D),P-FLIGHT
- Vars
- R(b);OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);OGATEB::QAR2(C),XR(b)
- R(b);N_GUARD::S(B),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD::S(B)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- B(F);
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD::S(B),XR(b)
- R(b);N_GUARD,N_PINP(D)::S(B)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- B(I);
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD::S(B),XR(b)
- R(b);N_GUARD,N_PINP(D)::S(B)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- B(I);
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD::S(B),XR(b)
- R(b);N_GUARD,N_PINP(D)::S(B)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- R(A);N_PINP(a)
- Threat
- R(A)
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- Refutation
- P(d);
- Try
- R(A);N_PINP(a)
- Threat
- R(A)
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- R(A);N_PINP(a)
- Threat
- R(A)
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- R(H);
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD::S(B),XR(b)
- R(b);N_GUARD,N_PINP(D)::S(B)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- R(H);
- Vars
- R(b);CHECK,OGATE,XP(D)::B(F),XR(b)
- B(e);N_GUARD,XS(E)::S(B),XP(d)
- R(b);N_PINP(D),OGATEB::QAR2(C),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);N_GUARD::S(B),XR(b)
- R(b);N_GUARD,N_PINP(D)::S(B)
- P(f);OGATEB::B(F)
- Refutation
- P(d);
- Try
- Q(C);
- Threat
- QAB(C),XP(f)
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XP(D)::QAB1(C),XR(b)
- Refutation
- K(c);N_SPINP(a),S_FLIGHT
- Try
- Actual
- Q(C);XP(d)
- Vars
- R(b);CHECK,OGATE,XP(D)::QAB1(C),XR(b)
- K(c);N_SPINP(a),S_FLIGHT::QAB1(C)
- B(e);XQ(C)::S(B),XB(e)
- B(e);N_GUARD,XS(E)::QAR1(C),XR(b)
- R(b);SBLOCK::QAR(C)
- R(b);::R1(A),XP(a)
- R(b);N_PINP(D)::R1(A),XP(a)
- P(f);OGATEB::B(F)
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).