MESON Chess Problem Database
Problem Display
PID: 969 (q7/p1P1P2R/4Pp2/K2k1pRr/N2N2Qp/1P3p2/6BB/5r2 w - - 0 1)
Caillaud, Michel
Rotenberg, Jacques
The Problemist Supplement, 1995
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd8
- 2.cxd8Q#
- 2.cxd8R#
- 2.exd8Q#
- 2.exd8R#
- 1...Ra1
- 2.Bxf3#
- 1...Rb1
- 2.Bxf3#
- 1...Rc1
- 2.Bxf3#
- 1...Rd1
- 2.Bxf3#
- 1...Rg1
- 2.Bxf3#
- 1...Rh1
- 2.Bxf3#
- 1...Rh6
- 2.Rxf5#
- 1...Rxh7
- 2.Rxf5#
- 1...Qd8
- Tries
- 1.Sb6+?
- 1...Kc5
- 2.b4#
- 1...axb6+!
- 1...Kc5
- 1.Sc2?
- threat
- 2.Qc4#
- 1...Kxe6
- 2.Qxf5#
- 1...Qc6
- 2.Qxf5#
- 1...Kc6!
- threat
- 1.Sxf5?
- threat
- 2.Qc4#
- 1...Kc6
- 2.Qe4#
- 1...Kxe6
- 2.Sd4#
- 1...Qc6
- 2.Se3#
- 1...Rc1!
- threat
- 1.Qxf3+?
- 1...Kxd4
- 2.Qc3#
- 1...Rxf3!
- 1...Kxd4
- 1.c8Q?
- threat
- 2.Sc3#
- 2.Qd7#
- 2.Qc4#
- 2.Qc5#
- 2.Qxa8#
- 1...Rc1
- 2.Bxf3#
- 2.Qd7#
- 1...Qc6
- 2.Qxc6#
- 1...Qb7
- 2.Sc3#
- 2.Qxb7#
- 2.Qc4#
- 2.Qc5#
- 1...Qb8
- 2.Sc3#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 1...Ra1
- 2.Bxf3#
- 2.Qd7#
- 2.Qc4#
- 2.Qc5#
- 2.Qxa8#
- 1...Qxc8!
- threat
- 1.e8Q?
- threat
- 2.Rd7#
- 2.Qb5#
- 2.Qd7#
- 2.Qxa8#
- 1...Rxh7
- 2.Rxf5#
- 2.Qb5#
- 2.Qxa8#
- 1...Rc1
- 2.Bxf3#
- 2.Rd7#
- 2.Qd7#
- 1...Qc6
- 2.Qxc6#
- 1...Qb7
- 2.Rd7#
- 2.Qd7#
- 2.Qd8#
- 1...Qb8
- 2.Rd7#
- 2.Qc6#
- 2.Qd7#
- 1...Qc8
- 2.Qb5#
- 2.Qc6#
- 1...Qd8
- 2.Qb5#
- 2.Qc6#
- 2.Qxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...a6
- 2.Rd7#
- 2.Qd7#
- 2.Qxa8#
- 1...Qxe8!
- threat
- 1.e8S?
- threat
- 2.Sxf6#
- 2.Rd7#
- 1...Rxh7
- 2.Sxf6#
- 2.Rxf5#
- 1...fxg5
- 2.Sf6#
- 2.Rd7#
- 1...Qc6
- 2.Sxf6#
- 1...Qc8
- 2.Sxf6#
- 1...Qd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rh6
- 2.Rxf5#
- 2.Rd7#
- 1...Qxe8!
- threat
- 1.e8B?
- threat
- 2.Rd7#
- 1...Rxh7
- 2.Rxf5#
- 1...Qc6
- 2.Bxc6#
- 1...Qc8
- 2.Bc6#
- 1...Qd8
- 2.Bc6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Qxe8!
- threat
- 1.Sb6+?
- Keys
- 1.Sxf3!
- threat
- 2.Qc4#
- 1...Kc6
- 2.Sd4#
- 1...Kxe6
- 2.Qxf5#
- 1...Qc6
- 2.Qxf5#
- 1...Rc1
- 2.Sd4#
- threat
- 1.Sxf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(a);N_GUARD,P_PINS(D)::B(A),XP(b)
- R(a);N_GUARD::B(A),XP(b)
- R(f);N_GUARD::R(H),XP(e)
- R(f);N_GUARD,XR(L)::R(H),XP(e)
- Tries
- Try
- S(D);CHECK
- Vars
- K(d);N_SPINP(b),P-FLIGHT,P_SPINP(e)::P(C)
- Refutation
- P(h);CHECK,XS(D)
- Try
- S(E);
- Threat
- QAB1(F)
- Vars
- K(d);N_SPINP(b),P_SPINP(e),S_FLIGHT,XP(I)::QAB1(F),XP(e)
- Q(i);SBLOCK::QAR2(F),XP(e)
- Refutation
- K(d);S_FLIGHT
- Try
- S(E);XP(e)
- Threat
- QAB1(F)
- Vars
- K(d);S_FLIGHT::QAB(F)
- K(d);N_SPINP(b),S_FLIGHT,XP(I)::QAB(F)+S(E),DCHECK
- Q(i);SBLOCK::R(H)+S(E),DCHECK
- Refutation
- R(a);
- Try
- Q(F);CHECK,P_PINP(e),XP(b)
- Vars
- K(d);N_SPINP(e),P-FLIGHT,XS(E)::QAB1(F)
- Refutation
- R(a);P_SPINR(a),XQ(F)
- Try
- P(J);
- Threat
- DUALS(5)
- Vars
- Q(i);N_GUARD::QAB1(J),XQ(i)
- Refutation
- Q(i);XQ(J)
- Try
- P(K);
- Threat
- DUALS(4)
- Vars
- Q(i);N_GUARD::QAB1(K),XQ(i)
- Refutation
- Q(i);XQ(K)
- Try
- P(K);
- Threat
- DUALS(2)
- Vars
- Q(i);::S(K),XP(g)
- Q(i);OGATE,P_PINP(J)::PXQ(i)=Q
- Refutation
- Q(i);XS(K)
- Try
- P(K);
- Threat
- R(L)
- Vars
- R(f);N_GUARD,XR(L)::R(H),XP(e)
- Q(i);N_GUARD::B(K),XQ(i)
- Q(i);N_GUARD::B(K)
- Refutation
- Q(i);XB(K)
- Try
- Actual
- S(E);P_PINP(e),XP(b)
- Threat
- QAB1(F)
- Vars
- K(d);N_SPINP(e),S_FLIGHT::B(A)+S(E),DCHECK
- K(d);S_FLIGHT,XP(I)::QAB1(F),XP(e)
- Q(i);SBLOCK::QAR2(F),XP(e)
- R(a);N_GUARD::B(A)+S(E)
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