MESON Chess Problem Database

Problem Display
PID: 37738 (1N6/8/2P1K3/PkP3PQ/Rn1p4/BP1R4/8/8 w - - 0 1)

Doukhan, Gerard

Wiedenhoff, Claude

1st Prize, Buletin Problemistic, 1982-1983

1N6/8/2P1K3/PkP3PQ/Rn1p4/BP1R4/8/8

#2

11 + 3

3748 FIDE Album (1983-1985) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.g6#
  • Tries
    • 1.Rxd4?
      • 1...Kxc5
        • 2.Rd5#
      • 1...Sxc6
        • 2.Qe2#
      • 1...Sa2
        • 2.Qe2#
      • 1...Sc2
        • 2.Qe2#
      • 1...Sd5
        • 2.Qe2#
      • 1...Sa6
        • 2.Qe2#
      • 1...Sd3!
    • 1.Rxb4+?
      • 1...Kxc5
        • 2.Rb6#
        • 2.Rb7#
        • 2.g6#
      • 1...Kxa5!
    • 1.Qf7?
      • 1...Kxc5
        • 2.Qf5#
      • 1...Sxd3
        • 2.Qb7#
      • 1...Sxc6
        • 2.Qb7#
      • 1...Sa2
        • 2.Qb7#
      • 1...Sc2
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Sd5!
    • 1.Qe8?
      • 1...Sxd3
        • 2.c7#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sa2
        • 2.c7#
      • 1...Sc2
        • 2.c7#
      • 1...Sd5
        • 2.c7#
      • 1...Sa6
        • 2.c7#
      • 1...Kxc5!
    • 1.Qh7?
      • 1...Kxc5
        • 2.Qf5#
      • 1...Sxd3
        • 2.Qxd3#
        • 2.Qb7#
      • 1...Sxc6
        • 2.Qb7#
      • 1...Sa2
        • 2.Qb7#
      • 1...Sc2
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Sd5!
    • 1.c7?
      • 1...Kxc5
        • 2.g6#
      • 1...Sxd3
        • 2.Qe8#
      • 1...Sa2
        • 2.Qe8#
      • 1...Sc2
        • 2.Qe8#
      • 1...Sd5
        • 2.Qe8#
      • 1...Sa6
        • 2.Qe8#
      • 1...Sc6!
  • Keys
    • 1.Qe2!
      • 1...Kxc5
        • 2.Qe5#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sxc6
        • 2.Rdxd4#
      • 1...Sa2
        • 2.Rdxd4#
      • 1...Sc2
        • 2.Rdxd4#
      • 1...Sd5
        • 2.Rdxd4#
      • 1...Sa6
        • 2.Rdxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINS(a),XP(F)::QAR(H)+P(G)
  • Tries
    • Try
      • R(C);XP(b)
      • Vars
        • K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(F)::R1(C)
        • S(a);N_GUARD,XP(I)::QAB(H)
        • S(a);N_GUARD::QAB(H)
      • Refutation
        • S(a);
    • Try
      • R(D);CHECK,XS(a)
      • Refutation
        • K(c);P-FLIGHT,XP(E)
    • Try
      • Q(H);
      • Vars
        • K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(F)::QAR(H)
        • S(a);XR(C)::QAR2(H)
        • S(a);XP(I)::QAR2(H)
        • S(a);::QAR2(H)
      • Refutation
        • S(a);
    • Try
      • Q(H);
      • Vars
        • S(a);N_GUARD,XR(C)::QAB(H)+P(I)
        • S(a);OGATE,P_SPINS(a),XP(I)::QAB1(H),XS(a)
        • S(a);N_GUARD::QAB(H)+P(I)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(a),XP(F)
    • Try
      • Q(H);
      • Vars
        • K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(F)::QAR(H)
        • S(a);XP(I)::QAR2(H)
        • S(a);::QAR2(H)
      • Refutation
        • S(a);
    • Try
      • P(I);
      • Vars
        • K(c);P-FLIGHT,P_SPINS(a),XP(F)::QAR(H)+P(G)
        • S(a);N_GUARD,XR(C)::QAB(H)
        • S(a);N_GUARD::QAB(H)
      • Refutation
        • S(a);
  • Actual
    • Q(H);
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(F)::QAR2(H)
      • S(a);OGATE,P_SPINS(a),XR(C)::QAB(H),XS(a)
      • S(a);N_GUARD,XP(I)::QAB(H)+R(C),XP(b)
      • S(a);N_GUARD::QAB(H)+R(C),XP(b)
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