MESON Chess Problem Database

Problem Display
PID: 108261 (8/8/1K1P2p1/N1B5/k3b2R/P2Nr3/1Pr5/n1RBn1bQ w - - 0 1)

du Gres, Jacques

Canadian Chess Chat, 1980

8/8/1K1P2p1/N1B5/k3b2R/P2Nr3/1Pr5/n1RBn1bQ

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bxc2+?
      • 1...Saxc2
        • 2.b3#
      • 1...Sb3
        • 2.Bxb3#
      • 1...Sexc2!
    • 1.Rxc2?
      • threat
        • 2.Rc4#
      • 1...Saxc2
        • 2.b3#
      • 1...Sexc2!
  • Keys
    • 1.Bg4!
      • threat
        • 2.Bd7#
      • 1...Rxb2+
        • 2.Sxb2#
      • 1...Rxc5
        • 2.Sxc5#
      • 1...Rc4
        • 2.Rxc4#
      • 1...Bf5
        • 2.Qc6#
      • 1...Bc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK,XR(d)
      • Vars
        • S(a);N_GUARD,XB(B)::P(D)
        • S(a);N_GUARD,P_SPINS(a)::B(B),XS(a)
      • Refutation
        • S(b);XB(B)
    • Try
      • R(A);XR(d)
      • Threat
        • B(B)+R(A),DCHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a),XR(A)::P(D)
      • Refutation
        • S(b);P_SPINS(b),XR(A)
  • Actual
    • B(B);N_PINB(g),N_PINR(d)
    • Threat
      • B(B)
    • Vars
      • R(d);CHECK,XP(D)::S(F),XR(d)
      • R(d);XB(I)::S(F),XR(d)
      • R(d);OGATE::R(A),XR(d)
      • B(g);OGATE::QAB(C)
      • B(g);OGATE::QAB(C),XB(g)
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