MESON Chess Problem Database

Problem Display
PID: 57567 (2N4B/pB2p2K/4P2p/2k3rQ/P4R2/Pp1R2n1/3pp3/nbr1N3 w - - 0 1)

Asbury-Smith, Peter Clement

Chess Life, 1957

2N4B/pB2p2K/4P2p/2k3rQ/P4R2/Pp1R2n1/3pp3/nbr1N3

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxd5#
    • 1...Re5
      • 2.Qxe5#
    • 1...Bxd3+
      • 2.Sxd3#
    • 1...Sc2
      • 2.Rc3#
    • 1...Sf5
      • 2.Rd5#
  • Tries
    • 1.Qe8?
      • threat
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qxe7#
      • 1...Bxd3+
        • 2.Sxd3#
      • 1...Se4
        • 2.Qb5#
        • 2.Qc6#
      • 1...Rd5
        • 2.Qb5#
        • 2.Qc6#
      • 1...Sf5
        • 2.Rd5#
        • 2.Qb5#
        • 2.Qc6#
      • 1...a6
        • 2.Qc6#
        • 2.Qxe7#
      • 1...Rg7+!
    • 1.Qxg5+?
      • 1...Sf5
        • 2.Rd5#
        • 2.Qxf5#
      • 1...hxg5!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Bd4#
      • 1...Bxd3+
        • 2.Sxd3#
      • 1...Rc4
        • 2.Rb5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sc2
        • 2.Rc3#
      • 1...Sf5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(i);OGATE::QAR1(F),XR(i)
    • R(i);OGATE::QAR2(F),XR(i)
    • B(b);CHECK,XR(C)::S(A),XB(b)
    • S(a);N_PINR(C)::R(C)
    • S(g);N_PINR(C),N_SPINR(i)::R1(C)
  • Tries
    • Try
      • Q(F);N_PINR(i)
      • Threat
        • DUALS(3)
      • Vars
        • B(b);CHECK,XR(C)::S(A),XB(b)
      • Refutation
        • R(i);CHECK
    • Try
      • Q(F);CHECK,XR(i)
      • Refutation
        • P(j);XQ(F)
  • Actual
    • R(E);
    • Threat
      • B(K)
    • Vars
      • B(b);CHECK,XR(C)::S(A),XB(b)
      • R(c);SBLOCK::R1(E)
      • R(i);OGATE::QAR2(F),XR(i)
      • S(a);N_PINR(C)::R(C)
      • S(g);N_PINR(C),N_SPINR(i)::R1(C)
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