MESON Chess Problem Database

Problem Display
PID: 1176 (1b1k4/1P3K2/2PB4/2R1P3/8/8/8/8 w - - 0 1)

Ling, John Francis

Problem Observer, 1996

1b1k4/1P3K2/2PB4/2R1P3/8/8/8/8

#2

6 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Bc7
      • 2.Be7#
  • Tries
    • 1.c7+?
      • 1...Kd7
        • 2.c8Q#
      • 1...Bxc7!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Bxb8#
      • 1...Bxd6
        • 2.b8Q#
      • 1...Ba7
        • 2.Bb8#
      • 1...Bc7
        • 2.Be7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(D)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • K(b);P-FLIGHT::P=Q
      • Refutation
        • B(a);XP(C)
  • Actual
    • R(A);
    • Threat
      • R(A)+B(D),XB(a)
    • Vars
      • B(a);OGATE,P_SPINB(a),XB(D)::P=Q
      • B(a);::R(A)+B(D)
      • B(a);SBLOCK::R(A)+B(D),DCHECK
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