MESON Chess Problem Database

Problem Display
PID: 145177 (8/8/Q7/bp6/k7/8/K7/8 w - - 0 1)

McDowell, Michael

Ideal-Mate Review, 1986

8/8/Q7/bp6/k7/8/K7/8

#2

2 + 3

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qc6#
  • Tries
    • 1.Kb2?
      • 1...b4
        • 2.Qc6#
      • 1...Kb4!
    • 1.Qd6?
      • threat
        • 2.Qa3#
      • 1...b4
        • 2.Qc6#
        • 2.Qd7#
      • 1...Bb4!
    • 1.Qa8?
      • 1...b4
        • 2.Qc6#
        • 2.Qe8#
      • 1...Kb4!
  • Keys
    • 1.Qa7!
      • 1...Kb4
        • 2.Qd4#
      • 1...b4
        • 2.Qd7#

Anticipated by 175094(1902)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAB(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
    • Try
      • Q(B);N_PINB(b)
      • Threat
        • QAR1(B)
      • Refutation
        • B(b);
    • Try
      • Q(B);
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT::QAR2(B)
      • P(c);OGATEB,SBLOCK::QAB(B)
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