MESON Chess Problem Database

Problem Display
PID: 143139 (4k2r/1bKR4/8/8/4p3/8/8/1Q6 w k - 0 1)

Lincoln, Robert A

The Problemist Supplement, 2011

4k2r/1bKR4/8/8/4p3/8/8/1Q6

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qb8#
    • 1...Bc6
      • 2.Qb8#
    • 1...Ba8
      • 2.Qb8#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qf7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Rh7
        • 2.Qg8#
      • 1...Rf8
        • 2.Qe6#
      • 1...Bd5!
    • 1.Qxb7?
      • threat
        • 2.Qa8#
        • 2.Qc8#
        • 2.Qb8#
      • 1...Kf8
        • 2.Qa8#
        • 2.Qc8#
        • 2.Qb8#
      • 1...0-0!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qf7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Rh7
        • 2.Qg8#
      • 1...Rf8
        • 2.Qe6#
      • 1...Bd5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(b);OGATE::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
        • R(d);N_GUARD,P_PINR(C)::QAR2(A)
        • R(d);SBLOCK::QAR2(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);XB(b)
      • Threat
        • DUALS(3)
      • Refutation
        • K(c);0-0
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • R(d);N_GUARD,P_PINR(C)::QAR2(A)
      • R(d);SBLOCK::QAR2(A)
      • B(b);OGATE::QAR(A)
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