MESON Chess Problem Database

Problem Display
PID: 153990 (K1k5/2ppB3/1p6/8/1Q6/8/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 2014

K1k5/2ppB3/1p6/8/1Q6/8/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qg4#
    • 1...d6
      • 2.Qg4#
  • Tries
    • 1.Qd6?
      • 1...b5
        • 2.Qa6#
      • 1...c5
        • 2.Qb8#
      • 1...c6
        • 2.Qb8#
      • 1...cxd6!
    • 1.Qe4?
      • threat
        • 2.Qb7#
      • 1...d5
        • 2.Qf5#
        • 2.Qg4#
        • 2.Qe6#
      • 1...d6
        • 2.Qf5#
        • 2.Qg4#
        • 2.Qe6#
      • 1...c6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qf8#
      • 1...d5
        • 2.Qg4#
        • 2.Qf5#
      • 1...d6
        • 2.Qg4#
        • 2.Qf5#
      • 1...c5
        • 2.Qb8#
      • 1...c6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(a);OGATE::QAB(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • P(b);OGATE::QAR1(A)
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