MESON Chess Problem Database

Problem Display
PID: 234448 (8/8/2K5/p7/k7/8/p7/2N1B2Q w - - 0 1)

Lincoln, Robert A

ChessStar, 2013

8/8/2K5/p7/k7/8/p7/2N1B2Q

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qh8?
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Ka3!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxa2#
        • 2.Qb3#
        • 2.Qxa5#
      • 1...Ka3
        • 2.Qxa2#
        • 2.Qb3#
      • 1...a1Q
        • 2.Qb3#
        • 2.Qxa5#
      • 1...a1S
        • 2.Qa2#
        • 2.Qxa5#
      • 1...a1B
        • 2.Qa2#
        • 2.Qb3#
        • 2.Qxa5#
      • 1...a1R
        • 2.Qb3#
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Vars
        • P(a);OGATEB::QAR(C),XQ(a)
        • P(a);OGATEB::QAR(C),XS(a)
        • P(a);OGATEB::QAR(C),XB(a)
        • P(a);OGATEB::QAR(C),XR(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(3)
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