MESON Chess Problem Database

Problem Display
PID: 150909 (3QKN1k/8/3P1N2/5q2/8/8/8/8 w - - 0 1)

Alexander, Frederick Forrest Lawrie

Source?, 1950

3QKN1k/8/3P1N2/5q2/8/8/8/8

#2

5 + 2

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Keys
    • 1.Kf7!
      • threat
        • 2.Se6#
        • 2.Sg6#
        • 2.Sd7#
        • 2.Sh7#
      • 1...Qe6+
        • 2.Sxe6#
      • 1...Qg6+
        • 2.Sxg6#
      • 1...Qd7+
        • 2.S8xd7#
      • 1...Qh7+
        • 2.S8xh7#
      • 1...Qd5+
        • 2.Se6#
      • 1...Qh5+
        • 2.Sg6#
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...Qe4
        • 2.Se6#
        • 2.Sg6#
      • 1...Qg4
        • 2.Sg6#
      • 1...Qc8
        • 2.Sg6#
      • 1...Qa5
        • 2.Sg6#
      • 1...Qb5
        • 2.Sg6#
        • 2.S8d7#
      • 1...Qe5
        • 2.Se6#
        • 2.Sg6#
      • 1...Qg5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Actual
    • K(D);P_SPINS(B),S_FLIGHT
    • Threat
      • DUALS(4)
    • Vars
      • Q(a);CHECK,N_PINS(B)::QAR(C)+S(E),XQ(a)
      • Q(a);CHECK,N_PINS(B)::QAR(C)+S(E),DCHECK,XQ(a)
      • Q(a);CHECK,N_PINS(B)::QAR(C)+S(E)
      • Q(a);CHECK,N_PINS(B)::QAR(C)+S(E),DCHECK
      • Q(a);CHECK,OGATE,XS(B)::QAB(C),XQ(a)
      • Q(a);N_PINS(B)::QAR(C)+S(E),DCHECK
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