MESON Chess Problem Database

Problem Display
PID: 234723 (8/8/8/8/7B/2K3Q1/4Np2/3k3B w - - 0 1)

Lincoln, Robert A

Kudesnik, 2013

8/8/8/8/7B/2K3Q1/4Np2/3k3B

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f1Q
      • 2.Qd3#
    • 1...f1S
      • 2.Qe1#
    • 1...f1B
      • 2.Qe1#
      • 2.Qd3#
    • 1...f1R
      • 2.Qd3#
  • Tries
    • 1.Qf3?
      • 1...f1Q
        • 2.Qxf1#
        • 2.Qd3#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
        • 2.Qd3#
      • 1...f1R
        • 2.Qxf1#
        • 2.Qd3#
      • 1...Ke1!
  • Keys
    • 1.Bf3!
      • 1...Ke1
        • 2.Qg1#
      • 1...f1Q
        • 2.Qd6#
      • 1...f1S
        • 2.Qe1#
      • 1...f1B
        • 2.Qe1#
        • 2.Qd6#
      • 1...f1R
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);::QAR2(D)
    • P(b);OGATE::QAR1(D)
  • Tries
    • Try
      • Q(D);
      • Vars
        • P(b);OGATE::QAR2(D),XS(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
  • Actual
    • B(A);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(D)
      • P(b);::QAR(D)
      • P(b);OGATE::QAR1(D)
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