MESON Chess Problem Database

Problem Display
PID: 160600 (7Q/8/5K2/1N6/8/pkB5/4B3/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2014

7Q/8/5K2/1N6/8/pkB5/4B3/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qh7?
      • 1...Ka2
        • 2.Bc4#
        • 2.Qc2#
      • 1...Ka4
        • 2.Qc2#
      • 1...a2!
    • 1.Qd8?
      • 1...Kc2
        • 2.Qd1#
      • 1...Ka4
        • 2.Qd1#
      • 1...a2
        • 2.Qd1#
      • 1...Ka2!
    • 1.Qg8+?
      • 1...Ka4
        • 2.Qc4#
      • 1...Kc2!
  • Keys
    • 1.Qh1!
      • 1...Ka2
        • 2.Bc4#
      • 1...Kc2
        • 2.Qd1#
      • 1...Ka4
        • 2.Qd1#
      • 1...a2
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
      • Refutation
        • P(a);
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
        • K(b);S_FLIGHT::QAB(E)
        • P(a);SBLOCK::QAB(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • K(b);S_FLIGHT::QAB1(E)
      • K(b);S_FLIGHT::QAB(E)
      • P(a);SBLOCK::QAB(E)
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