MESON Chess Problem Database

Problem Display
PID: 23069 (8/3pp3/4kP2/7B/5K2/3Q4/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/3pp3/4kP2/7B/5K2/3Q4/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qg6#
    • 1...d6
      • 2.Qf5#
  • Tries
    • 1.Bf7+?
      • 1...Kxf6
        • 2.Qg6#
      • 1...Kxf7!
    • 1.Qc4+?
      • 1...Kxf6
        • 2.Qf7#
      • 1...d5
        • 2.Qc6#
      • 1...Kd6!
    • 1.Qe4+?
      • 1...Kxf6
        • 2.Qg6#
        • 2.Qe5#
      • 1...Kd6!
    • 1.Qd5+?
      • 1...Kxf6
        • 2.Qf7#
        • 2.Qe5#
      • 1...Kxd5!
    • 1.f7?
      • 1...Kf6
        • 2.Qg6#
      • 1...d6
        • 2.Qf5#
      • 1...d5!
  • Keys
    • 1.Be8!
      • 1...Kxf6
        • 2.Qg6#
      • 1...exf6
        • 2.Qxd7#
      • 1...d5
        • 2.Qa6#
      • 1...d6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(D)::QAR1(A)
    • P(b);SBLOCK::QAB1(A)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(D)::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT,XP(D)::QAR1(A)
        • P(b);N_GUARD,P_SPINP(b)::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • P(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
  • Actual
    • B(C);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(D)::QAR1(A)
      • P(c);SBLOCK,XP(D)::QAB1(A),XP(b)
      • P(b);N_GUARD,SBLOCK::QAR(A)
      • P(b);SBLOCK::QAB1(A)
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