MESON Chess Problem Database

Problem Display
PID: 154415 (4K3/8/N5p1/1QBk2p1/6P1/8/4P3/5B2 w - - 0 1)

McWilliam, Robert C

Bournemouth Evening Echo, 1987

(First published on Mon Sep 14 1987)

4K3/8/N5p1/1QBk2p1/6P1/8/4P3/5B2

#2

7 + 3

15393 McWilliam Scrapbook 2015
3713 Snap 2015

SOLUTION

  • SOUND
  • Tries
    • 1.Bd4+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kd6
        • 2.Qd7#
      • 1...Ke6
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxd6!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Bg2#
        • 2.Qd7#
      • 1...Ke6
        • 2.Qd6#
      • 1...Ke5!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd4#
      • 1...Ke5!
    • 1.Qb8?
      • 1...Ke4
        • 2.Bg2#
      • 1...Kc6
        • 2.Bg2#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kc4!
  • Keys
    • 1.Qb2!
      • 1...Kc4
        • 2.e4#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kc6
        • 2.Bg2#
      • 1...Ke6
        • 2.Sc7#

Anticipated by 31367(1884)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XB(E)
    • Try
      • B(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XB(E)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(D)
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::B(A)
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::B(A)+P(B)
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::B(A)
      • K(a);S_FLIGHT::S(F)
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