MESON Chess Problem Database

Problem Display
PID: 80768 (8/1p6/3p2p1/P1k1p1Q1/P4p2/2K2B2/6p1/8 w - - 0 1)

Welburn, T

The Field, 1949

(First published on Sat Feb 19 1949)

8/1p6/3p2p1/P1k1p1Q1/P4p2/2K2B2/6p1/8

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...g1Q
      • 2.Qxg1#
    • 1...g1S
      • 2.Qxg1#
    • 1...g1B
      • 2.Qxg1#
    • 1...g1R
      • 2.Qxg1#
  • Tries
    • 1.Qd8?
      • threat
        • 2.Qb6#
        • 2.Qc7#
        • 2.Qc8#
      • 1...d5
        • 2.Qb6#
        • 2.Qc7#
        • 2.Qxd5#
      • 1...b6
        • 2.Qxb6#
        • 2.Qc7#
        • 2.Qc8#
      • 1...e4!
    • 1.Qxe5+?
      • 1...d5
        • 2.Qc7#
        • 2.Qxd5#
      • 1...dxe5!
  • Keys
    • 1.Bxb7!
      • 1...d5
        • 2.Qe7#
      • 1...g1Q
        • 2.Qxg1#
      • 1...g1S
        • 2.Qxg1#
      • 1...g1B
        • 2.Qxg1#
      • 1...g1R
        • 2.Qxg1#
      • 1...f3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE::QAB(E),XQ(a)
    • P(a);OGATE::QAB(E),XS(a)
    • P(a);OGATE::QAB(E),XB(a)
    • P(a);OGATE::QAB(E),XR(a)
  • Tries
    • Try
      • Q(E);N_PINP(d)
      • Threat
        • DUALS(3)
      • Refutation
        • P(d);
    • Try
      • Q(E);CHECK,XP(d)
      • Refutation
        • P(e);XQ(E)
  • Actual
    • B(B);XP(g)
    • Vars
      • P(e);N_SPINP(d),OGATEB::QAB(E)
      • P(a);OGATE::QAB(E),XQ(a)
      • P(a);OGATE::QAB(E),XS(a)
      • P(a);OGATE::QAB(E),XB(a)
      • P(a);OGATE::QAB(E),XR(a)
      • P(b);OGATE::QAB(E)
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