MESON Chess Problem Database

Problem Display
PID: 76828 (8/1K6/1p6/1kp5/pp6/1P6/1QPB4/8 w - - 0 1)

Davey, David Murray

The Tablet, 1946

(First published on Sat Nov 16 1946)

8/1K6/1p6/1kp5/pp6/1P6/1QPB4/8

#2

5 + 5

15239 Valois Notebooks 2016

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qe5#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qxa4#
      • 1...Ka5
        • 2.Qxa4#
      • 1...axb3
        • 2.Qa6#
      • 1...c4
        • 2.Qe5#
      • 1...a3!
    • 1.Qf6?
      • threat
        • 2.Qxb6#
      • 1...Ka5
        • 2.Qxb6#
      • 1...axb3!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qxa4#
      • 1...Ka5
        • 2.Qxa4#
      • 1...axb3
        • 2.Qa6#
      • 1...bxa3
        • 2.c4#
      • 1...c4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAR1(A),XP(a)
        • P(a);OGATE,XP(D)::QAB1(A)
        • P(d);OGATEB::QAR(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b)::QAB1(A),XP(e)
      • Refutation
        • P(a);XP(D)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(a)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(a)::QAR1(A),XP(a)
      • P(a);OGATE,XP(D)::QAB1(A)
      • P(b);N_GUARD,XQ(A)::P(B)
      • P(d);N_GUARD::QAR1(A),XP(b)
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