MESON Chess Problem Database

Problem Display
PID: 152721 (7k/6p1/3KB1P1/1pp2P2/n7/4p3/4p3/Q2n4 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1941

7k/6p1/3KB1P1/1pp2P2/n7/4p3/4p3/Q2n4

#2

5 + 8

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sdb2
      • 2.Qh1#
    • 1...Sdc3
      • 2.Qh1#
    • 1...Sab2
      • 2.Qa8#
    • 1...Sac3
      • 2.Qa8#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qh4#
        • 2.Qd8#
        • 2.Qf8#
      • 1...e1Q
        • 2.Qd8#
        • 2.Qf8#
      • 1...e1B
        • 2.Qd8#
        • 2.Qf8#
      • 1...gxf6!
    • 1.Qxa4?
      • threat
        • 2.Qh4#
        • 2.Qa8#
      • 1...e1Q
        • 2.Qa8#
      • 1...e1B
        • 2.Qa8#
      • 1...b4
        • 2.Qe8#
        • 2.Qa8#
      • 1...c4
        • 2.Qa8#
      • 1...bxa4!
  • Keys
    • 1.f6!
      • threat
        • 2.fxg7#
      • 1...gxf6
        • 2.Qxf6#
      • 1...Sdb2
        • 2.Qh1#
      • 1...Sdc3
        • 2.Qh1#
      • 1...Sab2
        • 2.Qa8#
      • 1...Sac3
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_SPINP(g),OGATE::QAB(A)
    • S(d);N_SPINP(g),OGATE::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • P(g);N_SPINP(g),XQ(A)
    • Try
      • Q(A);N_PINP(g),XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(A)
        • P(f);::QAB1(A)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • P(B);N_PINP(g)
    • Threat
      • P(B),XP(g)
    • Vars
      • P(g);OGATE,P_SPINP(g),XP(B)::QAB(A),XP(g)
      • S(a);OGATE::QAB(A)
      • S(d);OGATE::QAB1(A)
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