MESON Chess Problem Database

Problem Display
PID: 150117 (8/5p2/3Q1P2/1p1p4/1P2k1P1/2K5/5PP1/8 w - - 0 1)

Dawson, Thomas Rayner

Pittsburgh Sun, 1924

(First published on Sat Mar 1 1924)

8/5p2/3Q1P2/1p1p4/1P2k1P1/2K5/5PP1/8

#2

7 + 4

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...d4+
      • 2.Qxd4#
  • Tries
    • 1.Kc2?
      • 1...Kd4
        • 2.Qf4#
      • 1...d4!
    • 1.Qxd5+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxd5!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qf5#
      • 1...fxe6!
    • 1.Qd7?
      • threat
        • 2.Qf5#
      • 1...d4+
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Ke5!
    • 1.f4?
      • threat
        • 2.Qe5#
      • 1...d4+
        • 2.Qxd4#
      • 1...Ke3!
  • Keys
    • 1.Kd2!
      • 1...Kd4
        • 2.Qf4#
      • 1...d4
        • 2.f3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);CHECK,OGATE::QAR1(F),XP(c)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::QAR2(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • P(d);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • P(c);CHECK,OGATE::QAR1(F),XP(c)
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(A);
      • Threat
        • QAR1(F)
      • Vars
        • P(c);CHECK,OGATE::QAR1(F),XP(c)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(C);S_FLIGHT
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(F)
      • P(c);::P(A)
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