MESON Chess Problem Database

Problem Display
PID: 226440 (3K4/8/3NN3/4k3/7P/8/3P3P/7Q w - - 0 1)

Mosley, GW

Leeds Mercury Weekly Supplement, 1882

(First published on Sat Oct 7 1882)

3K4/8/3NN3/4k3/7P/8/3P3P/7Q

#2

7 + 1

5454 Near Snap 2020
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sc7?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kxd6
        • 2.Qd5#
      • 1...Kf6!
    • 1.Qe4+?
      • 1...Kf6
        • 2.Qf5#
      • 1...Kxd6!
    • 1.Qd5+?
      • 1...Kf6
        • 2.Qf5#
      • 1...Kxd5!
  • Keys
    • 1.Sf4!
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf4
        • 2.Qe4#
      • 1...Kxd6
        • 2.Qd5#
      • 1...Kf6
        • 2.Qa1#

This anticipates 31369(1883), 76531(1933)

FEATURES

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