MESON Chess Problem Database

Problem Display
PID: 143280 (1Q6/1P5K/4k3/3NN3/8/3P4/8/8 w - - 0 1)

White, Alain Campbell

British Chess Magazine, 1893

1Q6/1P5K/4k3/3NN3/8/3P4/8/8

#2

6 + 1

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4?
      • 1...Kxd5
        • 2.Qd6#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qg8#
      • 1...Kf5!
    • 1.Qd6+?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kxd6!
    • 1.Qd8?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kxe5!
  • Keys
    • 1.Sf7!
      • 1...Kxd5
        • 2.Qd6#
      • 1...Kf5
        • 2.Qc8#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kxf7
        • 2.Qg8#

Anticipated by 165386(1891)

This anticipates 178121(1900), 194131(1917), 205572(1925), 39540(1933)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAR1(F)
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XQ(F)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT,XS(B)::QAR1(F)
      • K(a);S_FLIGHT::QAB(F)
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(F)
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