MESON Chess Problem Database

Problem Display
PID: 114 (1N6/1k2K3/1P6/8/2N5/1Q6/8/8 w - - 0 1)

Kjellstrom, J

Svenska Dagbladet, 1930

1N6/1k2K3/1P6/8/2N5/1Q6/8/8

#2

5 + 1

5454 Near Snap 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Sa5+?
      • 1...Kxb8
        • 2.Qg8#
      • 1...Kc8
        • 2.Qg8#
      • 1...Ka8!
    • 1.Sd6+?
      • 1...Kxb8
        • 2.Qg8#
      • 1...Ka8!
    • 1.Sa6?
      • 1...Kc6
        • 2.Sa5#
      • 1...Ka8
        • 2.Qf3#
      • 1...Kc8
        • 2.Sd6#
        • 2.b7#
      • 1...Kxa6!
    • 1.Qg3?
      • 1...Kc8
        • 2.Qc7#
      • 1...Ka8!
  • Keys
    • 1.Sd7!
      • 1...Ka6
        • 2.Sc5#
      • 1...Kc6
        • 2.Sa5#
      • 1...Ka8
        • 2.Qf3#
      • 1...Kc8
        • 2.Sd6#

This anticipates 110504(1965)

FEATURES

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