MESON Chess Problem Database

Problem Display
PID: 213041 (8/1N1k4/6R1/8/1Q4K1/8/8/8 w - - 0 1)

van Dijk, Nils Gustav Gerard

Land og Folk, 1970

8/1N1k4/6R1/8/1Q4K1/8/8/8

#2

4 + 1

5454 Near Snap 2020
15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe7+?
      • 1...Kc8
        • 2.Rg8#
      • 1...Kxe7!
  • Keys
    • 1.Rg7+!
      • 1...Kc6
        • 2.Qc5#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kc8
        • 2.Qf8#
      • 1...Ke8
        • 2.Qe7#

This anticipates 889(1995)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • R(C);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR(A)
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