MESON Chess Problem Database

Problem Display
PID: 196940 (8/4K2k/7N/8/8/8/8/Q7 w - - 0 1)

Moller, Jorgen Thorvald

Skakbladet, 1919

8/4K2k/7N/8/8/8/8/Q7

#2

3 + 1

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sf5?
      • threat
        • 2.Qg7#
      • 1...Kg8
        • 2.Qg7#
      • 1...Kg6!
    • 1.Sf7?
      • 1...Kg8
        • 2.Qh8#
      • 1...Kg6!
    • 1.Qg1?
      • 1...Kh8
        • 2.Qg8#
      • 1...Kxh6!
  • Keys
    • 1.Kf6!
      • 1...Kxh6
        • 2.Qh1#
      • 1...Kh8
        • 2.Kg6#

Anticipated by 4549(1879), 9653(1907)

This anticipates 152713(1932), 81245(1966)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • K(C);S_FLIGHT
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(B)::QAR(A)
      • K(a);P-FLIGHT::QAB(A)+K(C)
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