MESON Chess Problem Database

Problem Display
PID: 46746 (6k1/8/2p5/2K3N1/8/8/8/Q7 w - - 0 1)

Backe, Odd Erik

Leninska molodi, 1967

6k1/8/2p5/2K3N1/8/8/8/Q7

#2

3 + 2

4884 154 norske miniatyrproblemer 1974
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Kd6?
      • 1...Kf8
        • 2.Qh8#
      • 1...c5!
    • 1.Se6?
      • threat
        • 2.Qg7#
      • 1...Kh7
        • 2.Qg7#
      • 1...Kf7!
    • 1.Qf1?
      • 1...Kh8
        • 2.Qf8#
      • 1...Kg7!
  • Keys
    • 1.Qa7!
      • 1...Kf8
        • 2.Qf7#
      • 1...Kh8
        • 2.Qh7#

Anticipated by 182239(1906), 149372(1923)

This anticipates 85855(1968), 158191(1968), 249383(1971), 219432(1977), 245161(1997)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
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