MESON Chess Problem Database

Problem Display
PID: 256938 (8/3kP3/P2P4/6NQ/K3P3/8/8/8 w - - 0 1)

Chernikh, Vassily

64 Shakhmatnoe obozrenie, 2022

8/3kP3/P2P4/6NQ/K3P3/8/8/8

#2

7 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kc8
      • 2.Qe8#
      • 2.e8Q#
  • Tries
    • 1.Kb5?
      • 1...Kc8
        • 2.Qe8#
        • 2.e8Q#
      • 1...Kxd6!
    • 1.Qg6?
      • threat
        • 2.e8Q#
      • 1...Kc8
        • 2.Qe8#
        • 2.e8Q#
      • 1...Kc6!
    • 1.e5?
      • threat
        • 2.e8Q#
      • 1...Kc8
        • 2.Qe8#
        • 2.e8Q#
      • 1...Kc6!
  • Keys
    • 1.Sf7!
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kc8
        • 2.e8Q#
      • 1...Ke8
        • 2.Se5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Refutation
        • K(a);P-FLIGHT,XP(F)
    • Try
      • Q(D);
      • Threat
        • P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(B);
      • Threat
        • P=Q
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(D)
      • K(a);N_GUARD,S_FLIGHT::P=Q
      • K(a);N_GUARD,S_FLIGHT::QAB(D)+S(C)
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