MESON Chess Problem Database

Problem Display
PID: 109644 (8/3k1P2/5n2/4Q1B1/K7/8/8/8 w - - 0 1)

Vishkov, Anatoly Ivanovich

Serp i molot, 1988

8/3k1P2/5n2/4Q1B1/K7/8/8/8

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se8
      • 2.fxe8Q#
  • Tries
    • 1.f8Q?
      • threat
        • 2.Qed6#
      • 1...Se8
        • 2.Qfxe8#
      • 1...Se4
        • 2.Qfe8#
      • 1...Kc6!
  • Keys
    • 1.Bf4!
      • 1...Kc6
        • 2.Qb5#
      • 1...Kc8
        • 2.Qc7#
      • 1...Kd8
        • 2.Qc7#
      • 1...Se4
        • 2.Qe8#
      • 1...Sg4
        • 2.Qe8#
      • 1...Sd5
        • 2.Qe8#
      • 1...Sh5
        • 2.Qe8#
      • 1...Sh7
        • 2.Qe8#
      • 1...Se8
        • 2.Qxe8#
        • 2.fxe8Q#
      • 1...Sg8
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE::PXS(a)=Q
  • Tries
    • Try
      • P(D);
      • Threat
        • QAR1(B)
      • Vars
        • S(a);N_GUARD::QAB1(D),XS(a)
        • S(a);N_GUARD::QAB1(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::QAR1(B)
      • K(b);P-FLIGHT::QAB1(B)
      • S(a);N_GUARD::QAB1(B)
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