MESON Chess Problem Database

Problem Display
PID: 141821 (5K2/1N1p1p2/4k3/6Q1/2P5/8/8/8 w - - 0 1)

Lipton, Michael

Deutsche Schachzeitung, 1987

5K2/1N1p1p2/4k3/6Q1/2P5/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qe7#
    • 1...f6
      • 2.Qd5#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Qe7#
      • 1...f6
        • 2.Qd5#
      • 1...Kxd6!
    • 1.Qf4?
      • threat
        • 2.Sc5#
        • 2.Sd8#
      • 1...d5
        • 2.Sc5#
      • 1...f5
        • 2.Qd6#
      • 1...d6!
  • Keys
    • 1.Ke8!
      • 1...f5
        • 2.Qe7#
      • 1...d5
        • 2.cxd5#
      • 1...d6
        • 2.Sd8#
      • 1...f6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR1(B)
    • P(c);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::S(C)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);
  • Actual
    • K(D);P-FLIGHT
    • Vars
      • P(c);SBLOCK::QAR1(B)
      • P(b);OGATE::P(A),XP(b)
      • P(b);SBLOCK::S(C)
      • P(c);SBLOCK::QAB1(B)
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