MESON Chess Problem Database

Problem Display
PID: 250279 (2K1kb2/4ppp1/p5p1/8/8/4Q3/8/8 w - - 0 1)

Nikitin, V?

Uralski Problemist, 2008

2K1kb2/4ppp1/p5p1/8/8/4Q3/8/8

#2

2 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qd8#
        • 2.Qc6#
      • 1...e5
        • 2.Qd8#
      • 1...e6
        • 2.Qd8#
      • 1...f5
        • 2.Qxg6#
      • 1...f6!
    • 1.Qd3?
      • threat
        • 2.Qd7#
        • 2.Qd8#
      • 1...f6
        • 2.Qxg6#
      • 1...f5!
  • Keys
    • 1.Qg5!
      • 1...f5
        • 2.Qxg6#
      • 1...f6
        • 2.Qxg6#
      • 1...a5
        • 2.Qb5#
      • 1...e5
        • 2.Qd8#
      • 1...e6
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(A)
        • P(d);OGATEB::QAB(A),XP(b)
      • Refutation
        • P(d);
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATEB::QAB(A),XP(b)
      • Refutation
        • P(d);
  • Actual
    • Q(A);N_PINP(c)
    • Vars
      • P(d);OGATEB::QAB(A),XP(b)
      • P(a);N_GUARD::QAB(A)
      • P(c);OGATE::QAR1(A)
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