MESON Chess Problem Database

Problem Display
PID: 152967 (7k/7b/5KpN/6Q1/8/8/8/8 w - - 0 1)

Aleksandrov, Vladimir Aleksandrovich

Problemist Pribuzhya, 1993

7k/7b/5KpN/6Q1/8/8/8/8

#2

3 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qh4?
      • 1...Bg8
        • 2.Sf7#
      • 1...g5!
    • 1.Qd5?
      • 1...Bg8
        • 2.Qxg8#
      • 1...g5!
    • 1.Qxg6?
      • threat
        • 2.Sf7#
        • 2.Qg7#
      • 1...Bg8
        • 2.Qg7#
        • 2.Qxg8#
      • 1...Bxg6!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Kg5#
        • 2.Ke6#
        • 2.Ke7#
        • 2.Kf7#
      • 1...Bg8
        • 2.Kxg6#
      • 1...g5
        • 2.Kxg5#
        • 2.Ke6#
        • 2.Ke7#
        • 2.Kf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • B(b);SBLOCK::QAR(A)+S(C),DCHECK
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • B(b);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • P(a);
    • Try
      • Q(A);XP(a)
      • Threat
        • DUALS(2)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • DUALS(4)
    • Vars
      • B(b);::QAB(A)+K(B),XP(a)
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