MESON Chess Problem Database

Problem Display
PID: 80489 (bb2N3/1kP5/8/1K6/8/8/8/6Q1 w - - 0 1)

Nikitin, Vladimir V

StrateGems, 2008

bb2N3/1kP5/8/1K6/8/8/8/6Q1

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5?
      • threat
        • 2.Sd6#
        • 2.c8Q#
        • 2.c8B#
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Kc8!
    • 1.Qh1+?
      • 1...Ka7
        • 2.c8S#
      • 1...Kc8!
    • 1.Qg2+?
      • 1...Ka7
        • 2.c8S#
      • 1...Kc8!
  • Keys
    • 1.Qg7!
      • 1...Ka7
        • 2.c8S#
      • 1...Kc8
        • 2.Sd6#
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Ba7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(c);OGATE,XP(C)::QAR1(A),XB(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::P=S
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::P=S
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::P=S
      • K(a);S_FLIGHT::S(D)
      • B(c);OGATE,P_SPINB(c),XP(C)::QAR1(A),XB(c)
      • B(c);SBLOCK::S(D)
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