MESON Chess Problem Database

Problem Display
PID: 146321 (Q5bk/4K3/8/4P1N1/2R5/8/8/8 w - - 0 1)

Stojnic, Dragan

The Problemist, 2012

Q5bk/4K3/8/4P1N1/2R5/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qh1+?
      • 1...Bh7
        • 2.Qxh7#
      • 1...Kg7!
    • 1.Qe4?
      • 1...Bxc4
        • 2.Qh7#
      • 1...Bd5
        • 2.Qh7#
      • 1...Be6
        • 2.Qh7#
      • 1...Bf7
        • 2.Qh7#
      • 1...Bh7
        • 2.Qxh7#
      • 1...Kg7!
  • Keys
    • 1.Kf8!
      • 1...Bxc4
        • 2.Qh1#
      • 1...Bd5
        • 2.Rh4#
      • 1...Be6
        • 2.Rh4#
      • 1...Bf7
        • 2.Kxf7#
      • 1...Bh7
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK,N_PINB(a)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(E),XB(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);N_PINB(a)
      • Vars
        • B(a);N_GUARD,XR(A)::QAR1(E)
        • B(a);N_GUARD::QAR1(E)
        • B(a);N_GUARD::QAR1(E),XB(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(D);N_PINB(a),S_FLIGHT
    • Vars
      • B(a);N_GUARD,XR(A)::QAB(E)
      • B(a);N_GUARD::R(A)
      • B(a);::QAR(E)+K(D),XB(a)
      • B(a);N_GUARD,SBLOCK::S(C)
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