MESON Chess Problem Database

Problem Display
PID: 278155 (3K4/8/3N4/3Pk3/1P6/8/Q7/4B3 w - - 0 1)

Nikitin, V?

Phenix, 2008

3K4/8/3N4/3Pk3/1P6/8/Q7/4B3

#2

6 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Bg3#
  • Tries
    • 1.Bg3+?
      • 1...Kd4
        • 2.Qd2#
      • 1...Kf6!
    • 1.Qc4?
      • 1...Kxd6
        • 2.Bg3#
      • 1...Kf6!
    • 1.Qd2?
      • 1...Kxd6
        • 2.Bg3#
      • 1...Kf6!
  • Keys
    • 1.Qg2!
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Bg3#
      • 1...Kf6
        • 2.Bc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT,XS(E)::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(E)::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(E)::B(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR1(B)
      • K(a);N_GUARD,S_FLIGHT::QAB1(B)
      • K(a);N_GUARD,S_FLIGHT,XS(E)::B(A)
      • K(a);N_GUARD,S_FLIGHT::B(A)
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