MESON Chess Problem Database

Problem Display
PID: 255203 (K7/5B2/8/1k1NP3/N7/8/8/3Q4 w - - 0 1)

Kotov, Aleksandr

Magadan-60 JT (Kudesnik), 1999

(First published on Wed Mar 10 1999)

K7/5B2/8/1k1NP3/N7/8/8/3Q4

#2

6 + 1

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Be8#
  • Tries
    • 1.Qb3+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6
        • 2.Be8#
        • 2.Qb7#
      • 1...Ka5!
    • 1.Qd4?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6
        • 2.Be8#
      • 1...Ka5!
  • Keys
    • 1.Qd2!
      • 1...Kxa4
        • 2.Qb4#
      • 1...Kc4
        • 2.Sc7#
      • 1...Ka6
        • 2.Sc7#
      • 1...Kc6
        • 2.Be8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::B(E)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(A)
        • K(a);N_GUARD,S_FLIGHT::B(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);N_GUARD,S_FLIGHT,XS(B)::QAR1(A)
      • K(a);N_GUARD,S_FLIGHT::B(E)+S(C)
      • K(a);N_GUARD,S_FLIGHT::S(C)
      • K(a);N_GUARD,S_FLIGHT::B(E)
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