MESON Chess Problem Database

Problem Display
PID: 244823 (1Q6/3k4/P4K2/8/1B1n4/8/8/3B4 w - - 0 1)

Feoktistov, Aleksandr Fedorovich

64 Shakhmatnoe obozrenie, 1990

1Q6/3k4/P4K2/8/1B1n4/8/8/3B4

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qb7#
    • 1...Se2
      • 2.Ba4#
    • 1...Sf3
      • 2.Ba4#
    • 1...Sf5
      • 2.Ba4#
    • 1...Sc6
      • 2.Bg4#
    • 1...Se6
      • 2.Ba4#
  • Tries
    • 1.Be2?
      • 1...Kc6
        • 2.Qd6#
        • 2.Qb7#
      • 1...Sc2
        • 2.Bb5#
      • 1...Sb3
        • 2.Bb5#
      • 1...Sf3
        • 2.Bb5#
      • 1...Sb5
        • 2.Bxb5#
      • 1...Sf5
        • 2.Bb5#
      • 1...Sc6
        • 2.Bg4#
      • 1...Se6
        • 2.Bb5#
      • 1...Sxe2!
    • 1.Ba4+?
      • 1...Sb5
        • 2.Bxb5#
      • 1...Sc6!
    • 1.Qd6+?
      • 1...Ke8
        • 2.Bh5#
        • 2.Qe7#
      • 1...Kc8!
    • 1.Qc7+?
      • 1...Ke8
        • 2.Bh5#
        • 2.Qe7#
        • 2.Qc8#
      • 1...Kxc7!
    • 1.Qb7+?
      • 1...Ke8
        • 2.Qc8#
        • 2.Qe7#
      • 1...Kd8!
  • Keys
    • 1.Bh5!
      • threat
        • 2.Be8#
      • 1...Kc6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(b);S_FLIGHT::QAB1(E)
    • S(a);N_GUARD::B(A)
    • S(a);N_GUARD,SBLOCK::B(A)
  • Tries
    • Try
      • B(A);
      • Vars
        • S(a);N_GUARD::B(A)
        • S(a);N_GUARD::B(A),XS(a)
        • S(a);N_GUARD,SBLOCK::B(A)
      • Refutation
        • S(a);XB(A)
    • Try
      • B(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • K(b);S_FLIGHT::QAB1(E)
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