MESON Chess Problem Database

Problem Display
PID: 246617 (6B1/8/1p6/1PkN2Q1/8/2K5/8/8 w - - 0 1)

Chistyakov, Nikolay

Magadanskaya Pravda, 1990

6B1/8/1p6/1PkN2Q1/8/2K5/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qe7#
  • Tries
    • 1.Kd3?
      • 1...Kd6
        • 2.Qe7#
      • 1...Kxb5!
    • 1.Bf7?
      • 1...Kd6
        • 2.Qe7#
      • 1...Kxb5!
    • 1.Qe3+?
      • 1...Kd6
        • 2.Qe7#
      • 1...Kxb5!
    • 1.Qh4?
      • threat
        • 2.Qb4#
      • 1...Kd6
        • 2.Qe7#
      • 1...Kxb5!
    • 1.Qg7?
      • 1...Kd6
        • 2.Qc7#
        • 2.Qe7#
      • 1...Kxb5!
  • Keys
    • 1.Kb3!
      • 1...Kd4
        • 2.Qe3#
      • 1...Kxb5
        • 2.Sb4#
      • 1...Kd6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • B(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(D);
      • Refutation
        • K(a);P-FLIGHT,XP(B)
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);P-FLIGHT,XP(B)::QAR(D)+S(C)
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