MESON Chess Problem Database

Problem Display
PID: 260579 (6Q1/8/4N2N/3k4/K7/8/4P2B/8 w - - 0 1)

Fokin, Mikhail

64 Shakhmatnoe obozrenie, 2022

6Q1/8/4N2N/3k4/K7/8/4P2B/8

#2

6 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Qh7?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Kc6!
    • 1.Qg2+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Kxe6!
    • 1.Qg3?
      • 1...Kc4
        • 2.Qb3#
        • 2.Qd3#
      • 1...Ke4
        • 2.Qe5#
        • 2.Qd3#
        • 2.Qf3#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Kc6!
    • 1.Qg5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxe6!
    • 1.Qg6?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qg7?
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Kc6!
    • 1.Qa8+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Kxe6!
    • 1.Qd8+?
      • 1...Kc4
        • 2.Qd3#
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd3#
        • 2.Qd4#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Kc6!
    • 1.Qe8?
      • 1...Kc4
        • 2.Qc6#
      • 1...Ke4!
    • 1.Qf8?
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxe6
        • 2.Qd6#
        • 2.Qf7#
      • 1...Kc6!
  • Keys
    • 1.Qb8!
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxe6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(F)
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(D)::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
        • K(a);N_GUARD,S_FLIGHT::QAR1(F)
        • K(a);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(F)
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(D)::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(F)
        • K(a);N_GUARD,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(F)
      • K(a);N_GUARD,S_FLIGHT::QAR1(F)
      • K(a);N_GUARD,S_FLIGHT,XS(D)::QAR1(F)
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