MESON Chess Problem Database

Problem Display
PID: 251828 (K7/1Q6/2N1p3/1p1kP3/1P2N3/8/4P3/8 w - - 0 1)

Anonymous

Manchester Weekly Times, 1889

(First published on Sat Jun 29 1889)

K7/1Q6/2N1p3/1p1kP3/1P2N3/8/4P3/8

#2

7 + 3

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qa6?
      • 1...Kc4
        • 2.Qa2#
      • 1...Kxe4!
    • 1.Qc8?
      • 1...Kc4
        • 2.Qxe6#
      • 1...Kxe4!
    • 1.Qa7?
      • 1...Kc4
        • 2.Qa2#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Kxe4!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Qxe6#
        • 2.Qd3#
      • 1...Kxe4!
    • 1.Qe7?
      • 1...Kc4
        • 2.Qxe6#
      • 1...Kxc6
        • 2.Qd6#
        • 2.Qb7#
      • 1...Kxe4!
    • 1.Qh7?
      • 1...Kxc6
        • 2.Qb7#
      • 1...Kc4!
  • Keys
    • 1.Qf7!
      • 1...Kc4
        • 2.Qxe6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Vars
        • K(b);N_GUARD,P_SPINP(a),S_FLIGHT::QAB(F)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(F);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(F);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(F)
        • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(F)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(F);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(F);P_PINP(c)
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB(F),XP(c)
      • K(b);N_SPINP(c),OGATEB,S_FLIGHT,XS(C)::QAB1(F)
      • K(b);N_SPINP(c),OGATEB,S_FLIGHT,XS(E)::QAB1(F)
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