MESON Chess Problem Database

Problem Display
PID: 47567 (K7/8/4Q3/4Np2/3P1P2/p1N1k3/8/4B3 w - - 0 1)

Lecomte, Roland

Themes-64, 1956

K7/8/4Q3/4Np2/3P1P2/p1N1k3/8/4B3

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qb6#
    • 1...Kxf4
      • 2.Qh6#
  • Tries
    • 1.Ka7?
      • 1...Kxd4
        • 2.Qb6#
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Kb7?
      • 1...Kxd4
        • 2.Qb6#
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Kb8?
      • 1...Kxd4
        • 2.Qb6#
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Qg8?
      • 1...Kxd4
        • 2.Qg1#
      • 1...Kxf4
        • 2.Bd2#
        • 2.Qg3#
      • 1...a2!
    • 1.Qa6?
      • 1...Kxd4
        • 2.Qb6#
        • 2.Qa7#
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Qb6?
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Qc6?
      • 1...Kxd4
        • 2.Bf2#
        • 2.Qb6#
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Qd6?
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Qf6?
      • 1...Kxd4
        • 2.Qb6#
      • 1...Kxf4
        • 2.Qh6#
      • 1...a2!
    • 1.Qg6?
      • 1...Kxd4
        • 2.Qg1#
        • 2.Qb6#
      • 1...Kxf4
        • 2.Bd2#
        • 2.Qg3#
        • 2.Qh6#
      • 1...a2!
    • 1.Qh6?
      • 1...Kxd4
        • 2.Qb6#
      • 1...a2!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qd2#
        • 2.Qf2#
      • 1...Kxd4
        • 2.Qf2#
      • 1...Kxf4
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XP(C)::QAB(F)
    • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(C)::QAB(F)
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(C)::QAB(F)
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(C)::QAB(F)
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Vars
        • K(b);S_FLIGHT,XP(C)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(C)::QAB(F)
        • K(b);OGATEB,P_SPINP(c),S_FLIGHT,XP(D)::QAB(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Refutation
        • P(a);
    • Try
      • Q(F);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(C)::QAB(F)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT,XP(C)::QAB(F)
      • K(b);S_FLIGHT,XP(D)::QAB(F)
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