MESON Chess Problem Database

Problem Display
PID: 164192 (7B/8/K7/3k3B/4N3/8/6Q1/2N5 w - - 0 1)

Berggren, G

Springaren, 1987

7B/8/K7/3k3B/4N3/8/6Q1/2N5

#2

6 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Qf1?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc6!
    • 1.Qf3?
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc6!
    • 1.Qh3?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kc6!
    • 1.Qb2?
      • 1...Kc4
        • 2.Bf7#
        • 2.Qd4#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6!
    • 1.Qf2?
      • 1...Kc4
        • 2.Qd4#
        • 2.Qc5#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc6!
    • 1.Qg3?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qe5#
        • 2.Qf3#
      • 1...Kc6
        • 2.Qd6#
      • 1...Ke6!
  • Keys
    • 1.Qg7!
      • 1...Kc4
        • 2.Qd4#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT,XS(C)::QAR1(B)
      • K(a);S_FLIGHT::QAB1(B)
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