MESON Chess Problem Database

Problem Display
PID: 129750 (8/Q7/7K/5k2/2B3N1/8/7P/4N3 w - - 0 1)

Gold, S?

Frank. Schachblatt, 1895

8/Q7/7K/5k2/2B3N1/8/7P/4N3

#2

6 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Be6+?
      • 1...Ke4
        • 2.Qe3#
        • 2.Qa4#
      • 1...Kf4
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qa4#
      • 1...Kxe6!
    • 1.Qf2+?
      • 1...Kxg4
        • 2.Be6#
      • 1...Ke4!
    • 1.Qb8?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kxg4!
    • 1.Qb7?
      • threat
        • 2.Qf3#
      • 1...Kf4
        • 2.Qf3#
      • 1...Kxg4!
    • 1.Qc7?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kxg4!
    • 1.Qg7?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kf4!
    • 1.Qa8?
      • threat
        • 2.Qf3#
      • 1...Kf4
        • 2.Qf3#
      • 1...Kxg4!
  • Keys
    • 1.Qa4!
      • 1...Ke4
        • 2.Be6#
      • 1...Kf4
        • 2.Bd3#
        • 2.Be6#
      • 1...Kxg4
        • 2.Be6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XB(C)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(D)::B(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAR(F)+B(C)
      • K(a);S_FLIGHT,XS(D)::QAR(F)+B(C),DCHECK
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