MESON Chess Problem Database

Problem Display
PID: 11794 (Q7/8/2N5/3k2K1/8/B7/4P3/1R6 w - - 0 1)

Fischer, Franz

Die Schwalbe, 1972

Q7/8/2N5/3k2K1/8/B7/4P3/1R6

#2

6 + 1

5454 Near Snap 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Rd1+?
      • 1...Ke4
        • 2.Qe8#
      • 1...Ke6
        • 2.Qe8#
        • 2.Qg8#
      • 1...Kc4!
    • 1.Rb5+?
      • 1...Ke4
        • 2.Re5#
        • 2.Qe8#
      • 1...Ke6
        • 2.Qe8#
      • 1...Kc4!
    • 1.Qa5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kxc6!
    • 1.Qa6?
      • 1...Ke4
        • 2.Qd3#
      • 1...Ke6!
    • 1.Qa7?
      • 1...Kc4
        • 2.Qd4#
        • 2.Qc5#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6!
    • 1.Qb8?
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kxc6
        • 2.Qd6#
        • 2.Qb7#
      • 1...Ke6!
    • 1.Qc8?
      • 1...Ke4
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qd8+?
      • 1...Kc4
        • 2.Qd3#
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd3#
        • 2.Qd4#
      • 1...Kxc6
        • 2.Rb6#
        • 2.Qd6#
      • 1...Ke6!
    • 1.Qg8+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Kxc6!
  • Keys
    • 1.Qf8!
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qd6#
      • 1...Ke6
        • 2.Qf5#

Anticipated by 90021(1954)

FEATURES

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