MESON Chess Problem Database

Problem Display
PID: 231091 (Q3N3/3k4/6B1/8/K7/8/8/8 w - - 0 1)

Fuss, Immo

The Sphinx, 1927

Q3N3/3k4/6B1/8/K7/8/8/8

#2

4 + 1

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd5+?
      • 1...Ke7
        • 2.Qd6#
      • 1...Kc8!
    • 1.Qc6+?
      • 1...Ke7
        • 2.Qd6#
      • 1...Kd8
        • 2.Qc7#
      • 1...Kxc6!
    • 1.Qb7+?
      • 1...Kd8
        • 2.Qc7#
      • 1...Ke6!
    • 1.Qa6?
      • 1...Ke7
        • 2.Qd6#
      • 1...Kd8!
    • 1.Qa7+?
      • 1...Kc6
        • 2.Be4#
      • 1...Kc8
        • 2.Qc7#
      • 1...Kd8
        • 2.Qc7#
      • 1...Ke6!
  • Keys
    • 1.Qb8!
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qd6#
      • 1...Ke7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::B(B)
        • K(a);S_FLIGHT::QAR1(C)
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
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