MESON Chess Problem Database

Problem Display
PID: 121446 (b3N3/pk6/8/6Q1/K7/8/8/8 w - - 0 1)

Svozilek, Dalibor

Ruch, 1947

b3N3/pk6/8/6Q1/K7/8/8/8

#2

3 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Qb5#
    • 1...Kb6
      • 2.Qb5#
    • 1...Kc6
      • 2.Qb5#
  • Tries
    • 1.Qc5?
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb8
        • 2.Qc7#
      • 1...a6
        • 2.Qc7#
      • 1...a5!
    • 1.Qe5?
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Kc8
        • 2.Qc7#
      • 1...a6
        • 2.Qc7#
      • 1...a5!
  • Keys
    • 1.Qa5!
      • 1...Kc6
        • 2.Qb5#
      • 1...Kb8
        • 2.Qc7#
      • 1...Kc8
        • 2.Qc7#
      • 1...a6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • K(b);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • K(b);P-FLIGHT::QAB1(B)
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::QAR1(B)
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • K(b);P-FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::QAR1(B)
      • P(a);SBLOCK::QAR1(B)
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