MESON Chess Problem Database

Problem Display
PID: 225346 (2B5/2k1N3/2P2K2/8/8/2R5/8/3Q4 w - - 0 1)

Jancek, Jan

Praca, 1953

2B5/2k1N3/2P2K2/8/8/2R5/8/3Q4

#2

6 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Ra3?
      • 1...Kb8
        • 2.Qd6#
      • 1...Kb6!
    • 1.Qb3?
      • 1...Kd6
        • 2.Qb8#
      • 1...Kd8!
    • 1.Qb1?
      • 1...Kd6
        • 2.Qb8#
      • 1...Kd8!
    • 1.Qd7+?
      • 1...Kb8
        • 2.Qb7#
      • 1...Kb6!
  • Keys
    • 1.Qa4!
      • 1...Kb6
        • 2.Sd5#
      • 1...Kd6
        • 2.Qf4#
      • 1...Kb8
        • 2.c7#
      • 1...Kd8
        • 2.c7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::S(E)
      • K(a);S_FLIGHT::QAB(A)
      • K(a);OGATE,S_FLIGHT::P(C)
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