MESON Chess Problem Database

Problem Display
PID: 107165 (4R3/8/4B3/4k3/N6K/8/5N2/5Q2 w - - 0 1)

Kardos, Tivadar

De Waarheid, 1965

4R3/8/4B3/4k3/N6K/8/5N2/5Q2

#2

6 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qg2?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
        • 2.Qg3#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kd6!
    • 1.Qd3?
      • 1...Kf4
        • 2.Qe4#
        • 2.Qg3#
      • 1...Kf6!
    • 1.Qc4?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6!
    • 1.Qb5+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kf4!
  • Keys
    • 1.Qc1!
      • 1...Kd4
        • 2.Qf4#
        • 2.Qc3#
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).