MESON Chess Problem Database

Problem Display
PID: 262371 (3Q3K/8/3N4/3Bk3/8/4N3/3P4/8 w - - 0 1)

Duquesnoy, Patrice

Europe Echecs, 1991

3Q3K/8/3N4/3Bk3/8/4N3/3P4/8

#2

6 + 1

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sdc4+?
      • 1...Kf4
        • 2.Qh4#
      • 1...Kd4!
    • 1.Se4?
      • threat
        • 2.Qf6#
      • 1...Kf4
        • 2.Qf6#
      • 1...Kd4!
    • 1.Sf7+?
      • 1...Kf4
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qc7#
        • 2.Qd6#
        • 2.Qb8#
      • 1...Kd4!
  • Keys
    • 1.Qc7!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Sf7#
      • 1...Kf6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • K(a);N_GUARD,S_FLIGHT::QAB(E)+S(D)
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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).