MESON Chess Problem Database

Problem Display
PID: 214375 (2B4K/8/8/4k3/1PP5/8/3P4/7Q w - - 0 1)

Duchateau, M

La Strategie, 1880

2B4K/8/8/4k3/1PP5/8/3P4/7Q

#2

6 + 1

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd5#
  • Tries
    • 1.Qf3?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kd6!
    • 1.Qc6?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4!
    • 1.Qh6?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kd4!
  • Keys
    • 1.Qg1!
      • 1...Ke4
        • 2.Qe3#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qg7#

This anticipates 178318(1903)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).