MESON Chess Problem Database

Problem Display
PID: 205519 (8/8/2K5/8/2kp4/R7/N1N5/8 w - - 0 1)

Larsen, Karl Adolf Koefoed

L'Echiquier Marseillais, 1925

8/8/2K5/8/2kp4/R7/N1N5/8

#2

4 + 2

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Rc3#
  • Tries
    • 1.Rb3?
      • 1...d3
        • 2.Rc3#
        • 2.Rb4#
      • 1...Kxb3!
  • Keys
    • 1.Sa1!
      • 1...d3
        • 2.Ra4#

This anticipates 171385(1995)

There are these versions: 23430

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::R1(C)
  • Tries
    • Try
      • R(C);
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • S(B);
    • Vars
      • P(b);SBLOCK::R(C)
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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).