MESON Chess Problem Database

Problem Display
PID: 205719 (4K2k/R6P/7R/6n1/8/8/8/8 w - - 0 1)

Berhausen, Fritz

Chess Amateur (The), 1925

4K2k/R6P/7R/6n1/8/8/8/8

#2

4 + 2

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Ra8?
      • 1...Kg7
        • 2.h8Q#
      • 1...Sxh7
        • 2.Kf7#
      • 1...Sf3
        • 2.Kf7#
      • 1...Sh3
        • 2.Kf7#
      • 1...Se4
        • 2.Kf7#
      • 1...Sf7
        • 2.Kxf7#
      • 1...Se6!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Rg8#
      • 1...Kxg7
        • 2.h8Q#
      • 1...Sxh7
        • 2.Rhxh7#

This anticipates 161683(1987)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
        • S(a);P_SPINS(a),XP(C)::R(B)+K(D)
        • S(a);::R(B)+K(D)
        • S(a);::R(B)+K(D),XS(a)
      • Refutation
        • S(a);
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • K(b);OGATE,S_FLIGHT,XR(B)::P=Q
      • S(a);OGATE,P_SPINS(a),XP(C)::R1(A),XS(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).