MESON Chess Problem Database

Problem Display
PID: 193676 (8/1K6/3k4/8/8/P2P4/8/2R1Q3 w - - 0 1)

Shauer, CW

Pittsburgh Gazette-Times, 1915

8/1K6/3k4/8/8/P2P4/8/2R1Q3

#2

5 + 1

6490 yacpdb 2019
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rc4?
      • 1...Kd7
        • 2.Rd4#
      • 1...Kd5!
    • 1.Rc6+?
      • 1...Kd5
        • 2.Qe4#
      • 1...Kd7!
    • 1.d4?
      • 1...Kd5
        • 2.Qe5#
      • 1...Kd7!
  • Keys
    • 1.Rc5!
      • 1...Kxc5
        • 2.Qe5#
      • 1...Kd7
        • 2.Rd5#

This anticipates 234968(2008)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(a);S_FLIGHT,XR(A)::QAR2(B)
      • K(a);P-FLIGHT::R(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).