MESON Chess Problem Database

Problem Display
PID: 175220 (8/2n5/1N6/4p3/4k1P1/8/8/Q1B4K w - - 0 1)

Ramsay, AT

Boston Sunday Post, 1902

8/2n5/1N6/4p3/4k1P1/8/8/Q1B4K

#2

5 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Sd5!
    • 1.Qa4+?
      • 1...Kd3
        • 2.Qc4#
      • 1...Kf3!
  • Keys
    • 1.Qa2!
      • 1...Kd3
        • 2.Qc4#
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd4
        • 2.Qc4#
      • 1...Sb5
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa6
        • 2.Qd5#
      • 1...Se6
        • 2.Qd5#
      • 1...Sa8
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • S(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
      • S(c);N_GUARD::QAB1(A)
      • S(c);N_GUARD::QAB1(A),XS(c)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).