MESON Chess Problem Database

Problem Display
PID: 214578 (rb1Q4/8/8/5bK1/5p2/8/k1B5/n2N4 w - - 0 1)

Seymour, Robert Hoe

Newark Sunday Call, 1877

rb1Q4/8/8/5bK1/5p2/8/k1B5/n2N4

#2

4 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qxa5#
    • 1...Be5
      • 2.Qxa8#
    • 1...Ba7
      • 2.Qa5#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qb2#
      • 1...Ka3
        • 2.Qb2#
      • 1...Be5!
    • 1.Qd4?
      • threat
        • 2.Qb2#
      • 1...Ka3
        • 2.Qb2#
      • 1...Be5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qb2#
      • 1...Ka3
        • 2.Qb2#
      • 1...Be5
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD::QAR(D),XR(e)
    • B(f);OGATE::QAR(D),XR(e)
    • B(f);S_CUTR(e)::QAR(D)
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(b);P-FLIGHT::QAB1(D)
      • Refutation
        • B(f);
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(b);P-FLIGHT::QAB1(D)
      • Refutation
        • B(f);
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • K(b);P-FLIGHT::QAB1(D)
      • B(f);OGATE::QAR(D),XR(e)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).