MESON Chess Problem Database

Problem Display
PID: 141228 (8/8/R3pp1B/pn1pk2N/7R/8/1K6/1B6 w - - 0 1)

Barrett, B

Baltimore Sunday News, 1888

8/8/R3pp1B/pn1pk2N/7R/8/1K6/1B6

#2

6 + 6

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Bf4#
    • 1...f5
      • 2.Bg7#
  • Tries
    • 1.Rb4?
      • threat
        • 2.Bf4#
      • 1...d4
        • 2.Rxb5#
      • 1...axb4!
    • 1.Rc4?
      • threat
        • 2.Bf4#
      • 1...d4
        • 2.Rc5#
      • 1...dxc4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sg6#
      • 1...Kd4
        • 2.Sd3#
      • 1...f5
        • 2.Bg7#
      • 1...d4
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::B(F)
    • P(f);OGATEB::B(F)
  • Tries
    • Try
      • R(C);
      • Threat
        • B(F)
      • Vars
        • P(c);OGATEB,SBLOCK::R(C),XS(b)
      • Refutation
        • P(a);XR(C)
    • Try
      • R(C);
      • Threat
        • B(F)
      • Vars
        • P(c);OGATEB,SBLOCK::R(C)
      • Refutation
        • P(c);XR(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(d);S_FLIGHT::R(C)+S(D)
      • P(f);OGATEB::B(F)
      • P(c);SBLOCK::R1(E),XP(e)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).