MESON Chess Problem Database

Problem Display
PID: 170069 (k1K5/8/2N5/b2N4/8/5R2/8/3r4 w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

k1K5/8/2N5/b2N4/8/5R2/8/3r4

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Sb6#
      • 2.Sc7#
    • 1...Bd2
      • 2.Sb6#
      • 2.Sc7#
    • 1...Bc3
      • 2.Sb6#
      • 2.Sc7#
    • 1...Bb4
      • 2.Sb6#
      • 2.Sc7#
    • 1...Bb6
      • 2.Sxb6#
    • 1...Bc7
      • 2.Sxc7#
  • Tries
    • 1.Ra3?
      • threat
        • 2.Sb6#
        • 2.Sc7#
        • 2.Rxa5#
      • 1...Ra1
        • 2.Sb6#
        • 2.Sc7#
      • 1...Rb1
        • 2.Sc7#
        • 2.Rxa5#
      • 1...Rxd5!
    • 1.Rb3?
      • threat
        • 2.Rb8#
      • 1...Bb4
        • 2.Sb6#
        • 2.Sc7#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bc7
        • 2.Sxc7#
      • 1...Rb1!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Ra7#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::S(B),XB(b)
  • Tries
    • Try
      • R(A);P_PINB(b)
      • Threat
        • DUALS(3)
      • Refutation
        • R(a);XS(B)
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • B(b);N_GUARD::S(B),XB(b)
      • Refutation
        • R(a);
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • B(b);N_GUARD::S(B),XB(b)
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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).