MESON Chess Problem Database

Problem Display
PID: 183363 (2K1k3/3Nr3/4P3/8/8/1Q6/1B6/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2016

2K1k3/3Nr3/4P3/8/8/1Q6/1B6/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6
      • 2.Qxe6#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qf8#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Rxd7!
    • 1.Qb6?
      • threat
        • 2.Qd8#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Rxd7!
  • Keys
    • 1.Ba3!
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Rxd7
        • 2.exd7#
      • 1...Rf7
        • 2.exf7#
      • 1...Rg7
        • 2.Sf6#
      • 1...Rh7
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XP(C)::QAR2(B),XR(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(a);N_GUARD::QAB1(B),XR(a)
      • Refutation
        • R(a);XS(D)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(a);OGATE,XP(C)::QAR2(B),XR(a)
      • Refutation
        • R(a);XS(D)
  • Actual
    • B(A);
    • Vars
      • R(a);OGATE,XP(C)::QAR2(B),XR(a)
      • R(a);OGATE,XS(D)::P(C),XR(a)
      • R(a);OGATE::P(C),XR(a)
      • R(a);::S(D)
HTML5 logo

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).