MESON Chess Problem Database

Problem Display
PID: 169312 (5Q1b/5Pq1/5PPk/4N3/6K1/8/8/8 w - - 0 1)

Lind, Ingemar

Comm., SuperProblem 186. TT, 2017

5Q1b/5Pq1/5PPk/4N3/6K1/8/8/8

#2

6 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qxh8+?
      • 1...Qh7
        • 2.Qxh7#
        • 2.f8Q#
        • 2.f8B#
      • 1...Qxh8!
  • Keys
    • 1.Qg8!
      • 1...Qxg6+
        • 2.Qxg6#
      • 1...Qxf6
        • 2.Qh7#
      • 1...Qxf7
        • 2.Sxf7#
      • 1...Qxg8
        • 2.fxg8S#
      • 1...Qf8
        • 2.Qh7#
      • 1...Qh7
        • 2.Qxh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK,N_PINQ(b),XB(c)
      • Refutation
        • Q(b);N_PINP(D),XQ(F)
  • Actual
    • Q(F);N_PINQ(b)
    • Vars
      • Q(b);CHECK,OGATE,XP(D)::QAR1(F),XQ(b)
      • Q(b);N_GUARD,N_PINP(D),XP(C)::QAR1(F)
      • Q(b);N_PINP(D),XP(E)::S(B),XQ(b)
      • Q(b);OGATE,XQ(F)::PXQ(b)=S
      • Q(b);N_GUARD,N_PINP(D)::QAR1(F)
      • Q(b);N_GUARD,N_PINP(D)::QAR1(F),XQ(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).