MESON Chess Problem Database

Problem Display
PID: 195912 (8/1N6/1n6/1n6/1k6/1P3Q2/1RPNBK2/8 w - - 0 1)

Looijen, JW

Haagsche Post, 1921

8/1N6/1n6/1n6/1k6/1P3Q2/1RPNBK2/8

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.c3#
    • 1...Sc3
      • 2.Qf8#
  • Tries
    • 1.c3+?
      • 1...Sxc3
        • 2.Qf8#
      • 1...Ka3!
  • Keys
    • 1.Ra2!
      • 1...Sd4
        • 2.c3#
      • 1...Sa3
        • 2.c3#
      • 1...Sc3
        • 2.Qf8#
      • 1...Sd6
        • 2.c3#
      • 1...Sa7
        • 2.c3#
      • 1...Sc7
        • 2.c3#
      • 1...Sa4
        • 2.Rxa4#
      • 1...Sc4
        • 2.Ra4#
      • 1...Sd5
        • 2.Ra4#
      • 1...Sd7
        • 2.Ra4#
      • 1...Sa8
        • 2.Ra4#
      • 1...Sc8
        • 2.Ra4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,SBLOCK::P(B)
    • S(b);N_GUARD,SBLOCK::QAB(G)
  • Tries
    • Try
      • P(B);CHECK
      • Vars
        • S(b);SBLOCK,XP(B)::QAB(G)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • S(b);N_GUARD::P(B)
      • S(b);N_GUARD,SBLOCK::QAB(G)
      • S(c);N_GUARD::R1(A),XS(c)
      • S(c);N_GUARD::R1(A)
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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).