MESON Chess Problem Database

Problem Display
PID: 9620 (k1b5/pppN4/1R6/8/Q7/8/3K4/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Bohemia, 1907

k1b5/pppN4/1R6/8/Q7/8/3K4/8

#2

4 + 5

3310 2345 Chess Problems 1997
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Qxa5#
  • Keys
    • 1.Qc6!
      • 1...Bxd7
        • 2.Qxb7#
      • 1...axb6
        • 2.Qa4#
      • 1...bxc6
        • 2.Rb8#
      • 1...cxb6
        • 2.Qxc8#
      • 1...a5
        • 2.Ra6#
      • 1...a6
        • 2.Rxa6#

This anticipates 76939(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR(B),XP(a)
  • Actual
    • Q(B);N_PINP(a),P_PINP(b)
    • Vars
      • B(e);N_GUARD,XS(D)::QAB1(B),XP(b)
      • P(a);OGATEB,XR(C)::QAR(B)
      • P(b);N_SPINP(b),OGATE,XQ(B)::R1(C)
      • P(c);OGATE,XR(C)::QAR2(B),XB(e)
      • P(a);OGATEB::R(C)
      • P(a);OGATEB::R(C),XP(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).