MESON Chess Problem Database

Problem Display
PID: 132544 (8/pb5p/1k5K/nPp3R1/3N1Q2/4N3/8/8 w - - 0 1)

Koltanowski, George

Source?, 0000

8/pb5p/1k5K/nPp3R1/3N1Q2/4N3/8/8

#2

6 + 6

2425 San Francisco Chronicle 0000

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sc6
      • 2.Sc4#
  • Tries
    • 1.Qd6+?
      • 1...Sc6
        • 2.Sc4#
      • 1...Bc6!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Sd5#
        • 2.Qd8#
      • 1...cxd4
        • 2.Qd8#
      • 1...Sb3
        • 2.Sc4#
        • 2.Qd8#
      • 1...Sc4
        • 2.Sxc4#
        • 2.Qd8#
      • 1...Sc6
        • 2.Sc4#
      • 1...c4
        • 2.Qd8#
      • 1...a6
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(A)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • Q(C);P_PINB(e)
    • Threat
      • DUALS(2)
    • Vars
      • P(b);XS(B)::QAB(C)
      • S(a);N_GUARD::S(A)
      • P(b);::QAB(C)
      • P(d);::S(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).