MESON Chess Problem Database

Problem Display
PID: 93773 (8/p2n4/N2K4/k7/r1P5/p2P4/P7/6Q1 w - - 0 1)

Isvolsky, NA

Ceske listy sachove, 1898

8/p2n4/N2K4/k7/r1P5/p2P4/P7/6Q1

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5+?
      • 1...Kxa6
        • 2.Qb5#
      • 1...Sxc5!
  • Keys
    • 1.Sb4!
      • 1...Kxb4
        • 2.Qe1#
      • 1...Rxb4
        • 2.Qxa7#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Se5
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#
      • 1...Sb8
        • 2.Qc5#
      • 1...Sf8
        • 2.Qc5#
      • 1...a6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • S(e);XQ(A)
  • Actual
    • S(E);
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(E)::QAB(A)
      • R(b);SBLOCK,XS(E)::QAR2(A),XP(d)
      • S(e);N_GUARD::QAR2(A),XS(e)
      • S(e);N_GUARD::QAR2(A)
      • P(d);SBLOCK::S(E)
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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).