MESON Chess Problem Database

Problem Display
PID: 255336 (8/2Qpk1N1/4p1K1/8/3P4/8/8/8 w - - 0 1)

Shtang, Arina

Kudesnik, 2021

8/2Qpk1N1/4p1K1/8/3P4/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qd8#
  • Tries
    • 1.Sf5+?
      • 1...Ke8
        • 2.Qb8#
        • 2.Qc8#
      • 1...Kf8
        • 2.Qb8#
        • 2.Qd8#
        • 2.Qc8#
      • 1...exf5!
    • 1.Qxd7+?
      • 1...Kf8
        • 2.Qe8#
        • 2.Qf7#
        • 2.Qd8#
      • 1...Kxd7!
  • Keys
    • 1.Sxe6!
      • 1...Kxe6
        • 2.Qe5#
      • 1...Ke8
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_GUARD,N_SPINP(b),S_FLIGHT::QAR2(C)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • P(a);XS(D)
    • Try
      • Q(C);CHECK,XP(b)
      • Refutation
        • K(c);P-FLIGHT,XQ(C)
  • Actual
    • S(D);XP(a)
    • Vars
      • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • K(c);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(C)
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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).