MESON Chess Problem Database

Problem Display
PID: 241558 (1Q4nk/4pp1n/4NPp1/K2p1P2/8/p6R/8/B5rb w - - 0 1)

Novitski, Petr Adrinovich

Variantim, 2014

1Q4nk/4pp1n/4NPp1/K2p1P2/8/p6R/8/B5rb

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...exf6
      • 2.Bxf6#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sxf7#
        • 2.Rxh7#
      • 1...exf6
        • 2.Bxf6#
        • 2.Rxh7#
      • 1...Rxg5!
    • 1.Sd8?
      • threat
        • 2.Sxf7#
      • 1...Sxf6
        • 2.Se6#
      • 1...exf6!
    • 1.Qh2?
      • threat
        • 2.Rxh7#
      • 1...Sxf6
        • 2.Qb8#
      • 1...Sh6!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Rxh7#
      • 1...Sxf6
        • 2.Se6#
      • 1...Sh6
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATE,P_SPINP(f),XP(F)::B(A),XP(f)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Refutation
        • R(a);XS(E)
    • Try
      • S(E);
      • Threat
        • S(E),XP(g)
      • Vars
        • S(i);N_SPINS(h),P_SPINS(i),XP(F)::QAR(G)+S(E)
      • Refutation
        • P(f);P_SPINP(f),XP(F)
    • Try
      • Q(G);
      • Threat
        • R1(B),XS(h)
      • Vars
        • S(i);N_SPINS(h),OGATEB,P_SPINS(i),XP(F)::QAR(G)
      • Refutation
        • S(i);N_SPINS(h)
  • Actual
    • S(E);
    • Threat
      • R1(B),XS(h)
    • Vars
      • S(i);N_SPINS(h),P_SPINS(i),XP(F)::QAR(G)+S(E)
      • S(i);N_SPINS(h)::QAR(G)+S(E),DCHECK,XP(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).