MESON Chess Problem Database

Problem Display
PID: 71618 (8/3n3N/1n1Q1p2/1p1P1k1P/q4P2/5B2/2p3K1/8 w - - 0 1)

Kopyl, Valery Volodimirovich

The Problemist, 2007

8/3n3N/1n1Q1p2/1p1P1k1P/q4P2/5B2/2p3K1/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qe6#
    • 1...Sc5
      • 2.Qxf6#
    • 1...Se5
      • 2.Qxf6#
    • 1...Sb8
      • 2.Qxf6#
    • 1...Sf8
      • 2.Qxf6#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Bg4#
      • 1...Sxf6
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Qe4
        • 2.Bxe4#
      • 1...Qxf4!
  • Keys
    • 1.Kg3!
      • threat
        • 2.Qe6#
      • 1...Qxf4+
        • 2.Qxf4#
      • 1...Sxd5
        • 2.Qxd7#
      • 1...Qe4
        • 2.Bg4#
      • 1...Sc5
        • 2.Qxf6#
      • 1...Sf8
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);SBLOCK,XP(C)::QAB1(F)
    • S(g);N_GUARD::QAR1(F),XP(f)
  • Tries
    • Try
      • S(G);XP(f)
      • Threat
        • B(B)
      • Vars
        • S(g);N_GUARD,XS(G)::QAR1(F)
        • S(g);N_GUARD::QAR1(F),XS(g)
        • Q(b);N_GUARD,P_PINB(B)::B(B),XQ(b)
      • Refutation
        • Q(b);XP(C)
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAB1(F)
    • Vars
      • Q(b);CHECK,OGATE,XP(C)::QAR1(F),XQ(b)
      • S(e);N_GUARD,XP(D)::QAB(F),XS(g)
      • Q(b);SBLOCK::B(B)
      • S(g);N_GUARD::QAR1(F),XP(f)
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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).