MESON Chess Problem Database

Problem Display
PID: 87982 (1BB5/8/5P2/3p1RPn/4k3/1N6/3KP1n1/5N2 w - - 0 1)

Shedey, Sergey Oleksandrovich

1st Prize, Buletin Problemistic, 1976

1BB5/8/5P2/3p1RPn/4k3/1N6/3KP1n1/5N2

#2

9 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sgf4
      • 2.Re5#
    • 1...Sg3
      • 2.Sxg3#
    • 1...Shf4
      • 2.Sg3#
      • 2.Re5#
    • 1...Sxf6
      • 2.Sg3#
    • 1...Sg7
      • 2.Sg3#
    • 1...d4
      • 2.Sc5#
  • Tries
    • 1.Bh2?
      • threat
        • 2.Re5#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Shf4
        • 2.Sg3#
      • 1...Sgf4!
    • 1.Rf4+?
      • 1...Shxf4
        • 2.Sg3#
      • 1...Sgxf4!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Bf5#
      • 1...d4
        • 2.Bb7#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sgf4
        • 2.Re3#
      • 1...Sh4
        • 2.Re3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Shf4
        • 2.Sg3#
      • 1...Sg7
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);SBLOCK::R1(E)
    • S(d);N_GUARD::S(A),XS(d)
    • S(d);N_GUARD,XP(G)::S(A)
    • S(d);N_GUARD::S(A)
    • P(c);SBLOCK::S(D)
  • Tries
    • Try
      • B(H);
      • Threat
        • R1(E)
      • Vars
        • S(d);N_GUARD::S(A),XS(d)
        • S(d);N_GUARD::S(A)
      • Refutation
        • S(a);
    • Try
      • R(E);CHECK
      • Vars
        • S(d);XR(E)::S(A)
      • Refutation
        • S(a);XR(E)
  • Actual
    • R(E);
    • Threat
      • B(I)
    • Vars
      • P(c);OGATEB::B(I)
      • S(a);N_GUARD::R1(E),XS(a)
      • S(a);N_GUARD::R1(E)
      • S(d);N_GUARD::S(A),XS(d)
      • S(d);N_GUARD::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).