MESON Chess Problem Database

Problem Display
PID: 105440 (8/b2n3r/5P2/3N1R2/4k1Pp/p1PN3R/1p6/n2B3K w - - 0 1)

Erokhin, Vladimir Alekseevich

Sovietskaya Tartariya, 1988

8/b2n3r/5P2/3N1R2/4k1Pp/p1PN3R/1p6/n2B3K

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Sxf2#
    • 1...Be3
      • 2.Rxe3#
    • 1...Bb8
      • 2.Sf2#
      • 2.Re3#
    • 1...Sc5
      • 2.Sf2#
      • 2.Re3#
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sb6
      • 2.Sf2#
      • 2.Sc5#
      • 2.Re3#
      • 2.Re5#
    • 1...Sxf6
      • 2.Sxf6#
      • 2.Re5#
    • 1...Sb8
      • 2.Re5#
    • 1...Sf8
      • 2.Re5#
  • Tries
    • 1.Sc5+?
      • 1...Sxc5
        • 2.Re3#
      • 1...Bxc5!
    • 1.Sb6?
      • threat
        • 2.Sf2#
        • 2.Rf4#
      • 1...Sxb6
        • 2.Sf2#
        • 2.Sc5#
        • 2.Re5#
      • 1...Bb8
        • 2.Sf2#
      • 1...Bxb6!
  • Keys
    • 1.S5b4!
      • threat
        • 2.Rf4#
      • 1...Be3
        • 2.Bf3#
      • 1...Bb8
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(f);N_GUARD::S(D),XB(f)
    • B(f);N_GUARD::R1(E),XB(f)
    • S(g);N_GUARD::R1(H),XS(g)
    • S(g);N_GUARD::R1(H)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • S(g);XS(D)::R1(E)
      • Refutation
        • B(f);XS(D)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);::S(D)
      • Refutation
        • B(f);XS(G)
  • Actual
    • S(G);
    • Threat
      • R1(H)
    • Vars
      • B(f);SBLOCK::B(A)
      • B(f);N_GUARD::S(D)
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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).