MESON Chess Problem Database

Problem Display
PID: 180299 (3R4/1P4K1/p1B5/Pp3P2/1p1nPp2/1P1k1P1R/3P4/3Q4 w - - 0 1)

Lider, Valentin Viktorovich

Scacchi e Scienze Applicate, 1989

3R4/1P4K1/p1B5/Pp3P2/1p1nPp2/1P1k1P1R/3P4/3Q4

#2

12 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bd5?
      • 1...Se6+
        • 2.Bxe6#
      • 1...Sxb3
        • 2.Bxb3#
      • 1...Sxf3
        • 2.Bc6#
      • 1...Sc2
        • 2.Bc4#
      • 1...Se2
        • 2.Bc4#
      • 1...Sc6
        • 2.Bc4#
        • 2.Bxc6#
      • 1...Sxf5+!
  • Keys
    • 1.Bd7!
      • 1...Sxf5+
        • 2.Bxf5#
      • 1...Se6+
        • 2.Bxe6#
      • 1...Sxb3
        • 2.Bxb5#
      • 1...Sxf3
        • 2.Bc6#
      • 1...Sc2
        • 2.Bxb5#
      • 1...Se2
        • 2.Bxb5#
      • 1...Sc6
        • 2.Bxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(I);N_PINS(c)
      • Vars
        • S(c);CHECK,OGATEB::R(L)+B(I),XS(c)
        • S(c);OGATE,XP(C)::R(L)+B(I),XS(c)
        • S(c);OGATEB,P_SPINS(c),XP(D)::R(L)+B(I)
        • S(c);::R(L)+B(I),DCHECK
      • Refutation
        • S(c);CHECK,XP(H)
  • Actual
    • B(I);N_PINS(c)
    • Vars
      • S(c);CHECK,OGATE,XP(H)::R(L)+B(I),XS(c)
      • S(c);CHECK,OGATEB::R(L)+B(I),XS(c)
      • S(c);XP(C)::R(L)+B(I),DCHECK,XP(e)
      • S(c);OGATEB,P_SPINS(c),XP(D)::R(L)+B(I)
      • S(c);::R(L)+B(I),DCHECK,XP(e)
      • S(c);OGATEB::R(L)+B(I),XS(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).