MESON Chess Problem Database

Problem Display
PID: 180386 (6B1/1p5R/8/3p4/1nPN4/8/k1P5/2Q4K w - - 0 1)

Lider, Valentin Viktorovich

Freie Presse, 1990

6B1/1p5R/8/3p4/1nPN4/8/k1P5/2Q4K

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.Bxc4#
  • Tries
    • 1.Qb1+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxb1!
  • Keys
    • 1.Rxb7!
      • 1...Sxc2
        • 2.Qb2#
      • 1...dxc4
        • 2.Bxc4#
      • 1...Sd3
        • 2.Ra7#
      • 1...Sa6
        • 2.Qb2#
      • 1...Sc6
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE,P_SPINP(c),XP(D)::B(G),XP(c)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • R(F);XP(d)
    • Vars
      • S(b);XP(C)::QAR1(A)
      • P(c);OGATE,P_SPINP(c),XP(D)::B(G),XP(c)
      • S(b);N_GUARD::R(F)
      • S(b);::QAR1(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).