MESON Chess Problem Database

Problem Display
PID: 214689 (2K5/p7/P1k5/2B5/p1P5/P2N4/1nQ1P3/2b5 w - - 0 1)

Klark, Dmitry Vasilevich

Vsemirnaya Illustrantiya, 1877

2K5/p7/P1k5/2B5/p1P5/P2N4/1nQ1P3/2b5

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qxa4#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qb5#
        • 2.Qb7#
      • 1...Sxd3
        • 2.Qb5#
      • 1...Sxc4
        • 2.Qb7#
      • 1...axb3!
    • 1.Qxb2?
      • threat
        • 2.Qf6#
        • 2.Qb5#
        • 2.Qb7#
      • 1...Bf4
        • 2.Qb5#
        • 2.Qb7#
      • 1...Bg5
        • 2.Qb5#
        • 2.Qb7#
      • 1...Bxb2!
  • Keys
    • 1.Qb1!
      • 1...Sxd3
        • 2.Qb5#
      • 1...Sxc4
        • 2.Qb7#
      • 1...Bd2
        • 2.Qh1#
      • 1...Be3
        • 2.Qh1#
      • 1...Bf4
        • 2.Qh1#
      • 1...Bg5
        • 2.Qh1#
      • 1...Bh6
        • 2.Qh1#
      • 1...Sd1
        • 2.Qb5#
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD::QAB(A),XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XS(D)::QAB1(A)
        • S(b);XP(E)::QAB1(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • S(b);OGATE,XS(D)::QAB1(A)
      • S(b);OGATE,XP(E)::QAB1(A)
      • B(a);OGATE::QAB(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).