MESON Chess Problem Database

Problem Display
PID: 181137 (8/8/1N6/2PP2p1/3k2p1/6P1/5N2/4Q1BK w - - 0 1)

van Dijk, Johannes

Schaakblad, 1904

8/8/1N6/2PP2p1/3k2p1/6P1/5N2/4Q1BK

#2

8 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sa4?
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qe4#
      • 1...Kc4!
    • 1.Sd7?
      • 1...Kxd5
        • 2.Qe4#
      • 1...Kc4!
  • Keys
    • 1.Qb1!
      • 1...Kc3
        • 2.Se4#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxc5
        • 2.Se4#
      • 1...Ke5
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT,XP(G)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(H);
      • Vars
        • K(a);P-FLIGHT,XP(G)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::S(D)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT,XP(F)::B(B)+S(D),DCHECK
      • K(a);S_FLIGHT::S(D),XP(b)
HTML5 logo

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).