MESON Chess Problem Database

Problem Display
PID: 206408 (8/4QpN1/n4P1p/3pp3/3Nk3/5R2/8/K4nB1 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1925

8/4QpN1/n4P1p/3pp3/3Nk3/5R2/8/K4nB1

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qg4#
        • 2.Qf5#
      • 1...exd4
        • 2.Qf5#
      • 1...Sh2
        • 2.Qf5#
      • 1...Sg3
        • 2.Qg4#
      • 1...h5
        • 2.Qf5#
      • 1...Se3!
  • Keys
    • 1.Sge6!
      • 1...exd4
        • 2.Sxd4#
        • 2.Sg5#
      • 1...fxe6
        • 2.Qh7#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sb4
        • 2.Sc5#
      • 1...Sd2
        • 2.Re3#
      • 1...Sh2
        • 2.Re3#
      • 1...Sg3
        • 2.Re3#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sc7
        • 2.Sc5#
      • 1...Sb8
        • 2.Sc5#
      • 1...h5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);XS(D)::QAB1(F)
        • S(a);::QAB1(F)
        • S(a);::QAR2(F)
        • P(f);::QAB1(F)
      • Refutation
        • S(a);
  • Actual
    • S(G);N_PINP(d)
    • Vars
      • P(g);OGATE,XS(G)::QAB(F)
      • S(a);N_GUARD::R1(C),XS(a)
      • S(e);N_GUARD::S(G)
      • S(a);N_GUARD::R1(C)
      • S(e);N_GUARD::S(G),XS(e)
      • P(f);N_GUARD::S(G)
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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).