MESON Chess Problem Database

Problem Display
PID: 181138 (1N2K3/n7/1p6/n2kBB2/3P4/5p2/2P2p2/4bQ2 w - - 0 1)

van Dijk, Johannes

Schaakblad, 1904

1N2K3/n7/1p6/n2kBB2/3P4/5p2/2P2p2/4bQ2

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.c4#
    • 1...S5c6
      • 2.c4#
    • 1...Sb7
      • 2.c4#
    • 1...Sb5
      • 2.Qxb5#
    • 1...S7c6
      • 2.Qb5#
    • 1...Sc8
      • 2.Qb5#
  • Tries
    • 1.Be4+?
      • 1...Ke6
        • 2.Qh3#
      • 1...Kxe4!
    • 1.Be6+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kxe6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se7#
      • 1...Kxc6
        • 2.Be4#
      • 1...S5xc6
        • 2.c4#
      • 1...S7xc6
        • 2.Qb5#
      • 1...Bb4
        • 2.Sxb4#
      • 1...Sc8
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(d);N_GUARD::P(B)
    • S(g);N_GUARD::QAR2(A),XS(g)
    • S(g);N_GUARD::QAR2(A)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(A)
      • Refutation
        • K(e);S_FLIGHT,XB(E)
    • Try
      • B(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • K(e);S_FLIGHT,XB(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(e);S_FLIGHT,XS(F)::B(E)
      • S(d);N_GUARD,SBLOCK,XS(F)::P(B)
      • S(g);N_GUARD,XS(F)::QAR2(A)
      • B(a);N_GUARD::S(F),XB(a)
      • S(g);N_GUARD::QAR2(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).