MESON Chess Problem Database

Problem Display
PID: 197715 (8/3p4/KBNb2N1/3k1P2/4p3/1P6/8/7Q w - - 0 1)

van Eelde, Antonie Clarus Johannes

Haagsche Courant, 1899

8/3p4/KBNb2N1/3k1P2/4p3/1P6/8/7Q

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qxe4#
    • 1...dxc6
      • 2.Qd1#
  • Tries
    • 1.Sf4+?
      • 1...Kxc6
        • 2.Qxe4#
      • 1...Bxf4!
  • Keys
    • 1.Qh6!
      • 1...Kxc6
        • 2.Se7#
      • 1...dxc6
        • 2.Qd2#
      • 1...Bh2
        • 2.Sge7#
      • 1...Ba3
        • 2.Sf4#
      • 1...Bg3
        • 2.Sge7#
      • 1...Bb4
        • 2.Sf4#
      • 1...Bf4
        • 2.Sxf4#
        • 2.Sge7#
      • 1...Bc5
        • 2.Sf4#
      • 1...Be5
        • 2.Sge7#
      • 1...Bc7
        • 2.Sge7#
      • 1...Be7
        • 2.Sf4#
        • 2.Sgxe7#
      • 1...Bb8
        • 2.Sge7#
      • 1...Bf8
        • 2.Sf4#
      • 1...e3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT,XS(F)::QAB(A),XP(a)
    • P(d);SBLOCK,XS(F)::QAR(A)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(F)::QAB(A),XP(a)
      • Refutation
        • B(c);XS(G)
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • K(b);S_FLIGHT,XS(F)::S(G)
      • P(d);SBLOCK,XS(F)::QAR(A)
      • B(c);N_GUARD::S(G)
      • P(a);OGATEB::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).