MESON Chess Problem Database

Problem Display
PID: 93712 (8/8/K1Nn3Q/2pkN3/8/5P2/1P2P3/8 w - - 0 1)

Aliquis, H

Ceske listy sachove, 1897

8/8/K1Nn3Q/2pkN3/8/5P2/1P2P3/8

#2

7 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.e4#
    • 1...Sb5
      • 2.e4#
    • 1...Sf5
      • 2.e4#
    • 1...Sb7
      • 2.e4#
    • 1...Sf7
      • 2.e4#
    • 1...Sc8
      • 2.e4#
    • 1...Se8
      • 2.e4#
  • Tries
    • 1.Qg6?
      • 1...Se4
        • 2.fxe4#
      • 1...Sc4
        • 2.e4#
      • 1...Sb5
        • 2.e4#
      • 1...Sf5
        • 2.e4#
      • 1...Sb7
        • 2.e4#
      • 1...Sf7
        • 2.e4#
      • 1...Sc8
        • 2.e4#
      • 1...Se8
        • 2.e4#
      • 1...c4!
  • Keys
    • 1.Sc4!
      • 1...Kxc4
        • 2.Qe6#
      • 1...Kxc6
        • 2.Qxd6#
      • 1...Sxc4
        • 2.e4#
      • 1...Se4
        • 2.Se3#
        • 2.Sb6#
      • 1...Sb5
        • 2.Se3#
        • 2.Sb6#
      • 1...Sf5
        • 2.Sb6#
      • 1...Sb7
        • 2.Se3#
        • 2.Sb6#
      • 1...Sf7
        • 2.Se3#
        • 2.Sb6#
      • 1...Sc8
        • 2.Se3#
      • 1...Se8
        • 2.Se3#
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::P(B)
  • Tries
    • Try
      • Q(G);
      • Vars
        • S(c);OGATE::P(C),XS(c)
        • S(c);N_GUARD::P(B)
      • Refutation
        • P(a);
  • Actual
    • S(D);
    • Vars
      • K(b);S_FLIGHT,XS(D)::QAB(G)
      • K(b);P_SPINS(c),S_FLIGHT,XS(F)::QAR1(G),XS(c)
      • S(c);N_GUARD,SBLOCK,XS(D)::P(B)
      • S(c);::S(D)
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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).