MESON Chess Problem Database

Problem Display
PID: 161540 (Q7/8/8/Rn3N2/5k2/5PNK/5P2/8 w - - 0 1)

Arnell, Alfred Wilhelm Theodor

Vom Fels zum Meer, 1885

Q7/8/8/Rn3N2/5k2/5PNK/5P2/8

#2

7 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Kh4?
      • threat
        • 2.Qe4#
      • 1...Sc3
        • 2.Sh5#
      • 1...Sd6
        • 2.Se2#
        • 2.Sh5#
      • 1...Ke5!
    • 1.Qe8?
      • threat
        • 2.Qe3#
      • 1...Kxf3
        • 2.Qe3#
      • 1...Kg5!
  • Keys
    • 1.Qf8!
      • 1...Kxf3
        • 2.Se3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Ke5
        • 2.Qd6#
      • 1...Kg5
        • 2.Qh6#
      • 1...Sa3
        • 2.Se3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Sc3
        • 2.Se3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sa7
        • 2.Se3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Sc7
        • 2.Se3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#

This is a version of 161539

FEATURES

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