MESON Chess Problem Database

Problem Display
PID: 26809 (2b1R2K/6p1/1R2PPQ1/r2Nk3/1N1pnp2/Bq1p2p1/5P2/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 2001

2b1R2K/6p1/1R2PPQ1/r2Nk3/1N1pnp2/Bq1p2p1/5P2/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Sxd3#
    • 1...Rxd5
      • 2.Sc6#
    • 1...Bxe6
      • 2.Rbxe6#
      • 2.Rexe6#
    • 1...Bd7
      • 2.exd7#
  • Tries
    • 1.f3?
      • threat
        • 2.Qxe4#
      • 1...Qxd5
        • 2.Sxd3#
      • 1...Rxd5
        • 2.Sc6#
      • 1...Sxf6
        • 2.Qg5#
      • 1...Sd2
        • 2.Qg5#
      • 1...Sf2
        • 2.Qg5#
      • 1...Sc3
        • 2.Qg5#
      • 1...Sc5
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd6!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qf5#
      • 1...Qxe6
        • 2.Sxd3#
      • 1...Bxe6
        • 2.Sbc6#
      • 1...Sd6
        • 2.Sec6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD,SBLOCK,XS(D)::S(C),XP(b)
    • R(g);SBLOCK,XS(D)::S(C)
    • B(j);OGATE::R(I)+P(F),XB(j)
  • Tries
    • Try
      • P(A);
      • Threat
        • QAR1(H),XS(e)
      • Vars
        • Q(a);N_GUARD,SBLOCK,XS(D)::S(C),XP(b)
        • R(g);SBLOCK,XS(D)::S(C)
        • S(e);N_GUARD,XP(G)::QAR2(H)
        • S(e);N_GUARD::QAR2(H)
        • S(e);N_GUARD::QAR2(H),XS(e)
      • Refutation
        • S(e);
  • Actual
    • S(D);
    • Threat
      • QAR1(H)
    • Vars
      • Q(a);N_GUARD,XP(F)::S(C),XP(b)
      • B(j);SBLOCK,XP(F)::S(C)
      • S(e);SBLOCK::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).