MESON Chess Problem Database

Problem Display
PID: 16844 (KQ1R4/6p1/1b6/2pPNn1q/4k1P1/5Np1/4P1n1/2BR4 w - - 0 1)

Valve, Leo Erland

Tidskrift for Schack, 1943

KQ1R4/6p1/1b6/2pPNn1q/4k1P1/5Np1/4P1n1/2BR4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Sg5#
    • 1...Qe8
      • 2.Sg5#
    • 1...Qh1
      • 2.Sg5#
    • 1...Qh2
      • 2.Sg5#
    • 1...Qh3
      • 2.Sg5#
    • 1...Qg5
      • 2.Sxg5#
    • 1...Qh7
      • 2.Sg5#
    • 1...Qh8
      • 2.Sg5#
    • 1...Ba5
      • 2.Qb1#
    • 1...Ba7
      • 2.Qb1#
    • 1...Bc7
      • 2.Qb1#
    • 1...Bxd8
      • 2.Qb1#
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qe5#
      • 1...Qe8
        • 2.Sg5#
      • 1...Bc7
        • 2.Qb1#
      • 1...Sfe3
        • 2.Scd2#
      • 1...Sd4
        • 2.Sfd2#
      • 1...Sfh4
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sh6
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 10
  • Sets
    • Q(f);N_GUARD::S(D)
    • Q(f);N_GUARD::S(D),XQ(f)
    • B(g);OGATE::QAB(I)
    • B(g);OGATE,XR(J)::QAB(I)
  • Actual
    • S(G);
    • Threat
      • QAR1(I)
    • Vars
      • Q(f);N_GUARD::S(D)
      • B(g);OGATE::QAB(I)
      • S(e);SBLOCK::S(G)
      • S(e);SBLOCK::S(D)
      • S(e);N_GUARD::S(G)
      • S(e);N_GUARD::S(G),XS(e)
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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).