MESON Chess Problem Database

Problem Display
PID: 17990 (8/7K/Q7/3pNn2/1R1Pkp2/5p2/3P4/4n3 w - - 0 1)

Mikan, Ilja

Straz lidu, 1952

8/7K/Q7/3pNn2/1R1Pkp2/5p2/3P4/4n3

#2

6 + 6

5505 Dobrodruzstvi 64 poli 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qd3#
    • 1...Sg2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
  • Tries
    • 1.d3+?
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Ke3!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sg5#
      • 1...Sxd4
        • 2.Qg6#
      • 1...Se3
        • 2.Sd6#
      • 1...Sg3
        • 2.Sd6#
      • 1...Sh4
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sh6
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...Sg7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAB1(E)
    • S(a);N_GUARD::QAB1(E),XS(a)
  • Tries
    • Try
      • P(A);CHECK
      • Vars
        • S(a);OGATE,XP(A)::QAB1(E),XS(a)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(f);OGATEB,P_SPINS(f),XP(C)::QAB(E)
      • S(f);N_GUARD::S(D)
      • S(f);N_GUARD::S(D),XS(f)
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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).