MESON Chess Problem Database

Problem Display
PID: 190235 (8/4Npr1/5kp1/2B3N1/2pK3P/7Q/5p1p/5n1q w - - 0 1)

Makaronets, Leonid

Schweizerische Schachzeitung, 1972

8/4Npr1/5kp1/2B3N1/2pK3P/7Q/5p1p/5n1q

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxf3#
    • 1...Qe4+
      • 2.Sxe4#
    • 1...Qd5+
      • 2.Sxd5#
    • 1...Qg1
      • 2.Se4#
      • 2.Sd5#
      • 2.Qf3#
  • Keys
    • 1.Qc3!
      • threat
        • 2.Kxc4#
      • 1...Qe4+
        • 2.Kxe4#
      • 1...Qd5+
        • 2.Kxd5#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Sd2
        • 2.Ke3#
      • 1...Se3
        • 2.Kxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::QAR(A),XQ(b)
    • Q(b);CHECK,N_GUARD::S(E),XQ(b)
    • Q(b);CHECK,N_GUARD::S(F),XQ(b)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+K(B),XP(e)
    • Vars
      • Q(b);CHECK::QAB(A)+K(B),XQ(b)
      • Q(b);N_GUARD::QAR(A),XQ(b)
      • S(a);::QAB(A)+K(B)
      • S(a);::QAB(A)+K(B),XS(a)
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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).