MESON Chess Problem Database

Problem Display
PID: 17985 (2b5/6N1/8/2K1k1N1/8/8/6n1/5Q2 w - - 0 1)

Sutter, Alfred Ernst

Schweizerische Schachzeitung, 1952

2b5/6N1/8/2K1k1N1/8/8/6n1/5Q2

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qxf5#
    • 1...Ba6
      • 2.Qf5#
    • 1...Bb7
      • 2.Qf5#
    • 1...Sf4
      • 2.Qa1#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Sf7#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sf4
        • 2.Qc3#
      • 1...Be6!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Qf6#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Bf5
        • 2.Qa1#

This anticipates 48043(1969)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD::QAR1(A),XB(c)
    • B(c);N_GUARD::QAR1(A)
    • S(a);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • B(c);N_GUARD::QAR1(A),XB(c)
        • S(a);SBLOCK::QAB(A)
      • Refutation
        • B(c);
  • Actual
    • S(D);
    • Threat
      • QAB1(A)
    • Vars
      • S(a);N_GUARD::QAB1(A),XS(a)
      • B(c);SBLOCK::QAB(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).