MESON Chess Problem Database

Problem Display
PID: 50036 (5Q2/8/3RPK2/3P3b/1PpkPR1p/2n1p2q/2P5/8 w - - 0 1)

Preiswerk, Walther Edouard

Schweizerische Schachzeitung, 1907

5Q2/8/3RPK2/3P3b/1PpkPR1p/2n1p2q/2P5/8

#2

9 + 7

1842 The White King 1914

SOLUTION

  • SOUND
  • Keys
    • 1.Qg7!
      • threat
        • 2.Kg5#
        • 2.Ke7#
        • 2.Qa7#
      • 1...Qf5+
        • 2.Kxf5#
      • 1...Qxe6+
        • 2.Kxe6#
      • 1...Sxe4+
        • 2.Ke7#
      • 1...Sxd5+
        • 2.Kg5#
      • 1...Sb1
        • 2.Kg5#
        • 2.Ke7#
      • 1...Sd1
        • 2.Kg5#
        • 2.Ke7#
      • 1...Sa2
        • 2.Kg5#
        • 2.Ke7#
      • 1...Se2
        • 2.Kg5#
        • 2.Ke7#
      • 1...Sa4
        • 2.Kg5#
        • 2.Ke7#
      • 1...Sb5
        • 2.Kg5#
        • 2.Ke7#
      • 1...e2
        • 2.Qa7#
      • 1...Qg2
        • 2.Qa7#
      • 1...Qg4
        • 2.Qa7#
      • 1...Qg3
        • 2.Qa7#
      • 1...Bf7
        • 2.Kg5#
        • 2.Ke7#
        • 2.Kxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Actual
    • Q(I);
    • Threat
      • DUALS(3)
    • Vars
      • Q(c);CHECK::QAB(I)+K(H),XQ(c)
      • Q(c);CHECK,XP(G)::QAB(I)+K(H),XQ(c)
      • S(a);CHECK,P_SPINS(a),XP(C)::QAB(I)+K(H)
      • S(a);CHECK,P_SPINS(a),XP(E)::QAB(I)+K(H)
      • P(b);::QAB(I)
      • Q(c);::QAB(I)
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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).