MESON Chess Problem Database

Problem Display
PID: 121058 (4Q3/3P4/1K3B2/5kpr/6Nb/2N5/4Pn2/3b4 w - - 0 1)

Gold, Samuel

Orillia Packet, 1897

4Q3/3P4/1K3B2/5kpr/6Nb/2N5/4Pn2/3b4

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sh1
      • 2.Qe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sge3#
      • 1...Sxg4
        • 2.e4#
      • 1...Kxg4!
    • 1.Se3+?
      • 1...Kf4
        • 2.Qe5#
      • 1...Kxf6!
  • Keys
    • 1.Be5!
      • threat
        • 2.Se3#
      • 1...Rh6+
        • 2.Sxh6#
      • 1...Kxg4
        • 2.Qe6#
      • 1...Sxg4
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::QAB1(G)
    • S(b);N_GUARD::QAB1(G),XS(b)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD,SBLOCK,XS(C)::P(A)
      • Refutation
        • K(d);S_FLIGHT,XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(G)
      • Refutation
        • K(d);P-FLIGHT,XB(E)
  • Actual
    • B(E);
    • Threat
      • S(C)
    • Vars
      • R(f);CHECK,N_GUARD::S(C),XR(f)
      • K(d);S_FLIGHT,XS(C)::QAB(G)
      • S(b);N_GUARD,SBLOCK,XS(C)::P(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).