MESON Chess Problem Database

Problem Display
PID: 64722 (7K/6n1/1Q6/3Nk1Pn/1p3NB1/3P4/3P4/5q2 w - - 0 1)

Pickering, GE

Chess Amateur (The), 1910

7K/6n1/1Q6/3Nk1Pn/1p3NB1/3P4/3P4/5q2

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Qf6#
    • 1...Sf6
      • 2.Qxf6#
  • Tries
    • 1.Qd6+?
      • 1...Kd4
        • 2.Sc3#
        • 2.Se3#
        • 2.Sxb4#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...Kxd6!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Sxe6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sg6#
      • 1...Kxf4
        • 2.Qe3#
      • 1...Qxd3
        • 2.Sxd3#
      • 1...Qxf4
        • 2.Qc5#
      • 1...Sxf4
        • 2.d4#
      • 1...Sxf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD::QAB1(G)
    • S(d);N_GUARD::QAB1(G),XS(d)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • S(e);XQ(G)
  • Actual
    • S(E);
    • Threat
      • S(C)
    • Vars
      • K(c);S_FLIGHT,XS(C)::QAB1(G)
      • Q(a);XP(B)::S(C),XQ(a)
      • Q(a);SBLOCK,XS(C)::QAR2(G)
      • S(d);SBLOCK,XS(C)::P(B)
      • S(d);OGATE,XS(E)::QAB1(G),XS(d)
HTML5 logo

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).