MESON Chess Problem Database

Problem Display
PID: 30865 (4nR2/8/3qp3/1pp3p1/4k1P1/1Q1N2pK/8/2N3B1 w - - 0 1)

Abbott, Joseph William

The Westminster Papers, 1875

4nR2/8/3qp3/1pp3p1/4k1P1/1Q1N2pK/8/2N3B1

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Qxe6#
    • 1...Qd8
      • 2.Qxe6#
  • Tries
    • 1.Qxe6+?
      • 1...Qe5
        • 2.Sxc5#
        • 2.Qxe5#
      • 1...Qxe6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qg2#
      • 1...Qxf8
        • 2.Qa8#
      • 1...Qxd3
        • 2.Qxe6#
      • 1...Qf4
        • 2.Qa8#
      • 1...g2
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD,XS(D)::QAR2(C),XP(g)
    • Q(f);N_GUARD::QAR2(C),XP(g)
  • Tries
    • Try
      • Q(C);CHECK,XP(g)
      • Refutation
        • Q(f);P_PINP(F),XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • Q(f);N_GUARD,XR(G)::QAB(C)
      • Q(f);N_GUARD,XS(D)::QAR2(C),XP(g)
      • Q(f);N_GUARD::QAB(C)
      • P(a);::QAB(C),XP(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).