MESON Chess Problem Database

Problem Display
PID: 219085 (6bq/p4B1p/r2p3P/p7/P7/8/2K2Q2/k2N4 w - - 0 1)

Wainwright, Joseph CJ

Baltimore American and Commercial Advertiser, 1882

6bq/p4B1p/r2p3P/p7/P7/8/2K2Q2/k2N4

#2

6 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qf6
      • 2.Qxf6#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Sb2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Qb2+
        • 2.Sxb2#
      • 1...Qc3+
        • 2.Sxc3#
        • 2.Qxc3#
      • 1...Rc6+
        • 2.Sc3#
      • 1...Bxf7
        • 2.Sc3#
      • 1...d5
        • 2.Sc3#
      • 1...Qe5
        • 2.Se3#
      • 1...Rb6
        • 2.Sb2#
      • 1...Qd4!
    • 1.Qf1?
      • threat
        • 2.Sb2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Qb2+
        • 2.Sxb2#
      • 1...Qc3+
        • 2.Sxc3#
      • 1...Rc6+
        • 2.Sc3#
      • 1...Bxf7
        • 2.Sc3#
      • 1...d5
        • 2.Sc3#
      • 1...Qe5
        • 2.Se3#
      • 1...Qf6
        • 2.Sf2#
        • 2.Qxf6#
      • 1...Rb6
        • 2.Sb2#
      • 1...Qd4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Sb2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Qb2+
        • 2.Sxb2#
      • 1...Qc3+
        • 2.Sxc3#
      • 1...Rc6+
        • 2.Sc3#
      • 1...Bxf7
        • 2.Sc3#
      • 1...d5
        • 2.Sc3#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qe5
        • 2.Se3#
      • 1...Qf6
        • 2.Sf2#
      • 1...Qg7
        • 2.Qxg7#
      • 1...Rb6
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • Q(h);N_GUARD::QAB(C),XQ(h)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • Q(h);CHECK::QAR(C)+S(A),XQ(h)
        • R(c);CHECK::QAR(C)+S(A)
        • B(g);XB(F)::QAR(C)+S(A)
        • P(d);::QAR(C)+S(A)
        • Q(h);::QAR(C)+S(A)
        • R(c);::QAR(C)+S(A)
      • Refutation
        • Q(h);
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • Q(h);CHECK::QAR(C)+S(A),XQ(h)
        • R(c);CHECK::QAR(C)+S(A)
        • B(g);XB(F)::QAR(C)+S(A)
        • P(d);::QAR(C)+S(A)
        • Q(h);::QAR(C)+S(A)
        • R(c);::QAR(C)+S(A)
      • Refutation
        • Q(h);
  • Actual
    • Q(C);
    • Threat
      • DUALS(4)
    • Vars
      • Q(h);CHECK::QAR(C)+S(A),XQ(h)
      • R(c);CHECK::QAR(C)+S(A)
      • B(g);XB(F)::QAR(C)+S(A)
      • P(d);::QAR(C)+S(A)
      • Q(h);N_GUARD::QAB(C),XQ(h)
      • Q(h);::QAR(C)+S(A)
      • R(c);::QAR(C)+S(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).