Problem Display
PID: 184338 (1bB1bN1B/q2p1k1K/1p6/8/p3P3/Q7/8/8 w - - 0 1)

Janet, Frank

British Chess Magazine, 1916

1bB1bN1B/q2p1k1K/1p6/8/p3P3/Q7/8/8

#2

6 + 7


SOLUTION


  • SOUND
  • Sets
    • 1...d5
      • 2.Be6#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qf6#
        • 2.Qg7#
      • 1...Ke7
        • 2.Qf6#
      • 1...Kxf8
        • 2.Qg7#
      • 1...Be5!
    • 1.Qa1?
      • threat
        • 2.Qf6#
        • 2.Qg7#
      • 1...Ke7
        • 2.Qf6#
      • 1...Kxf8
        • 2.Qg7#
      • 1...Be5!
    • 1.Qc3?
      • threat
        • 2.Qf6#
        • 2.Qg7#
      • 1...Ke7
        • 2.Qf6#
      • 1...Kxf8
        • 2.Qg7#
      • 1...Be5!
    • 1.Qf3+?
      • 1...Ke7
        • 2.Qf6#
      • 1...Bf4!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qe7#
      • 1...Ke6
        • 2.Qe7#
      • 1...Bd6
        • 2.Qa2#
      • 1...d5
        • 2.Qf8#
      • 1...d6
        • 2.Qf3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATE::B(D)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT::QAB1(A)
        • K(e);P-FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • B(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT::QAB1(A)
        • K(e);P-FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • B(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT::QAB1(A)
        • K(e);P-FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • B(f);
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(A)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • S(E);
    • Threat
      • QAR1(A)
    • Vars
      • K(e);P_SPINP(d),S_FLIGHT::QAR1(A)
      • B(f);S_CUTP(d)::QAB(A)
      • P(d);::QAR1(A)
      • P(d);S_CUTB(f)::QAR(A)


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).