MESON Chess Problem Database

Problem Display
PID: 250390 (3KN1b1/B7/4p1QR/3k4/Pp6/3N3p/8/8 w - - 0 1)

Briggs, A

English Mechanic and World of Science, 1884

(First published on Fri Aug 29 1884)

3KN1b1/B7/4p1QR/3k4/Pp6/3N3p/8/8

#2

7 + 5

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qe4#
    • 1...Bh7
      • 2.Qxe6#
    • 1...e5
      • 2.Qc6#
  • Tries
    • 1.Sf4+?
      • 1...Kc4
        • 2.Qc2#
        • 2.Qd3#
      • 1...Kc6
        • 2.Qe4#
      • 1...Ke5!
    • 1.Rh4?
      • threat
        • 2.Qe4#
      • 1...Kc6
        • 2.Qe4#
      • 1...e5
        • 2.Sxb4#
        • 2.Sc7#
        • 2.Qd6#
      • 1...Bh7!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Qe4#
        • 2.Qg5#
      • 1...Kc6
        • 2.Qe4#
      • 1...Bh7
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);N_GUARD,P_SPINP(d),S_FLIGHT::QAB(C)
    • B(e);N_GUARD::QAB1(C),XP(d)
    • P(d);OGATE::QAB1(C)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(c);N_GUARD,P_SPINP(d),S_FLIGHT::QAB(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(D);
      • Threat
        • QAB1(C)
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT::QAB(C)
      • Refutation
        • B(e);
  • Actual
    • S(A);
    • Threat
      • QAB1(C)
    • Vars
      • K(c);N_GUARD,S_FLIGHT::QAB1(C)
      • K(c);P_SPINP(d),S_FLIGHT::QAB(C)
      • B(e);N_GUARD::QAB1(C),XP(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).