MESON Chess Problem Database

Problem Display
PID: 143013 (8/B3r2p/p2R4/5p2/3Nk3/R7/1Q4bK/n5N1 w - - 0 1)

Janet, Frank

British Chess Magazine, 1916

8/B3r2p/p2R4/5p2/3Nk3/R7/1Q4bK/n5N1

#2

7 + 7

14868 Pirnie Collection 2011
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qe2#
  • Keys
    • 1.Ra4!
      • threat
        • 2.Sc2#
        • 2.Sde2#
        • 2.Sb3#
        • 2.Sdf3#
        • 2.Sb5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Kd3
        • 2.Sdf3#
      • 1...Ke3
        • 2.Sc2#
        • 2.Sxf5#
      • 1...Kf4
        • 2.Se6#
      • 1...Ke5
        • 2.Sb5#
      • 1...Rxa7
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Re6
        • 2.Sc2#
        • 2.Sde2#
        • 2.Sb3#
        • 2.Sdf3#
        • 2.Sb5#
        • 2.Sc6#
        • 2.Sxe6#
      • 1...Rb7
        • 2.Sb5#
      • 1...Rc7
        • 2.Sc6#
      • 1...Bf1
        • 2.Sde2#
      • 1...Bf3
        • 2.Sc2#
        • 2.Sde2#
        • 2.Sb3#
        • 2.Sdxf3#
        • 2.Sb5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Sb3
        • 2.Sxb3#
      • 1...f4
        • 2.Qe2#

This anticipates 185898(1923)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::QAR2(B)
  • Actual
    • R(D);
    • Threat
      • DUALS(7)
    • Vars
      • K(c);S_FLIGHT::R(F)+S(E)
      • K(c);P-FLIGHT::R(D)+S(E),DCHECK
      • K(c);P-FLIGHT::QAB(B)+S(E)
      • R(f);XB(G)::R(D)+S(E)
      • S(a);::R(D)+S(E),XS(a)
      • R(f);::R(D)+S(E)
      • B(b);::R(D)+S(E)
      • P(d);SBLOCK::QAR2(B)
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).