MESON Chess Problem Database

Problem Display
PID: 21796 (b3N1Bq/5n2/1p5p/1R1n1R2/P1k2p2/bp6/4P2K/1N4Q1 w - - 0 1)

Sheppard, Charles William

4th HM., Good Companions (December), 1921

b3N1Bq/5n2/1p5p/1R1n1R2/P1k2p2/bp6/4P2K/1N4Q1

#2

9 + 10

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Sxa3#
    • 1...Sc3
      • 2.Sd2#
      • 2.Sxa3#
    • 1...Sb4
      • 2.Sd6#
    • 1...Se5
      • 2.Rxf4#
  • Tries
    • 1.Rxf4+?
      • 1...Qd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Sxf4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qd3#
      • 1...Qc3
        • 2.Sxa3#
      • 1...Qd4
        • 2.Qxb3#
      • 1...Sb4
        • 2.Sd6#
      • 1...Se5
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(j);SBLOCK::S(A),XB(a)
    • S(e);P_SPINS(h),S_CUTB(a)::S(H)
    • S(h);P_SPINS(e),S_CUTQ(j)::R(G),XP(d)
  • Tries
    • Try
      • R(G);CHECK,XP(d)
      • Refutation
        • S(e);P_SPINS(h),XR(G)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • Q(j);SBLOCK::S(A),XB(a)
      • Q(j);SBLOCK::QAB1(B),XP(b)
      • S(e);P_SPINS(h),S_CUTB(a)::S(H)
      • S(h);P_SPINS(e),S_CUTQ(j)::R(G),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).