MESON Chess Problem Database

Problem Display
PID: 70978 (3nQ1b1/2bn2p1/1p1pP3/1BBk4/2p1NRN1/2R5/8/7K w - - 0 1)

Sheppard, Charles William

Good Companions, 1918

3nQ1b1/2bn2p1/1p1pP3/1BBk4/2p1NRN1/2R5/8/7K

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Se3#
    • 1...Sf6
      • 2.Bxc4#
    • 1...Sb8
      • 2.Bxc4#
    • 1...Sf8
      • 2.Bxc4#
    • 1...Sc6
      • 2.Bxc4#
    • 1...Sxe6
      • 2.Qa8#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Rd2#
      • 1...Sxc5
        • 2.Sc3#
      • 1...Sxe6
        • 2.Qa8#
      • 1...Se5
        • 2.Se3#
      • 1...Sc6
        • 2.Bxc4#
      • 1...c3!
    • 1.Rxc4?
      • threat
        • 2.Sc3#
        • 2.Rd4#
      • 1...Sxc5
        • 2.Sc3#
        • 2.Rf5#
      • 1...Sxe6
        • 2.Sc3#
        • 2.Qa8#
      • 1...bxc5
        • 2.Sc3#
      • 1...Sc6
        • 2.Sc3#
      • 1...dxc5!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Rd1#
      • 1...Sxc5
        • 2.Sc3#
      • 1...Sxe6
        • 2.Qa8#
      • 1...Se5
        • 2.Se3#
      • 1...Sc6
        • 2.Bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(f);SBLOCK::S(E)
    • S(f);::B(F),XP(a)
    • S(h);SBLOCK::B(F),XP(a)
    • S(h);OGATE,SBLOCK,XP(H)::QAB(I)
  • Tries
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • S(f);SBLOCK,XB(G)::S(C)
        • S(h);OGATE,SBLOCK,XP(H)::QAB(I)
        • S(f);SBLOCK::S(E)
        • S(h);SBLOCK::B(F),XP(a)
      • Refutation
        • P(a);
    • Try
      • R(B);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XB(G)::S(C)
        • S(h);::S(C)
      • Refutation
        • P(d);XB(G)
  • Actual
    • R(B);
    • Threat
      • R(B)
    • Vars
      • S(f);SBLOCK,XB(G)::S(C)
      • S(h);OGATE,SBLOCK,XP(H)::QAB(I)
      • S(f);SBLOCK::S(E)
      • S(h);SBLOCK::B(F),XP(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).