MESON Chess Problem Database

Problem Display
PID: 20934 (1rr4B/pn1Q1pRB/K2b2qn/2p4N/2Ppk1NR/4p1p1/4P3/5b2 w - - 0 1)

Guidelli, Giorgio

3rd Prize, Good Companions (December), 1914

1rr4B/pn1Q1pRB/K2b2qn/2p4N/2Ppk1NR/4p1p1/4P3/5b2

#2

10 + 14

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4+
      • 2.Shf6#
    • 1...Be5+
      • 2.Sgf6#
  • Tries
    • 1.Qe6+?
      • 1...Be5
        • 2.Sf2#
        • 2.Sgf6#
        • 2.Sxh6#
      • 1...fxe6!
  • Keys
    • 1.Rxf7!
      • threat
        • 2.Sf2#
      • 1...Rc6+
        • 2.Qxc6#
      • 1...Bf4+
        • 2.Shf6#
      • 1...Be5+
        • 2.Sgf6#
      • 1...Bc7+
        • 2.Qc6#
      • 1...Be7+
        • 2.Qe6#
      • 1...Bf8+
        • 2.Qe6#
      • 1...Rxh8
        • 2.Qc6#
      • 1...Sxg4
        • 2.Bxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(g);CHECK,SBLOCK::S(E)
    • B(g);CHECK,SBLOCK::R(D)+S(C),DCHECK
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • P(l);XQ(G)
  • Actual
    • R(H);XP(l)
    • Threat
      • R(D)+S(C),DCHECK
    • Vars
      • R(n);CHECK,N_GUARD::QAB(G),XR(n)
      • B(g);CHECK,SBLOCK::S(E)
      • B(g);CHECK,SBLOCK::R(D)+S(C),DCHECK
      • B(g);CHECK,S_CUTR(n)::QAB(G)
      • B(g);CHECK,N_GUARD::QAR2(G)
      • R(n);N_GUARD,XB(J)::QAB(G)
      • S(i);N_GUARD,P_SPINS(i),XS(C)::B(I),XQ(h)
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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).