MESON Chess Problem Database

Problem Display
PID: 12161 (1rbN4/bp6/r4p1K/p4k2/2N1p1p1/3p2B1/Qn6/8 w - - 0 1)

Hoffmann, Fritz

Sp. HM., Rokada TT, 1975-1977

1rbN4/bp6/r4p1K/p4k2/2N1p1p1/3p2B1/Qn6/8

#2

5 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Se3#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Be3+
      • 2.Sxe3#
    • 1...Bb6
      • 2.Sd6#
    • 1...b6
      • 2.Se3#
      • 2.Sd6#
  • Tries
    • 1.Qxa5+?
      • 1...Rxa5
        • 2.Sd6#
      • 1...Bc5
        • 2.Se3#
        • 2.Qxc5#
      • 1...b5!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qd5#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sc4
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(g);S_CUTB(i)::S(C)
    • R(g);N_GUARD::S(C),XR(g)
    • B(i);CHECK,N_GUARD::S(C),XB(i)
    • B(i);S_CUTR(g)::S(C)
  • Tries
    • Try
      • Q(A);CHECK,XP(e)
      • Vars
        • R(g);XQ(A)::S(C)
      • Refutation
        • P(j);P_SPINP(j)
  • Actual
    • S(C);
    • Threat
      • QAR2(A)
    • Vars
      • B(l);N_GUARD::QAB1(A),XB(l)
      • S(a);OGATE::QAR(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).