MESON Chess Problem Database

Problem Display
PID: 88830 (1nbb1NQq/1p2p1Pp/2k4P/1pP5/8/1P1NpP1B/3RK2B/n7 w - - 0 1)

Maleika, Gerhard

The Problemist, 1990

1nbb1NQq/1p2p1Pp/2k4P/1pP5/8/1P1NpP1B/3RK2B/n7

#2

12 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Qxe6#
    • 1...Sd7
      • 2.Qe6#
  • Tries
    • 1.Bd7+?
      • 1...Sxd7
        • 2.Qe6#
      • 1...Bxd7!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sb4#
        • 2.Se5#
        • 2.Sd4#
        • 2.Sxd8#
      • 1...Kd5
        • 2.Sb4#
      • 1...Kd7
        • 2.Se5#
      • 1...Qxg7
        • 2.Sb4#
        • 2.Sxd8#
      • 1...Qxg8
        • 2.Sb4#
        • 2.Se5#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...Sxb3
        • 2.Sb4#
        • 2.Se5#
        • 2.Sxd8#
      • 1...exd2
        • 2.Sd4#
        • 2.Sxd8#
      • 1...b4
        • 2.Sd4#
      • 1...b6
        • 2.Sxd8#
      • 1...Ba5
        • 2.Se5#
        • 2.Sd4#
      • 1...Bb6
        • 2.Sb4#
        • 2.Se5#
        • 2.Sd4#
      • 1...Bc7
        • 2.Sb4#
        • 2.Sd4#
      • 1...Sc2
        • 2.Se5#
        • 2.Sxd8#
      • 1...Sa6
        • 2.Se5#
        • 2.Sd4#
        • 2.Sxd8#
      • 1...Sd7
        • 2.Sb4#
        • 2.Sd4#
        • 2.Sxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(i);N_GUARD::QAR2(L),XB(i)
    • S(h);S_CUTB(i)::QAR2(L)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • S(h);XB(G)::QAR2(L)
      • Refutation
        • B(i);XB(G)
  • Actual
    • S(K);
    • Threat
      • DUALS(4)
    • Vars
      • K(d);S_FLIGHT::R(A)+S(E),DCHECK
      • B(i);OGATE,XS(K)::QAR2(L),XB(i)
      • P(c);::S(K)
      • P(e);::S(K),XB(j)
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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).