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Grande Acedrex. A large variant from 13th century Europe. (12x12, Cells: 144) [All Comments] [Add Comment or Rating]
H. G. Muller wrote on Mon, Sep 26, 2016 09:31 AM UTC:

Because the true rules differ so much from what is described above, I figured the article deserves to have an extra diagram with piece moves:

files=12 ranks=12 startShade=#FFCC00 lightShade=#FFFFCC borders=0 useMarkers=2 maxPromote=0 promoChoice=CRLUGA graphicsDir=http://hgm.nubati.net/variants/utrecht/ squareSize=35 whitePrefix=w blackPrefix=b graphicsType=png symmetry=none pawn::fmWfcF::a4,b4,c4,d4,e4,f4,g4,h4,i4,j4,k4,l4,,a9,b9,c9,d9,e9,f9,g9,h9,i9,j9,k9,l9 giraffe::Z::d1,i1,,d12,i12 crocodile::B::e1,h1,,e12,h12 lion::HC::b1,k1,,b12,k12 rook::::a1,l1,,a12,l12 unicorn::ypafsW::c1,j1,,c12,j12 griffon::FyafsF:griffon:g1,,g12 king::KiAiD::f1,,f12

Click on names below to see how the piece moves.

  • Pawn
  • Giraffe
  • Crocodile
  • Lion
  • Rook
  • Unicorn (Rhino)
  • Griffon
  • King (dark yellow = initial move only)

[Edit] Because this variant lacks promotion choice, but makes the promotion piece dependent on location, the standard promotion procedure was suppressed by defining maxPromote=0 (i.e. no promoting pieces). A JavaScript function WeirdPromotion was then defined in the HTML, in addition to the diagram description. The diagram standard script calls this function when present, to tell it what piece type to put on the to-square.

The provided function tests if the moved piece was a Pawn that reached last rank. If so, it specifies a piece type dependent on the promotion file.