TODO

   1 Grasshopper problem: 8/8/8/8/8/8/5gPp/5K1k w 0 iiii - V. Onitiu, Die Schwalbe 1929.
   2 + Wikipedia maybe https://en.wikipedia.org/wiki/Grasshopper_(chess)
   3
   4 Shako, also known as UniEed Chess (Jean-Louis
   5 Cazaux, 1990). Board 10x10; extra pieces are
   6 Elephant (moves one or two squares
   7 diagonally, may leap intervening square) and
   8 Cannon (as above); CC on a1/j1 and a10/j10,
   9 ERNBQKBNRE on ranks 2/9, 10xP on ranks
  10 3/8. The name means chess in Esperanto.
  11 (Cazaux)
  12
  13 Shogi + Makruk/Thai chess --> see on Pychess
  14
  15 Interesting:
  16 Monochrome Chess (Proprietary game,
  17 Looney Industries; Andrew Looney, 1996).
  18 Usual men and array but pieces are all of the
  19 same colour. A man is controlled by the player
  20 in whose half of the board it stands. Thus after
  21 e4-e5, the pawn changes sides and reverses
  22 direction. When you capture (by definition, in
  23 the opponent’s half) there can be no recapture
  24 as the piece has changed sides. You may not
  25 immediately reverse an opponent’s move. The
  26 king has no royal powers but can castle. The
  27 men are allocated points and the object is to
  28 have the most points (in pieces captured) when
  29 the game ends, which is usually when the
  30 players agree or when one half of the board is
  31 empty. Values: King=10, Queen=8, Rook=5,
  32 Bishop=4, Knight=3, Pawn=1. A related game
  33 Martian Chess is described in chapter 38.
  34 (Proprietor’s rule sheet, Variant Chess 39)
  35
  36 Chakart :)
  37 https://www.chessvariants.com/crossover.dir/koopachess.html
  38
  39 Diamond Chess [Rynd] (J. A.
  40 Porterfield Rynd, 1886)  --> Berolina2 ?
  41 https://www.chessvariants.com/rules/diamond-chess
  42
  43 Bicolour Chess (Gabriel Authier, 1958). v1 et v2 : (Roméo Bédoni, 1958)
  44 Kings are subject to check and checkmate by
  45 own as well as opponent’s pieces. The Q and
  46 QN are interchanged in the array
  47 .
  48 v2: y but a player may capture his
  49 own men (TODO: only v2?)
  50
  51 Koth : king of the hill, king cannot move into check, giving check is forbidden (no checkmate).
  52
  53 Berolina Grid Chess, also known as
  54 Gridolina (originator not noted). A
  55 combination of Berolina and Grid Chess.
  56 Better than Grid Chess since Berolina pawns
  57 cross grid lines more easily. Described in
  58 World Game Review 10 as the most popular of
  59 the NOST combination games. (Nost-algia
  60 150, also Nost-algia 112 ‘not seen’)
  61 --> pourquoi pas, mais faudra pouvoir tracer des lignes sur plateau (Ball, Koth, Sittuyin, celle-là, Rococo)
  62
  63 Contact (quoted by David Silverman, 1971).
  64 White puts a knight on any square of an empty
  65 chessboard. Black moves the knight and
  66 places a marker on the square vacated. Play
  67 alternates. The knight may only be moved to
  68 vacant squares. The object is to make the last
  69 move. The game can also be played with any
  70 of the other pieces. (Your Move)
  71
  72 https://www.chessvariants.com/diffmove.dir/checkers.html --> move forward (Multhopp)
  73 in 1974 by Hans Multhopp
  74 https://www.chessvariants.com/diffmove.dir/checkers.html
  75
  76 Clockwork Orange Chess (Fergus Duniho,
  77 1999). https://www.chessvariants.com/other.dir/clockworkorange.html
  78 implem : pieces code, yellow/red, easy
  79
  80 http://abrobecker.free.fr/chess/fairyblitz.htm#football
  81 Le gagnant est le premier joueur à marquer un but, càd celui qui arrive à installer une de ses pièces dans les cages adverses: d8,e8 pour les blancs et d1,e1 pour les noirs.
  82
  83 Recycle1 et Recycle2 (--> celle-là)
  84 http://abrobecker.free.fr/chess/fairyblitz.htm#deplaceurdevivants
  85 Philippe Rouzaud, Phénix 151-152, mai 2006): Un camp peut, à la place d'un coup orthodoxe, capturer une de ses pièces et replacer la pièce capturée immédiatement sur l'échiquier. Un roi peut rester en échec durant cette action. Une pièce déplacée sur l'échiquier peut mater. Un pion ne peut pas être déplacé en première ou dernière rangée. Un roi peut déplacer et être déplacé, y compris pour se soustraire à un échec. Le roque ne peut se faire que de manière orthodoxe.
  86 Rouzaud-Banaddou: 1.Fxb2 (=f5) Dxc7 (=e6) 2.fxe6 dxe6 3.Txb1 (=b5) Dxe7 (=c7) 4.Txb2 (=a3) Dxf7 (=d6) 5.Txg1 (=g5) Dxg7 (=f6) 6.Txf1 (=f7)+ Rxf8 (=h4) 7.Fxb2 (=e8) Rxg7 (=c5) 8.Rxd1 (=f8)+ Rxh8 (=g7) 9.Dxg8+ Txg8 10.Txg8#
  87
  88 http://abrobecker.free.fr/chess/fairyblitz.htm#madrasi
  89 Madrasi Chess, Abdul J. Karwathar, 1979): Deux pièces de même nature (excepté les rois) qui s'observent, se paralysent mutuellement en perdant tout pouvoir (déplacement, prise, donner échec ou mat) sauf celui de paralyser une autre pièce.
  90 1.e4 e5 2.Cf3 Cc6 3.Fc4 Fc5 4.Cxe5 d6 5.d4 (5.Fxf7+ Rxf7 est légal; ou 5.Dh5 Fe6 immobilisant le Fc4) 5...Fxd4 6.Dxd4 dxe5 et la Dame blanche est perdue.