| 1 | p.boxed |
| 2 | | Move twice at every turn. |
| 3 | |
| 4 | h3 Specifications |
| 5 | |
| 6 | ul |
| 7 | li Chessboard: standard. |
| 8 | li Material: standard. |
| 9 | li Non-capturing moves: standard. |
| 10 | li Special moves: standard. |
| 11 | li Captures: standard. |
| 12 | li End of game: standard. |
| 13 | |
| 14 | p. |
| 15 | The only difference with orthodox chess is the double-move rule, |
| 16 | but this affects the game a lot. |
| 17 | |
| 18 | h3 Basics |
| 19 | |
| 20 | p. |
| 21 | TODO: explain, every turn twice except if check on 1st turn, or |
| 22 | very first move in game. |
| 23 | En-passant: possible in any order if 2 ep squares, |
| 24 | otherwise has to be the first move. |
| 25 | OK even if opponent moved his pawn at subturn 1. |
| 26 | |
| 27 | p. |
| 28 | PGN game notation: since there are two moves at each turn except on move 1, |
| 29 | a double move in the game is indicated as two comma-separated (ordered) moves, |
| 30 | as in 3.Na5,Bd3 e6,f4 (the two first are white moves, |
| 31 | the two others are black moves). |
| 32 | Sometimes a move gives check, or stalemate occurs after subTurn 1 :: just one move |
| 33 | |
| 34 | figure.diagram-container |
| 35 | .diagram |
| 36 | | fen:r1bqkbnr/pppp1p1p/2n5/4p2p/4P3/5N2/PPPP1PPP/RNB1KB1R: |
| 37 | figcaption After the moves 1.e4 e5,Nc6 2.Qh5,Nf3 g6,gxh5 |
| 38 | |
| 39 | h3 More information |
| 40 | |
| 41 | p |
| 42 | | See for example the |
| 43 | a(href="https://www.chessvariants.com/multimove.dir/marseill.html") |
| 44 | | Marseillais Chess |
| 45 | | page on chessvariants.com. |