| 1 | p.boxed |
| 2 | | Similar to Checkers, with prisoners stacked below capturers. |
| 3 | |
| 4 | p |
| 5 | | The 9x9 board is initially empty. |
| 6 | | Each player receives 12 stackable pieces, "in hand". |
| 7 | | At each turn, a player must either |
| 8 | ul |
| 9 | li. |
| 10 | Enter a new piece on the board such that the opponent cannot capture it. |
| 11 | However, if a capture is already possible before the move, then |
| 12 | the piece can be dropped anywhere. |
| 13 | White cannot place a piece in the center at move 1. |
| 14 | li Play a move on the board, along diagonals. |
| 15 | |
| 16 | p. |
| 17 | Simple moves are Ferz moves: one step diagonally. |
| 18 | Captures work exactly as in Checkers: by jumping over a diagonally adjacent |
| 19 | piece to land on a free square just behind. |
| 20 | However, the resulting situation is more complex. See below. |
| 21 | If a capture is possible, then it must be played; in this case no piece can |
| 22 | be introduced on the board. |
| 23 | |
| 24 | p TODO: diagram |
| 25 | |
| 26 | p. |
| 27 | Let us consider each unit as a compound entity containing W white pieces |
| 28 | and B black ones (initially W = 1 and B = 0 for white units, |
| 29 | and vice-versa for black). |
| 30 | Captures can then be described formally as follows. |
| 31 | |
| 32 | p. |
| 33 | As white: |
| 34 | If W1/B1 jumps over W2/B2 at square S2 to land on S1', then |
| 35 | W1/(B1+1) arrives on S1' and W2/(B2-1) remains on S2. |
| 36 | If W2 = B2 - 1 = 0, nothing remains at the captured unit location. |
| 37 | As black: exchange W and B above. |
| 38 | |
| 39 | p. |
| 40 | In other words, each unit is a stack of friendly and enemy pieces, with |
| 41 | friendly pieces on top. After each capture, the prisoners part of the |
| 42 | stack is incremented, while the "jailers" counterpart at the captured |
| 43 | location decreases by one. |
| 44 | |
| 45 | p. |
| 46 | When several capturing chains are available, |
| 47 | the player has to select one of the longest (as in Checkers). |
| 48 | |
| 49 | p TODO: diagram (from mindsports.nl) |
| 50 | |
| 51 | h3 More information |
| 52 | |
| 53 | p |
| 54 | | See the |
| 55 | a(href="https://www.mindsports.nl/index.php/arena/emergo/88-rules") |
| 56 | | Emergo page |
| 57 | | on the author's website. |
| 58 | | Rules are also described on |
| 59 | a(href="http://www.iggamecenter.com/info/en/emergo.html") iggamecenter |
| 60 | | , where you can also play this game. |
| 61 | |
| 62 | p Inventors: Christian Freeling and Ed van Zon (1986) |