| 1 | p.boxed |
| 2 | | Similar to Checkers, with prisoners stacked below capturers. |
| 3 | |
| 4 | figure.diagram-container |
| 5 | img.img-center(src="/variants/Emergo/match_2004_U-con.jpg") |
| 6 | figcaption.text-center. |
| 7 | Game played on an orthogonal depiction of a standard 9x9 Emergo board. |
| 8 | |
| 9 | p |
| 10 | | Nothing disappears in this game: captured pieces become part of the |
| 11 | | capturing unit. Therefore, a piece or unit will always be understood |
| 12 | | as a combination of W white (elementary) pieces and B (elementary) black |
| 13 | | ones, with |
| 14 | br |
| 15 | | W >= 0, B >= 0 and W + B >= 1. |
| 16 | |
| 17 | p |
| 18 | | The 9x9 board is initially empty. |
| 19 | | Each player receives 12 stackable pieces, "in hand". |
| 20 | | At each turn, a player must pick an action among the followings: |
| 21 | ul |
| 22 | li Enter a new piece (W + B = 1) on the board. |
| 23 | li Move a unit along diagonals, by one square. |
| 24 | li Capture something. |
| 25 | |
| 26 | h3 Entering moves |
| 27 | |
| 28 | p. |
| 29 | Introducing a piece such that the opponent can take it on next turn is |
| 30 | forbidden, unless another capture is already available. |
| 31 | |
| 32 | p At first move, white cannot place a piece at the central point. |
| 33 | |
| 34 | p. |
| 35 | If the opponent already placed all his pieces in hand, then a |
| 36 | "shadow piece" enters, formed by all the remaining units available |
| 37 | (thus in this case W + B > 1). |
| 38 | |
| 39 | p. |
| 40 | While you have pieces in hand, none of your pieces can move on the board |
| 41 | unless they capture something. |
| 42 | |
| 43 | h3 Captures |
| 44 | |
| 45 | p. |
| 46 | Captures work exactly as in Checkers: by jumping over a diagonally adjacent |
| 47 | piece to land on a free square just behind. |
| 48 | If a capture is possible, then it must be played; in this case no piece can |
| 49 | be introduced on the board. |
| 50 | If after a capture another is possible with the same piece, it must also be |
| 51 | played — except if that implies turning at 180 degrees. |
| 52 | |
| 53 | figure.diagram-container |
| 54 | .diagram.diag12 |
| 55 | | fen:9/9/2a@1a@4/9/4a@4/3D@5/9/5A@3/6b@2 e3: |
| 56 | .diagram.diag22 |
| 57 | | fen:9/9/2a@1a@4/9/4a@4/3D@5/4ba4/9/9: |
| 58 | figcaption. |
| 59 | Before and after black captures, jumping at the marked location. |
| 60 | The next white piece must be captured too. |
| 61 | |
| 62 | p. |
| 63 | Captures can be described formally as follows. |
| 64 | If, as white, W1/B1 jumps over W2/B2 at square S2 to land on S1', then |
| 65 | W1/(B1+1) arrives on S1' while W2/(B2-1) stays on S2. |
| 66 | If W2 = B2 - 1 = 0, nothing remains at the captured unit location. |
| 67 | As black: exchange W and B. |
| 68 | |
| 69 | p. |
| 70 | In other words, each unit is a stack of friendly and enemy pieces, with |
| 71 | friendly pieces on top. After each capture, the prisoners part of the |
| 72 | stack is incremented, while the jailers quantity at the captured |
| 73 | location decreases by one. |
| 74 | |
| 75 | p. |
| 76 | When several capturing chains are available, |
| 77 | the player must select one of the longest (as in Checkers): |
| 78 | |
| 79 | figure.diagram-container |
| 80 | .diagram |
| 81 | | fen:9/9/2a@1a@4/9/2bb1a@4/3C@5/9/9/9: |
| 82 | figcaption. |
| 83 | From https://www.mindsports.nl/: |
| 84 | White's only option is to capture clockwise. |
| 85 | |
| 86 | p. |
| 87 | A piece can be jumped over several times, as long as it contains |
| 88 | at least one enemy unit (controling it). |
| 89 | |
| 90 | h3 More information |
| 91 | |
| 92 | p |
| 93 | | You are invited to visit the |
| 94 | a(href="https://www.mindsports.nl/index.php/arena/emergo/88-rules") |
| 95 | | authors' website |
| 96 | | . The rules are also described on |
| 97 | a(href="http://www.iggamecenter.com/info/en/emergo.html") iggamecenter |
| 98 | | , where you can play Emergo. |
| 99 | |
| 100 | p Inventors: Christian Freeling and Ed van Zon (1986) |