p.boxed
| Similar to Checkers, with prisoners stacked below capturers.
+figure.diagram-container
+ img.img-center(src="/variants/Emergo/match_2004_U-con.jpg")
+ figcaption.text-center.
+ Game played on an orthogonal depiction of a standard 9x9 Emergo board.
+
+p
+ | Nothing disappears in this game: captured pieces become part of the
+ | capturing unit. Therefore, a piece or unit will always be understood
+ | as a combination of W white (elementary) pieces and B (elementary) black
+ | ones, with
+ br
+ | W >= 0, B >= 0 and W + B >= 1.
+
p
| The 9x9 board is initially empty.
| Each player receives 12 stackable pieces, "in hand".
- | At each turn, a player must either
+ | At each turn, a player must pick an action among the followings:
ul
- li.
- Enter a new piece on the board such that the opponent cannot capture it.
- However, if a capture is already possible before the move, then
- the piece can be dropped anywhere.
- White cannot place a piece in the center at move 1.
- li Play a move on the board, along diagonals.
+ li Enter a new piece (W + B = 1) on the board.
+ li Move a unit along diagonals, by one square.
+ li Capture something.
+
+h3 Entering moves
+
+p.
+ Introducing a piece such that the opponent can take it on next turn is
+ forbidden, unless another capture is already available.
+
+p At first move, white cannot place a piece at the central point.
+
+p.
+ If the opponent already placed all his pieces in hand, then a
+ "shadow piece" enters, formed by all the remaining units available
+ (thus in this case W + B > 1).
+
+h3 Captures
p.
- Simple moves are Ferz moves: one step diagonally.
Captures work exactly as in Checkers: by jumping over a diagonally adjacent
piece to land on a free square just behind.
- However, the resulting situation is more complex. See below.
If a capture is possible, then it must be played; in this case no piece can
be introduced on the board.
+ If after a capture another is possible with the same piece, it must also be
+ played — except if that implies turning at 180 degrees.
-p TODO: diagram
+figure.diagram-container
+ .diagram.diag12
+ | fen:9/9/2a@1a@4/9/4a@4/3D@5/9/5A@3/6b@2 e3:
+ .diagram.diag22
+ | fen:9/9/2a@1a@4/9/4a@4/3D@5/4ba4/9/9:
+ figcaption.
+ Before and after black captures, jumping at the marked location.
+ The next white piece must be captured too.
p.
- Let us consider each unit as a compound entity containing W white pieces
- and B black ones (initially W = 1 and B = 0 for white units,
- and vice-versa for black).
- Captures can then be described formally as follows.
-
-p.
- As white:
- If W1/B1 jumps over W2/B2 at square S2 to land on S1', then
- W1/(B1+1) arrives on S1' and W2/(B2-1) remains on S2.
+ Captures can be described formally as follows.
+ If, as white, W1/B1 jumps over W2/B2 at square S2 to land on S1', then
+ W1/(B1+1) arrives on S1' while W2/(B2-1) stays on S2.
If W2 = B2 - 1 = 0, nothing remains at the captured unit location.
- As black: exchange W and B above.
+ As black: exchange W and B.
p.
In other words, each unit is a stack of friendly and enemy pieces, with
friendly pieces on top. After each capture, the prisoners part of the
- stack is incremented, while the "jailers" counterpart at the captured
+ stack is incremented, while the jailers quantity at the captured
location decreases by one.
p.
When several capturing chains are available,
- the player has to select one of the longest (as in Checkers).
+ the player must select one of the longest (as in Checkers):
+
+figure.diagram-container
+ .diagram
+ | fen:9/9/2a@1a@4/9/2bb1a@4/3C@5/9/9/9:
+ figcaption.
+ From https://www.mindsports.nl/:
+ White's only option is to capture clockwise.
-p TODO: diagram (from mindsports.nl)
+p.
+ A piece can be jumped over several times, as long as it contains
+ at least one enemy unit (controling it).
h3 More information
p
- | See the
+ | You are invited to visit the
a(href="https://www.mindsports.nl/index.php/arena/emergo/88-rules")
- | Emergo page
- | on the author's website.
- | Rules are also described on
+ | authors' website
+ | . The rules are also described on
a(href="http://www.iggamecenter.com/info/en/emergo.html") iggamecenter
- | , where you can also play this game.
+ | , where you can play Emergo.
p Inventors: Christian Freeling and Ed van Zon (1986)
projects / vchess.git / blobdiff