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The 36 outer squares of the 10 x 10 Rococo board are marked in the diagram below. These marked squares on the edge of the board are edge squares, and a move may only pass over or end on an edge square if it is necessary for a capture. (Or in other words, a piece may only end up on an edge square by making a capturing move that would not be possible without landing on the edge square.) This includes moves that start on edge squares. Also, only the minimal number of edge squares may be passed over in order for the capture to occur, thus:
A Long Leaper on x00 could capture an opposing piece on x3 by landing on x2 (assuming x8-x4 were empty), but may not capture an opposing piece on x3 by landing on x1 or x0.(This is a clarification of the original rules which failed unambiguously to define the appropriate behavior in this case.) Moves that captures of multiple opposing pieces are not forbidden by edge squares -- the piece may move over as many edge squares as required for the capture. While a capture must be performed crossing as few as possible edge squares, when there is a choice among multiple possible captures, there is no requirement to choose the capture that crosses the fewest possible edge squares. The Swapper's swap move is considered a capture for purposes of edge squares.
To describe the rules for edge squares formally:
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+---+---+---+---+---+---+---+---+---+---+
00 | * | * | * | * | * | * | * | * | * | * |
+---+---+---+---+---+---+---+---+---+---+
8 | * | I |:W:| L |:K:| C |:L:| A |:S:| * |
+---+---+---+---+---+---+---+---+---+---+
7 | * |:P:| P |:P:| P |:P:| P |:P:| P | * |
+---+---+---+---+---+---+---+---+---+---+
6 | * | |:::| |:::| |:::| |:::| * |
+---+---+---+---+---+---+---+---+---+---+
5 | * |:::| |:::| |:::| |:::| | * |
+---+---+---+---+---+---+---+---+---+---+
4 | * | |:::| |:::| |:::| |:::| * |
+---+---+---+---+---+---+---+---+---+---+
3 | * |:::| |:::| |:::| |:::| | * |
+---+---+---+---+---+---+---+---+---+---+
2 | * | p |:p:| p |:p:| p |:p:| p |:p:| * |
+---+---+---+---+---+---+---+---+---+---+
1 | * |:i:| w |:l:| k |:c:| l |:a:| s | * |
+---+---+---+---+---+---+---+---+---+---+
0 | * | * | * | * | * | * | * | * | * | * |
+---+---+---+---+---+---+---+---+---+---+
x a b c d e f g h y |
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| Piece | Description |
 King |
The King moves and captures as an Orthodox Chess King. Since victory is by capture of the opposing King, a Rococo King may move next to an enemy King. A King may only enter an edge square to capture a piece on an edge square. |
 Advancer |
The Advancer moves
passively as an Orthodox Queen. In order to capture, the Advancer must
move to a square adjacent to an enemy piece. If the next square in the
direction it moved from the square the Advancer stopped on is occupied by
an opposing piece, that opposing piece is captured. (This is capture by
approach.) These captures are part of movement, and are not
optional -- you can not move a Advancer next to an opposing piece in
the line of movement and not capture it. An Advancer never
moves into an occupied square. An Advancer may only
enter an edge square if swapped there, but once on an edge square it may
make capturing moves along the edge.
+---+---+---+---+---+---+---+ |:::| p |:::| |:::| |:::| +---+---+---+---+---+---+---+ | |:*:| |:::| |:p:| | +---+---+---+---+---+---+---+ |:::| + |:::| |:*:| |:::| +---+---+---+---+---+---+---+ | |:+:| |:+:| |:::| | +---+---+---+---+---+---+---+ |:+:| + |:+:| |:::| |:::| +---+---+---+---+---+---+---+ | + |:A:| + |:+:| * |:p:| | +---+---+---+---+---+---+---+ |:+:| + |:+:| |:::| |:::| +---+---+---+---+---+---+---+The '+'s indicate where the white Advancer can move without capturing, and the '*'s indicates where it may move to to capture one of the black Pawns. |
 Long Leaper |
The Long Leaper
moves as an Orthodox Queen and captures by overtaking. It
takes possession of a single intervening
piece by leaping to a vacant square somewhere beyond it. It may
capture additional pieces, along the same line, if a vacant 'landing
square' lies somewhere beyond each enemy piece. A Long Leaper may
never jump over a friendly piece, jump over two or more pieces in a row
without any empty spaces between, or move
to an occupied square. It may end its move on an edge square only when
that is the only way to make a particular capture.
+---+---+---+---+---+---+---+---+ |:*:| |:::| |:::| |:::| * | +---+---+---+---+---+---+---+---+ | * |:::| |:::| |:::| * |:::| +---+---+---+---+---+---+---+---+ |:*:| |:::| |:::| p |:::| | +---+---+---+---+---+---+---+---+ | * |:::| |:::| + |:::| |:::| +---+---+---+---+---+---+---+---+ |:*:| |:::| + |:::| |:::| | +---+---+---+---+---+---+---+---+ | p |:::| + |:::| |:::| |:::| +---+---+---+---+---+---+---+---+ |:+:| + |:::| |:::| |:::| | +---+---+---+---+---+---+---+---+ | L |:+:| + |:+:| + |:+:| p |:*:| +---+---+---+---+---+---+---+---+The '*'s indicate squares the could be landed in after leaping over and capturing an opposing piece, the '+'s indicate squares that can be moved to without capturing. |
 Swapper |
The Swapper moves as an Orthodox Queen without capturing, or may
swap position with any piece (of either side) an unobstructed
Queen's move away. A Swapper's swap move counts as a capture for the
purpose of the edge squares, so a Swapper may swap position with a
piece on an edge square. Additionally, a Swapper may capture an
adjacent piece and itself at the same time by mutual
destruction. Mutual destruction may not be used when immobilized.
If a Swapper swaps with an opposing Swapper or Chameleon, on the following
turn the two pieces may not swap back. They may swap again once any
other move is made.
The Swapper (without the capture by mutual destruction) was called the Ximaera and the Chimaerine by V.R. Parton. |
 Withdrawer |
The Withdrawer moves
passively as an Orthodox Queen. In order to capture, the
Withdrawer must occupy a square adjacent to an enemy piece. To
complete the capture, it must move one-or-more squares directly away
from the enemy piece. For example, a Withdrawer moving from d2 to g2
captures only an enemy piece at c2 (not c3/d3/e3/c1/d1/e1). These
captures are part of movement, and are not optional -- you can not
move a Withdrawer directly away from an opposing piece and
not capture it. A Withdrawer may never move to an occupied
square. It may move to an edge square when it is the only way to make
a particular capture.
+---+---+---+---+---+---+---+---+ |:::| |:::| * |:::| |:::| + | +---+---+---+---+---+---+---+---+ | |:::| |:*:| |:::| + |:::| +---+---+---+---+---+---+---+---+ |:::| |:::| * |:::| + |:::| | +---+---+---+---+---+---+---+---+ | |:::| p |:*:| + |:::| |:::| +---+---+---+---+---+---+---+---+ |:+:| + |:+:| W |:+:| + |:+:| + | +---+---+---+---+---+---+---+---+ | |:::| + |:p:| * |:::| |:::| +---+---+---+---+---+---+---+---+ |:::| + |:::| |:::| * |:::| | +---+---+---+---+---+---+---+---+ | + |:::| |:::| |:::| * |:::| +---+---+---+---+---+---+---+---+The '*'s indicate squares the could be landed in after moving away from and capturing an opposing piece, the '+'s indicate squares that can be moved to without capturing. |
 Immobilizer |
The Immobilizer moves as an Orthodox Queen but does not capture. An enemy piece standing adjacent to an Immobilizer may not move while the Immobilizer is present. Black and white Immobilizers, occupying adjacent squares, are each frozen until the other is captured. An immobilized piece other than a King may 'commit suicide' by removing itself from the board (usually to open a line of attack). This counts as a move for the player removing the piece. The Immobilizer may never move to an occupied square or an edge square (although it may be swapped to an edge square). |
 Chameleon |
The Chameleon moves
passively as an Orthodox Queen. To capture, it mimics the powers of
its intended victim. For example, it leaps over a mount to capture a
Pawn, withdraws from Withdrawers, approaches Advancers, leaps over
Long Leapers, and swaps with Swappers. By the same token, an enemy
King standing adjacent to a Chameleon can be captured by the
Chameleon. Chameleons can freeze Immobilizers but cannot capture them
(but when next to an Immobilizer do not freeze any other pieces). A
Chameleon next to a Swapper may capture it (and itself) by mutual
destruction.
A Chameleon can use multiple types of capture in the same move. Consider a white Withdrawer on a1, a black Chameleon on a2, a white Long Leaper on a3 and a white Advancer on a5. The Black Chameleon by leaping over the Long Leaper to a4 would also capture the white Withdrawer by moving away from it, and the white Advancer by approaching it (for purposes of approaching and withdrawing it doesn't matter if the move is a slide or a leap). Swaps with Swappers may be combined with other captures. |
 Cannon Pawn |
The Pawns in Rococo are Cannon Pawns, since their move is rather like
a limited form of the Cannon from XiangQi (although, their move
is even more like the fairy Chess piece called the Grasshopper). Cannon
Pawns move without capturing two ways: either a single step in any
direction, or, they may leap over an adjacent piece of either side to
the empty square just beyond. They capture the in the second way they
move, by leaping over an adjacent piece (the mount), landing on the
opposing piece just beyond the mount. A Cannon Pawn may only move to
an edge square when capturing a piece on an edge square.
+---+---+---+---+---+---+---+---+ |:::| |:::| |:::| |:::| | +---+---+---+---+---+---+---+---+ | |:::| |:::| |:::| |:::| +---+---+---+---+---+---+---+---+ |:::| |:::| |:::| |:::| | +---+---+---+---+---+---+---+---+ | |:::| |[p]| |:*:| |:::| +---+---+---+---+---+---+---+---+ |:::| |:+:| A |:p:| |:::| | +---+---+---+---+---+---+---+---+ | |:::| + |:P:| + |:::| |:::| +---+---+---+---+---+---+---+---+ |:::| |:+:| + |:+:| |:::| | +---+---+---+---+---+---+---+---+ | |:::| |:::| |:::| |:::| +---+---+---+---+---+---+---+---+The '*'s indicate squares the could be landed on by leaping over another piece. The '+'s indicate squares that can be moved to without jumping. The Pawn surrounded by '[]'s can be captured by leaping over the Advancer (the mount in that case). If a Cannon Pawn makes a move by itself (rather than being swapped) that lands it on a square on the rank where the opposing King started, or on the edge rank past it, it may promote to any friendly piece other than a Cannon Pawn that has been captured and is currently off of the board. |
The other changes, such as the change in the array, victory by capture and Pawn promotion were the results of play-testing and experimentation.
In Ultima, no two pieces use the same form of capture. Purists might complain that Rococo breaks that rule, since both the King and the Cannon Pawns capture by replacement. Our view is that doesn't make it the same type of capture, since by that reasoning, capture by approach, withdrawal and overtaking are all forms of capture by relative movement. Direct replacement and leaping replacement are at least as different as those three forms of capture are from each other.
Is Rococo the "fixed" version of Ultima? Probably not. Instead, Rococo is a game in the Ultima family, with its own strengths and weaknesses. It is a very aggressive game, reminiscent of XiangQi in that position is often more important than material. It seems to be a game with a fair degree of clarity too.
| Piece | Description |
 Pushme-Pullyu |
The Pushme-Pullyu moves like a Queen, but never to an occupied square. If it moves directly away from an adjacent opposing piece, it will capture it like a Withdrawer. If it moves directly next to an opposing piece in its direction of movement, it will capture it like an Advancer. It may combine both types of capture in a single move. These captures are part of movement, and are not optional -- you can not move a Pushme-Pullyu directly away from an opposing piece and not capture it. Pushme-Pullyu's can enter edge squares when required to in order to capture by withdrawal. When on an edge square it may move to another edge square in order to capture by approach or withdrawal. |
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Created on: May 20, 2002. Last modified on: November 15, 2005.
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