Help For Crossway
Welcome to the network Crossway server. The rules
of Crossway are below. The Crossway "challenge" command
is described here. Other commands are the same for all pbmserv
Current games can be viewed here.
- crossway challenge [ -small | -medium | -large | -size=N ] userid1 userid2
- Start a new game between userid1 and userid2
-small allows players to play the smaller 9x9 board.
-medium allows players to play a 13x13 board.
-large allows players to play the default 19x19 board.
-size=N allows players to play a NxN board.
Crossway Rules (Copyright (c) 2007 Mark
AUTHOR'S NOTE: Feel free to distribute this document.
Crossway is a played with a Go set. The board starts out
empty. Each player takes possession of all of the stones of
one color. Draws and ties cannot occur in Crossway.
Players take turns adding their stones to the board, one stone per turn.
A player must never complete a checkerboard formation as shown in Figure
1. Figure 2 shows all available placements for Black (V), marked with
'?'s. Black makes the first placement of the game. Each player will
always have a placement available and must make a placement on his turn.
Crossway makes use of the pie rule. See the PIE RULE section below.
. . . . . . . .
. H V . . V H .
. V H . . H V .
. . . . . . . .
Figure 1 -- forbidden patterns (checkerboards)
? H V V V
H . H ? H
V V V . H
V H ? H V
H . V . H
Figure 2 -- legal placements for Black (H)
(marked with ?)
OBJECT OF THE GAME
For White (H) to win, White must form a contiguous sequence of white stones
connecting the West edge to the East edge of the board. Each stone in
the sequence must be connected to neighboring stones in the sequence via
horizontal, vertical, or diagonal adjacencies. Likewise for Black (V) and
the North and South edges. A corner is considered to be part of both
adjoining edges. In Figure 3, White has won the game.
. . . . H
V . . H V
V H H V .
H . V . .
. . . . .
Figure 3 -- White (H) has won
As noted earlier, Black (V) makes the first placement. On White's first
turn, White has the option of swapping sides (becoming the black player).
Or White can simply add a white stone to an unoccupied point. In either
case, after White's placement players take turns adding their own stones
to the board, one stone per turn, starting with Black.