(game "Roll-Ing to Four"
    ("TwoPlayersNorthSouth")
    (equipment {
        (board (rectangle 10 4) use:Vertex)
        (piece "Ball" Each ("StepToEmpty" (directions Forwards of:All)))
    })
    (rules
        (start {
            (place "Ball1" (sites {"A1" "B1" "C1" "B6" "C6" "D6"}))
            (place "Ball2" (sites {"A5" "B5" "C5" "B10" "C10" "D10"}))
        })
        (play (forEach Piece))
        (end (if (is Line 4 All) (result Mover Win))) 
    )
)

//------------------------------------------------------------------------------

(metadata 
    
    (info
        {
        (description "This game is played on the following 10x4 square board.")
        (rules "TURNS - At each turn, each player must move one of his stones
            - A stone moves (orthogonal and diagonal) forward to an empty cell.
        GOAL - A player wins by making a (orthogonal or diagonal) 4 in-a-row.")
        (id "1820")
        (source "<a href=\"http://www.di.fc.ul.pt/~jpn/gv/rolling.htm\" target=\"_blank\" class=\"style1\" style=\"color: #0000EE\" />www.di.fc.ul.pt</a>")
        (version "1.3.12")
        (classification "board/space/line")
        (author "Ingo Althofer and Thomas Rolle")
        (credit "Eric Piette")
        (date "2003")
        }
    )
    
    (graphics {
        (player Colour P1 (colour Red))
        (player Colour P2 (colour Blue))
        (show Edges Diagonal (colour Hidden))
        (board Background image:"square.svg" fillColour:(colour 223 178 110) edgeColour:(colour 223 178 110) scaleX:0.5 scaleY:1.25)
        (board Colour OuterEdges (colour Black))
        (board Colour InnerEdges (colour Black))
        (board Colour OuterVertices (colour Hidden))
        (board Colour InnerVertices (colour Hidden))
        (show Symbol "disc" (sites Corners) fillColour:(colour Black) edgeColour:(colour Black) scale:0.3)
    })
    
    (ai
        "Roll-Ing to Four_ai"
    )
)