(game "Spava" 
    (players <Version:numPlayers>) 
    (equipment { 
        (board (square <Board> pyramidal:True) use:Vertex) 
        (piece "Ball" Each) 
    }) 
    (rules 
        (play 
            (move Add 
                (to (sites Empty) 
                    if:(is Flat)
                )
            )
        )
        (end {
            (if 
                (is Line (- (count Rows) (layer of:(last To))) SameLayer) 
                (result Mover Win)
            )
            (if 
                (is Line (- (- (count Rows) (layer of:(last To))) 1) SameLayer) 
                (result Mover Loss)
            )
        })
    )
)

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

(option "Players" <Version> args:{<numPlayers> <playRules>}
    {
    (item "2 Players" <2> <(meta (swap)) (play (move Add (to (sites Empty))))> "Two players.")**
    (item "3 Players" <3> <(play (priority {(move Add (to (union (sites Winning Mover (add (to (sites Empty) if:(is Flat)))) (sites Winning Next (add (to (sites Empty) if:(is Flat))))))) (move Add (to (sites Empty) if:(is Flat))) }))> "Three players.")
    (item "4 Players" <4> <(play (priority {(move Add (to (union (sites Winning Mover (add (to (sites Empty) if:(is Flat)))) (sites Winning Next (add (to (sites Empty) if:(is Flat))))))) (move Add (to (sites Empty) if:(is Flat))) }))> "Four players.")
    }
)

(option "Board Size" <Board> args:{ <size> }
    {
    (item "2x2" <2> "2x2 square pyramidal board.") 
    (item "3x3" <3> "3x3 square pyramidal board.") 
    (item "4x4" <4> "4x4 square pyramidal board.")* 
    (item "5x5" <5> "5x5 square pyramidal board.") 
    (item "6x6" <6> "6x6 square pyramidal board.") 
    (item "7x7" <7> "7x7 square pyramidal board.") 
    (item "8x8" <8> "8x8 square pyramidal board.") 
    (item "9x9" <9> "9x9 square pyramidal board.") 
})

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

(metadata 
    
    (info
        {
        (description "Spava is based on Yavalath but adapted to the Shibumi set.")
        (rules "Starting with white, each player places a marble on an empty space or platform (2x2 arrangement of marbles). A player wins by making a line of L pieces of their colour orthogonally or diagonally (where L is the layer size) but loses by making a line of L-1 of their colour beforehand (without also making a line of L).")
        (id "1655")
        (source "<a href=\"https://boardgamegeek.com/boardgame/119107/spava\" target=\"_blank\" class=\"style1\" style=\"color: #0000EE\" />BGG</a>")
        (version "1.3.13")
        (classification "board/space/line")
        (author "Cameron Browne")
        (publisher "<a href=\"https://www.nestorgames.com\" target=\"_blank\" class=\"style1\" style=\"color: #0000EE\" />nestorgames</a> (used with permission)")
        (credit "Cameron Browne")
        (date "2012")
        }
    )
    
    (graphics {
        (piece Scale "Ball" 1.0)
        (board Style Shibumi)
    }) 
    (ai
        "Spava_ai"
    )
)