has_variation ( move : Union ) → bool ¶Ĭhecks if this node has the given variation. Gets a child node by either the move or the variation index. The root node is also in the main variation. is_main_variation ( ) → bool ¶Ĭhecks if this node is the first variation from the point of view of its is_mainline ( ) → bool ¶Ĭhecks if the node is in the mainline of the game. Nf3, the node holdingġ… c5 starts a variation. The root node does not start a variation and can have noįor example, in 1. starts_variation ( ) → bool ¶Ĭhecks if this node starts a variation (and can thus have a startingĬomment). is_end ( ) → bool ¶Ĭhecks if this node is the last node in the current variation. end ( ) → ¶įollows the main variation to the end and returns the last node. More if the game was started from a custom position. Usually this is equal to the number of parent nodes, but it may be Returns the number of half-moves up to this node, as indicated byįullmove number and turn of the position.

It’s a copy, so modifying the board will not alter the game. Variant) unless the FEN header tag is set.

Gets a board with the position of the node.įor the root node, this is the default starting position (for the That occur before any moves are assigned to the root node. variations : List ¶Ī comment that goes behind the move leading to this node. The move leading to this node or None if this is the root node of the The parent node or None if this is the root node of the game. GameNode ( *, comment : str = '' ) ¶ parent : Optional ¶ ( Game, also holding game headers) and many childīoth extend GameNode. Games are represented as a tree of moves.

Center game pgn chess