internal bool Exec(BoardModel board, bool phase2)
{
_board = board;
_phase1 = !phase2;
_phase2 = phase2;
return((EvalExec() as BoolValue).Value);
}
// create moves for this piece and position on this board
internal IList <MoveModel> CreateMoves(PositionValue position, BoardModel board, MoveTypeValue movetype)
{
Logger.WriteLine(5, "Create moves piece:{0} position:{1}", _piecedef.Piece, position);
return(_movecodes
.SelectMany(c => c.CreateMoves(MoveKinds.Move, _piecedef.Piece, position, board, movetype))
.ToList());
}
// Generate drops for current player for all pieces
// use all pieces that have moves defined (check off store later) and all positions on the board
// TODO: only do drops for pieces with offstore > 0?
internal IList <MoveModel> CreateDrops(BoardModel board)
{
return(_piececodes
.SelectMany(p => board.Def.PositionLookup.Keys
.SelectMany(q => p.Value.CreateDrops(q, board, board.Turn.MoveType)))
.ToList());
}
// main entry point for generating moves for player, piece and position
// note that a gencode block can contain multiple sections and generate multiple moves for the position
// CHECK: the state block persists and must be reinitialised
internal IList <MoveModel> Exec(MoveKinds kind, PieceValue piece, PositionValue position, BoardModel board)
{
_board = board;
_state = MoveGenState.Create(kind, piece, position, board);
EvalExec();
return(_state.MoveList);
}
//-- factories
internal static ChoiceMaker Create(BoardModel board, ChooserKinds kind, int steps, int depth)
{
return(new ChoiceMaker {
_choice = Choice.Create(board),
_kind = kind,
StepCount = steps,
MaxDepth = depth,
});
}
// Generate moves for all pieces on board for this player
// use pieces only for this player, only if moves defined, and current position on the board
internal IList <MoveModel> CreateMoves(BoardModel board)
{
var player = board.MovePlayer;
return(board.PlayedPieceLookup
.Where(p => p.Value.Player == player)
.Where(p => _piececodes.ContainsKey(p.Value.Piece))
.SelectMany(p => _piececodes[p.Value.Piece].CreateMoves(p.Key, board, board.Turn.MoveType))
.ToList());
}
//-- factories
static internal Choice Create(BoardModel board)
{
return(new Choice {
Board = board,
IsDone = board.HasResult,
Weight = 0,
BestIndex = -1, // invalid until set
VisitCount = 0,
WinCount = 0,
Children = new Choice[board.LegalMoves.Count],
});
}
// check goal conditions for current player to see if game has ended and how
internal ResultKinds CheckCondition(GoalDef goal, BoardModel board, bool phase2)
{
return(goal.Code.Exec(board, phase2) ? goal.Kind : ResultKinds.None);
}
//-- methods
// get weight for board resulting from last move
internal static double GetWeight(BoardModel board)
{
return(-_weightlookup[board.MoveResult]);
}