public StrategyResult AttemptStrategy(out bool finished, out bool invalid, Difficulty cap = Difficulty.All)
{
invalid = false;
if (PuzzleCompleted())
{
finished = true;
return(null);
}
finished = false;
Snapshot snapshot = new Snapshot(board.Select(cell => cell.info.Clone()).ToArray());
foreach (Strategy strategy in strategies)
{
if ((int)strategy.difficulty > (int)cap)
{
break;
}
string outInfo = "";
StrategyResult result = strategy.Apply(this, ref outInfo);
if (result != null)
{
if (!ValidatePuzzle())
{
snapshot.CopyTo(this);
invalid = true;
return(null);
}
return(result);
}
}
return(null);
}
public Solution Solve(Difficulty cap = Difficulty.All)
{
List <Snapshot> snapshots = new List <Snapshot>();
snapshots.Add(new Snapshot(this));
List <StrategyResult> steps = new List <StrategyResult>();
bool finished;
bool invalid;
StrategyResult result = AttemptStrategy(out finished, out invalid, cap);
while (result != null)
{
snapshots.Add(new Snapshot(this));
steps.Add(result);
result = AttemptStrategy(out finished, out invalid, cap);
}
Solution solution = new Solution(snapshots, steps, finished, invalid);
snapshots[0].CopyTo(this);
solutionProgress = 0;
return(solution);
}
