public SearchStatistics Start(ISearchNode searchNode)
{
_stopwatch.Start();
// Lock original changer tracker.
// So we are sure that original game state stays intact.
// This is usefull for debuging state copy issues.
_game.ChangeTracker.Lock();
// Both original and copied tracker will be enabled,
// but only the copy is unlocked and can track state.
_game.ChangeTracker.Enable();
// Copy game state,
var searchNodeCopy = new CopyService().CopyRoot(searchNode);
// create the first worker
var worker = CreateWorker(_root, searchNodeCopy.Game);
// and start the search.
worker.StartSearch(searchNodeCopy);
RemoveWorker(worker);
_game.ChangeTracker.Disable();
_game.ChangeTracker.Unlock();
_root.EvaluateSubtree();
_stopwatch.Stop();
return(GetSearchStatistics());
}
