public override int Play(Board Current)
{
MCEvaluation.SetStrength(Strength);
List<int> CandidateMoves = Utile.PreprocessMoves(Current, Current.GetValidMoves());
int ColumnToPlay = -1;
float BestValue = float.MinValue;
TProcess.Maximum = CandidateMoves.Count;
TProcess.Value = 0;
if (CandidateMoves.Count==0)
{
List<int> C = Current.GetValidMoves();
return C[0];
}
if (CandidateMoves.Count==1)
{
return CandidateMoves[0];
}
foreach (int Move in CandidateMoves)
{
TProcess.PerformStep();
float CurrentValue = MCEvaluation.Evaluate(Current, Move);
if (CurrentValue > BestValue)
{
BestValue = CurrentValue;
ColumnToPlay = Move;
}
}
return ColumnToPlay;
}
public static int GetPlayoutsNumber(Board Current, int ms)
{
int playouts_to_think = 0;
MCScore MCEvaluation = new MCScore();
// test speed
MCEvaluation.SetStrength(1000);
Stopwatch sw = new Stopwatch();
sw.Start();
int Move = Current.GetValidMoves()[0];
float f = MCEvaluation.Evaluate(Current, Move);
sw.Stop();
playouts_to_think = Convert.ToInt32(1000 / (float)sw.Elapsed.TotalMilliseconds * (ms/(float)Current.GetValidMoves().Count));
return playouts_to_think;
}
protected State Expand(Board Game)
{
// maybe the next move
int MoveId;
// until the game ends play it
while (Game.TestVictory() == State.empty)
{
List<int> ValidMoves = Game.GetValidMoves();
MoveId = Rnd.Next(0, ValidMoves.Count - 1);
Game.Move(ValidMoves[MoveId]);
}
// return the winner
return Game.TestVictory();
}
/// <summary>
/// returns a move by minimax and deep cuts
/// </summary>
/// <param name="CurrentSituation">current game situation</param>
/// <returns>move to play</returns>
public override int Play(Board CurrentSituation)
{
List<int> CandidateMoves = CurrentSituation.GetValidMoves(); // get a possible Moves
TProcess.Maximum = CandidateMoves.Count; // display the current thinking progress
TProcess.Value = 0;
float alpha = float.MinValue; // current best valuation alpha
int ColumnToPlay = -1; // column to play
foreach (int M in CandidateMoves) // test a canditate moves
{
TProcess.PerformStep(); // next move => update progressbar
float eval = ScoreMove(CurrentSituation, M, 0); // Score the move
if (eval > alpha) // is this move better?
{
alpha = eval; // then we take this move
ColumnToPlay = M;
}
}
return ColumnToPlay;
}
/// <summary>
/// returns a move by minimax and deep cuts
/// </summary>
/// <remarks>
/// THIS IS STILL BUGGY!!!
/// </remarks>
/// <param name="CurrentSituation">current game situation</param>
/// <returns>move to play</returns>
public override int Play(Board CurrentSituation)
{
Scores.SetStrength(100);
CP = CurrentSituation.CurrentPlayer;
List<int> CandidateMoves = CurrentSituation.GetValidMoves();
TProcess.Maximum = CandidateMoves.Count;
TProcess.Value = 0;
float value = float.MinValue;
int ColumnToPlay = -1;
WorkingBoard = CurrentSituation.Clone();
foreach (int M in CandidateMoves)
{
TProcess.PerformStep();
float eval = ScoreMove(M, 0, float.MinValue, float.MaxValue);
//MessageBox.Show(value.ToString());
if (eval > value)
{
value = eval;
ColumnToPlay = M;
}
}
return ColumnToPlay;
}
public override int Play(Board Situation)
{
List<int> ValidMoves = Situation.GetValidMoves();
int MoveId = r.Next(0, ValidMoves.Count - 1);
return ValidMoves[MoveId];
}
/// <summary>
/// internal score of move
/// </summary>
/// <param name="Situation">current game situation</param>
/// <param name="Move">move to do</param>
/// <param name="deep">current deep</param>
/// <returns>value of move</returns>
protected float ScoreMove(Board Situation, int Move, int deep)
{
// game finished?
State Result = Situation.TestVictory();
// if game is finished ...
if (Result != State.empty)
{
// is draw?
if (Result == State.draw)
return 0.0f;
// else return score 1.0f for winning and -1.0f for loosing
return (Result == Situation.CurrentPlayer) ? 1f : -1f;
}
// cut deep
if (deep == MAX_DEEP)
{
// adjust strength dynamically
int S = Convert.ToInt32(Strength / ((double)Math.Pow(7, MAX_DEEP)));
Scores.SetStrength(S);
// Score Board due monte carlo
return Scores.Evaluate(Situation, Move);
}
Situation.Move(Move); // do move
List<int> CandidateMoves = Situation.GetValidMoves(); // new situation, so new possible moves
float val = float.MinValue; // temp alpha value
foreach (int M in CandidateMoves)
{
val = Math.Max(val, -1f * ScoreMove(Situation, M, deep + 1)); // evaluate each move by recursion
}
Situation.UnMove(Move); // redo move
return val; // return value
}
