private double GetFailureProbabilityForSuit(int cards, int discards, CardSuit suit)
{
int cardSet = BitwiseCardHelper.GetCardSet(cards, suit);
int discardsCount = BitwiseCardHelper.GetSuitCount(discards, suit);
int otherSuitsDistribution = CardSuitDistribution.GetDistribution(cards, discards, suit);
return(MisereProbabilities.GetFailureProbability(cardSet, discardsCount, otherSuitsDistribution, IsFirstHand));
}
protected override double EvaluateCards(int cards, int discards)
{
Debug.Assert(BitwiseCardHelper.GetCardCount(cards) == 10);
int trumpCount = BitwiseCardHelper.GetSuitCount(cards, mTrumpSuit);
// Don't consider trump game if the number of trumps is less than 4.
// TODO Consider 3-3-3-1.
if (trumpCount < 4)
{
return(double.MinValue);
}
IEnumerable <TrickProbability> totalProbabilities = Enumerable.Empty <TrickProbability>();
// Calculate sum of tricks with corresponding probabilities in all suits.
for (var suit = CardSuit.Spades; suit <= CardSuit.Hearts; suit++)
{
int cardSet = BitwiseCardHelper.GetCardSet(cards, suit);
IEnumerable <TrickProbability> probabilities = TrickPlayProbabilities.GetTrickProbabilities(cardSet);
// Combine probabilities..
totalProbabilities = totalProbabilities.Combine(probabilities);
}
bool isEasyLevel = (Game.Options.DifficultyLevel == GameDifficultyLevel.Beginner) ||
(Game.Options.DifficultyLevel == GameDifficultyLevel.Amateur);
// The following stuff is too complex for weak players.
if (!isEasyLevel)
{
totalProbabilities = ConsiderTrumpAdvancing(totalProbabilities);
totalProbabilities = ConsiderTrickTaking(totalProbabilities);
}
return(totalProbabilities.Expectation(
tricks => Game.Rules.GetGameCost(
GameType.TrickPlay,
Game.Options.NumberOfPlayers,
DeclaredTricks,
tricks)));
}