/// <summary>
/// Finds the TileTypeId of the discard with highest UkeIre while maintaining shanten.
/// </summary>
public int GetHighestUkeIreDiscard()
{
Debug.Assert(TilesInHand() == 14, "Have to be able to discard a tile");
// If we have a winning hand, all discards will lead to worse shanten
var currentShanten = CalculateShanten(ArrangementValues);
if (currentShanten == 0)
{
return(ConcealedTiles[0]);
}
var tileTypeId = 0;
var localArrangements = new[] { ArrangementValues[0], ArrangementValues[1], ArrangementValues[2], ArrangementValues[3] };
var highestUkeIre = -1;
var highestUkeIreDiscard = -1;
for (var suit = 0; suit < 3; ++suit)
{
for (var index = 0; index < 9; ++index)
{
if (ConcealedTiles[tileTypeId] > 0)
{
var kyuuhaiValue = (0b100000001 >> index) & 1;
ConcealedTiles[tileTypeId] -= 1;
InHandByType[tileTypeId] -= 1;
Kokushi.Discard(kyuuhaiValue, ConcealedTiles[tileTypeId]);
Chiitoi.Discard(ConcealedTiles[tileTypeId]);
Base5Hashes[suit] -= Base5.Table[index];
localArrangements[suit] = SuitClassifiers[suit].GetValue(ConcealedTiles, suit, Base5Hashes);
var newShanten = CalculateShanten(localArrangements);
if (newShanten == currentShanten)
{
var ukeIre = SumUkeIre(currentShanten, localArrangements, HonorClassifier);
if (ukeIre > highestUkeIre)
{
highestUkeIre = ukeIre;
highestUkeIreDiscard = tileTypeId;
}
}
Base5Hashes[suit] += Base5.Table[index];
Kokushi.Draw(kyuuhaiValue, ConcealedTiles[tileTypeId]);
Chiitoi.Draw(ConcealedTiles[tileTypeId]);
ConcealedTiles[tileTypeId] += 1;
InHandByType[tileTypeId] += 1;
}
tileTypeId += 1;
}
localArrangements[suit] = ArrangementValues[suit];
}
for (var index = 0; index < 7; ++index)
{
if (ConcealedTiles[tileTypeId] > 0)
{
ConcealedTiles[tileTypeId] -= 1;
InHandByType[tileTypeId] -= 1;
var tileCountAfterDiscard = ConcealedTiles[tileTypeId];
Kokushi.Discard(1, tileCountAfterDiscard);
Chiitoi.Discard(tileCountAfterDiscard);
var localHonorClassifier = HonorClassifier.Clone();
localArrangements[3] = localHonorClassifier.Discard(tileCountAfterDiscard, JihaiMeldBit >> index & 1);
var newShanten = CalculateShanten(localArrangements);
if (newShanten == currentShanten)
{
var ukeIre = SumUkeIre(currentShanten, localArrangements, localHonorClassifier);
if (ukeIre > highestUkeIre)
{
highestUkeIre = ukeIre;
highestUkeIreDiscard = tileTypeId;
}
}
Chiitoi.Draw(tileCountAfterDiscard);
Kokushi.Draw(1, tileCountAfterDiscard);
ConcealedTiles[tileTypeId] += 1;
InHandByType[tileTypeId] += 1;
}
tileTypeId += 1;
}
Debug.Assert(highestUkeIreDiscard != -1, "There should always be a tile to discard.");
return(highestUkeIreDiscard);
}
public YakuConfig()
{
var id = 0;
aka_dora = new AkaDora(++id);
tenhou = new Tenhou(++id);
// Yaku situations
tsumo = new Tsumo(++id);
riichi = new Riichi(++id);
open_riichi = new OpenRiichi(++id);
ippatsu = new Ippatsu(++id);
chankan = new Chankan(++id);
rinshan = new Rinshan(++id);
haitei = new Haitei(++id);
houtei = new Houtei(++id);
daburu_riichi = new DaburuRiichi(++id);
daburu_open_riichi = new DaburuOpenRiichi(++id);
nagashi_mangan = new NagashiMangan(++id);
renhou = new Renhou(++id);
// Yaku 1 Han
pinfu = new Pinfu(++id);
tanyao = new Tanyao(++id);
iipeiko = new Iipeikou(++id);
haku = new Haku(++id);
hatsu = new Hatsu(++id);
chun = new Chun(++id);
east = new East(++id);
south = new South(++id);
west = new West(++id);
north = new North(++id);
yakuhai_place = new YakuhaiPlace(++id);
yakuhai_round = new YakuhaiRound(++id);
// Yaku 2 Hans
sanshoku = new Sanshoku(++id);
ittsu = new Ittsu(++id);
chantai = new Chanta(++id);
honroto = new Honroutou(++id);
toitoi = new Toitoi(++id);
sanankou = new Sanankou(++id);
sankantsu = new Sankantsu(++id);
sanshoku_douko = new SanshokuDoukou(++id);
chiitoitsu = new Chiitoitsu(++id);
shosangen = new Shousangen(++id);
// Yaku 3 Hans
honitsu = new Honitsu(++id);
junchan = new Junchan(++id);
ryanpeiko = new Ryanpeikou(++id);
// Yaku 6 Hans
chinitsu = new Chinitsu(++id);
// Yakuman list
kokushi = new Kokushi(++id);
chuuren_poutou = new ChuurenPoutou(++id);
suuankou = new Suuankou(++id);
daisangen = new Daisangen(++id);
shosuushi = new Shousuushii(++id);
ryuisou = new Ryuuiisou(++id);
suukantsu = new Suukantsu(++id);
tsuisou = new Tsuisou(++id);
chinroto = new Chinroutou(++id);
daisharin = new Daisharin(++id);
daichisei = new Daichisei(++id);
// Double yakuman
daisuushi = new Daisuushii(++id);
daburu_kokushi = new DaburuKokushi(++id);
suuankou_tanki = new SuuankouTanki(++id);
daburu_chuuren_poutou = new DaburuChuurenPoutou(++id);
// Yakuman situations
tenhou = new Tenhou(id++);
chiihou = new Chiihou(++id);
renhou_yakuman = new RenhouYakuman(++id);
sashikomi = new Sashikomi(++id);
paarenchan = new Paarenchan(++id);
// Other
dora = new Dora(++id);
aka_dora = new AkaDora(++id);
}
private int SumUkeIre(int currentShanten, int[] arrangements, ProgressiveHonorClassifier localHonorClassifier)
{
var ukeIre = 0;
var tileTypeId = 0;
var localArrangements = new[] { arrangements[0], arrangements[1], arrangements[2], arrangements[3] };
for (var suit = 0; suit < 3; ++suit)
{
for (var index = 0; index < 9; ++index)
{
if (InHandByType[tileTypeId] != 4)
{
var kyuuhaiValue = (0b100000001 >> index) & 1;
Kokushi.Draw(kyuuhaiValue, ConcealedTiles[tileTypeId]);
Chiitoi.Draw(ConcealedTiles[tileTypeId]);
ConcealedTiles[tileTypeId] += 1;
Base5Hashes[suit] += Base5.Table[index];
localArrangements[suit] = SuitClassifiers[suit].GetValue(ConcealedTiles, suit, Base5Hashes);
var newShanten = CalculateShanten(localArrangements);
Debug.Assert(currentShanten >= newShanten);
var a = currentShanten - newShanten;
var t = (4 - InHandByType[tileTypeId]) * a;
ukeIre += t;
ConcealedTiles[tileTypeId] -= 1;
Base5Hashes[suit] -= Base5.Table[index];
Kokushi.Discard(kyuuhaiValue, ConcealedTiles[tileTypeId]);
Chiitoi.Discard(ConcealedTiles[tileTypeId]);
}
tileTypeId += 1;
}
localArrangements[suit] = arrangements[suit];
}
for (var index = 0; index < 7; ++index)
{
if (InHandByType[tileTypeId] != 4)
{
var previousTileCount = ConcealedTiles[tileTypeId];
Kokushi.Draw(1, previousTileCount);
Chiitoi.Draw(previousTileCount);
localArrangements[3] = localHonorClassifier.Clone().Draw(previousTileCount, JihaiMeldBit >> index & 1);
var newShanten = CalculateShanten(localArrangements);
Debug.Assert(currentShanten >= newShanten);
var a = currentShanten - newShanten;
var t = (4 - InHandByType[tileTypeId]) * a;
ukeIre += t;
Kokushi.Discard(1, previousTileCount);
Chiitoi.Discard(previousTileCount);
}
tileTypeId += 1;
}
return(ukeIre);
}
