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6.5Yaku list

Several yaku require the hand to be closed.
When a closed hand is won on a discard, the last group or pair is considered to be melded, but the hand is still closed.

Yaku are cumulative unless specified otherwise, so several yaku may be combined in the same hand.
Yakuman yaku are not cumulative.

6.5Yaku list

For comments, I'll give visual examples.

6.5.1One han yaku

6.5.1One han yaku

RiichiRiichi — [The hand must be closed]
Closed waiting hand declared at 1,000 points stake.

The player must declare riichi by clearly saying "riichi", rotating the discarded tile sideways and paying 1,000 points to the table by placing a stick by the discards.

If an opponent claims the rotated discard to win, the riichi declaration is voided and the 1,000 points are returned to the riichi declarer. If an opponent claims the rotated tile to make a group, the riichi declarer must rotate his next discard.
A player is not allowed to declare riichi if there are less than four tiles left in the wall.

A player who declared riichi can no longer change his hand. However, he may declare a concealed kong if he draws a tile matching a concealed pung, if this does not change the waiting pattern and if the three tiles can only be interpreted as a pung in the original riichi hand. (E.g. in case of three consecutive pungs in the same suit, no kong may be declared, since the tiles can be interpreted as three identical chows).

A player can declare riichi even if he's furiten.

RiichiRiichi — [The hand must be closed]
1sou2sou3sou7sou7sou7sou5man6man7man8manback9man9manbacktenbo10008man

IppatsuIppatsu — [The hand must be closed]
A player who declares riichi will be rewarded for Ippatsu if he wins during the next uninterrupted set of rounds, including if he wins by self-draw on his next draw.
Calls for chow, pung or kong, including concealed kong declarations, interrupt the round, making Ippatsu invalid. Riichi declarations do not interrupt the round.

IppatsuIppatsu — [The hand must be closed]

Double RiichiDaburu riichi — [The hand must be closed]
A player who declares riichi on his first discard, during the very first un-interrupted set of turns, will be rewarded for Double Riichi.
Calls for chow, pung or kong, including concealed kong declarations, interrupt the round, making later Double Riichi invalid. Riichi declarations do not interrupt the round.

Double RiichiDaburu riichi — [The hand must be closed]

Fully Concealed HandMenzen tsumo — [The hand must be closed]
Winning on a self-draw on a closed hand.

Fully Concealed HandMenzen tsumo — [The hand must be closed]
2sou3sou4sou3pin4pin5pin6pin7pin8pin9pinback3man3manback tsumo 6pin

PinfuPinfu — [The hand must be closed]
The pinfu yaku is awarded for winning on a closed pinfu hand.
A pinfu hand is a hand worth no minipoints beside the 20 minipoints for winning and the 10 minipoints for winning on a discard on a closed hand. The 2 minipoints for winning by self-draw are omitted in order to qualify as a pinfu hand and thus to score the pinfu yaku.

Technically, a pinfu hand has four chows and a pair that is neither dragons, nor seat wind, nor prevailing wind; the winning tile completing a chow with a two-sided wait.

PinfuPinfu — [The hand must be closed]
4sou5sou6sou6sou7sou8sou9sou9sou3pin4pin5pin7man8man6man

Pure Double ChowIipeikō — [The hand must be closed]
Closed hand with two completely identical chows, i.e. the same values in the same suit.

Pure Double ChowIipeikō — [The hand must be closed]
2sou3sou4sou2sou3sou4sou1man2man3man5man5man5man7man7man

All SimplesTan'yao
Hand with no terminals and honours. The hand can be open or closed.

All SimplesTan'yao
3sou4sou5sou2pin3pin4pin5pin6pin7pin8pin8pin6man7man8man

YakuhaiYakuhai
Pung or kong of dragons, the player’s seat wind or the prevailing wind.
Multiple yakuhai combines.
If the player’s seat wind is the same as the prevailing wind, a pung or kong of this wind scores yakuhai twice.

YakuhaiYakuhai
3pin4pin5pin7pin8pin9pin1man2man3man8man8manredredred

7sou8sou9sou9sou9sou9sou3man4man5man7man7maneasteasteast
(If the player is East, or if the round wind is East.)

Robbing a KongChankan
Winning on a tile that an opponent adds to a melded pung in order to make a kong. Since the kong is not declared successfully, no kan dora is revealed.
Robbing a Kong is scored as a win on a discard.
Robbing a Kong also applies when winning on Thirteen Orphans on a tile used by an opponent for making a concealed kong. A concealed kong can only be robbed in the case of Thirteen Orphans.

Robbing a KongChankan

After a KongRinshan kaihō
Winning on a replacement tile after declaring a kong.
Counts as self-draw; the two minipoints for winning on self-draw are awarded.

After a KongRinshan kaihō
2pin3pin4pin5pin6pin6man7man8manwestwest7sou7sou7sou7sou rinshan 1pin

Last Tile DrawHaitei
Winning on self-draw on the last tile of the live wall.
If the last tile of the wall is a replacement tile drawn after a kong, only After a Kong will be scored. I.e. you cannot score Last Tile Draw and After a Kong together.

Last Tile DrawHaitei

Last Tile ClaimHōtei
Winning by claiming the discard after the last tile of the wall.
Last Tile ClaimHōtei

6.5.2Two han yaku

6.5.2Two han yaku

Seven PairsChiitoitsu — [The hand must be closed]
Closed hand with seven different pairs. Having two identical pairs invalidates this yaku.
Seven Pairs always scores exactly 25 minipoints; extra minipoints for e.g. a pair of dragons are not awarded.

Seven PairsChiitoitsu — [The hand must be closed]
5sou5sou8sou8sou7pin7pin1man1maneasteastgreengreenredred

Pure StraightIkkitsukan / Ittsū — [Worth only one han if the hand is open]
Hand with three consecutive chows in the same suit.

Pure StraightIkkitsukan / Ittsū — [Worth only one han if the hand is open]
1pin2pin3pin4pin5pin6pin7pin8pin9pinnorthnorth6sou7sou8sou

Mixed Triple ChowSanshoku dōjun — [Worth only one han if the hand is open]
Hand with three chows of the same numerical sequence, one in each of the three suits.

Mixed Triple ChowSanshoku dōjun — [Worth only one han if the hand is open]
1sou2sou3sou1pin2pin3pin7man7man1man2man3man5pin5pin5pin

Outside HandChanta — [Worth only one han if the hand is open]
All groups contain terminals or honours, and the pair is made of terminals or honours.
The hand must contain at least one chow.

Outside HandChanta — [Worth only one han if the hand is open]
9sou9sou9sou1pin2pin3pineasteast8man7man9mannorthnorthnorth

All PungsToitoi
Hand with four pungs / kongs and a pair.

All PungsToitoi
4sou4sou4sou7sou7sou7souredred6pin6pin6pinwestwestwestwest

Triple PungSanshoku dōkō
Hand with three pungs / kongs of the same number, one in each suit.

Triple PungSanshoku dōkō
2sou2sou2sou2pin2pin2pin7pin8pin9pinsouthsouth2man2man2man

Three Concealed PungsSan'ankō
Hand with three concealed pungs / kongs.
Note that the entire hand is not required to be closed.

Three Concealed PungsSan'ankō
8sou8sou8sou9sou9sou9sou8man8manback1pin1pinback1man2man3man

Three KongsSankantsu
Hand with three kongs.

Three KongsSankantsu
4pin5pin6pin3man3man7sou7sou7sou7sou3pin3pin3pin3pinbackredredback

All Terminals and HonoursHonrōtō
Hand containing only terminals and honours.
Add two han for All Pungs or Seven Pairs.
Does not combine with Outside Hand.

All Terminals and HonoursHonrōtō
1sou1sou1sou9pin9pin9pinnorthnorthnorthwhitewhitewhitegreengreen
Also scores All Pungs.

1sou1sou9sou9sou1pin1pin9man9maneasteastsouthsouthredred
Also scores Seven Pairs.

Little Three DragonsShōsangen
Hand with two pungs / kongs of dragons and a pair of dragons.
Add the two han for the individual pungs / kongs of dragons.
Little Three DragonsShōsangen
6pin7pin8pin4man4man4mangreengreengreenwhitewhiteredredred

6.5.3Three han yaku

6.5.3Three han yaku

Twice Pure Double ChowsRyanpeikō — [The hand must be closed]
Closed hand with four chows forming two distinct Pure Double Chows.
Does not combine with Pure Double Chow.

Twice Pure Double ChowsRyanpeikō — [The hand must be closed]
5sou6sou7sou5sou6sou7sou3pin4pin5pin3pin4pin5pinredred

Half FlushHon'itsu — [Worth only two han if the hand is open]
Hand with tiles from only one of the three suits, in combination with honours.

Half FlushHon'itsu — [Worth only two han if the hand is open]
1man1man1man4man5man6man8man8manwhitewhitewhite2man2man2man

Terminals in All GroupsJunchan — [Worth only two han if the hand is open]
All groups contain terminals, and the pair is made of terminals.
The hand must contain at least one chow.
Does not combine with Outside Hand.
Terminals in All GroupsJunchan — [Worth only two han if the hand is open]
9sou9sou9sou1man2man3man9man9man8pin7pin9pin1pin1pin1pin1pin

6.5.4Mangan yaku

6.5.4Mangan yaku

Blessing of ManRenhō — [The hand must be closed]
Winning on a discard in the very first un-interrupted set of turns, before the player has had his first turn.
Calls for chow, pung or kong, including concealed kong declarations, interrupt the round, making later Blessing of Man invalid. Riichi declarations do not interrupt the round.
Blessing of Man is not cumulative with other yaku and dora.
Blessing of ManRenhō — [The hand must be closed]
Blessing of Man is only scored mangan, while Blessing of Heaven and Blessing of Earth are yakuman hands, because my survey of competition rules around the world shows that Blessing of Heaven and Blessing of Earth are widely used and scored yakuman, while Blessing of Man is a mixed case: some score it yakuman, others give mangan, and other others give nothing.
On this point, WRCR is kinda mid-path world's custom.

For info, at the time of WRCR's first version, RMU used to score Blessing of Man 4 han cumulative with other yaku and dora, but recently (2014) switched it to nothing.

6.5.5Six han yaku

6.5.5Six han yaku

Full FlushChin'itsu — [Worth only five han if the hand is open]
Hand composed entirely of tiles from only one of the three suits, without any honours.
Does not combine with Half Flush.
Full FlushChin'itsu — [Worth only five han if the hand is open]
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6.5.6Yakuman yaku

6.5.6Yakuman yaku

Blessing of HeavenTenhō — [The hand must be closed]
East player winning on his initial dealt tiles.
Not valid if the player declares a concealed kong.

Blessing of HeavenTenhō — [The hand must be closed]

Blessing of EarthChihō — [The hand must be closed]
Winning on self-draw in the very first un-interrupted set of turns.
Calls for chow, pung or kong, including concealed kong declarations, interrupt the round, making later Blessing of Earth invalid. Riichi declarations do not interrupt the round.

Blessing of EarthChihō — [The hand must be closed]

Thirteen OrphansKokushi musō — [The hand must be closed]
Closed hand with one of each of the thirteen different terminal and honour tiles, plus one extra terminal or honour tile. The hand can be completed on any tile; it does not need to be waiting on thirteen different tiles.

As a special case, it's possible to rob a concealed kong to win on Thirteen Orphans.

Thirteen OrphansKokushi musō — [The hand must be closed]
It does not need to be waiting on thirteen different tiles.
1sou1sou9sou1pin9pin9maneastsouthwestnorthgreenredwhite1man

Nine GatesChūren pōto — [The hand must be closed]
Closed hand consisting of the tiles 1112345678999 in the same suit, plus any one extra tile in the same suit. The hand can be completed on any tile; it does not need to be waiting on nine different tiles.

Nine GatesChūren pōto — [The hand must be closed]
1man1man1man2man4man5man6man7man8man8man9man9man9man3man

Four Concealed PungsSūankō
Hand having four concealed pungs and/or kongs.
I.e. a closed hand with four concealed pungs, completed by self-draw or by claiming a tile to complete the pair.

Four Concealed PungsSūankō
1pin1pin1pin8pin8pin8pin4man4man4maneasteasteastredred

6sou6sou6sou5man5man5manwestwestnorthnorthbackgreengreenback tsumo west

Four KongsSūkantsu
Hand with four kongs.

Four KongsSūkantsu
5sou5sou5sou5sou4pin4pin4pin4pin7man7man7man7manbacknorthnorthbackeasteast

All GreenRyūiisō
Hand composed entirely of green tiles. Green tiles are: Green dragon and 2, 3, 4, 6 and 8 of bamboo. The hand is not required to include the Green dragon.

All GreenRyūiisō
The hand is not required to include the Green dragon.
2sou3sou4sou4sou4sou6sou6sou6sou4sou2sou3sou8sou8sou8sou

2sou2sou2sou3sou3sou3sou8sou8sougreengreengreen6sou6sou6sou

All TerminalsChinrōtō
Hand composed entirely of terminal tiles.

All TerminalsChinrōtō
1man1man1man1sou1sou9man9man9man9manback1pin1pinback9sou9sou9sou

All HonoursTsūiisō
Hand composed entirely of honour tiles.

All HonoursTsūiisō
southsouthsouthwestwestwesteasteastwhitewhitewhiteredredred

Big Three DragonsDaisangen
Hand with three pungs and/or kongs of dragons.
A player feeding the last pung or kong may be subject to liability payment.

Big Three DragonsDaisangen
1pin2pin3pin6man6manredredredwhitewhitewhitebackgreengreenback

Little Four WindsShōsūshi
Hand with three pungs and/or kongs of winds and a pair of winds.

Little Four WindsShōsūshi
7man7man7maneasteasteastwestwestwestnorthnorthnorthsouthsouth

Big Four WindsDaisūshi
Hand with four pungs and/or kongs of winds.
A player feeding the last pung or kong may be subject to liability payment.
Big Four WindsDaisūshi
2sou2soueasteasteastsouthsouthsouthwestwestwestnorthnorthnorth

While it makes sense to score Big Four Winds more than Little Four Winds, EMA and Mahjong Montréal (now Club Riichi de Montréal) are the world exceptions about it. According to my survey, every other competition rules score both Little Four Winds and Big Four Winds single yakuman.
Also, allowing a double yakuman while not allowing to stack two yakuman makes a clumsy scoring system.