Setup
Determine Seating / Determine Starting Dealer
That's one way among many others, and I don't think this one is standard (remember you complained that other guides "aren't always clear that they're non-standard"
).
It's a bit confusing to talk about a white dragon tile since it's not used. Readers will think they missed a part.
Set Up Walls / Break the Walls / Assemble Initial Hands
It's not compulsory, but one or two picture will help.
East player seems to forget to take his/her 14th tile.
Distribute Chips
"The bonus plus the total number of points all players start with combine to yield the total number of points in the game (see scoring)"
I didn't see to what the "see scoring" refers.
Anyway, I'll just say "The bonus plus the total number of points all players start with equals 120,000." It's simpler and standard.
Play
You should really NOT use the term "set" to talk about three identical tiles. In common English literature, it's called "pon". If you prefer to use a more correct word, use "koutsu".
"Set" is wildly used as a generic word to designate either a chii (shuntsu), a pon (koutsu), or a kan (kantsu).
Temporary Furiten
"-Unlike regular Furiten, players in temporary Furiten may win by taking any player's tile which is not the one the player is in temporary Furiten for"
Donno were you see that
Riichi
"-A player may declare Riichi when in Tenpai with a closed hand (no tiles have been stolen to form the hand) AND when the hand is containing at least one Yaku"
No, a player can declare riichi with no other yaku than riichi.
Drawing a Hand
"-After the penalty payment, if the dealer successfully claimed Tenpai or if no players successfully claimed Tenpai, a bonus round is performed as though the dealer won"
No, if no one is tenpai, the deal moves.
Conditions for a Null Hand / Conditions for a Null Hand leading to a bonus round
You should merge theses two chapters.
Bonus Round (Renchan)
"-During the fifth bonus round and beyond, a winning hand must contain at least two Han, although it may have only one Yaku"
Add: "dora are not counted for the two han requirement".
Chi
"The pair used in the run". You mean: "The two other tiles of the run".
"The left-most tile of the run is oriented horizontally and the other two vertically"
I would have said: "The stolen tile is put on the left-most side of the run and is oriented horizontally, while the other two vertically"
Pon
"-If multiple people attempt to Pon the same tile, the first player counter-clockwise from the discarding player succeeds"
"-This form of stealing can be overridden by another player calling Kan, or Ron on the same tile"
Please, please ... if more than one player claims the same tile for pon/kan, it means there is at least 5 identical tiles. It's impossible!
Kan
"Alternately, if the tile drawn at the beginning of a player's turn is the fourth identical tile..."
In fact, even if you draw an other tile, you can declare a kan.
But you can not declare a concealed/promoted kan on a turn if you didn't draw (i.e. when you claim a chi or pon).
"-If multiple people attempt to Kan the same tile, the first player counter-clockwise from the discarding player succeeds"
That's even worse:
1) player A discard a
,
2) player B have
in his hand and so claims kan,
3) player C have
in his hand too, and claims kan,
4) player D ask who is lying or if someone is cheating.
"Move the next tile in the live wall to the right side of the dead wall"
You mean: "Move the last tile..."
"Note: The Kan serves as a set for the purposes of determining a legal hand unless the hand explicitly requires it to be a set"
True, but no hands requires to have koutsu and not kantsu.
Rounds
"If modern rules are used and the end of the South round is reached with no player having
a score equal to at least 25% of the players' total initial hand values plus winner bonus, a West round is played"
What?! Why did you not just say "a score equal to at least 30,000 points"?
Ending the Game
"Optional rule: If arranged before the game, after bonus payments are made the fourth player pays the winner a pre-agreed upon bonus and the third player pays a smaller pre-agreed bonus to the second player,
often 9,000 and 3,000 points"
AFAIK, only the EMA use a so small uma.
I'm not sure you can set-up a japanese mahjong software to use this values (AI Majong can't).
Chombo
"Too many tiles in a player's hand"
For me (and EMA), the penalty is a dead hand, not a chonbo.
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I didn't read the Scoring section and below yet, so my comments stops here for now.
