There are 810 rules at Heartslabyul that are said to have been invented by the Queen of Hearts herself.
Yana has explained (source) that there 810 because of how “heart” is pronounced: Heart is read as ハート / hah – toh, with “hah” being a way that 8 can be pronounced and “toh” being a way that 10 can be pronounced. 810 = Heart.
The ones we have seen in the Twisted Wonderland game are:
Rule 1: You must run at top speed forever and always to remain in the same spot
Rule 23: One must never bring a cat to a formal affair
Rule 53: When something is stolen from you, you must take it back
Rule 63: Those who anger the queen in court must run through a maze with card soldiers in pursuit
Rule 89: Never eat a tart without the Queen’s permission
Rule 124: When you get soaking wet, you must dry off with a run in the ocean
Rule 153: No black tea at night? (a little vague)
Rule 186: Never eat Salisbury steak on Tuesday (changed to “hamburger” on EN)
Rule 228: Flowers in gardens must never be picked on Wednesdays
Rule 249, Flamingo caretakers are to don pink attire
Rule 256, No drinking honey-sweetened lemonade after 8pm
Rule 271, One must leave the table within fifteen minutes of completing their lunch
Rule 304 (Manga/Anime only), On days when a hedgehog sneezes, all card soldiers are to assemble to perform a song
Rule 339, The post-meal beverage is to be lemon tea with two sugar cubes
Rule 346, Croquet must not be played after 5:00pm
Rule 372: If a red-capped mushroom sprouts on a Monday morning, the roses in the garden must be white
Rule 412: When you see a pair of moving glasses in the forest, never go back the way you came
Rule 434: If you see a caterpillar exactly seven centimeters high, you must recite a poem to its discoverer
Rule 469: When throwing a party for new friends, one must decorate with both red and white roses
Rule 529: If you eat a steak on the night of a full moon, a cat must play the violin afterwards
Rule 562, One must never bring a chestnut tart to an unbirthday tea party
Rule 648: One must brush one’s teeth twice over after eating turkey
Rule 703: Anyone who comes in second in a croquet tournament must serve the queen tea the next day
Twisted Wonderland Reference Note 