Come out on June 5th for Day 1 of this event organized through Ed, Edd, & Edison YouTube and the Format Library Discord. Entry is FREE and top players will share a $400 USD prize pool which will DOUBLE to $800 USD if attendance cracks 200 players!

Make sure you and your friends are ready by taking the Edison Format Rules Quiz. Don't let weird rulings knock you out of the tournament! 

Special thanks to discord user MMF for compiling information pertaining to how card interactions that create infinite loops (the infamous "Pole Position") were ruled during Edison Format, as well as additional information  concerning the End-of-Turn discard a player must perform to ensure they do not exceed their hand size limit. The Edison Format Rules page has been updated with these rules (numbered #10 and #11). Hop on over to give them a read, or click "Read More" to see them presented below. Additionally, "Pole Position" has been added to the Individual Rulings page.

Thanks to Discord user STLF for stumbling upon this detail! Research reveals that Union Monsters printed prior to Structure Deck: Seto Kaiba [REF] had a Condition restricting the number of Union Monsters that could be equipped to a Monster, and also the circumstances under which they could be destroyed in place of the equipped monster. Additionally, they could only be Special Summoned from the Spell / Trap Card Zone into Attack Position. This Condition would cease to be printed, and would be retroactively removed from Union Monsters through via errata. When playing Edison Format, remember that ALL Union Monsters have the following Condition:

• "(A monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed [as a result of battle], destroy this card instead.)"
  

Be sure to familiarize yourself with the specific Conditions that existed for your favourite Union Monsters at the time of SJC Edison before you start playing, just in case the current card text differs!

Duel Terminal 1 released on January 29, 2010, reprinting many old cards while also introducing new strategies. But not all the new cards within the set were deemed tournament legal for the purposes of SJC - Edison or other SJC events at the time. Given the limited nature of Duel Terminal machines, Konami's official policy was as follows:

"New DUEL TERMINAL cards are not tournament legal until they are available through some other method, such as inclusion in a Hidden Arsenal set or some other form of Booster Pack or Deck" [REF].

For a complete list of cards first introduced in DT01 that are NOT LEGAL for Edison Format, click HERE.

In an effort to clarify the rules of play for all players, the "2008 Rules Change" page has been replaced with the more elaborate "Edison Format Rules" page. We've taken inspiration from the work over on GoatFormat.com, so some things should look familiar to other nostalgic duelists. Additionally, a page concerning "Priority" has also been posted to elaborate on the matter discussed on the "Edison Format Rules" page. If you're uncertain whether you have priority to use an ignition effect after performing a Summon, find out whether the Summon was successful HERE.

Let us know if we missed anything, or if you think you've found a ruling worth  adding to the existing 130 already covered on the "Individual Rulings" page!

Internet archeological forum activity points to a discrepancy in rulings surrounding one of the most powerful cards in the format - "Future Fusion". Special thanks to MMF for bringing this to the community's attention and providing a timeline of events regarding these changes!

the TL;DR (click "Read More" for the revised rulings):
- You CANNOT activate "Future Fusion" while "Vanity's Fiend" prevents Special Summoning.
- You CANNOT activate "Future Fusion" while a "Barrier Statue" monster is face-up UNLESS the Fusion Monster you intend to reveal has the allowed Attribute.
- You cannot reveal "Five-Headed Dragon" while "Koa'ki Meiru Drago" is face-up because it is DARK.