This is kind of a follow up from the previous "A Brief Explanation" article that I made, which goes into a little bit more detail about something I mentioned but didn't talk much about and that, as you can clearly see is, Simultaneous Effects Go On Chain; also known as SEGOC.
In the previous article I talked a bit about spell speed 1 cards and how they cannot chain to anything and will not be higher in a chain other than chain link, apart from some circumstances where some effects may be forced to try an activate at the same time. I then mentioned that you should look up SEGOC. Instead of making you look it up, I thought I might as well make an article about that instead.
A few very well known examples of a SEGOC scenarios could be, when a Mystic Tomato attacks another face up attack position Mystic Tomato, or when a Giant Rat attacks another face up attack position Giant Rat, or when two copies of Sangan are sent to the graveyard from the effect of Dark Hole or Raigeki. When it comes down to these kind of situations, then this is where the exception for spell speed 1 cards chaining to one another and being higher than chain link 1, come into play. This is to my knowledge the only way when spell speed 1 effects will be able to chain to each other, due to the fact that they are all trying to activate at the exact same time and the players are not optionally activating them.
If you have effects that have the activate during the (add chosen phase here) phase, then this will not apply to these effects as these particular effects will activate and be applied separately as they do not form a chain. A common example of this would be your Gladiator Beast archetype. Oh and when you have flip, trigger and trigger-like effects, you need to remember that these effects cannot be chained to another spell speed 1 effect, if their conditions happened after paying the cost. At this point you need to wait until the resolution of that effect, and then activate them.
If anyone was wondering at this point, what the order would be then the order would usually be as followed;
1) Turn Player's Mandatory Effects
2) Non-Turn Player's Mandatory Effects
3) Turn Player's Optional Effects
4) Non-Turn Player's Optional Effects
Which is pretty damn easy to remember, but you also need to remember what you read in my previous post, which is that chains resolve backwards, so number (4) would resolve first, then number (3) then number (2) then number (1).
I hope this helped some people out, as I always aim to try and do so!