There are two '''game statestates''' during the [[Duel]], “'''"open'''” " and “'''close'''”"closed".

Whenever a player performs an action, the game state is “'''close'''”"closed". If nothing is going on, and neither player wishes to do anything, the game state is “'''"open'''”". Technically, this means::'''IF''' the # The [[Turn Player]] has the chance to activate the next [[Fast Effectfast effect]]...:'''AND''' the # The turn player passes to the opponent...:'''AND''' the # The opponent then passes back...:'''AND''' no # No [[Chain]] is currently being formed...…then the The game state is “'''"open'''”".

If the game state is “open”"open", the [[turn player ]] may perform '''''any''''' of the appropriate following actions, those actions arewhen appropriate:*Conduct their [[Normal normal draw]] (during the [[Draw Phase]])*[[Normal Summon]] / [[Normal Set|Set]]*[[Normal SetFlip Summon]]*Perform a [[Special Summon]] that '''''(That does not''''' start a [[Chain]] (including )**[[Synchro Summon]]**[[Xyz Summon]], **[[Pendulum Summon]]**[[Synchro Link Summon]])*[[Battle Position changes|Change a monster’s Battle Positionmonster's battle position]]

*[[Declare]] an [[attack]] (during the [[Battle Step]] of the [[Battle Phase]])*[[Activate]] an [[Ignition Effect|Ignition]] or [[Ignition-like Effect]]*Activate a any card/effect of any [[Spell Speed 1]] [[Spell Card]]*Activate a [[Fast Effect]]If the game state is “close”, then '''''only''''' Fast Effects can be activated, '''''dependent''''' on [[Fast Effect Timing]] Rules.