<Li> Main Phase 1: The turn player may summon or set a monster, activate cards and effects that they control, change the battle position of a monster (provided it wasn't summoned this turn), and set spells or traps face - down . </Li> <Li> Battle Phase: The turn player may choose to attack the opposing player using any monsters on their field in Attack position . If the player chooses not to attack, they can skip straight to the End Phase . </Li> <Li> Main Phase 2: The player may do all the same actions that are available during Main Phase 1, though they cannot repeat certain actions already taken in Main Phase 1 (such as Normal Summoning) or change the battle position of a monster that has already been summoned, attacked, or had their battle position changed during the same turn . </Li> <Li> End Phase: If the player has more than six cards in their hand, they must discard cards until they have six . This phase also exists for card effects that activate or resolve during this specific phase and maintenance costs . Once this phase is resolved, the player ends their turn . </Li>

When do you have to discard cards in yugioh