Forum:Attack if able???

What is the meaning of must attack, if able in cards like All-Out Attack, Savage Colosseum, or Battle Mania? Do my defense position monsters have to change battle position to attack position then attack? How about my set monster? Can I just skip my battle phase so that none of my monster has to attack? Can I choose the order of attacking monster(s)? What if my monster is summoned at the end of battle phase? --118.172.103.218 (talk) 14:19, August 13, 2010 (UTC)