To say that a card is face-down, is to say the back part of the card is facing up. When a Monster Card is face-down, it can only be horizontal (i.e., in Defense Position). You can only have a face-down monster in Attack Position by the effect of Darkness Approaches.
When a Spell or Trap Card is face-down, it is always vertical.
When any card is face-down, unless specifically mentioned by a card effect, its controller is not obligated to disclose any details of that card to his/her opponent, even if that card was face-up on the field a short time ago.
Monster Effects can not be activated Face-Down unless it says so on the card (ex.Big Shield Gardna).
Monster Cards - Spell Cards - Trap Cards Types of Monster Cards Effect - Fusion - Normal - Ritual - Synchro - Dark Synchro Types of Spell Cards Continuous - Field - Equip Types of Trap Cards Continuous - Counter - Normal Other Types of Card Manga Cards Virus - Trap-Spell Equip Trap Cards - Field Trap Cards Turn Phases Draw Phase - Standby Phase - Main Phase 1 |
ATK - DEF - Level - Attribute - Type Playing Field Zones Monster Zones - Spell/Trap Zones Types of Summon Flip - Normal - Tribute | Activate - Chain - Costs - Counters - Destroy Types of Monster Effects Continuous - Flip - Ignition - Quick Compulsory - Optional - Lingering Types of Effect Monsters Flip - Gemini - Spirit - Toon - Tuner - Union - Dark Tuner Types of Spell Speed | Tournament Guidelines Duel - Infinite Loop - Maintenance Costs Double Tributer - Victory Conditions Attributes DARK - EARTH - FIRE - LIGHT - WATER - WIND Types Aqua - Beast - Beast-Warrior - Dinosaur |