Java Edition 15w36a

Additions

 * Scoreboard
 * added
 * Subcommands:,  ,  ,

Changes

 * Entities
 * Most entities (exceptions being items and xp orbs) can now be pushed by other entities.
 * Fishing rods now properly hook to these entities.
 * Armor
 * Armor defense calculations changed:
 * Max (20) armor points damage reduction reduced from 80% to 66%.
 * Armor points count for less as the attack strength increases: each done by the attack past a certain point reduces the effective defense points by.
 * However, armor points count for more when the attack is weak: each done by the attack before this point increases the defence points by.
 * Enchanting
 * Sharpness and Protection enchantments have been nerfed.
 * Each sharpness level now adds damage to the base damage at level I and an additional 0.5 ( × 0.25) for each additional level, down from a flat  per level.
 * Protection enchantment bonuses are now linear instead of quadratic.
 * Blocks
 * Players unable to use commands such as  can no longer place command blocks.
 * Mobs
 * Mobs no longer reset their AI when hit.
 * All hostile mobs can now draw line of sight through solid blocks in order to track the player.
 * Skeletons, creepers, and zombies
 * Detection range for players wearing the corresponding mob head adjusted to be 50% of the normal range again.
 * Performance
 * Optimized memory usage when connected to servers.