In smp4, I have a unbreaking 3 diamond boot.I went out to fight some mob.In difficulty 8, item take 2x durability.I got hit for a total of 20 times, so my boot now have take 429-389=40 durability.According to the wiki, unbreaking 3 have 75% chance to take no durability when used.So (1-0.75)x40=10, my boot should only take 10 durability.But my boot took 40 durability in difficulty 8.Difficulty 8 bypassed unbreaking enchantment.We can test that if you need proof.

Please read the tooltip text of Diff 8 through 10. This is working as intended.Also EMC's Unbreaking formula is modified from Vanilla. Code: int j = EnchantmentManager.getEnchantmentLevel(Enchantment.DURABILITY.id, this); int k = 0; j = Math.min(5, j); // EMC for (int l = 0; j > 0 && l < i; ++l) { // EMC start - make Unbreaking scale to level for armor. 5 = 80% chance of no loss. if (getItem() instanceof ItemArmor) { if (random.nextFloat() >= 1 - (.8 * (j / 5))) { k++; } continue; } // EMC endIt takes Unbreaking 5 to get 80%, so 3 will not give 75%Also the wiki is wrong on Vanilla Unbreaking, as there is a 60% chance that Unbreaking doesn't even kick in for armor on vanilla, and then if it does kick in, its random again from there:This is vanilla logic:return itemstack.getItem() instanceof ItemArmor && random.nextFloat() < 0.6F ? false : random.nextInt(i + 1) > 0;

It does not ignore unbreaking. You're misunderstanding how unbreaking works (due to bad information on the Minecraft Wiki). Unbreaking works PER DAMAGE POINT. It is not a % chance to take no damage at all.On EMC, Unbreaking 3 has a 48% chance per point.So if an item was to take 10 damage in 1 hit, you could expect 5 damage with unbreaking 3 on average. On Unbreaking 5, it would average 2 damage points.Then, on Difficulty 8, damage is x2, so you will instead take the original 10 damage.Again, EMC unbreaking is actually more powerful than Vanilla - The wiki is just flat out wrong.It's 75% * 40% = 30% for Unbreaking 3 in Vanilla. EMC Unbreaking 2 is actually more powerful than Vanilla 3.

No, it still completely ignore the enchantment.I changed my difficulty to 7 so there will not be 2x durability taken.Before I went to fight, my un-enchanted iron legging has 11 more durability than my unbreaking 3 diamond boot.After a fight, my iron legging still have 11 more durability than my diamond boot.(I hugged like 10 creeper)A creeper does 1-4 damage to armour.In EMC, you said my boot should only take about half of durability compared to my legging, because creeper does more than 1 damage to armour, it should work.But it is not true.