Most common rules mistakes:

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**Christopher300**

Placing of fortifications while deploying your army.

There are separate rolls to decided who has which side and who goes/deploys first. I think this can make a difference I reckon at times.
I often forget about my grenades.

I always forget about precision shots from my sergeants both from shooting and in combat.

I always find that Look out sir rolls are f=often done the wrong way around i.e. after an armour save rather than before armour saves. And its always the thing that people realise they have done wrong straight away and then there is like an awkward, ah well go on ha

**conker249**

Happyjew wrote:
conker249 wrote:
There are a few references to a "one always fails". Here is a few I found

pg 13 under roll to hit, "roll of 1 always misses"
pg 14 roll to wound says "a roll of one always fails"
pg 19, under maximum save "a roll of one always fail"

Which are specifics. I've had people claim (and this also came up recently in YMDC), Servo-harness + 3 Servitors (+4 bonus to BotO) still needed a 2+ as a 1 always fails.

Main reason I labeled those as references. I can't find anything to prove the servo harness/3servitor theory wrong, as there is nothing saying that they would fail on a 1. Since the only references are to hits, to wound, and saves.

**Happyjew**

conker249 wrote:
Happyjew wrote:
conker249 wrote:
There are a few references to a "one always fails". Here is a few I found

pg 13 under roll to hit, "roll of 1 always misses"
pg 14 roll to wound says "a roll of one always fails"
pg 19, under maximum save "a roll of one always fail"

Which are specifics. I've had people claim (and this also came up recently in YMDC), Servo-harness + 3 Servitors (+4 bonus to BotO) still needed a 2+ as a 1 always fails.

Main reason I labeled those as references. I can't find anything to prove the servo harness/3servitor theory wrong, as there is nothing saying that they would fail on a 1. Since the only references are to hits, to wound, and saves.

Right, I've had people argue that no matter what you are rolling for a "1" always fails.

**ThunderFury 2575**

Assaulting after firing rapid fire weapons at close range :L Not particularly proud of some of those moments, because its kind of a bad example when i'm showing people how to play the game

**Kangodo**

I had a period where I always forgot Red Thirst.
Likewise my opponent always forgets his Waagh!.

I think the rules for buildings and ruins are common mistakes, but that's because I get a mental breakdown when trying to decipher them

Happyjew wrote:
Right, I've had people argue that no matter what you are rolling for a "1" always fails.

Which is 'funny' since characteristic-tests always fail on a 6 and are always a success on a 1.

**Happyjew**

Kangodo wrote:
I think the rules for buildings and ruins are common mistakes, but that's because I get a mental breakdown when trying to decipher them .

I don't think even GW knows how the rules for buildings are suppose to work.

**namiel**

I keep forgetting my ravenwing bikes are no longer fearless

**Sir Arun**

Let's not forget that Skyfire weapons arent just meant for flyers, but also for FMCs and skimmers of all sorts.

**PrinceRaven**

madric wrote:
That one is pretty simple luckily. Most ruins also come on a base, which counts as area terrain. When determining cover, only the best available cover is used. So if one has not gone to ground, then the choice is between 5+ area terrain or 4+ ruins, thus the 4+ is the better cover. When a unit goes to ground, the options are 3+ area terrain (5+ with +2 cover bonus for going to ground in area terrain), or 3+ ruins (4+ with +1 cover bonus for going to ground), thus the best cover save is 3+ (same for area terrain or ruins).

The most common mistake is for people to apply the +2 cover bonus from area terrain on top of the 4+ ruins cover save and they claim a 2+ cover save. I have no idea why this misconception is so frequent, but I do know that people will do the mental equivalent of what a contortionist does when they think they can gain an advantage.

People thinking the going to ground bonus in area terrain only applies when you take your cover save from the area terrain, run into that one a lot

Also, people seem to think that getting cover saves works differently for Flyers and FMCs, and that Flyers aren't subject to the same vertical firing arc restrictions as other vehicles.

Apart from those 2, it's mostly rules that changed from 5th to 6th, lots of people are still in the 5th ed mindset for some rules.

**MrFlutterPie**

Kangodo wrote:
I had a period where I always forgot Red Thirst..

I wish women would forget this rule as well...

**Experiment 626**

Vs. my friend's Dark Angels are we were still grappling with the new rules; forgetting that Slow & Purposeful don't get to fire Overwatch...

I felt bad since my lone Oblit nailed Azreal in the face with a meltagun. But then that was the only thing he managed to even hit all game with his shooting, so it was actually rather funny at that point!

**Phanixis**

The worst problems I have encountered involve the 50% rule for vehicles and MC in 5e and the 25% rule for vehicles in 6e. Not only will people try to claim cover for vehicles because they are in area terrain or behind some infantry or low lying area terrain, but often they will stubbornly insist they are right when I try to correct them. I have even had to call in tournament organizers over disputes caused by these rules.

**techsoldaten**

Artefacts. I personally take a bunch on my CL and just have this bad feeling I should only be taking one.

**Sikamikanic0**

MY SKULLBEARERS chapter follows the imperial fists chapter tactics... the problem is that half of my games i forget them... so my chapter has no tactics at all!!!

**PredaKhaine**

Warlord traits. You can't beat remembering them and rolling on turn 3

**sierra 1247**

I always forget my grenades, the red thirst and now i always forget the extra d6 for armour pens with meltas...
Not just that but i can sometimes forget the additional order that can be issued when you roll a double 1..

**mrwhoop**

I keep having to reread the USRs as to which changed or stayed the same. Like Furious Charge on disordered charges

Poor orks

**Valkyrie**

When I first started 40k I first thought that a shot that would inflict Instant Death would also ignore armour saves. My Terminators would get no save against a S8 Ap3 Battle Cannon, until the mistake was quickly pointed out.

Stealth and Shrouded often get mixed up, which one provides the +2 bonus, etc.

I also sometimes forget to roll for Chaos Boons whenerver my Champions kill another Character.

**rigeld2**

FMCs getting cover while "flying" over terrain (ie - the model is in area terrain). At least every other game someone calls me out on that.
"Lemme roll my cover save."
"Oh yeah - diving. Good call."
"Nah, that'd be dumb. I'm in a forest."
"YOU CAN'T DO THAT." (always emphatic)
"No, actually - here's the rules for area terrain saying that models inside get a 5+, here's the rules for MCs that don't change that, here's the rules for FMCs that don't change that. So I can." <roll, get a 3, FMC dies anyway>

**General Annoyance**

Valkyrie wrote:
When I first started 40k I first thought that a shot that would inflict Instant Death would also ignore armour saves. My Terminators would get no save against a S8 Ap3 Battle Cannon, until the mistake was quickly pointed out.

Stealth and Shrouded often get mixed up, which one provides the +2 bonus, etc.

I also sometimes forget to roll for Chaos Boons whenerver my Champions kill another Character.

I had a similar thing with Instant Death, except I used to believe that if you hit with an ID weapon, you had to instantly remove the model

.

Not having had many 6ed games, I often forget to do (or bother with) warlord traits, and sometimes forget rules like precision shots/strikes and the ability to challenge.

**Kaptain Skullstompa**

If you are in area terrain gtg is +2, also when a vehicle is wrecked it can be a crater (5+) or battlefield debris (4+) at my LHS you can only count is as debris if you actually build a seperate "wrecked vehicle" template, like a few vehicle bits on a base the size of the vehicle

**rigeld2**

Kaptain Skullstompa wrote:
If you are in area terrain gtg is +2, also when a vehicle is wrecked it can be a crater (5+) or battlefield debris (4+) at my LHS you can only count is as debris if you actually build a seperate "wrecked vehicle" template, like a few vehicle bits on a base the size of the vehicle

You're only allowed to treat it as a 4+ if you ignore the rules.

Wrecked vehicles are left on the table and effectively become a piece of terrain (conferring a 5+cover save), counting as both difficult and dangerous terrain.

You're trying to use the Wreckage/Rubble Battlefield Terrain with no permission to do so - that'd be against the rules.

Please don't confuse house rules with "most common rules mistakes"

**Dantioch**

Haing played tau for a couple of months now and I still can't remember that my commander has the neuroweb system jammer, out of a score of games I've only remembered to use once.

**MadmanMSU**

BRB page 99. Can units move through walls and/or closed doors and/or windows etc.?

Irony of this rule being that there is no hard and fast "rule", page 99 simply says work it out before the game starts with your opponent.

Try doing that at a tournament for loads more fun.

**rigeld2**

It does say that the default assumption is that you can. Meaning if you don't discuss it at the beginning, there's no reason to say "you can't do that" in the middle of the game.

**reiner**

I always forget to invoke Fear checks. With all of the models that I field with Fear, you would think i would remember, but noooo

**rigeld2**

That and Hammer of Wrath.

... although thanks for reminding me that I forgot Fear this past weekend.

**Wilytank**

For the longest while, everyone in my meta was using the old reserve rules. Until I pointed it out just a month ago.

Automatically Appended Next Post:
There's also a couple of people who think that lack of line of sight can buff cover saves. "You can only see his head. 2+ cover."

**SBG**

Wilytank wrote:

There's also a couple of people who think that lack of line of sight can buff cover saves. "You can only see his head. 2+ cover."

If I'm not mistaken, you get a flat cover save of 5+, followed by only being able to remove models that are actually visible, correct? Just making sure we're playing it right.

**Happyjew**

SBG wrote:
Wilytank wrote:

There's also a couple of people who think that lack of line of sight can buff cover saves. "You can only see his head. 2+ cover."

If I'm not mistaken, you get a flat cover save of 5+,

Not quite. It usually is 5+ but some things can provide a static cover save that is better (such as Ruins).

followed by only being able to remove models that are actually visible, correct? Just making sure we're playing it right.

This part is also correct, however blast and barrage can get around this.