zayood (!empty($user->lang['WROTE'])) ? $user->lang['WROTE'] : ucwords(strtolower(str_replace('_', ' ', 'WROTE'))):
Alright i've seen many people do this on my realm and my rl friend taught me how to do this.
Now here's the trick... ANYONE can do it and it's VERY easy

To do it in any class u must be able to go in through the 2nd kara door, the back door.
U can only get past that door if ur a rogue with shadow step.
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A little info on this one. As of the release of BWL, there is a bug in wow that lets u rez anytime u want, u can use this for ANY instance and not just BWL or Kara.
To do this, i suggest u stay naked.
Go in the instance, walk as far as u can and let the mobs kill u. When u die u get a msg saying "Release Spirit ?" Do not press anything. Type /logout and wait till the count down reaches 1 second then release ur spirit. U will get logged off eventually but when u go back into ur character, ur a ghost on top of ur body and can rez

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Now soloing chess event. U have to be able to go through the 2nd kara door and to do that i think u have to kill Maiden of Virtue. As a rogue, u can do this differently. U can just not have the door unlocked, target a rat on the other side and shadowstep. Now ur on the other side. Do what i described about rezzing urself after dying all the way to chess event.
Once u reach chess event u dont really need a grp, all u have to do is make mobs attack the enemie's healer then the king and voila ! U just soloed chess event.
Sry if i didnt describe this in detail but i hope everyone understood it.
I'll try getting pics of how it looks like when u go back on ur character.
I have 2 friends that have rogues and they did it to get these shoulders :
http://www.wowhead.com/?item=28755
it got nerfed. i think you need to kill the first boss or some more so that the chess peons will be visible.
i tryed some times with a raid composed with 3 people and nothing...they patched the instance servers for sure