Here's a video walkthrough of 3-11 through 3-15: http://www.rovio.com/index.php?page=angry-birds-walkthrough-videos#3_11_15 direct link to just that video
gaming.stackexchange.com/users/12/Jeff Atwood
Youtube has a bunch of these:
This is the "Official Angry Birds 3 Star Walkthrough Theme 3 Levels 11-15" A description of what occurs in the video: 1.
Fire black bird at gap between concrete levels 3 and 4 (one above first die).2.
Black bird explodes on top of second tall wood column.
Second pig is destroyed.3.
Fire white bird on slightly higher trajectory, dropping egg between third and fourth (now second and third) pigs, destroying both.4.
Fire second white bird on lower trajectory, dropping egg between first (and only) remaining pig and die, destroying both.
Total points in example video: 56460 .
★★★
gaming.stackexchange.com/users/406/ebynum
Aim the black bird at the row just under the first dice and DON'T explode him.
If you hit it right he will explode and take out 3 of the pigs.
Then you are left with the two white birds to get the last pig on the end.
gaming.stackexchange.com/users/1781/Ruthie
Rovio has walkthroughs on YouTube:
gaming.stackexchange.com/users/1776/Dave Cowart
It's not as daunting as it looks, actually.
Your exploding bird must land in amongst the concrete directly above the second pig from the left (about halfway up the structure).
When it explodes it will take out the first three pigs in one hit.
Remember that you can pre-detonate a bomb bird even after it's landed and gone red to time your ordnance perfectly.
This leaves your MOAB birds to clear the smashed and fallen masonry from above the last pig and let the shockwave from the last one kill the porker.
Good luck!
gaming.stackexchange.com/users/None/
You can get three with the black one if you aim it at the 2nd level, then the White birds to drop bombs on the last remaining bird/s :-)
gaming.stackexchange.com/users/None/
I can't get past this level in Angry Birds. All I get is one black exploding bird and two white bomber birds:   I can use the black bomber to kill the left two pigs, but after that there's such a big pile of concrete on top of the other pigs that nothing I try gets through.
How can I beat level 3-15 in Angry Birds?
gaming.stackexchange.com
<angry-birds>
gaming.stackexchange.com/questions/3748
gaming.stackexchange.com/users/230/Joel Spolsky
Aim at the black bird and you can get three with the black one if you aim at the second level. It must land in amongst the concrete. Aim the black bird at the second level under the first dice, and it will take out three pigs.
Users provide instructions on how to take out multiple pigs with the black bird.