Alright so this are the tabs for Widower from The Dillinger Escape Plan.
I learned this song by ear so i'm trying to be as accurate as possible.

x=dead note
pm=palm mute
*=repeat

So chorus is manly based around this chord:

E|-10-|
B|-9-|
G|-0-|

The verses go a little like this:

E|------------------------------------|
B|------------------------------------|
G|------------------------------------|
D|-3-555-3-555-3-555-3-555-3-555-3-555|
A|------------------------------------|
E|------------------------------------|
pm-------------------------------------

Then the song starts getting steadily heavier:

E|------------------------------------------------------------|
B|------------------------------------------------------------|
G|------------------------------------------------------------|
D|-5-5-5-5-5-55xx5-5-5-5-5-55xxx5-5-5-5-5-55xxx5-5-5-5-5-55xxx|
A|-5-5-5-5-5-55xx5-5-5-5-5-55xxx5-5-5-5-5-55xxx5-5-5-5-5-55xxx|
E|-3-3-3-3-3-33xx3-3-3-3-3-33xxx3-3-3-3-3-33xxx3-3-3-3-3-33xxx|

E|------------------------------------------------------------|
B|------------------------------------------------------------|
G|-6-6-6-6-6-66xx6-6-6-6-6-66xxx6-6-6-6-6-66xxx6-6-6-6-6-66xxx|
D|-6-6-6-6-6-66xx6-6-6-6-6-66xxx6-6-6-6-6-66xxx6-6-6-6-6-66xxx|
A|-4-4-4-4-4-44xx4-4-4-4-4-44xxx4-4-4-4-4-44xxx4-4-4-4-4-44xxx|
E|------------------------------------------------------------|

E|---------------------------------------------|
B|---------------------------------------------|
G|---------------------------------------------|
D|-5-5-5-5-5-55xxx6x6x6x6x5-5-5-5-5-55-6xxxx666|
A|-5-5-5-5-5-55xxx6x6x6x6x5-5-5-5-5-55-6xxxx666|
E|-3-3-3-3-3-33xxx4x4x4x4x3-3-3-3-3-33-4xxxx444|
                pm--------

E|------------------------------------------------------------|
B|------------------------------------------------------------|
G|-6-6-6-6-6-66xx6-6-6-6-6-66xxx6-6-6-6-6-66xxx6-6-6-6-6-66xxx|
D|-6-6-6-6-6-66xx6-6-6-6-6-66xxx6-6-6-6-6-66xxx6-6-6-6-6-66xxx|
A|-4-4-4-4-4-44xx4-4-4-4-4-44xxx4-4-4-4-4-44xxx4-4-4-4-4-44xxx|
E|------------------------------------------------------------|

After this, comes the climax of the song which goes like this:

E|*---------------------------------------------------|
B|*---------------------------------------------------|
G|*---------------------------------------------------|
D|*-3-3-3-3-3-3-3-3-3-3-2-3-5-6-6-6-6-6-6-6-6-6-6-6-6-|
A|*-3-3-3-3-3-3-3-3-3-3-2-3-5-6-6-6-6-6-6-6-6-6-6-6-6-|
E|*-1-1-1-1-1-1-1-1-1-1-0-1-3-4-4-4-4-4-4-4-4-4-4-4-4-|

The numbers that are together are 11, 10, and 13.

E|---------------------------------------------------*|
B|---------------------------------------------------*|
G|---------------------------------------------------*|
D|1111111111111111111113-11108-8-8-8-8-8-8-8-8-8-8-8-*|
A|1111111111111111111113-11108-8-8-8-8-8-8-8-8-8-8-8-*|
E|9-9-9-9-9-9-9-9-9-9-11-9-8-6-6-6-6-6-6-6-6-6-6-6-6-*|

The after this, the piano part goes around this chord and so does the ending:

D|-5-|
A|-5-|
E|-3-|