this is a catchy song and SOAD rule, so here goes
CGCFAD tuning, asterixs mean repeat the measure
|------------------------|-----------------------|
|------------------------|-----------------------|
|5--5-5-5-5--5-5-5-5--5-5|5/7---7-7-7-7--7-7-7-7-|
|7--7-7-7-7--7-7-7-7--7-7|7/9---9-9-9-9--9-9-9-9-|
|0--0-0-0-0--0-0-0-0--0-0|0-0---0-0-0-0--0-0-0-0-|
|------------------------|-----------------------|
Riff 1
|--------------------|-------------------|
|--------------------|-------------------|
|4--4-4-4-4--4-4-4-4-|2--2-2-2-2--2-2-2-2|
|5--5-5-5-5--5-5-5-5-|3--3-3-3-3--3-3-3-3|
|0--0-0-0-0--0-0-0-0-|0--0-0-0-0--0-0-0-0|
|--------------------|-------------------|
|------------|-----------|-----------|-----------|
|------------|-----------|-----------|-----------|
|-5---5---5--|7---7---7--|4---4---4--|2---2---2--|
|---7---7---7|--9---9---9|--5---5---5|--3---3---3|
|------------|-----------|-----------|-----------|
|------------|-----------|-----------|-----------|
Riff 2
|-/8--|/10-|-7-|-12-|-12-|-13-|-10-|-13-|
|-/10-|/12-|-8-|-13-|-13-|-15-|-12-|-15-|
|-----|----|---|----|----|----|----|----|
|-----|----|---|----|----|----|----|----|
|-----|----|---|----|----|----|----|----|
|-----|----|---|----|----|----|----|----|
Riff 3 strum each chord 16 times every measure
|----------|-------------|---------------------------------|
|----------|-------------|---------------------------------|
|*---------|------------*|*--------------------------------|
|*---------|------------*|*--------------------------------|
|-7h8--6h7-|-9h10--11h12-|---------------------------------|
|-7h8--6h7-|-9h10--11h12-|-7-7-7-7-7-7-7-7-6-6-6-6-6-6-6-6-|
Riff 4 hammer-on 4 times. (this riff is played
----------------------------------------|
----------------------------------------|
---------------------------------------*|
---------------------------------------*|
----------------------------------------|
9-9-9-9-9-9-9-9-12-12-12-12-12-12-12-12-|
right before the first verse)
|-----------------------|-------------------------|
|-----------------------|-------------------------|
|*----------------------|------------------------*|
|*----------------------|------------------------*|
|-7h8---7h8-7h8-7h8-7h8-|--6h7---6h7-6h7-6h7-6h7--|
|-7h8---7h8-7h8-7h8-7h8-|--6h7---6h7-6h7-6h7-6h7--|
Riff 5 played during the verses (repeat as necessary)
[ Tab from: https://www.guitartabs.cc/tabs/s/system_of_a_down/chop_suey_tab_ver_17.html ]
|--------|-------|-------|--------|
|--------|-------|-------|--------|
|*-2-----|-------|-5-----|-------*|
|*-2-----|-3-----|-5-----|-3-----*|
|--0-----|-3-----|-3-----|-3------|
|--------|-3-----|-------|-3------|
Riff 6
"...why have you forsaken me, in your eyes forsaken me, in your thoughts..."
Riff 6 is played as the outro. Repeat this until end of song-0-0--0-0-0-0-|
|------------------------|-----------------------|
Riff 1
|--------------------|-------------------|
|--------------------|-------------------|
|4--4-4-4-4--4-4-4-4-|2--2-2-2-2--2-2-2-2|
|5--5-5-5-5--5-5-5-5-|3--3-3-3-3--3-3-3-3|
|0--0-0-0-0--0-0-0-0-|0--0-0-0-0--0-0-0-0|
|--------------------|-------------------|
|------------|-----------|-----------|-----------|
|------------|-----------|-----------|-----------|
|-5---5---5--|7---7---7--|4---4---4--|2---2---2--|
|---7---7---7|--9---9---9|--5---5---5|--3---3---3|
|------------|-----------|-----------|-----------|
|------------|-----------|-----------|-----------|
Riff 2
|-/8--|/10-|-7-|-12-|-12-|-13-|-10-|-13-|
|-/10-|/12-|-8-|-13-|-13-|-15-|-12-|-15-|
|-----|----|---|----|----|----|----|----|
|-----|----|---|----|----|----|----|----|
|-----|----|---|----|----|----|----|----|
|-----|----|---|----|----|----|----|----|
Riff 3 strum each chord 16 times every measure
|----------|-------------|---------------------------------|
|----------|-------------|---------------------------------|
|*---------|------------*|*--------------------------------|
|*---------|------------*|*--------------------------------|
|-7h8--6h7-|-9h10--11h12-|---------------------------------|
|-7h8--6h7-|-9h10--11h12-|-7-7-7-7-7-7-7-7-6-6-6-6-6-6-6-6-|
Riff 4 hammer-on 4 times. (this riff is played
----------------------------------------|
----------------------------------------|
---------------------------------------*|
---------------------------------------*|
----------------------------------------|
9-9-9-9-9-9-9-9-12-12-12-12-12-12-12-12-|
right before the first verse)
|-----------------------|-------------------------|
|-----------------------|-------------------------|
|*----------------------|------------------------*|
|*----------------------|------------------------*|
|-7h8---7h8-7h8-7h8-7h8-|--6h7---6h7-6h7-6h7-6h7--|
|-7h8---7h8-7h8-7h8-7h8-|--6h7---6h7-6h7-6h7-6h7--|
Riff 5 played during the verses (repeat as necessary)
|--------|-------|-------|--------|
|--------|-------|-------|--------|
|*-2-----|-------|-5-----|-------*|
|*-2-----|-3-----|-5-----|-3-----*|
|--0-----|-3-----|-3-----|-3------|
|--------|-3-----|-------|-3------|
Riff 6
"...why have you forsaken me, in your eyes forsaken me, in your thoughts..."
Riff 6 is played as the outro. Repeat this until end of song
