Part 1
Begin knitting the sweater from the top to bottom. Cast on 36 sts.

1st row (right side) – sl.st.1, corner1, k2, corner1, k22, corner1, k2, corner1, k1
One repeat between corners is 4 sts.
2nd row and all even rows– sl.st.1, p to end
3rd row – sl.st.1, k1, corner1, [k2, yo, k2tog], corner1, [k2, yo, k2tog] x 6, corner1, [k2, yo, k2tog], corner1, k2
5th row – sl.st.1, k2, corner1, (k to corner, corner1) x 3, k3

Repeat the pattern starting from the 3rd row working more repeats between each corner.

7th row – sl.st.1, k3, corner1, ([k2, yo, k2tog] to corner, corner1) x 3, k4
9th row – sl.st.1, k4, corner1, (k to corner, corner1) x 3, k5, add 20 sts/loops

Begin knitting in the round. Use a marker.

1st round – k to end
Now use your first corner as a new starting point.
2nd round – (corner1, [k2, yo, k2tog] to corner) x 4
3rd round – k to end
4th round – (corner1, k to corner) x 4
5th round = 3rd round

Repeat the pattern starting from the 2nd round working more repeats between each corner. Work rounds increasing sts until your front and back parts will be wide enough for your chest circumference.

Abbreviations
[ ] – repeat
corner – yo, k2, yo
k – knit
k2tog – knit two sts together
p – purl
sl.st. – slip stitch (slide one loop from the left needle to the right one without knitting it)
st – stitch
yo – yarn over