k: knit | p: purl | st(s): stitch(es) | R: row | Incr.: increase
pm/slm: place marker/slip marker
WS: wrong side facing
sl1: slip a st from left needle to right needle without working
p2tog: p next 2sts together to create one (right leaning decrease)
yo: yarn over, starting at front of work pass yarn over needle to back. If st before yo was a k st, bring yarn to front underneath needle. If st after yo is a p, then bring yarn forward under needle. When you reach this yo on next row, k or p it as directed. This should create a hole.
kfb: k into front and back of st, creating two sts out of one.