From an EBay listing for a kit to knit this pattern:
“The Ribbed Check pullover is timeless, with deep jewel-toned colors and a simple slip stitch pattern that mimics fair isle knitting without the need to carry two colors in a row. Suitable for anyone who can do simple shaping the pattern is rated “easy” - straightforward knitting. The loose fitting jumper features drop shoulder sleeves and a deep ribbed collar.“