Checkerboard Mesh

Knitted in a multiple of 10, +4 sts and 20-row repeat.
Row 1 and all wrong side: Purl all sts.
Row 2 (RS): K4, * yo, ssk, k1, (k2tog, yo) 2 times, k3; rep from * to end.
Row 4: K3, * (yo, ssk) 2 times, k1, k2tog, yo, k3; rep from * to last st, k1.
Row 6: K2, * (yo, ssk) 3 times, k4; rep from * to last 2 sts, yo, ssk.
Row 8: K1, * (yo, ssk) 4 times, k2; rep from * to last 3 sts, yo, ssk, k1.
Rows 10: As Row 6.
Rows 12: As Row 4.
Rows 14: As Row 2.
Row 16: K2tog, yo, * k4, (k2tog, yo) 3 times; rep from * to last 2 sts, k2.
Row 18: K1, k2tog, yo, * k2, (k2tog, yo) 4 times; rep from * to last st, k1.
Row 20: As Row 16.

Knitting abbreviations:
K: Knit | P: Purl | Yo: Yarn over | K2tog: Knit 2 sts together | Ssk: Slip slip knit.