This solid granny square starts from a double crochet circle and it has treble crochet with chain stitches at the corners. You will need to know how to make the basic crochet stitches like the chain (ch), double crochet (dc), treble crochet (tr) and slip stitch (sl) in order to crochet this solid granny square.
Via CraftPassion

Front Loop Treble Crochet Stitch
The Front Loop Treble Crochet Stitch is a variation of the treble crochet stitch also known as the front loop triple crochet stitch. For this crochet stitch, you will be inserting your crochet hook
Hexi Askew Square
This 12 (30.5 cm) square starts with a hexagon. Crossed double crochet and popcorn stitches add texture. This square was designed for the sixth annual Moogly Crochet Along. Skills Used Basic crochet
Lavender Fields Crochet Blanket Square
This crochet pattern creates a beautifully textured 12” crochet blanket square. Use shades of the same colour to create an ombre look, like in the sample picture or mix and match other colours to
Spring Is On The Way Square
"Invite the vibrant colors and textures of spring into your home with this floral granny square. Skills Used Basic crochet stitches: chain, single crochet, double crochet, half double crochet,
Berrylicious Square
This 12” (30.5 cm) square starts with a textured, berrylicious center and ends with one of my favorite crochet stitch patterns: the v-stitch! This pattern was designed for the 2019 Block a Week with