Blanket/afghan Phoenix

Interlocking filet crochet
(no explanation of the technique)

written out pattern (17 pages pdf file)
gridsize 120x160 windows

size depending on hook and yarn used:
hooksize H (5mm) 55-75 inch (140-200cm)
2700yards (2500m) needed per color
hooksize G (4mm) 43-55 inch (110-150cm)
2400yards (2200m) needed per color