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Written by the people who build a pattern planner, which mostly means these pages are about the two things a planner spends its life on: what a pattern actually says, and why the piece did not come out like the picture.
How to read a crochet patternThe grammar rather than the abbreviations: which bracket means repeat, which number is a count, and how to use the number at the end of a round as the error check it was written to be.Crochet abbreviationsrep, rnd, ch-sp, tog, BLO, tch — the vocabulary a pattern assumes you already have, which every other abbreviation chart leaves out in favour of the stitches.Why your amigurumi came out wrongPointy, flat, lumpy, full of holes, or leaning. Seven things go wrong and most have one cause each — and two of them are arithmetic wearing a disguise.
The free tools do the arithmetic these pages describe, and the pattern gallery is somewhere to practise reading one.