Grade my parlay — the AI parlay doctor

• The grade — A to F, off a score out of 100. It starts at 100 and comes down for the things that actually cost tickets
• The hold — the biggest deduction: the gap between what the parlay pays and what its real chance deserves. A wide gap is the book keeping more of your money
• Same-team legs — every extra leg from one team costs the score - two results that need the same afternoon to go one way are not two chances
• Leg count — past four legs each extra one costs; a long ticket is priced to lose
• Chalk — stacking heavy favourites pays little and still needs every one
• A 80-100 — green: nothing we would talk you out of
• B 65-79 — playable, with one thing worth fixing first
• C 50-64 — the shape is costing you
• D and F under 50 — the ticket is built against you

The doctor grades the SHAPE of a slip - the legs are still your picks, priced at the house price.