Reverse Spin (Contraefecto) · Drill cards

Aim = Start + Arrival / 2 (± compensation)

Start 40, Arrival 10Arrival: 10Start: 40Aim: 45Start 40, Arrival 10: 40 + 10 / 2 = 40 + 5 = 45. No compensation. Maximum spin (4).
Start 30, Arrival 16 (−2)Arrival: 16Start: 30Aim: 36Start 30, Arrival 16: 30 + 16 / 2 = 30 + 8 = 38. Long-cushion compensation (−2) → 38 − 2 = 36. Maximum spin (4).
Start 70, Arrival 20 (+3)Arrival: 20Start: 70Aim: 83Start 70, Arrival 20: 70 + 20 / 2 = 70 + 10 = 80. Short-cushion compensation (+3) → 80 + 3 = 83. Maximum spin (4).