50 percent system (short–long–short) · Drill cards

Aim = Start × Arrival (in the spin variant: Aim = Start × (Arrival − Spin))

Reference position: Start 3, Arrival 7Spin (running): 0Start: 3Arrival: 7Arrival: 0Aim: 21Spin 0: Aim = 3 × 7 = 21.

Start 3, Arrival 8, spin 1Spin (running): 1Start: 3Arrival: 8Arrival: 0Aim: 21The same aim (21) arrives at 8 with spin 1: Aim = 3 × (8 − 1) = 21.

Start 4, Arrival 5.5Spin (running): 0Start: 4Arrival: 5.5Arrival: 0Aim: 22Aim = 4 × 5.5 = 22.

Start 2.5, Arrival 8.5, spin 2Spin (running): 2Start: 2.5Arrival: 8.5Arrival: 0Aim: 16.25Aim = 2.5 × (8.5 − 2) = 16.25.

Start 6 (short cushion), Arrival 5.5Spin (running): 0Start: 6Arrival: 5.5Arrival: 0Aim: 33Aim = 6 × 5.5 = 33.

Start 3, Arrival 7Spin (running): 0Start: 3Arrival: 4Arrival: 7Aim: 21Aim = 7 × 3 = 21.

Start 4, Arrival 5Spin (running): 0Start: 4Arrival: 4Arrival: 5Aim: 20Aim = 5 × 4 = 20.

Start 3.5, Arrival 9Spin (running): 0Start: 3.5Arrival: 4Arrival: 9Aim: 31.5Aim = 9 × 3.5 = 31.5.

Start 5 (corner), Arrival 4.5Spin (running): 0Start: 5Arrival: 4Arrival: 4.5Aim: 22.5Aim = 4.5 × 5 = 22.5.