Suma 4 system · Drill cards

Corner: Start + Aim = 4 · Aim = Arrival − Start (two numberings — see variants)

Start 2, Arrival 4Arrival: 4Arrival: 0Start: 2Start: 0Aim: 2Start + aim is counted diamond by diamond up to 4: 2 + 2 = 4 → Aim 2.

Start 3, Arrival 6Arrival: 6Arrival: 0Start: 3Start: 0Aim: 23 + 1 = 4 (1 diamond); after 4, each half diamond +1: 1.5 → 5, 2 → 6. Aim 2.

Start 3, Arrival 5Arrival: 5Arrival: 0Start: 3Start: 0Aim: 1.53 + 1 = 4, one more half diamond → 5. Aim 1.5.

Start 7, Arrival 8Arrival: 8Arrival: 0Start: 7Start: 0Aim: 0.5For a start of 4 or more, each half diamond from the corner is +1: 7 + 1 = 8 → Aim 0.5.

Start 4, Arrival 7Arrival: 7Arrival: 0Start: 4Start: 0Aim: 1.54 + 3 half diamonds = 7 → Aim 1.5.

Reference position: Start 3, Arrival 5Arrival: 0Arrival: 5Start: 0Start: 3Aim: 2Aim = 5 − 3 = 2.

Start 0, Arrival 4 (corner)Arrival: 0Arrival: 4Start: 0Start: 0Aim: 4Basic path: Start + Aim = 4 → Aim = 4 − 0 = 4.

Start 2, Arrival 6Arrival: 0Arrival: 6Start: 0Start: 2Aim: 4Aim = 6 − 2 = 4.

Start 1, Arrival 4.5Arrival: 0Arrival: 4.5Start: 0Start: 1Aim: 3.5Aim = 4.5 − 1 = 3.5.