Reference line: 45 − 10 = 35Biais (slope of the line): 6Start: 45Arrival: 35Aim: 10The cue ball is near the start cushion. Arrival 35 on the 3rd cushion; the 45/10 line passes through the cue ball. Biais 6; no correction for a 3rd-cushion arrival.
Sancho System · Drill cards
Aim = Start − Arrival + (Biais − 6) × zone share
Cue ball in the middle of the table: 37 − 2 = 35Biais (slope of the line): 5Start: 37Arrival: 35Aim: 2The same arrival (35). The cue ball lies between the 35/0 and 40/5 lines; starting from 35/0, the pair is shifted to 36/1, 37/2. The 37/2 line passes through the center of the ball.
4th cushion, zone 4: 90 − 30 + 3 = 63Biais (slope of the line): 9Start: 90Arrival: 30Zone of ball 2: Zone 4 (near the 5th cushion): fullAim: 63Arrival 30 on the 4th cushion, ball 2 in zone 4. The biais of the 90/60 line is 9 → correction +3 applied in full: line 90/63.
4th cushion, zone 4: 30 − 25 − 2.5 = 2.5Biais (slope of the line): 3.5Start: 30Arrival: 25Zone of ball 2: Zone 4 (near the 5th cushion): fullAim: 2.5Arrival 25 on the 4th cushion. The biais of the 30/5 line is 3.5 → correction −2.5 applied in full: line 30/2.5.
Table test: 72 − 50 + 2 = 24Biais (slope of the line): 9Start: 72Arrival: 50Zone of ball 2: Zone 3: ⅔Aim: 24Start 72, arrival 50 on the 4th cushion. Biais 9 → +3; since ball 2 is in a zone near the middle, ⅔ of the correction (+2) is applied: aim 24.
Cue ball frozen to the cushion: 40 − 20 − 5 = 15Biais (slope of the line): 4.5Cue ball frozen to the start cushion: YesStart: 40Arrival: 20Aim: 15The cue ball is frozen to the start cushion, so maximum spin on the equator cannot be given. The aim is reduced by 5 and the shot is played with natural spin (1:30): aim 15 instead of 40 − 20 = 20.