Here is the exact game loop. If you want to re-implement or port the game, this can be used as reference.
stamina1 ← 600
stamina2 ← 600
loop until (stamina1 equals zero) and (stamina2 equals zero) :
force1 ← get from bot1
force2 ← get from bot2
force1 ← truncate(force1)
force2 ← truncate(force2)
force1 ← maximum(1,force1)
force2 ← maximum(1,force2)
force1 ← minimum(stamina1,force1)
force2 ← minimum(stamina2,force2)
if (force2 equals zero) : force1 ← 1
if (force1 equals zero) : force2 ← 1
if (force1 equals force2) :
stamina1 ← stamina1 - 1
stamina2 ← stamina2 - 1
else :
stamina1 ← stamina1 - force1
stamina2 ← stamina2 - force2
if (force1 greater than force2) :
stamina1 ← stamina1 + 1
bot1 wins ball
if (force2 greater than force1) :
stamina2 ← stamina2 + 1
bot2 wins ball
State transitions:
winner loser winner loser winner loser
point point point point game game
Love Love → 15 Love . .
Love 15 → 15 15 . .
Love 30 → 15 30 . .
Love 40 → 15 40 . .
15 Love → 30 Love . .
15 15 → 30 15 . .
15 30 → 30 30 . .
15 40 → 30 40 . .
30 Love → 40 Love . .
30 15 → 40 15 . .
30 30 → 40 30 . .
30 40 → Deuce Deuce . .
40 Love → Love Love +1 .
40 15 → Love Love +1 .
40 30 → Love Love +1 .
Deuce Deuce → Advantage - . .
- Advantage → Deuce Deuce . .
Advantage - → Love Love +1 .