ZDP (ZA Dota Points) is a public performance score separate from the balance rating used internally to make fair teams.
Win → +25 ZDP. Lose → −25 ZDP. Zero-sum per match.
Underdog bonus: if your team's average Base MMR is 75+ below the enemy, a win is worth +35 ZDP.
Overlord penalty: if your team is 75+ MMR ahead and you lose, it costs −35 ZDP.
Standings rank = net wins (W − L). Ratings rank = Base MMR + ZDP.