That uh was the original DSR iirc. If a stage was played on during a set, neither player could re-pick it for the entire set regardless of win-lose status. Opponent beats you on FD, FD is removed for the entire set for both players.
Most common version is the Winner's version: any stage you have won on during the set is off limits to your picking. I think this version is 100% fine for PM due to our stage size.
Winner DSR helps balance some MU's where the player can't ban enough of the bad stages. Take Bowser vs someone strong on long stages who wrecks Bowser. Bowser can ban Delfino and maybe PS2 or something? This would leave FD or something similar open. No matter how you allocate your bans, if there's no DSR applied, the other person can keep CPing FD. If you switch bans next match to ban FD, then he gets to go after one of your prior banned stages that isn't banned anymore (say Delfino for example). With DSR, I get FD CP and from there I have to settle for a less lethal CP (which seems like a fair compromise if we value stage diversity + making CP process not entirely 80-20 MU swings repeatedly)
If characters are locked before stages, this is even more true because there's no guessing required on Bowser's opponent for what character he might pick. In traditional format, if I tried to abuse a Bowser player with a no DSR ruleset, he could simply switch characters after I picked stage. I keep trying to pick FD or Delfino, he switches characters. If he locks into Bowser first however, the ambiguity is gone and you can simply brute force the stage list multiple times.
Most common version is the Winner's version: any stage you have won on during the set is off limits to your picking. I think this version is 100% fine for PM due to our stage size.
Winner DSR helps balance some MU's where the player can't ban enough of the bad stages. Take Bowser vs someone strong on long stages who wrecks Bowser. Bowser can ban Delfino and maybe PS2 or something? This would leave FD or something similar open. No matter how you allocate your bans, if there's no DSR applied, the other person can keep CPing FD. If you switch bans next match to ban FD, then he gets to go after one of your prior banned stages that isn't banned anymore (say Delfino for example). With DSR, I get FD CP and from there I have to settle for a less lethal CP (which seems like a fair compromise if we value stage diversity + making CP process not entirely 80-20 MU swings repeatedly)
If characters are locked before stages, this is even more true because there's no guessing required on Bowser's opponent for what character he might pick. In traditional format, if I tried to abuse a Bowser player with a no DSR ruleset, he could simply switch characters after I picked stage. I keep trying to pick FD or Delfino, he switches characters. If he locks into Bowser first however, the ambiguity is gone and you can simply brute force the stage list multiple times.
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