How do you test if score A is larger than Score B (different scoreboard objectives)?

Question

I am working on a LVL requirement system, and to do that I need to be able to compare 2 scoreboard objectives. I have been playing around with some ideas and I am still unsure on how to do it. If you can help me that would be great!

So basically I am trying to test if a player is holding an item with custom NBT that sets a higher level (achieved through a scoreboard command) than the players set LVL (again a scoreboard). I have tried /scoreboard players operation @p[Score_Tested_min=1] LVL1 -= @p[Score_Tested_min=1] lvl1 Obviously it would be hard to explain the complicated setup I have. But basically LVL1 and lvl1 are based on other objectives and the tested thing is a selector so it only works on one player per a tick.

Answer 1

So basically, you have a command that makes 2 scores identical and a score you want to subtract:

/scoreboard players operations (player1) (objectiveA) = (player2) (objectiveB)

(note player one and player two don't have to be different)

Next you would want a command that you subtract from (objectiveB):

/scoreboard player operations (player2) (ObjectiveB) -= (player2) (objectiveC)

Then you have a player selector in the next command. For instance:

/effect @p[score_Output_min=1] minecraft:slowness (time) (amplifier)

and that will show it is working right if you do the same general outline of what I did. Hope this helps. Just heads up this gets complicated real quick and it took me forever to figure out what i did wrong. I hope this helps you understand and recreate the idea if you need it.

Answer 2

Maybe a little late, but in the new 1.13 commands, target selectors support ranges. So after you've done the substraction, and gave the player that should be affected the substracted score, you can use scores={(your score)=1..} for greater than, and instead of 1.. ..-1 for less than in the target selector...