Minecraft – How to get /testfor to only find one player with a score value

You can use scoreboard in player selectors to find out which one they clicked. Usually this is done by either testfor or execute.

I recommend a 20 t/s clock to check these as soon as they click it. You don't have to use one, but it may help. great method to setup one.

In the case of testfor, it is actually not recommended to use it. You can't exactly distinguish which player clicked it, you just know that it was clicked. A better way is the execute method. Never-the-less, the command should look like this:

Testfor @a[score_test=1,score_test_min=1]

You will need a comparator to get if it succeeded to find it. You should also have a separate command block for each, then change the 1 to another number for each possible outcome.

In the case of execute: recommended method. You can use @p in the command part to target that specific player. Command as follows:

Execute @a[score_test=1,score_test_min=1] ~ ~ ~ <command>

For this, you should set their score of that to 0 as soon as the command is run, otherwise that command may be run twice.

If your map is not going to be multiplayer, you may want to consider tracking if each zombie spawned is alive by attempting to execute commands on them and checking if said commands succeed.

Another solution, which I think is probably the best, is to implement custom loot from the different zombies that you spawn, perhaps paper or gold that is renamed to different values, or just different drops from each enemy, that are then automatically cleared from the players' inventories in exchange for scoreboard points.