Minecraft – /testfor in minecraft 14w11b (snapshot of 1.8)

minecraft-java-editionminecraft-redstone

I can't test for people's locations using @a[x=-563,y=4,z=23]. Instead, the redstone comparator will just turn on even if no one is at -563,4,23.

Try specifying a maximum search radius, for example:

@a[x=-563,y=4,z=23,r=1]

Note that you can use this shortcut:

@a[-563,4,23,1]

When you use a /testfor command, you can't use specific usernames to test for people on the server/world.

When testing for people with your score IsReady, use:

/testfor <selector(@p)>[score_IsReady=1]

So when someone is near by the commandblock, it will return true only if someone has IsReady=1.

When using coordinates, you need to specify a radius so that it knows how far to search from that specific point. Try changing your command to:

/testfor @a[x=-611,y=80,z=714,r=1]

You can also compact it down into:

/testfor @a[-611,80,714,1]

I believe that the reason is that without a radius the selector makes no sense, so it is simply ignored and tests for @a.