What does this mean

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Avatar of ntt168

when i play live chess with some player, i see rate "10 5 u or 30 0 u". I only knew that 10 mean time of game.  Pl telll me more about the what does number mean

Avatar of manny13

the number after represent an increment of that much (in seconds) after each move. the u states that the challenge is an unrated one. no rating changes will be made after that game. 

Avatar of wowiezowie

It's call the fischer clock, the second number is the time in seconds added to your clock each time you make a move...

Avatar of ntt168

Thank you