The second number is increment ie. That number of seconds added to your time after each of your moves. So 15/5 is 15 minutes for the whole game plus 5 seconds increment per move.
Please explain 3|1 etc
Yes my friend you are right....in 3/1...the 3 is the fixed minutes while the 1 is the 'bonus' added after each move...this is called the FISHER TIME system.....
On live chess, what is 15|5, 5|5 & 3|2. I see the choices for 1 minute, 3 minutes, 5 minutes, etc but do not understand the other notations. Can anyone help? Thanks!