In the absence of anyone to tell you how this works, here goes.
Normally there are 6 people in a group in an IRR. Each person makes a centre block and sends it to the next person to put a border on, it then gets sent on to the next and so forth. Meanwhile you are receiving blocks from the other people and eventually you get your own block back, Makes sense ?
However you will have to wait to see if there are any more places left in this IRR, its not up to me.
Elle