IIRC, it means you can just draft 12 forwards, any position. When the sim was first built you had to draft four C, LW, RW each. But then of course you have lots of players listed as centers who actually played wing, or vice versa. And then we all figured out that outside of faceoff wins, the sim doesn't seem to care where you play your forwards. So at one point they introduced the "relaxed" option to just draft 12 Fs.