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Message: <blockquote data-quote="Petrosian" data-source="post: 861317" data-attributes="member: 1149">Sigh...Ok one more time...the fact that a d20 is as likely to roll a 1 as a 20 or that 2d10 makes an 11 more likely than a 2 is IREELEVENT to the predictability of RESULTS. In both cases, it is the die roll probabilties AND the value the system places on those results tat matters.If i want it to be approximately 60% likely to succed on 3d6 i assing the succes to 11-. If i want ~60% on a d20 i assign 12-. In both systems i can assign the ranges of success and failure to make the outcome as likely as i want.The only difference is, with bell curves the difference between X and x+1 and x+2 is variable, not static. That means a +2 range penalty might mean a 10% reduction or it might mean a 20% reduction and so forth, depending on what value X is. That complicates the valuation of modifiers. You seem to be thinking of replacing the 1d20 with 2d10 and keeping the same success/failure assignments you had with 1d20? that isn't fixing the results its skewing them.YMMV.</blockquote>