Apologies if this is the wrong area for this, mods feel free to relocate... I'm going to be starting a Call of Cthulhu 7th edition game shortly and I was tinkering to see how to do bonus and penalty dice. The trick is you want to roll multiple occurrences of the tens digit and just one of the ones digit. As far as probability goes I'm pretty sure just doing multiple d100 rolls and keeping either the lowest or highest would give the same probability as keeping the highest or lowest tens digit. However I wanted to see if I could figure out how to do it "by the book". The short version showing : /r ((3d10kh1)-1)*10 + (1d10-1) The d10-1 gives 0 to 9. So 3d10kh1 is keep the highest out of 3 (so that'd be two penalty dice). Subtract one to get 0 to 9 and then multiply by ten. Then roll 1d10 (subtracting 1) and add it to the tens digit. To keep the lowest you'd just use kl instead of kh above. I might try my luck at tweaking the community character sheet to see if I can figure out a way to have options for rolls having penalty or bonus dice.
