It occured to me out of the Blue today that I may be off track. If my 20 sided die is marked 0-19 then I'm ok but if its 1-20 then I'm off. (I'd look but the die in quest lives 75km away, where one day, with the favour of the powers that be, I will also live full time at last)
Take the Greeks, assuming a die number 1 to 20, if a score equal to or greater that 18 will cause a hit then there are 3 scores out of 20 that will hit, 18, 19 & 20 (15% if my math is right) that miss, on the other hand, if the die is number 0-19 then there are only 2 chances. If I half the score to 9 and use a d10 then there are 2 rolls out of 10 that hit or 20% and so on down the line, only the odd factor, cavalry, 15 to hit giving 6 chance out of 20 equal to 3 out of 10.
I now see 3 options (apart from trying harder to buy/borrow/make dice):
a)alter the odds and live with the small relative difference,
b) use d10 and combine with a d6 die roll to indictate whether the result is high (11-20) or low (1-10). In theory this would be done by rolling teh pair of dice at the same time but then I might as well use my 1 20 siders. Since the lowest score that can possible score a hit is 12, I could in effect just roll the d6. 1,2,3 = low, no hit regardless of what the d10 rolls, 4,5,6 is high, roll again and add 10 to the score.
c) Roll a d10 and double the score. (giving possible scores of 2,4,6 etc). Each face of the 10 sided die represents 2 x the number shown and 1 less than that eg 2 = 3 & 4, 9=17,18, 0=19 & 20. If the score required to hit is exceeded then the hit is scored, if the number is met then you need to roll again 1,2,3 it is the lower number and the hit is missed, 4,5,6 then it is the higher number and the hit counts. So, against hoplites a score of 0 on the d10 would hit, a score of 8 or less would miss and a score of 9 would have to be confirmed witha 50% chance each of missing or hitting.
Perhaps I should have called this post, "Storm in a Teacup"
EXCERPT FROM APPENDIX 1 from Don Featherstone's Battles With Model Soldiers
(The book that got me started.)
"Nothing in these pages is a dictate, no word says you must or you shall do it this way. On the contrary, the book sets out from the very beginning to stimulate the reader to think for himself, and to use what he has read merely as a foundation for efforts and ideas which reflect his own temperament and character. Only in this way will he obtain maximum satisfaction from the hobby of battling with model soldiers."
-Don Featherstone 1918 - 2013
Wednesday, January 20, 2010
What are the odds?
Posted by Ross Mac firstname.lastname@example.org
Born and raised in the suburbs of Montreal, 5 years in the Black Watch of Canada Cadets, 5 years at the Collège militaire royal de Saint-Jean followed by 4 in the navy. 25 years with CPC in IT simultaneous with 23 years running a boarding kennel. Inherited my love of toy soldiers from my mother's father. Married with a Whippet, 10 Italian Greyhounds and 3 cats. Prematurely retired and enjoying leisure to game, maintaining our 160 yr old farmhouse and just living.