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On The Rich Get Richer

The Baron's latest wager set Sir R----- the task of surpassing his score before he reached eight points as they each cast an eight sided die, each adding one point to their score should the roll of their die be less than or equal to it. The cost to play for Sir R------ was one coin and he should have had a prize of five coins had he succeeded.

A key observation when figuring the fairness of this wager is that if both Sir R----- and the Baron cast greater than their present score then the state of play remains unchanged. We may therefore ignore such outcomes, provided that we adjust the probabilities of those that we have not to reflect the fact that we have done so.

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On Quaker's Dozen

The Baron's latest wager set Sir R----- the task of rolling a higher score with two dice than the Baron should with one twelve sided die, giving him a prize of the difference between them should he have done so. Sir R-----'s first roll of the dice would cost him two coins and twelve cents and he could elect to roll them again as many times as he desired for a further cost of one coin and twelve cents each time, after which the Baron would roll his.
The simplest way to reckon the fairness of this wager is to re-frame its terms; to wit, that Sir R----- should pay the Baron one coin to play and thereafter one coin and twelve cents for each roll of his dice, including the first. The consequence of this is that before each roll of the dice Sir R----- could have expected to receive the same bounty, provided that he wrote off any losses that he had made beforehand.

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On Share And Share Alike

When last they met, the Baron challenged Sir R----- to a wager in which, for a price of three coins and fifty cents, he would make a pile of two coins upon the table. Sir R----- was then to cast a four sided die and the Baron would add to that pile coins numbering that upon which it settled. The Baron would then make of it as many piles of equal numbers of no fewer than two coins as he could muster and take back all but one of them for his purse. After doing so some sixteen times, Sir R----- was to have as his prize the remaining pile of coins.

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On One Against Many

Recall that the Baron proposed a pair of dice contests in which Sir R-----, were he to best the Baron's score, stood to win a bounty of thirteen coins.
Upon paying his stake Sir R----- was to cast his die but, if unhappy with its outcome, could pay a further coin to cast it again. Likewise, if he were not satisfied with the second cast, he could elect to cast a third time for a further two coins. He could continue in this fashion for as long as he pleased with the cost rising by one coin for each additional cast of his die. The Baron was to have but a single cast of his die, with Sir R----- to determine whether after or before his own play according to his stake; seven coins for the former and eight for the latter.

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On High Rollers

In the Baron's most recent wager, he was to roll a twenty sided die marked with the digits zero to nine twice apiece and place it either upon a space representing tens or upon another representing ones according to his fancy, after which Sir R----- was to do the same. Then the Baron and Sir R----- were to roll a second die each and place them upon their empty spaces. If the number thus made by the Baron was smaller than that made by Sir R-----, then Sir R----- was to have a prize of twenty nine coins from the Baron, otherwise the Baron was to have one of thirty coins from Sir R-----.

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On South Seas Roll 'Em

The Baron's latest game consisted of up to four turns throwing a pair of dice and cost nine coins to play. After each turn Sir R----- may have elected to stop playing and collect their sum as winnings.
On hearing these rules, it immediately occurred to me that he should only continue the game if he has thrown a sum less than that he might expect to win in future turns.
We can thus reckon the expected winnings before throwing the dice by considering the expected winnings after throwing them, conditional upon the cases of having done better and having done worse than expected in future turns.

I explained this insight to the Baron, but fear I may not have done so with sufficiently clarity since I was struck with the impression that he had not fully understood me. Hopefully I shall do better with this exposition!

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On Warren Terror

In the Baron's most recent game Sir R----- was to place a total of between four and eight coins upon four spaces after which the Baron would give him two coins and do likewise. A four sided die was then to be cast to determine who should have won the wager, with he having the most coins upon the space thus indicated taking all of the coins upon the table. In the event of a draw, each should have had his own coins back from it.

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On The Game Masters Of Triskelion

The Baron's last game pitted Sir R----- against him in a duel of dice. At each turn the Baron would add a token to a pile, initially containing four tokens, and he would roll a six sided die and Sir R----- would roll a four sided die. If Sir R-----'s roll equalled or exceeded the Baron's he could remove two tokens from the pile. The game cost Sir R----- a single coin to play and should he have ever exhausted the tokens would have won four coins from the Baron.

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On Two Against One

Recall that in the Baron's latest game, for a cost of one coin, Sir R----- could roll two dice and have from the Baron coins equal in number to the best of them. In return, the Baron would have from Sir R----- coins equal to the roll of a solitary die.

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On Flannel

The Baron's game of Flannel is one that my fellow students and I are familiar with, it being curiously identical to the game of Sweat-Cloth that is much played in the taverns near our college.

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