At least four other deaths were attributed to Russian roulette during the year: a 34-year-old policeman in Peoria, Illinois, a 20-year-old in Houston, an 18-year-old in Saratoga Springs, New York, and a 16-year-old in Los Angeles. Subsequently, the term became a metaphor for taking foolhardy risks and its usage steadily increased in reportage of diplomacy, politics, economics, medicine and sports. Probability Math in this section is based on the use of a six-shot revolver with a single chamber loaded. Abnormal factors, such as the possibility of a dud round, are not included. Variant: revolver re-spun after each trigger pull With this variant, turn order is essential, because the probability of losing decreases the later one's turn is. Given a six-shot revolver, for any given single trial (pull), the probability of losing is . However, since all players only come into the game if and when each of the players before them has caught an empty chamber, the all-game loss probability for player (starting from 0) is reduced to . The all-game loss probabilities for each of the six players are hence, in order, , , , , , and to 1 decimal place. More generally, for a revolver with chambers, player 's all-game loss probability is . The probability of the revolver having fired after six pulls is , or about . More generally, for a revolver with chambers, the probability of the revolver having fired after pulls is , as this would be an instance of a geometric distribution where the success probability is . The average number of pulls for the gun to fire is in this variant (6 pulls, for a six-shot revolver). Variant: revolver only spun once at the start With this variant, turn order has no effect on the all-game loss probability, which remains the same for all players, but influences the single-pull probability, which increases with each pull. Given a six-shot revolver, at pull (starting from 0), the fact that all previously tested chambers were empty reduces the total number of possible locations of the bullet to , and the loss probability is therefore . The single-pull loss probabilities for each of the six players are hence, in order, , , , , , and to 1 decimal place. More generally, for a revolver with chambers, the loss probability at pull (starting from 0) is . However, since, like in the re-spinning variant, all