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Last Updated: May 6, 2015

Heads or Tails

Introduction



I first wrote about Heads or Tails in 2005 when Playtech introduced a game based on the toss of a coin. Ten years later SoftSwiss created another coin flipping game. This page shall address both of them.

Playtech Version




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Playtech Rules



The player chooses heads or tails and then bets on 1, 2, or 3 flips.

Playtech Analysis



The following table shows the probability of winning and expected return for the three available bets.

Playtech -- Return Table

Bet Probability Pays Return
One flip 0.5 1.9 0.95
Two flips 0.25 3.8 0.95
Three flips 0.125 7.5 0.9375


SoftSwiss Version




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SoftSwiss Rules



The player makes a bet and then predicts the flip of a coin — a Bitcoin to be specific. Wins pays 198 for 100.

SoftSwiss Analysis



The following table shows the probability of winning and contribution to the return for both outcomes. Wins are expressed on a "for one" basis. The lower right cell shows a return of 99%. In other words, a house edge of 1%.

SoftSwiss -- Return Table

Event Probability Pays Return
Win 0.50 1.98 0.99
Loss 0.50 0.00 0.00
Total 1.00 0.99



Written by: Michael Shackleford

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