The correct prize for an apparent $42.9 million slot machine jackpot that a Thornton woman hit at a Central City casino should have been $20.18, Colorado gaming regulators said today. [Denver Post 5/19/2010]
Ouch. I bet there was a whole lotta screaming going on, starting with great enthusiasm and then ending badly.
The machine was a progressive, meaning that the payout is based on previous bets and other similar machines. In order to win the Big Payout, the player must bet the max, which in this case was $4. The player had bet only the minimum, $0.40.
The Colorado Division of Gaming’s forensic investigation found that the slot machine malfunctioned and displayed the wrong payout because of errors in “mathematical calculations built into the game software.”
That’s a heck of a big mistake. Seems like an extra (missing?) if() statement would’ve caught that one.