Setup
Shuffle two decks together. Deal ten columns of four face-up cards — forty cards, the 'forty thieves'. The other 64 cards form the stock.
Forty Thieves (also called Napoleon at St Helena) is a classic two-deck patience game. It's famously hard — only about one game in ten can be won — which makes every win worth bragging about.
Shuffle two decks together. Deal ten columns of four face-up cards — forty cards, the 'forty thieves'. The other 64 cards form the stock.
Build down in the columns by suit: a 7 of hearts can go on an 8 of hearts. Only the top card of a column can move, one card at a time. Any card may fill an empty column.
Eight foundations build up by suit from Ace to King. Move cards there as soon as it's safe.
Turn one card at a time from the stock to the waste. The top waste card can be played. There is no redeal.
Win by moving all 104 cards to the foundations.
Same table, no loading screens — pick your next hand.