About Dutch Blitz, from BoardGameGeek:
In Dutch Blitz, each player has their own deck of forty cards, with cards 1–10 in four colors; red and blue cards show a Pennsylvania Dutch boy, while yellow and green cards show a Pennsylvania Dutch girl. Each deck has a different symbol on the back to aid with card sorting between rounds.
At the start of each round, each player lays out three cards face up in front of them to create their post piles; places a face-up stack of ten cards, seeing only the top card, next to their post piles to create their blitz pile; and holds the remaining cards in hand face down.
Playing at the same time, each player tries to empty their blitz pile. If they have a 1 on the top of any face-up stack, they play it to the center of the table to create a Dutch pile. If they have a 2 of the same color as any 1 on top of a Dutch pile, they can place the 2 on the 1. All cards on a Dutch pile must be played in ascending order and must be the same color. A player can also play from the blitz pile onto a post pile, or from one post pile onto another, but only if the numbers are in descending order and the boys and girls alternate.
If a player can't play anything, they can reveal cards from the stack in their hand, counting them out in groups of three, then laying them face up while revealing only the top card. They can play this top card onto a Dutch pile or post pile as long as they meet the rules for doing so.
As soon as a player empties their blitz pile, the round ends. Each player scores 1 point for each of their cards among the Dutch piles, then loses 2 points for each card remaining in their blitz pile. Players then sort all the cards and play another round. As soon as at least one player has at least 75 points, the game ends and the player with the most points wins.
Note that while the Dutch Blitz: Expansion Pack allows for play of Dutch Blitz with up to eight players (by having differently colored card backs), it is also a standalone game and is therefore listed as a separate edition of Dutch Blitz despite the name.
