Seven, sedma, sedmice on WikiPedia
Rules on Pagat
Rules how we play it:
Dealing & Draw
Dealer gives 4 cards to each player. Remaining stack is the draw pile.
After each trick, players draw in trick-winner order back up to four
until the pile is empty.
Leading a trick
Trick leader may play any card. That card’s suit becomes the trick suit.
Playing to the trick
You are not obliged to follow suit – play any card you like.
How a trick is won
Who played the last trump (Sevens are always trump) wins the trick
The trick winner leads the next trick.
Scoring
Ace and Ten giving one point each. On a draw, the last trick winner wins.
You get an extra round point for winning all points (16er) and all cards (24er)