Cutting — playing a spade on a non-spade lead when you're void in the suit — is the most powerful move in Spades. It's also the most misused. Cut everything and you burn trumps you need later. Cut nothing and you leave books on the table.
When to cut
Cut when the book matters. If you need the book for your bid, cut. If the book being lost would set your team, cut. If the book contains high non-trump cards that opponents are trying to walk, cut.
Cut when your partner needs it. If your partner is bidding aggressively and needs coverage, cutting to save them is a partner move that pays back later.
When to let it go
Let it go when the book doesn't matter. Third and fourth position on a low-value book with no danger to your bid? Save the trump. You'll need it later.
Let it go when your partner is winning the book. Trumping your own partner's Ace of Hearts is a rookie move — you're not adding a book, you're just burning a spade for no reason.
Let it go when cutting would break spades early against your interest. If you're on a Nil, breaking spades hands opponents free leads at your partner.
How much spade to spend
Cut with the lowest spade that will win the book. If you're third or fourth and someone's already cut with a 5, you need a 6 or higher — but don't play your King. Save the Kings and Aces for cuts that need them.
The exception: when you know the opponents can over-cut with a Power 2 or Joker. If the top cards are still out there, cutting with a middle spade just donates it. Wait for a book where you know the top trumps are gone.
