About stackdle.io

A perfect clear trainer and daily puzzle that runs in your browser.

What it is

Every day stackdle.io gives you three short puzzles. Each one is an empty board and a fixed queue of pieces, and you have to clear the board completely. Everyone gets the same puzzles, a round takes a few minutes, and you can share your result without giving away the answers.

The other tabs are for practice:

• the finesse drill counts your key presses and shows you the quickest route;
• the perfect clear trainer has a solver that can show you a full solution;
• the 40-line sprint is there when you want to work on speed.

Why I made it

Perfect clears are one of the best feelings in competitive block stacking, and one of the hardest things to learn. Most practice tools I found were either full of jargon or needed a download. stackdle.io runs in the browser on desktop and phone, and it shows you why a move works, so you pick up the patterns instead of copying moves.

How the puzzles are made

The day's puzzles come from the date, so everyone sees the same pieces in the same order. Before a puzzle goes out, the built-in solver checks it can be cleared with the pieces given, tucks and spins included. Every puzzle has at least one solution.

Who makes it

I'm MH, an independent developer and a player myself. stackdle.io is a one-person project. It's free, and tips from players help keep it running.

If you like it, sharing your daily result with a friend helps a lot. So does a tip.

The fine print

stackdle.io is an independent project. It isn't affiliated with, endorsed by or sponsored by any game company or trademark owner. All code and artwork on this site are original.