Chess Pre-Move Checklist: The SCAN Method for Beginners

The SCAN is a 4-question checklist you run before every move. It catches hanging pieces, missed captures, and one-move blunders before they happen. Most games under 800 ELO are decided by exactly these mistakes. The SCAN won't make you a grandmaster, but it'll stop the bleeding.

Safe? Capture? Attacked? Next?

Four letters. Four questions. Run them every single move, no exceptions. It takes about 5 seconds once you've practiced it, and it eliminates the most common reason beginners lose games: moving without looking.

Who This Is For

Players rated under 800 on Chess.com. If your games look like a series of pieces disappearing for no reason, with occasional checkmates that seem to come out of nowhere, The SCAN is built for you.

You don't need to know opening theory. You don't need to calculate 5 moves ahead. You need to stop giving away pieces for free. That's what this does.

The 4 Questions

S: Is my piece Safe after I move it?

Before you let go of a piece, check: is anything attacking the square I'm moving to? If your opponent can take it for free on the next move, pick a different square.

This catches the most common blunder in beginner chess: moving a piece to a square where it's undefended. At 400 ELO, players leave pieces hanging on average 3-5 times per game. Each one costs material, and material wins games at this level.

C: Can I Capture anything?

Scan the board for free pieces. Is anything your opponent left undefended? Can you take something where the trade is in your favor (taking a bishop with a pawn, for example)?

Beginners miss free captures constantly. They're so focused on their own plan that they don't notice their opponent just left a rook hanging. The C in SCAN forces you to look.

A: Is anything Attacked that I need to defend?

Your opponent just moved. What did that move threaten? Is one of your pieces now under attack? Is there a fork, a pin, or a skewer you're not seeing?

This is the question most beginners skip. They look at their own pieces, decide what they want to do, and completely ignore what their opponent is doing. That's how you walk into a knight fork that costs you a rook.

N: What's my Next move going to be?

Before you commit, think one move ahead. If I play this, what will my opponent probably do? And what will I do after that? You don't need to calculate deep lines. Just one move of "what happens next" catches most tactical traps.

The N step is what separates a 400-rated player from a 600-rated player. At 400, you play the first thing that looks okay. At 600, you check if that "okay" move actually survives the next move.

Check how often SCAN violations show up in your games →

The SCAN in Practice

Position 1: The free bishop

You're about to develop your knight to c3. Good developing move. But wait: your opponent's bishop on a5 is completely undefended. The C question catches this. Take the bishop first, develop the knight later.

Position 2: The hidden threat

Your opponent just moved their queen to h5. You want to push a pawn on the queenside. The A question stops you: that queen is staring at f7, and if you ignore it, it's mate in one. Defend first, push pawns later.

Position 3: The one-move trap

You're going to move your bishop to c4. Looks fine, it attacks f7. But the N question: what does your opponent play next? They take your undefended pawn on e4 with their knight, forking your king and rook. The move was "fine" until you thought one step ahead.

How to Practice The SCAN

You can't just read this and magically remember it during a game. The checklist needs to become automatic. Here's how.

Days 1-3: Say it out loud. Every move, literally whisper "Safe? Capture? Attacked? Next?" to yourself. It'll feel silly. Do it anyway.
Days 4-7: Write it on a sticky note. Stick it on your monitor. Glance at it before every move. You'll start to internalize the order.
Days 8-14: Speed it up. You should be running through all 4 questions in under 10 seconds. If you can't, you need more practice on the individual steps.

Play Rapid games (10+ minutes per side) while you're learning. You need time to actually run the checklist. Blitz will undo the habit before it forms.

Common Mistakes

Skipping the A question. This is the most skipped step. Beginners check if their own move is safe, look for captures, but forget to ask what their opponent is threatening. The A question is what prevents you from walking into traps.

Only running SCAN on "important" moves. Every move matters. The blunder that loses your game usually happens on a move that felt routine. Run the checklist on every move, including the boring ones.

Running it too fast. Speed comes with practice. For the first 50 games, take your time. A slow, thorough SCAN beats a fast, sloppy one every time.

FAQ

Does The SCAN work at higher ratings? The specific format is designed for sub-800 players, but the underlying habit (checking safety, threats, and consequences before every move) is universal. Stronger players do this automatically. The SCAN just makes it explicit.

What if I run out of time doing the checklist? Play longer time controls. Rapid (10+0 or 15+10) gives you plenty of time. If you're playing Blitz and running SCAN, you'll flag. That's okay. Speed comes after the habit is locked in.

How long until I stop needing the checklist? Most players internalize it within 2-3 weeks of consistent use. You'll stop saying the letters and start just... checking. That's the goal.

What's Next

The SCAN handles the middlegame, which is where most beginner games are won and lost. But you still need a solid opening system to avoid falling behind before move 10, and endgame patterns to convert when you're ahead.

How to Reach 400 ELO covers the fundamentals that pair with The SCAN
Why Beginners Keep Hanging Pieces goes deeper on the S and A questions
How to Reach 1000 ELO maps out the full improvement roadmap