How do you play Ledger Lock?

Each puzzle is a 5x5 board of numbers with a target sum on every row and column. Tap cells to activate them so each row and column's active values add up to its exact target, without any two active cells touching orthogonally.

What makes Ledger Lock distinctive?

All the information is visible — there are no hidden tiles — so it plays like fast deduction rather than guessing. Every cell affects two sums at once and an adjacency rule shapes the layout, so it feels closer to a logic grid than an arithmetic drill.

How does scoring work and when does a run end?

You score 1 for every ledger you seal, and the next puzzle loads instantly on each clear. The run is a single 90-second shift, so your score is how many ledgers you balance before the timer runs out.

What is the orthogonal adjacency rule?

Two active cells may not sit directly next to each other up, down, left, or right; diagonal contact is allowed. So even if a pair of cells would hit a target, you can't use them together if they'd touch side by side.

Is Ledger Lock free to play?

Yes. Ledger Lock is a free browser logic puzzle with no install and no signup, and your best seal count is saved on your device with strong runs eligible for the global leaderboard.

Balance every row and column sum, but never let active cells touch orthogonally.

Score0

Puzzle1

Time90.0s

🏆 Best0

Hit every row and column target exactly.

Active cells cannot touch up, down, left, or right.

SUM

140

Start the shift, then match every row and column target before time runs out

Each puzzle starts blank. Lock only the cells you need.

Start the shift, then match every row and column target before time runs out

Ledger Lock — Play Free Online

HOW TO PLAY

Press Start Shift to begin a 90-second run.
Each puzzle shows a 5×5 board of values, with target sums above each column and beside each row.
Tap cells to activate them. Active cells add their value to both that row and that column.
Clear the puzzle by matching every target exactly while keeping active cells from touching orthogonally. Each clear loads the next ledger immediately.

TIPS & STRATEGY

Each cell you activate adds its printed value to both its row total and its column total at once, so plan every toggle around the two targets it touches, not just one.
Mind the spacing rule: active cells can't touch orthogonally (up, down, left, or right), so when two needed cells would sit side by side, find a different combination — diagonal neighbors are fine.
Use the live row and column readouts that show goal versus current sum; an 'over' total means you've activated too much value, 'under' means you need more, so you can correct toward each target.
Speed matters since the whole run is 90 seconds for as many puzzles as you can seal — if a board gets tangled, hit Clear (or R) to reset it and re-approach instead of fighting a bad layout.

ABOUT

Ledger Lock is a single-screen logic puzzle built around visible information instead of hidden tiles. You are balancing row and column totals while respecting a spacing rule, so each decision affects two sums and the shape of the remaining solution. That makes it feel closer to fast deduction than arithmetic drills. Your best seal count is saved on your device, and strong runs can be submitted to the global TOP 20 leaderboard.

FAQ

How do you play Ledger Lock?: Each puzzle is a 5x5 board of numbers with a target sum on every row and column. Tap cells to activate them so each row and column's active values add up to its exact target, without any two active cells touching orthogonally.
What makes Ledger Lock distinctive?: All the information is visible — there are no hidden tiles — so it plays like fast deduction rather than guessing. Every cell affects two sums at once and an adjacency rule shapes the layout, so it feels closer to a logic grid than an arithmetic drill.
How does scoring work and when does a run end?: You score 1 for every ledger you seal, and the next puzzle loads instantly on each clear. The run is a single 90-second shift, so your score is how many ledgers you balance before the timer runs out.
What is the orthogonal adjacency rule?: Two active cells may not sit directly next to each other up, down, left, or right; diagonal contact is allowed. So even if a pair of cells would hit a target, you can't use them together if they'd touch side by side.
Is Ledger Lock free to play?: Yes. Ledger Lock is a free browser logic puzzle with no install and no signup, and your best seal count is saved on your device with strong runs eligible for the global leaderboard.