The Addition Maze is a 3 by 3 keyboard puzzle that lets first graders practice single-digit addition while steering a cursor from a starting 2 to a goal cell whose visited cells add to exactly 19. The board is fixed and small enough that a grade 1 reader can see every number, every wall, and every path between them without zooming. The whole task is built around four accepted arrow moves, an honest wrong-route trap, and an exact 19 target that any first grader can add in their head. Because the route is disclosed and reproducible, the Addition Maze doubles as a quick classroom warm-up and a self-checking home activity, with a deterministic 800-point best score that a child can try to match on a second attempt. This article explains what the maze looks like on the page, exactly how to walk the winning route, what happens if the first move goes Down instead of Right, and which controls (restart, boss key, and exact scoring) make it classroom-friendly for a six or seven-year-old.
What the Addition Maze Looks Like on the Page
The Addition Maze is rendered as a semantic CSS grid rather than canvas art. That means every cell is a labeled block that a screen reader can announce, including its number, its wall status, and whether the cursor has visited it. The grid has three rows and three columns, with the cursor starting at the top-left cell, which contains the number 2. The goal sits in the bottom-right corner. The other seven cells hold either a number or a wall. The five passages between cells are declared once and do not change between attempts. The numbers visible on the board stay the same on every play, so the same path that scores 800 today will score 800 tomorrow.
All five numbers used on the winning route are single-digit values: 2, 4, 6, 2, and 5. Together they total 19, which is well inside the mental addition range of a first grader who has been working on sums up to 20. The maze does not require carrying, regrouping, decimals, or any operation beyond adding the number you are stepping onto. Because there is no timer, no audio cue, and no account, a child can pause between moves without losing progress or competing against a clock.
How to Play the Addition Maze With Arrow Keys
Playing the Addition Maze is a five-step keyboard routine that a first grader can repeat after one demonstration.
- Open the Addition Maze page and use the arrow keys to move the cursor on the grid.
- The cursor begins on the top-left 2. The running sum reads 2, the starting score reads 1,000, and the move counter reads 0 accepted moves.
- Press an arrow key. A move only succeeds when the neighboring cell contains a number, shares a declared passage, and has not already been visited. Walls, closed edges, and revisits are no-ops that do not change the cursor and do not subtract points.
- Watch the running total after each accepted step. The target is 19, not "around 19" and not "close enough." Reaching 19 anywhere short of the goal does not finish the maze.
- Land on the bottom-right goal cell with a sum of exactly 19. The validator records completion, locks the final score, and writes the best score to this browser's localStorage so the same device can show it on a later attempt.
If the running sum climbs above 19 at any point, the validator reports a deadlock immediately. If the cursor reaches the goal with a sum below 19, completion fails for the same reason. The only finish is the combination of correct destination and exact sum.
The Winning Route Step by Step
Because the board is fixed, the winning route is also fixed: Right, Down, Right, Down. It visits five numbered cells in order, and the running total lands on exactly 19 when the cursor reaches the goal.
| Step | Key | Cell value | Running sum |
|---|---|---|---|
| Start | — | 2 | 2 |
| 1 | Right | 4 | 2 + 4 = 6 |
| 2 | Down | 6 | 6 + 6 = 12 |
| 3 | Right | 2 | 12 + 2 = 14 |
| 4 | Down | 5 | 14 + 5 = 19 |
| Goal | — | — | 19 (complete) |
The arithmetic is exactly what a grade 1 student would write on paper: 2 + 4 = 6, then 6 + 6 = 12, then 12 + 2 = 14, and finally 14 + 5 = 19. Four accepted moves drop the score from 1,000 by 50 points each, so the best score reads 800. This single worked example is the only arithmetic the maze asks of a player; every other step is a navigation decision, not a calculation. Because the values and route are visible on the page, a teacher can write the same table on a whiteboard and let students check their own answers after each move.
Why the First Down Move Dead-Ends
The cursor's first neighbor below the starting 2 is the cell containing 8. Pressing Down accepts that move, adds 8 to the running sum, and brings the total to 10. That cell has exactly one passage, and it leads back to the starting 2, which the rules forbid revisiting. With no unvisited connected neighbor left, the maze reports a deadlock immediately.
This is not a glitch. The down-first path is a deliberate wrong-route trap that exposes the no-revisit rule in a way a first grader can see and feel. After the deadlock message appears, the honest recovery is to restart. Restart returns the cursor to 2, clears the visited path, restores 1,000 points, and removes the completion or deadlock flag, leaving the board identical to its original state for a fresh attempt.
Other dead ends work the same way. Any accepted step that pushes the running sum past 19 reports a deadlock immediately, and any route that arrives at the bottom-right cell with a sum other than 19 also reports a deadlock. The four-move winning route shown above is the disclosed solution that scores 800 points. This makes the Addition Maze a small but honest lesson in path planning for grade 1 learners: think one step ahead about which neighbor is still open, not just which neighbor looks reachable.
Score, Restart, and the Boss Key
Scoring is transparent and based only on accepted moves. The formula is the larger of zero and 1,000 minus 50 times the number of accepted moves, so four accepted moves land on exactly 800 and any longer solution drops below that. Blocked arrow presses cost nothing because they are not accepted moves; they leave the cursor, the running sum, and the score unchanged. A first grader who taps the wrong key on a wall does not lose points for trying, which keeps retrying cheap.
Restart is the recovery control for any mistake, deadlock, or just a fresh try. Pressing it returns the cursor to 2, clears the route, restores 1,000 points, and removes any completion or deadlock flag. The previous best score remains readable from this browser's localStorage so the next attempt can be measured against it on the same device. There is no account, no leaderboard, and no network call, so a child's score never leaves the browser they are using.
The boss key is a shared Escape-double-press gesture that swaps the screen for a simulated spreadsheet, then repeats to resume the unchanged maze. For a first grader this is mostly a no-op; for an adult sharing a device it is the quick way to make the screen look like work without losing the puzzle state.
Using the Addition Maze in a Grade 1 Lesson
For a parent or teacher, the Addition Maze fits into a short math block in three natural ways. The maze is a pure keyboard activity, so it works on any device with arrow keys, including the laptops many classrooms already lend out for center time. The only arithmetic the puzzle requires is the single-digit addition that first graders are already practicing, which means the cognitive load sits on navigation and reading the running sum rather than on new math. The deterministic 800-point best score gives a child a clear, repeated target to beat on a second or third try, without depending on hidden daily boards or randomized difficulty.
Open the Addition Maze directly and let a first grader drive it. The fastest path is four arrow presses: Right, Down, Right, Down. The arithmetic is 2 + 4 + 6 + 2 + 5 = 19. If the first move goes Down instead, the maze locks immediately and Restart returns the board to its starting state, which is itself a small lesson about trying a different route. After one clean run, ask the child to predict what each arrow key does before pressing it; that kind of planning talk turns a four-move puzzle into a real grade 1 reasoning task.
For a deeper look at why this specific four-move route works, the Addition Maze strategy guide walks through each step in order. To extend the same idea to other operations, the Math Maze swaps single-digit addition for a mixed operation puzzle, while the Maze Game drops the arithmetic entirely and focuses on pure keyboard navigation through a winding path.