Kim's Game

What is Kim's Game?

Kim's Game is a classic memory training exercise named after the protagonist of Rudyard Kipling's 1901 novel Kim, where a young spy improves his observational memory by memorising a tray of objects. In this digital version you are shown a set of icons for a fixed time, then asked to find them on a larger grid that includes distractors. The game trains visual working memory — the ability to hold a mental image of several distinct items and recognise them among competing choices under time pressure.

How to play

Choose a difficulty (Easy: 3 icons; Medium: 6; Hard: 9), a memorise time (5–60 seconds), and whether to enable Hint mode. Press Start. Study the icons displayed in the memorise grid — use the full time, don't rush. After a 5-second countdown the icons disappear and a larger recall grid appears. Click every icon you remember seeing. Green outlines mark correct picks; red outlines mark wrong ones. The round ends when you have found all target icons or (in Hint mode) when all distractors have been cleared.

Visual working memory and training

Visual working memory has a well-documented capacity limit of about three to four distinct objects for most adults (Cowan's 'magical number four'). This limit can be partially expanded through chunking — grouping items into meaningful units — and through repeated practice that makes encoding and retrieval faster even if the raw capacity changes little. Kim's Game forces active encoding strategies (naming items internally, grouping by category) because passive viewing is insufficient at Medium and Hard difficulty. Research on working memory training suggests that practice with near-limit loads, gradually increased, produces the most durable improvements.

Tips to score higher

Don't just look — label each icon with a name or story. Grouping items into a mental narrative ("there's a house, a clock, and an envelope — someone is waiting for a letter") dramatically improves recall at Hard difficulty. Scan the recall grid methodically from top-left to bottom-right rather than randomly — this ensures you check every cell. Use Hint mode when learning: it removes distractors over time, letting you focus on the remaining icons without time pressure. Progress by reducing memorise time before increasing difficulty.

FAQ

Why is it called Kim's Game?

The game is named after the memory exercise in Rudyard Kipling's 1901 novel Kim. The young protagonist, Kim, is trained as a spy by memorising objects on a tray, then recalling them from memory. Military and intelligence services have used similar exercises for observation training ever since.

What does Hint mode do?

In Hint mode a random distractor icon is removed from the recall grid every 5 seconds. This makes the game progressively easier over time, letting beginners complete a round without being overwhelmed by the number of options. Distractors that you have already clicked as wrong picks are not removed by hints.

Does difficulty affect memorise time?

No — memorise time is set independently by you in the setup screen. Difficulty only changes how many icons you must memorise (3, 6, or 9) and how large the recall grid is (3×3, 4×4, or 5×5). This lets you choose a short memorise window at Easy or a long one at Hard depending on how you want to train.

Also try Search the Screen for a faster peripheral scanning challenge. Explore all raatools games.