Brain Blow Level 20
📝 Walkthrough
Overview
Grass covers the board with several bugs crawling across it, and a large stone sits among them. The prompt asks how many bugs you see. Some bugs are hidden under the stone, so counting only the ones out in the grass gives a low total. The stone must be dragged aside to expose the bugs underneath, after which the full count is entered into a number field and confirmed with Ok. The total number of bugs, including those under the stone, is 9.
- Difficulty: Regular
- Estimated moves: 2
Step-by-Step Solution
- Count the bugs already visible on the grass, but treat this as a partial count only, because the stone in the middle can conceal more insects underneath.
- Press and hold the stone, then drag it off to the side so the ground beneath it becomes visible. Move it far enough that every bug under it is exposed rather than partly shaded.
- Add the newly revealed bugs to your earlier count until the full total across the grass and the uncovered spot reaches 9. Scan around the edges of the moved stone for any small insects you missed.
- Enter 9 into the number field below the board and press Ok to confirm. The level completes when the bug count matches, and any low number comes from bugs still hidden under the stone.
- Before entering the count, lift the stone a little higher if any bug still crawls in its shadow, since partially covered insects are easy to forget when the rock sits low. Combine the ground trail and the under-stone bugs in one tally, and watch for tiny bugs near the grass edges as well. If Ok rejects the number, the most likely cause is a bug still hidden under the stone rather than an arithmetic slip, so drag the rock aside again and recount the exposed ground.
- After the stone is moved aside, give the exposed ground a quick second look for bugs that crawled out only after the cover lifted. The full count of 9 combines the open trail with the insects under the rock, and confirming both groups before pressing Ok avoids a rejected partial total.
Strategy & Reasoning
Hidden-count levels place a solid object over part of the answer, so the visible creatures are only the first layer. The stone is movable, which signals that something is concealed beneath it rather than merely resting on top. Releasing the cover before counting repeats the same mistake as ignoring it entirely.
Once the stone moves, the ground underneath shows the remaining bugs, and the combined count reaches the expected total. The Ok button accepts this full number, so a partial visible count will be rejected. There are no bugs to conjure; every counted insect is present either on the grass or under the stone.
Tips & Common Mistakes
- Drag the stone aside before counting; bugs hidden underneath are part of the answer and must be included.
- Check the edges of the uncovered area for tiny bugs that may sit half behind the moved stone.
- Do not enter the visible-on-grass count alone; that figure excludes the insects concealed under the rock.