Brain Test 5 Level 21

Overview

A bear and an axe sit beside a tree next to a railway track, and an oncoming train is approaching along the rails. The goal is to stop the train by felling the tree across the track so it forms a barrier; the bear is the animal used to push or bring the tree down, while the axe acts as a secondary tool around the scene.

• Difficulty: Hard
• Estimated moves: 3

Step-by-Step Solution

1. Survey the scene: the tree stands beside the rails, the bear and axe are nearby, and the train is coming along the track that the tree could block.
2. Identify the tree as the barrier. A loose prop on the ground cannot stop the train by itself, so the object that has to move is the standing tree.
3. Bring the bear to the tree and use it to push or fell the trunk. Direct the fall so the tree drops across the railway track rather than away from the rails.
4. Once the trunk lies spanning the track, it forms the obstruction that blocks the oncoming train from passing through.
5. The checkmark appears when the train has stopped behind the fallen tree that now blocks the line.
6. Aim the falling trunk by nudging the bear against the side of the tree that points toward the rails; a tree that topples away from the track leaves the line open for the train.
7. After the trunk lies across the track, watch that the oncoming train stops behind it; if the trunk has slid off the rails, reposition it across the line rather than assuming the barrier is in place.

Strategy & Reasoning

The level's obstacle is a fallen tree, and the route to produce it uses the bear rather than a direct swing at the train. The axe is the tempting-looking tool because it chops wood, but the solution described for this board has the bear doing the pushing or felling; the axe sits beside the scene as a supporting prop. The real target is not to harm the train but to convert the standing tree into a roadblock across the rails.
Why other choices fail: attacking the train with the axe does nothing to an approaching locomotive, and leaving the tree upright leaves the track open. The fall direction matters as much as felling it — a trunk that drops beside the track does not block anything, so it has to land across the rails. This is another Brain Test 5 case where an animal nearby is the real instrument and a displayed tool is the decoy. The completed board shows the train held behind the trunk, which confirms the barrier is positioned correctly.

Tips & Common Mistakes

• Do not swing the axe at the train; the obstruction has to be the tree falling onto the track.
• Aim the fall across the rails; a tree that drops to the side of the track will not stop the oncoming train.
• Keep the bear involved in pushing or felling the trunk; that animal, not the axe alone, produces the barrier.