Three pegs hold coloured balls labelled A to E. Rearrange them to match the goal pattern, moving only the top ball of a peg at a time and only if the destination peg has room. Before each puzzle loads, a complete search over all possible arrangements finds the true minimum number of moves needed, so you always know exactly how efficient your solution was.
Loading exercise...
This measures sequential planning and forward-looking working memory: rearranging coloured balls across three pegs to a goal pattern in as few moves as possible, scored against the proven minimum. It rewards thinking several moves ahead and committing to a plan before acting, the core of procedural planning.
Identify which ball must sit deepest in its target stack, then trace which balls are currently blocking it. Clearing the deepest blocker first often reveals the shortest sequence for the whole puzzle. Pilots who plan 3 or more moves ahead before touching the first peg consistently use fewer total moves than those who react move by move.
A session score of 80 or above means you are solving puzzles within 25 percent above the optimal move count on average. Reaching 90 or higher requires near-perfect solutions on most rounds, which means identifying the full sequence before starting. At the hard difficulty, the optimal path is typically 7 to 9 moves, so one or two wasted moves per puzzle makes a noticeable difference to the final score.
Aptitude tests get you through selection. The EASA ATPL theory exams come next, and SkyStudy is built for that phase.
SkyStudy is built for EASA ATPL exam preparation, with an ATPL question bank, timed mock exams, spaced repetition and analytics across every subject. Free to start, no card needed.