Ender Wiggin IQ

Ender is the strongest tactical mind in the novel, and his feats are shown, not just told. He turns the Battle Room into a three-dimensional problem, makes a group of new recruits into the best army in the school, and wins a final battle against overwhelming numbers. What keeps the estimate below the top is that the adults who train him deceive him throughout, and he does not set the terms of the game. For his age the tactics are remarkable, but the strategy is his handlers'.

Age-normed for a child of about 6 to 10. Ender is six when he is picked for Battle School and ten when promoted to Command School.

Six ratings out of ten, each based on what is shown on the page or screen. They are how the estimate is built, not a substitute for it.

Deduction8/10

Solving new problems from thin information

Strategy10/10

Multi-step plans that account for other minds

Knowledge7/10

Depth and breadth of what they know

Invention8/10

Building or devising something genuinely new

Adaptability10/10

Recovering when the plan breaks

Reading people9/10

Understanding what other people want and will do

1. Fighting Stilson

   Moderate evidence

   Ender's Game, opening chapters

   At six, with his monitor removed, Ender is cornered by a bully named Stilson and hurts him badly. Graff, visiting after the fight, hears Ender's reasoning: showing superiority now prevents a string of future fights. It is a strategic idea about deterrence, from a child, and it is what gets him offered a place at Battle School. It also shows the cold side of that reasoning, since Ender does not realise until later how badly Stilson was hurt.

2. The enemy's gate is down

   Strong evidence

   Ender's Game, Battle School

   In the zero-gravity Battle Room, most commanders hold on to the orientation of the corridor they walked in through, with the enemy gate straight ahead. Ender decides that the enemy's gate is down. His soldiers then drop in feet first, present small targets, shield themselves with their own legs and attack from angles nobody in the school has used. Rethinking a game that everyone else had played for years is the invention and adaptation the scale rewards, and it is shown in play, not described.

3. Building Dragon Army

   Strong evidence

   Ender's Game, Battle School

   Given command of Dragon Army, Ender takes new recruits and misfits and turns them into a winning unit, while the schedule is stacked against him with battles coming back to back. It shows that his tactical thinking extends to training and morale, and to designing an army around its actual members rather than a standard model. Leadership skill and strategic design in the same person is a strong mark, and it is evidence of his teaching as well as his fighting.

4. The Mind Game

   Moderate evidence

   Ender's Game, Battle School and Command School

   Ender meets a computer game in which a giant offers a choice of drinks and he is repeatedly killed whichever he picks, until he stops playing by the game's rules and attacks. The puzzle has no conventional solution, and his answer is a reframing rather than a better move. It is a good demonstration of lateral thinking under repeated failure, and it foreshadows the lesson of the final battle. Nobody taught him that trick.

5. The final battle

   Strong evidence

   Ender's Game, the ending

   In his last test at Command School, Ender's heavily outnumbered fleet faces enemy forces surrounding their homeworld. He fires a Molecular Disruption Device, the weapon known as the Little Doctor, at the planet, destroying it and paralysing the fleet around it. Only afterwards does Mazer Rackham reveal that the simulations were real battles. The plan is superb and unorthodox, and the fact that Ender did not know what he was doing is the cost.

• Managed by GraffEnder's Game, throughoutColonel Graff shapes Ender's experience from the start, isolating him and controlling who he can trust. Ender adapts to each situation but never spots that the situation itself is being engineered. For a strategist, failing to notice that the whole structure is a plan is a large blind spot.
• Killing Bonzo without knowing itEnder's Game, Battle SchoolBonzo Madrid confronts Ender outside the game, and Ender again uses excessive force, and Bonzo dies. Ender does not learn it until later. His preemptive logic works in the Battle Room and misfires in real life, where he cannot judge his own strength or the consequences of a fight he only meant to end.

Age-normed, a ten-year-old who commands fleets and beats adult specialists is in the extraordinary band on planning and adaptation alone. Learning speed is high, since he moves through the school faster than anyone before him. The estimate stays out of the 170s because the novel makes him a tool of a plan he cannot see, and because his best moves are instinctive and fast, less reasoned than inspired. The popular claim that he is a boy genius beyond any adult overlooks that the adults designed the tests he passes.

IQ estimates for fictional characters are fan analysis: an argument from what the story shows, not a measurement. Read the full method and the standards we hold every profile to.

The argument is usually Ender versus other child prodigies such as Light Yagami or Lisa Simpson, or whether Ender's genius is real or engineered. Sceptics say Graff picks the conditions and that any bright child in those circumstances would improve. Supporters answer that no one else in the school comes close to his results. We think the feats are real and the framing is manipulative, and we rate him exceptional for his age while noting that he is a tactician more than a strategist, since he seldom picks the war himself.

• Light Yagami IQ: 155Ruthless planner, fatally proud
• Lelouch vi Britannia IQ: 150Chess prodigy with loaded dice
• Shikamaru Nara IQ: 145Lazy on purpose, sharp on demand
• Lisa Simpson IQ: 140Gifted, principled, and often too certain