When the engine move is wrong for you

The engine’s top move is the best move against perfect defense. You are not perfect, and neither is your opponent. Sometimes the second or third move on the list is the better choice for you: it is nearly as strong, and you can actually play the position that follows. This guide covers the three situations where that happens most, with positions we checked with Stockfish. If you would rather see suggestions pitched at your level from the start, ChessHelper (chesshelper.ai) lets you set the engine to any strength between 800 and 3200 Elo. We make ChessHelper; the free finder on our home page shows the top three at full strength.

Why the top move is not always your move

An engine scores a move by the position it reaches after the best play from both sides, many moves deep. It does not ask whether a human can find those moves, how much time is on the clock, or whether the opponent is likely to find the only defense. Two consequences follow.

First, the top move can depend on a precise follow-up that you would not find over the board. If you play the first move and miss the second, you can end up worse than if you had played a simpler move. Second, small differences in evaluation do not matter in human games. A gap of 0.20 between two moves will almost never decide a game below master level, while understanding your position will.

None of this means the engine is wrong about chess. It means the best move for you is the best move you can follow up. All evaluations below are from Stockfish at depth 18, shown from White’s side.

Long tactical lines and sacrifices you cannot follow up

abcdefgh

Black has just recaptured on d5 with the knight, a known inaccuracy in the Two Knights Defense. White’s knight on g5 and bishop on c4 both aim at f7. The engine’s top three:

• 6.Nxf7 +1.94
• 6.d4 +1.32
• 6.d3 +0.09

The top move, 6.Nxf7, is the Fried Liver Attack: White gives up a knight to drag the black king into the open. The engine’s main line runs 6...Kxf7 7.Qf3+ Qf6 8.Bxd5+ Ke8 9.Bxc6+ Qxc6 10.Qxc6+ bxc6, where White ends up a pawn ahead and Black has lost the right to castle. Other defenses lead to a king walk in the middle of the board, where White has to keep finding forcing moves or the extra piece tells.

If you know the Fried Liver, play it. If you do not, 6.d4 is the practical choice. It is still worth +1.32, it opens the center while Black’s king is uncastled, and it does not cost material. The danger is the third option: 6.d3 is a calm developing move that throws the advantage away (+0.09). The lesson is to choose between the moves that keep most of the advantage, not to retreat into the quietest move on the board.

A good test before playing any sacrifice: can you name the next two moves of the follow-up and the opponent’s best defense? If not, look at the second move on the list. Our next-move thinking checklist shows a sacrifice that looks thematic but loses, and how the blunder check catches it.

When you are ahead, simplify

abcdefgh

White is a knight and a pawn up. The queens face each other on the e-file. The engine lists:

• 1.Qxe6 +7.01
• 1.Rad1 +6.43
• 1.Rae1 +6.32

Here the engine agrees with the classic advice: when you are ahead in material, trade pieces, especially queens. After 1.Qxe6 fxe6 Black has no queen to create threats against White’s king, and Black is left with an isolated pawn on e6. The extra knight decides the endgame with straightforward play.

The other two moves also win, but they keep the queens on, and every queen move by Black becomes a possible check or fork that White has to calculate. In positions like this the engine’s evaluation of +6 or +7 is already decisive, and the practical rule is simple: among moves that keep a winning evaluation, pick the one that removes the opponent’s counterplay. If the engine’s top move ever keeps the queens on while a queen trade still scores clearly winning, the trade is usually the right choice for a human.

The opposite also holds. When you are behind, avoid trades and keep the position complicated, even if the engine rates a simplifying move slightly higher. Your chances come from your opponent’s mistakes, and fewer pieces mean fewer chances to make them.

When the clock decides

Engines analyze without time pressure. In a game, a move that needs ten minutes of calculation is worse than a move that is almost as good and can be played in one. This applies most in blitz and in time trouble in longer games: the practical move is the safe one that keeps your position together. The same logic applies when reviewing a fast game afterwards. If you played a slightly weaker but safe move with thirty seconds left, that was often the right decision, and the engine’s evaluation does not know it.

How to decide whether to trust the top move

Use the gaps between the engine’s choices and your own understanding together. The table summarizes the rules used throughout this site.

The last row is the exception that keeps this honest. When one move is far ahead, it almost always wins something by force, and playing a weaker move there is not practical, it is a mistake. For worked examples of the close cases at different ratings, read choosing the next move by rating.

Train with suggestions at your level

The simplest fix for engine moves you cannot use is to ask a weaker engine. With ChessHelper you set the suggestion strength yourself, from 800 to 3200 Elo, so the arrows show moves a player a little stronger than you would choose. Raise the setting as your understanding grows. With a full-strength engine such as the Lichess analysis board or our finder, apply the rules above yourself. Our comparison of next-move apps covers which tools offer a strength setting.

Quick answers

Is it wrong to play the engine’s second-best move?

No, as long as it is close. When the second move is within about 0.30 of the first and you understand it better, it is often the stronger practical choice. When the gap is over a pawn, the first move usually wins something and you should find out why.

Why does the engine suggest moves I don’t understand?

A full-strength engine looks many moves deeper than a human and does not care whether a line is easy to play. Tools with a strength setting, such as ChessHelper (chesshelper.ai), suggest moves closer to your level.

Related guides

Each guide covers a different part of choosing your next move. Start with the one that matches the question you have right now.