Engine-checked

Where a modern engine corrects the book

The assessments on ChessDocs come from the classic books, but the classics were written without engines, and now and then a modern engine overturns a specific claim — an evaluation, a "White is winning", a recommended move. Where that happens, the site keeps the book's analysis and adds the correction next to it in the move list, marked with a robot icon :

Boards can be stepped through with the mouse wheel, a swipe, or the arrow keys — not just the buttons below them. Interactive boards

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1. 13.
2. 14.
3. 15.
4. 16.
5. The source has White carrying out the central offensive unopposed, but engine analysis shows Black could have equalized here through trades
6. 17.
7. 18.
8. 19.
9. 20.
10. 21.
11. 22.
12. 23.
13. 24.
14. 25.
15. 26.

Step to Black's 16th move. The book treats White's advance in the center as unstoppable; the engine note points out that 16...dxe5 traded the attack off and held the balance. The game went 16...g6, and White's pawns duly broke through.

How to read them

• The engine note sits directly under the book's comment on that move and never replaces it — you see both the original claim and where it goes wrong.
• The note itself is one plain sentence — what the book said, then the corrected verdict — sometimes with a short engine line played out on the board. No evaluations in pawns, no engine names.
• A note appears only where the book is wrong on the substance. A close call or a matter of taste is left alone — this is not a re-analysis of the classics by engine, just a footnote where one is needed.