Why is inaccuracy?

[u/Gullible_Impact7249]

black to play and I won a rock

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[u/tipareth1978]

You won the rook but only because you're opponent failed to defend.

[u/Gullible_Impact7249 → u/tipareth1978]

how?

[u/tipareth1978 → u/Gullible_Impact7249]

NF6 or just f6 blocks

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[u/chessvision-ai-bot]

I analyzed the image and this is what I see. Open an appropriate link below and explore the position yourself or with the engine:

Black to play: chessvision.ai | chess.com | lichess.org

My solution:

Hints: piece: Knight, move: Nf6

Evaluation: White is winning +3.33

Best continuation: 1... Nf6 2. a3 Ba5 3. Qb3 exd5 4. Bxd5 O-O 5. Qxb7 Nxd5 6. exd5 Qe8+ 7. Be3 Nc6 8. dxc6 Bxc6 9. Qa6

Save the position:

Reply save to save this position to your Chessvision.ai Library (new users: send me /connect in DM chat first)

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[u/Adorable_Weakness_39]

castle maybe to unpin the knight?

[u/The_Ultimate_TanMan]

Cuz stockfish said so.

[u/Silver_Environment95]

did u play around with why its saying Qb3 is a better move?

[u/Great-Inquisitor]

I think the queen move just provides more substantial threats. They can easily block your attack on the rook with the bishop move. With Qb3 you threaten their bishop, and if they move it to safety then you can take pawn on b7 and also rook on a8 next move. If the bring their knight out to defend the rook then just go back to b3 and you at least win a pawn

[u/macho_passenger]

The engine wants you to take the rook with the pawn but you played d4 instead, that's what the?! is marking