Is This a Catalan or a Semi-Slav?
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Catalan
Black can try to use the semi-slav move order, delaying Nf6, to take and hold onto c-pawn. It's unclear whether white has enough compensation. Black can make a similar pawn grap with Nf6 played earlier, but white can either choose to regain pawn, or get more clear-cut compensation for pawn.
Thanks. I didn't know where to look for information on this position.