4...fxe6 5.Qc3+ , preparing Rxe6 with a strong initiative.

Intending a4-a5 with a second front. White is clearly better.

Restricting the knight on b8.

In order to double rooks at some moment. Black can hardly undertake anything.

A key move that keeps up the pressure.

Exploiting the fresh protected square. Meanwhile, Black still can't develop his knight or queen's rook.

Swapping the defender on e6.

Black resigned.

Preparing ...c7-c5 in order to restrict White's minor pieces.

This helps Black gain space and bring his king closer, although White had no prospects.