The Scheveningen variation is a chess opening
White starts by moving the e-pawn two squares
Black responds with 1… c5, entering the sicilian
After this, White moves the g1-knight to f3
Black goes for the move d7-d6
White can react with the move d2-d4
Black should take this pawn...
...and White takes it back with the knight
Then Black plays Ng8-f6, attacking the e4-pawn
White defends this pawn with the move Nb1-c3
After this, Black plays e7-e6
This is the Scheveningen variation