There is beauty in simplicity.Everton’s second goal in their opening day win over Crystal Palace proved that. A quick free kick, a stunning cross and a header home, with a slight deflection, from your No 9 — in this case Thierno Barry, to complete a 2-0 victory.David Moyes was full of praise for it and the timing of Barry’s 53rd-minute goal was crucial, as it halted any momentum Palace had from the first half.The Everton manager lauded Iliman Ndiaye’s cross and Barry’s movement in the post-match press conference. “We are trying to get more balls in the box,” Moyes told the club’s official channel after the game. “We are trying to get Thierno in the right positions as often as we can. Thankfully, we did.”However, Everton’s back-post threat was a key part of their attack in the Premier League last season and Moyes clearly wants to build on it.In the lead-up to Barry’s goal, new midfield signing Hayden Hackney, who has joined from Middlesbrough in the Championship, played the quick free kick to Ndiaye down the right, with Barry positioned in front of Palace’s central centre-back, Chris Richards.The Everton centre-forward holds his position as Ndiaye creates a crossing angle, and makes the run towards the back post when the Senegal winger is connecting with the ball.The beauty of Ndiaye’s cross is only matched by the timing of Barry’s movement, which does not give Richards or Jaydee Canvot any clues until the ball is in the air.Barry and Beto’s movement inside the penalty area plays a big role in Everton’s threat at the back post, even if they are not the goalscorers.In this example, from the 2-0 victory against Brighton & Hove Albion last August, Barry’s movement momentarily frees Ndiaye at the back post.