I've moved your topic, Raymond, so other people can comment on it. Yes, the players do move around; often in fact. The 4-1-2-1-2 is a bit of a concrete system and doesn't allow much movement between the players, but you will often see the Lampards, Ballacks and Essiens of this world moving around and sometimes changing positions. A great example of players moving around between different positions is Michael Essien, who has played centre back, right back, defensive midfield, attacking midfield, right midfield and left midfield during his time at Stamford Bridge. During the 4-3-3 formation used in the past, our forward three of Anelka, Malouda and Drogba last season often changed positions. An example is the Fulham game at home we won 3-1 - all three of these players scored. Drogba moved out to the wing whilst Anelka came central, and at times, they'd change to have Malouda come inside from the wing and play behind two out and out strikers. You often see wingers changing flanks and midfielders sometimes can change their position - its very rare to see other players do so, however, unless instructed by the coach. But regarding the goalscoring question; any player on the pitch is allowed to score a goal, but it is very uncommon for goalkeepers to do so. These goals by keepers tend to be long-range (such as Paul Robinson's versus Watford) or in the dying seconds of a game when a team is losing and the keeper comes up to attack a corner or freekick.