player
In German, 'Spieler' is the term used to refer to a player, whether it be in sports, games, or other activities. It is a masculine noun, and its plural form is 'Spieler'. For example, in a football match, each individual participating is referred to as a 'Spieler'.
The player wins the game
This sentence is describing a situation where the subject, in this case the player, is the winner of the game. It uses the verb 'gewinnt' which is the third person singular form of 'gewinnen' meaning 'wins'.
I am a good player
The speaker is describing themselves as a good player. The sentence uses the verb 'bin' which is the first person singular form of 'sein' meaning 'am'. 'Guter' is the masculine form of 'good' used because 'Spieler' is a masculine noun in German.
You are an experienced player
The speaker is addressing someone else, indicating that they are an experienced player. The sentence uses the verb 'sind', the second person plural form of 'sein' meaning 'are'. 'Erfahrener Spieler' translates to 'experienced player'.