original: Structure and rules A match between two opponents consists of up to eleven alternating rounds of boxing and chess sessions, starting with a four-minute chess round followed by three minutes of boxing and so on.
simplifications: A match is between two people for eleven rounds. Each round is a four-minute chess round follow by three minutes of boxing. A match between two people has eleven rounds of boxing and chess sessions. Starting with a four-minute chess round and then a three minutes of boxing and so on. A match consists of up to eleven alternating rounds of boxing and chess sessions between two opponents. It starts with a four minute chess round. Three minutes of boxing comes next and so on. Structure and rules: A match between two people features up to eleven alternating rounds of boxing and chess sessions. This starts with a four-minute chess round followed by three minutes of boxing, and so on. Structure and rules A match between two opponents has up to eleven alternating rounds of boxing and chess. They start with a four-minute chess round. Then there is three minutes of boxing and so on. A match is made up of eleven round of boxing and chess sessions. It starts with four minutes of chess, followed by three minutes of boxing, and so on. A match between two opponents consists of up to eleven rounds of boxing and chess sessions, starting and alternating between four-minute chess rounds and then three minutes of boxing. A match between two people made of up to eleven alternating rounds of boxing and chess sessions. It starts with a four-minute chess round then three minutes of boxing and goes back and forth. Form and rules: A game of (2) players consists of up to (11) rotating rounds of boxing and chess periods, starting with a (4) minute chess round, then (3) minutes of boxing and so on. Structure and rules A match between 2 rivals includes a lot of up to 11 turns  rounds of boxing and chess sessions, beginning with a 4 minute chess round led by boxing for 3  minutes and so on.