Agent 1: H44XX4L1C10U5: not that clever
Agent 2: Try my best to do it :)

  A B C D E F  
1 . X X X X . 1
2 O . . . . O 2
3 O . . . . O 3
4 O . . . . O 4
5 O . . . . O 5
6 . X X X X . 6
  A B C D E F  

Turn 1: Agent 1 -> B6B4

  A B C D E F  
1 . X X X X . 1
2 O . . . . O 2
3 O . . . . O 3
4 O X . . . O 4
5 O . . . . O 5
6 . . X X X . 6
  A B C D E F  

Turn 2: Agent 2 -> F2E3

  A B C D E F  
1 . X X X X . 1
2 O . . . . . 2
3 O . . . O O 3
4 O X . . . O 4
5 O . . . . O 5
6 . . X X X . 6
  A B C D E F  

Turn 3: Agent 1 -> B4E4

  A B C D E F  
1 . X X X X . 1
2 O . . . . . 2
3 O . . . O O 3
4 O . . . X O 4
5 O . . . . O 5
6 . . X X X . 6
  A B C D E F  

Turn 4: Agent 2 -> A2B2

  A B C D E F  
1 . X X X X . 1
2 . O . . . . 2
3 O . . . O O 3
4 O . . . X O 4
5 O . . . . O 5
6 . . X X X . 6
  A B C D E F  

Turn 5: Agent 1 -> C6F6

  A B C D E F  
1 . X X X X . 1
2 . O . . . . 2
3 O . . . O O 3
4 O . . . X O 4
5 O . . . . O 5
6 . . . X X X 6
  A B C D E F  

Turn 6: Agent 2 -> A4D4

  A B C D E F  
1 . X X X X . 1
2 . O . . . . 2
3 O . . . O O 3
4 . . . O X O 4
5 O . . . . O 5
6 . . . X X X 6
  A B C D E F  

Turn 7: Agent 1 -> D1C2

  A B C D E F  
1 . X X . X . 1
2 . O X . . . 2
3 O . . . O O 3
4 . . . O X O 4
5 O . . . . O 5
6 . . . X X X 6
  A B C D E F  

Turn 8: Agent 2 -> A5C3

  A B C D E F  
1 . X X . X . 1
2 . O X . . . 2
3 O . O . O O 3
4 . . . O X O 4
5 . . . . . O 5
6 . . . X X X 6
  A B C D E F  

Agent 2 wins!