Samuel Lipnowski and Gustavo Melamedoff are the leaders in Open section. You can fund below the fourth round pairings, the previous results can be checked here.

 1 Lipnowski, S (1)      :     Melamedoff, G (13)
 2 Langner, D (3)        :     Nikouline, A (6) 
 3 Schulz, W (8)         :     Khedkar, J (12)  
 4 Van Wyk, J (18)       :     Vincent, T (4)   
 5 Raihman, I (26)       :     Boron, A (14)    
 6 Oberton, D (11)       :     Gentes, K (2)    
 7 Babb, J (5)           :     Thompson, B (20) 
 8 Tang, E (7)           :     Liu, W (24)      
 9 Lauritson, J (15)     :     Kaptsan, A (9)   
10 Cleto, S (19)         :     Repa, J (10)     
11 Curtis, R (28)        :     Richmond, B (16) 
12 Bince, R (17)         :     Greenberg, H (25)
13 Silva, T (27)         :     Booth, K (21)    
14 Pottinger, C (22)   .5:.5   BYE