[White "Van Os (olandese) — de Graaf (olandese) —Leek (Olandese) "]
[Black ""]
[Event "409"]
[Site ""]
[Round ""]
[Date "1938"]
[Result "*"]
[GameType "20"]
[Setup "1"]
[FEN "W:WK46,K45,15,K05:B31,17,K06,03."]

1. 46-19 ( { Metodo 2 (Leek). } 1. 45-23 31-36 2. 23-32 03-09 { (A) } ( 
17-22 3. 05-14 06-01 4. 14-20 01-06 5. 20-47 ) 3. 05-19 17-22 4. 19-24 
06-01 5. 24-47 01-45 6. 46-37 45-01 7. 37-26 01-45 8. 26-03 09-13 9. 03-14 
45-01 10. 15-10 01-06 11. 32-41 13-18 { (B) } ( 06-01 12. 41-37 01-06 13. 
10-05 06-01 14. 47-24 13-18 15. 24-47 { [con una minaccia 37-28;; quindi 
il Nero deve giocare _ 15. . . 1-6 (č impossibile 15. . . 1-12 a causa 
di 16. 37-31 36 : 27 17. 14-32x),  } 01-06 ( 01-12 16. 37-31 36x27 17. 
14-32 27x38 18. 47x33x17x03 ) 16. 14-19 ) 12. 10-05 22-27 13. 41-46 27-31 
14. 14-19 { e il Nero non ha mosse soddisfacenti. Se, ad esempio, } 06-01 
{ o 18-22 } 15. 46-37 31x42 16. 47x29x12 01x23x14 17. 05x46 36-41 ) 03-09 
2. 19-24 ( 2. 45-18 $2 31-37 3. 19x46 09-14 4. 05x28x11 06x22x04 { Pari 
} ) 31-36 3. 45-23 17-22 4. 23-19 06-11 5. 19-02 11-16 ( 11-17 6. 24-20 
17-03 7. 20-25 22-27 8. 02-16 27-31 9. 16-32 ) 6. 24-20 09-14 7. 05x28x11 
16x07 8. 02x16 36-41 9. 16-32 *