Contest !

Find the solutions from 20 international draughts/checkers problems. The results.

And the winner is...

        

     


Here are 20 really challenging problems by the best international draughts/checkers problem constructors in the world. 

In each problem: white has to move and then wins consequently. White can always win directly, there are no forcings.

You can get 1 point for one correct solution. So in total 20 points are possible.

There are three prices for the winners. Here are the results:

1st price: 100 euro: Leo Faber (Netherlands)
2nd price: 50 euro:
Iwan Iwatsko (Ukrain)
3rd price: 25 euro: Nick Stepanyuck (Ukrain)

Other solvers with 20 correct solutions:

J. Bus (Netherlands)
E. Gorbulia (Russia)
J. de Heer (
Netherlands)
H. van der Heijden (
Netherlands)
N. Knoops (
Netherlands)
J. Konings (
Netherlands)
G.H. Kroese (
Netherlands)
W. Ludwig (Netherlands)
R. Lutje Schipholt (Netherlands
)
S. Mezenin (Ukraļn)
V. Morseld (
Netherlands)
G. van Os (
Netherlands)
Z. Pawlicki (
Poland)
A. Pruijs (
Netherlands)
J. Reiffers (
Netherlands)
W. Riemens (
Netherlands)
D. v.d. Stelt (
Netherlands)
P. Stil (
Netherlands)
H. Strating (
Netherlands)
J. Uyterlinde (
Netherlands)
J. Voormans (
Netherlands)
W. Wawiloff (
Russia)

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How to write the solutions?

Here are the numbers of the fields in international draughts / checkers

  1   2   3   4   5
6   7   8   9   10  
  11   12   13   14   15
16   17   18   19   20  
  21   22   23   24   25
26   27   28   29   30  
  31   32   33   34   35
36   37   38   39   40  
  41   42   43   44   45
46   47   48   49   50  

 

It's possible only to write the last field of only the white moves 
32,23,25x1,14,10,29.
Also is possible: 38-32, 29-23, 25x1, 23x14, 1x10, 16x29. (The complete white moves)
At least is also possible: 38-32(36x49)29-23(27x20)25x1(49x24)23x14(10x19)
1x10(5x14)16x29 (The complete white and the black moves).

 

   © Eric van Dusseldorp, Utrecht, 2002

1. I. Iwatsko (Ukrain)

 

2. S. Perepelkin  (Russia)

 

3. W. Matoes (Russia)

 

4. J. Pennings (The Netherlands)

 

Second solution: 28 etc.

5. E. Repetto (France)

 

6. A. Polman (The Netherlands)

 

7. A. Miedema (United Kingdom)

 

8. W. Lente (The Netherlands)

 

9. S. Perepelkin (Russia)

 

10. S. Yushkewitch (Ukrain)

 

It's a problem for Damweb Applet:  2x8 [beat 24,34,31 and 12] (18x29) 47-42 (46x2) (42-24 (2x30) 25x34.

11. L. Haikin (United States of America)

 

12. P. van Dijk (France)

 

Second solution: 14, 5 etc.

13. A. Malashenko (Belarussia)

 

14. D. de Ruiter (The Netherlands)

 

15. A. Rom (United States of America)

 

16. M. van Dijk (The Netherlands)

 

17. J. Wortman (The Netherlands)

 

Second solution: 440, 438 (43) 50, 21 (26) 44, 38, 48, 5

18. S. Yushkewitch (Ukrain)

 

19. B. Morkus (Lithuania)

 

20. H. Wilsens (The Netherlands)