[Retros] Die Schwalbe, No 11464 cooked

[fieberg at gcr.com]

Dear All,
unfortunately Natch also proofed - after three months(!) of analysis - that
there are many solutions.
I intended to show a certain theme which does not exist so far.

In the meantime I fixed the composition and even improved the theme!
But the computer (even with 2 GHz) is slow in finding the intended
solution.

I would much appreciate if one of you is interested in checking the fixed
composition of #11464 as for certain tasks humans are still the best
solvers.

Kindest regards,
Christoph Fieberg

P.S. I do have some other extremly difficult (at least for computers)
compositions in store. Human help would be great!!

----- Forwarded by Christoph Fieberg/GCR-Germany/GRN on 10.06.02 18:51
-----
                                                                                                                                       
                      "Otto Janko"                                                                                                     
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                      10.06.02 17:59                                                                                                   
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11464 - Christoph Fieberg
Die Schwalbe Heft 194, Mar/Apr 2002

[8/1RpnPn2/5p2/3bN1k1/2N5/1Q1R1p2/1PPPPPr1/4K2r]

12+9. Proof game in 23.0 moves


Solution #1 :
---------------------------------------------------------------------
 1. Ph2-h4   Pg7-g5     2. Rh1-h3   Bf8-g7     3. Rh3-d3   Bg7-f6
 4. Rd3xd7   Ng8-h6     5. Rd7-d3   Bc8-e6     6. Nb1-a3   Qd8-d5
 7. Ng1-f3   Nb8-d7     8. Pg2-g4   Qd5xa2     9. Na3-c4   Qa2-b1
10. Ph4xg5   Qb1xc1    11. Pg5xf6   Be6-d5    12. Pf6xe7   Pf7-f6
13. Bf1-h3   Ke8-f7    14. Pg4-g5   Ra8-g8    15. Pg5-g6   Ph7xg6
16. Bh3-f5   Pg6xf5    17. Ra1xa7   Pf5-f4    18. Ra7xb7   Rg8-g2
19. Qd1xc1   Kf7-g6    20. Qc1-b1   Nh6-f7    21. Nf3-e5   Kg6-g5
22. Qb1-a2   Pf4-f3    23. Qa2-b3   Rh8-h1

Solution #2 :
---------------------------------------------------------------------
 1. ...      ...        2. ...      ...        3. ...      ...
 4. ...      ...        5. ...      ...        6. ...      ...
 7. ...      ...        8. ...      ...        9. ...      ...
10. ...      ...       11. ...      ...       12. ...      ...
13. ...      ...       14. ...      ...       15. ...      ...
16. ...      ...       17. ...      ...       18. ...      ...
19. ...      ...       20. Qc1-a1   ...       21. ...      ...
22. Qa1-a2   ...       23. ...      ...

Solution #3 :
---------------------------------------------------------------------
 1. ...      ...        2. ...      ...        3. ...      ...
 4. ...      ...        5. ...      ...        6. ...      ...
 7. ...      ...        8. ...      ...        9. ...      ...
10. ...      ...       11. ...      ...       12. ...      ...
13. ...      ...       14. ...      ...       15. ...      ...
16. ...      ...       17. ...      ...       18. ...      ...
19. ...      ...       20. Qc1-a1   ...       21. ...      ...
22. Qa1-a3   ...       23. Qa3-b3   ...

Solution #4 :
---------------------------------------------------------------------
 1. ...      ...        2. ...      ...        3. ...      ...
 4. ...      ...        5. ...      ...        6. ...      ...
 7. ...      ...        8. ...      ...        9. ...      ...
10. ...      ...       11. ...      ...       12. ...      ...
13. ...      ...       14. ...      ...       15. ...      ...
16. ...      ...       17. ...      ...       18. ...      ...
19. ...      ...       20. Qc1-a1   ...       21. ...      ...
22. Qa1-a4   ...       23. Qa4-b3   ...




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