2001 Computer Olympiad Lines of Action Championship
          ===================================================

        +--------------+-----+-----+-----+-------+-------+--------+
        | Crosstable   | YL  | MIA | App |  P-O  | Total |  Medal |
        +--------------+-----+-----+-----+-------+-------+--------+
        | 1 YL         |  x  | 2-2 | 4-0 |  2-0  |  8-2  |  Gold  |
        +--------------+-----+-----+-----+-------+-------+--------+
        | 2 MIA II     | 2-2 |  x  | 4-0 |  0-2  |  6-4  | Silver |
        +--------------+-----+-----+-----+-------+-------+--------+
        | 3 Apprentice | 0-4 | 0-4 |  x  |       |  0-8  | Bronze |
        +--------------+-----+-----+-----+-------+-------+--------+


 The Sixth Computer Olympiad was held in August 2001, in Maastrict,
 The Netherlands.

 YL, by Yngvi Bjornsson, successfully defended it's title, but needed
 to win a playoff match against a much improved MIA II, by Mark Winands.
 Apprentice, by Don Beal, is a new entry to the computer Lines of Action
 competition this year.  (Mona, by Darse Billings, did not compete this
 year).


 Gamescores (in chronological order)
 -----------------------------------

 The time control was 30 minutes each for the whole game (including the
 two playoff games).

 Click on the game number for a complete move-by-move analysis.

 Notes on how to interpret the output are given below.


   Comp-Oly-2001-g1    YL vs MIA-II  1-0             August 19, 2001

   1. d1-b3 h4-f2   2. b1-b4 h2-e2   3. b8-b5 h3-e3   4. c1-c3 h7-f7
   5. g8-g6 h6-f4   6. d8-b6 a7-a1   7. b6-b2 a6-c6   8. b5:e2 f2-c5
   9. e8-e4 f4-d2  10. f8-d8 f7-c4  11. f1:c4 a1-d1  12. e2:h5 a2-a6
  13. c8:a6 c6:e4  14. g6:e4 d2:b2  15. g1:d1 a5-a1  16. e4-d3 e3-d2
  17. d8-d4 a1:d1  18. h5-f3 c5-b5  19. f3:a3 d1-e2  20. a3-e3 b2-a3
  21. e1-f2 e2-b2  22. f2-c5 b5-d7  23. b3-b6++  YL wins


   Comp-Oly-2001-g2    MIA-II vs YL  0-1             August 19, 2001

   1. c8-c6 a4-c2   2. d8-b6 a6-c4   3. b8-b5 h2-e2   4. g8-g6 a2-d2
   5. g6:c2 h4-f2   6. b6:f2 h6-e3   7. e8-e4 a3-c5   8. g1-g2 h3-g4
   9. g2:g4 h5-d5  10. g4-d4 a5-b6  11. f8-f5 h7-f7  12. e1-g3 e3-c3
  13. g3-e3 c3:e3  14. f2-g3 e3-c3  15. g3-e3 c3:e3  16. e4-e7 c5:e7
  17. f5-f2 d5:b5  18. c6-e6 b5-c6  19. b1-d3 c6:c2  20. f1-f4 f7:f4
  21. e6:c4 e7-e4  22. c4-b3 f4-g3  23. c1-a1 a7-b7  24. d4-b4 b7-d5
  25. a1-b2 c2-c3  26. b3:d5 b6-c7  27. b2-a3 c7-e5  28. b4-d4 g3-g4
  29. d5-e6 e5-f4++  YL wins


   Comp-Oly-2001-g3    YL vs MIA-II  0-1             August 20, 2001

   1. d1-b3 h4-f2   2. b1-b4 h7-f7   3. g8-g6 h2-e2   4. f8-c5 h3-e3
   5. b8-b5 h5-d5   6. c1-c4 h6-h5   7. f1-g2 h5:c5   8. c8:c5 e3:b3
   9. d8-b6 d5-d6  10. g6-f5 f2:f5  11. e1-f2 e2-f3  12. g1-g3 a2-d2
  13. c4-c6 a7-a2  14. e8:a4 f7-c4  15. c6:f3 b3:f3  16. f2-h4 d2-d4
  17. g2-h3 f5-e4  18. h4-h6 e4-c6  19. h6-g7 a3-e3  20. g3-e5 a2-b2
  21. e5:e3 b2-c1  22. e3:c1 f3-d5  23. g7-g8 c4-f7  24. b4-b7 f7-d7
  25. g8-g7 a5-b4  26. b6-a5 d6-c7  27. a4-b3 c6-e6  28. b7:d5 d7:b5
  29. h3-g2 e6-c6  30. g2-f1 d4-f4  31. d5-d6 f4-d4  32. c1-d2 a6-b7
  33. f1-g2 b7:b3  34. a5:c7 d4-b2++  MIA-II wins


   Comp-Oly-2001-g4    MIA-II vs YL  1-0             August 20, 2001

   1. g8-g6 a5-c7   2. d1-b3 a7-d7   3. b1-b4 h7-e7   4. g1-g3 h6:f8
   5. g3:c7 f8:b4   6. e1-e4 a4:e4   7. c1-d2 a2:d2   8. f1-d3 h3:d3
   9. g6-e6 e4-d5  10. e6-c6 a6:c6  11. b3:d5 a3-d6  12. e8-a8 d6-b6
  13. d5-b5 h4-h1  14. a8-a7 d2-d6  15. d8-a8 b4-a5  16. b5:d3 b6-d4
  17. a8:a5 e7-c5  18. d3-c4 d7-b5  19. b8-b6 c6-a4  20. a7:a4 d6:b6
  21. c7-b7 h1-g1  22. a4-a6 b5-a4  23. c8:c5 g1:c5  24. c4-b3 d4-b4
  25. b7-c6 a4-a1  26. a6-b5 h5-d5  27. c6-a4++  MIA-II wins


   Comp-Oly-2001-g5    Apprentice vs MIA-II  0-1     August 22, 2001

   1. b1-d3 a3:d3   2. d1-f3 h2-f2   3. f3-f7 a7-d4   4. g1-g3 h7:f7
   5. g3:d3 a6:c8   6. b8-c7 a2-d5   7. d3-b5 c8-e6   8. e1-c3 a5:c3
   9. g8-c8 d4-g4  10. c8-c4 a4-b3  11. e8-c6 b3-e3  12. Resigns
      MIA-II wins

   Mona:  Black loses in 6 ply:  f1-d1 c3-f3 d8:d5 h4-e4 c1-c5 e4-f5


   Comp-Oly-2001-g6    MIA-II vs Apprentice  1-0     August 22, 2001

   1. g8-g6 a2-b3   2. c8-c6 a3-d3   3. g1-g3 h2-g2   4. f8-f6 h4-f4
   5. c1:f4 h6:f4   6. f1:f4 a7-c7   7. e1-e3 a6-c4   8. b8-b5 g2-f2
   9. e8:h5 c7:f4  10. c6:c4 f4:c4  11. d8-b6 h7-g8  12. b6-e6 f2-e2
  13. d1:d3 h3-f5  14. b1:f5 a4-a6  15. b5-c6 b3-c2  16. f6-f4 Resigns
      MIA-II wins


   Comp-Oly-2001-g7    Apprentice vs YL  0-1         August 22, 2001

   1. b1-d3 a3:d3   2. d1-f3 h2-f2   3. g1-g3 h7-f7   4. e1-c3 h5:f3
   5. d8-f6 h4:f6   6. e8-e7 a2-d5   7. g3-e5 f2-d4   8. c1-e3 a4-b5
   9. e3-e6 a6:e6  10. b8-d6 h6:d6  11. c3-c5 a7-d7  12. g8-d8 h3-e3
  13. Resigns  YL wins

 
   Comp-Oly-2001-g8    YL vs Apprentice  1-0         August 22, 2001

   1. d1-b3 h7-f5   2. f8:f5 h3-e3   3. b1-b4 h4-e4   4. e8:e4 e3:b3
   5. b8-b5 h2-f2   6. f1-c4 a3-c3   7. g1-g3 h6-f4   8. c1-e3 a6-b6
   9. g3:c3 a7:e3  10. c8-c5 f4-e5  11. c3:e5 e3-c3  12. g8-g7 f2-d2
  13. d8-d6 h5-h4  14. e1-g3 c3-f3  15. g7-f7 f3-g4  16. f7:b3 Resigns
      YL wins


   Comp-Oly-2001-g9    Apprentice vs MIA-II  0-1     August 23, 2001

   1. g8-e6 h6:e6   2. b8-b6 h2-f2   3. b1-d3 a3:d3   4. f8-f5 a7-c7
   5. c1-c4 c7:c4   6. d8-d5 a6-e2   7. e1-c3 a5:c3   8. g1-g2 a4-d4
   9. g2-e4 c4-c7  10. b6-d6 a2:d5  11. c8-a8 f2:f5  12. a8:d5 c7-e7
  13. d1-c2 h4:e4  14. f1-f3 e6-g6  15. d6-e5 h7-h4  16. f3:f5 h3:f5
  17. Resigns  MIA-II wins


   Comp-Oly-2001-g10   MIA-II vs Apprentice  1-0     August 23, 2001

   1. b8-b6 h7-f7   2. e1-g3 h2-f2   3. g1-g4 a2-d5   4. g8-g5 a4-d4
   5. g4:d4 a5-e5   6. d1:d5 h6-e6   7. g3:e5 a3-c3   8. g5-c5 a7-c7
   9. f8-d6 f7-d7  10. c1-b2 h3-f3  11. b1-b4 f3:d5  12. f1-d3 h5-g4
  13. b2-b5 h4:d4  14. d3:a6 f2-e2  15. b4-b7++  MIA-II wins


   Comp-Oly-2001-g11   Apprentice vs YL  0-1         August 23, 2001

   1. g8-e6 h6:e6   2. b8-d6 a6:d6   3. b1-d3 h2-f2   4. e1-c3 a7-d4
   5. f8-f5 a5:c3   6. c8-c5 h4-e4   7. d1-b3 h5-f7   8. c1-d2 f7:b3
   9. e8-c6 a4:c6  10. g1-e1 c3-e5  11. d2-e3 f2:f5  12. c5-c3 h7:d3
  13. f1:d3 h3-g2  14. e1-d1 g2-d5  15. d1:b3 d6-b4  16. b3-g3 c6-c4++
      YL wins


   Comp-Oly-2001-g12   YL vs Apprentice  1-0         August 23, 2001

   1. c1-c3 a2-c4   2. d8-b6 a4-d4   3. b8-b5 h6-e6   4. f8-d6 h2-f4
   5. d1:d4 h4:d4   6. d6:d4 h7-f5   7. e1-b4 h3-e3   8. f1:f4 h5-f7
   9. c8-c5 f7-d7  10. b5:f5 e6:b6  11. e8-e6 e3-c1  12. g1-g3 c4-e2
  13. g8-g6 e2-e4  14. e6:e4 a6-d6  15. c5-c2++  YL wins


   Comp-Oly-2001-p1    YL vs MIA-II  1-0             August 23, 2001

   1. b1-b3 a2-c2   2. g1-e3 a5-c5   3. f8:c5 a3:c5   4. c1-f4 a4-c6
   5. b3-d5 a6-d6   6. d8-f6 h4:f6   7. e8-e5 a7-d4   8. g8-e6 h3-f3
   9. f4:d4 h5-e2  10. e1-f2 f6:f2  11. e6:e2 h6-f4  12. d4:f4 c2-e4
  13. d1-c2 f2-g3  14. f1-g1 h2:e2  15. g1-d4 e2-d3  16. b8-d8 h7-h8
  17. c2-b2 h8-h7  18. d8-f8 h7-h6  19. b2-c2 g3-f2  20. c8-d7 h6-e6
  21. d4-f6 e6-g4  22. c2:c5 c6:f6  23. f8-e8 d3-c4  24. e8-c6++
      YL wins


   Comp-Oly-2001-p2    MIA-II vs YL  0-1             August 23, 2001

   1. b8-b6 a7-c7   2. g8-g6 h4-f2   3. g1-g3 h2-e2   4. b1-e4 h3-f5
   5. e8:h5 h7-f7   6. c1-e3 a4-c4   7. d1-d3 c4:e4   8. c8-e6 a2-d2
   9. d8-d5 h6:e3  10. b6:e3 c7-e5  11. g6-g4 e5-d4  12. e6-b3 d4:g4
  13. f8-g7 d2-g2  14. g3-f4 g2:d5  15. b3-f3 a5-b6  16. f4-g3 b6:e3
  17. g7:g4 f2-d4  18. f1:f5 a3-b4  19. g3-f4 f7-e7  20. g4-g5 b4:f4
  21. h5:e2 e7:e2  22. e1-f1 e2-e5  23. f1-c4 a6-b6  24. f5-e6 b6-d6++
      YL wins


 How to interpret the output
 ---------------------------

 For the games between YL and MIA-II, each move was analyzed by Mona
 (11-ply) and YL (10 minutes per move).

 The principle variations and other interesting lines are given.  Some
 of these lines may be slightly in error, or incomplete, due to the way
 the programs keep track of the PV.  The last four moves of each line
 have been deleted (unless it is mate), since they are usually not very
 meaningful.

 YL's analysis might not agree with the move it actually played, because
 the tournament time control was 30 minutes each for the entire game.
 This results in search times from 30 seconds to 3 minutes, instead of
 the 10 minutes allocated for analysis of each move.  The choices given
 here will generally be better than those actually played.  When the
 move played differs from YL's preference, the last two iterations for
 the actual move are also given.

 The distance to mate may not be accurate, because both programs use
 the null move heuristic.  Mona iterates two-ply at a time, and uses
 a one-move lookahead for mate threats, either of which may alter the
 reported distance to mate.

 Regarding the first move of the game, the current versions of Mona and
 YL believe 1. d1-b3 and 1. b1-b3 are the two best opening moves (along
 with symmetrical moves, of course), followed by 1. c1-c3.  YL tends to
 do better with b1-b3, because it leads to sharper positions where YL's
 deeper search is advantageous.  Conversely, Mona tends to do better with
 d1-b3, due to her better understanding of blockading positions.

 MIA prefers c1-c3, and more centrally-oriented moves in general, as did
 Mona and YL prior to the addition of blocking knowledge.  Other opening
 moves are not considered to be as strong, but are still quite playable,
 and can lead to interesting positions.

 A note about the minimax scores:

 Mona and YL use different scales, so their scores should not be compared
 directly.  A score of about +100 by YL or +300 by Mona usually indicates
 a clear advantage.  There is a significant odd-even effect, so odd-ply
 values are optimistic (for Mona, too high by at least 50 points).

 Mona indicates a mate threat with a +2000 bonus, so a score of +4150
 indicates a small positional advantage and a double threat to connect.
 Only certain types of mate threats are detected statically, so there
 could be more in a given position.  Mona reserves 0 (zero) for a draw
 and +32000 for a win.  YL uses +30000 for a win, minus the number of
 moves to mate, so a score of -29988 means a loss in 12-ply.