Ragnar Wikman (Finland)  vs  Mona            Jan 8 - Mar 31, 2001

   1. b8-b6 h5-f7   2. d8:a5 h7-e7   3. c8-c6 a7-d7   4. e8-b8 a3-d6
   5. g8-g6 a4-c2   6. b8-b5 h2-e2   7. f8:h6 h3:f1   8. g6-d3 d7:d3
   9. e1-c3 a2-c4  10. h6-f4 f1:f4  11. g1-e3 e7-g5  12. a5-d5 a6-a5
  13. b5-f5 h4-e4  14. Resigns (mate in six moves)

  Ragnar Wikman has been one of the world's top LoA players for many
  years.  He won the silver medal at the Mind Sports Olympiad in both
  1997 and 1998.  He is a perennial finalist in the e-mail tournament,
  and cruised into this year's final with a 7-0 sweep of his qualifying
  section.

  Move by Move:

      +-----------------+
    8 | . . B B B B B . |
    7 | W . . . . . . W |
    6 | W B . . . . . W |
    5 | W . . . . . . W |
    4 | W . . . . . . W |
    3 | W . . . . . . W |
    2 | W . . . . . . W |
    1 | . B B B B B B . |
      +-----------------+
        a b c d e f g h

   1. b8-b6 h5-f7

 Darse:  This is a new opening for Mona (symmetric to 1. b1-b3 h4-f2),
 based on a series of deeper searches from the initial position, and
 the main follow-up moves.  Mona previously played 1. b1-b3 a2-c2, as
 seen in the preliminary round (where she did not use an opening book).

      +-----------------+          +-----------------+
    8 | . . B B B B B . |        8 | . . B . B B B . |
    7 | W . . . . W . W |        7 | W . . . . W . W |
    6 | W B . . . . . W |        6 | W B . . . . . W |
    5 | W . . . . . . . |        5 | B . . . . . . . |
    4 | W . . . . . . W |        4 | W . . . . . . W |
    3 | W . . . . . . W |        3 | W . . . . . . W |
    2 | W . . . . . . W |        2 | W . . . . . . W |
    1 | . B B B B B B . |        1 | . B B B B B B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   2. d8:a5 h7-e7

 Darse:  This is an interesting opening.  There seems to be some
 differing opinions on the value of this early capture, so perhaps
 something can be learned from this game.  It isn't one of Mona's top
 choices (which is why it wasn't prevented with a7-c7), but obviously
 it is a reasonable move, and may have merits that are not understood
 by the simplistic evaluation function.

 Ragnar:  I am very short of time these days, so I have had to make
 this move entirely on 'feel' - no time to analyze any variations...


 ply value  best  principle variation (last 4-ply deleted)

 11    +79  h7-e7 b1-c2 h2-g3 c1-c4 a2:c2 c8-c5 a7-d7
 13    +73  h7-e7 b1-b3 h4-f2 b6:f2 h3-f5 b3:f7 a3-d6 c8-c6 a6-b7

 A note on Mona's minimax scores:

 There is a significant odd-even effect, so odd-ply values are likely
 optimistic (at least 50 points too high, so +50 should be interpreted
 as an equal position).  A score of about +150 usually indicates a
 small advantage, and +300 a clear advantage.

 In these games, Mona indicates a mate threat with a +2000 bonus, so
 a score of +4150 indicates a small positional advantage with 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.

      +-----------------+          +-----------------+
    8 | . . B . B B B . |        8 | . . . . B B B . |
    7 | W . . . W W . . |        7 | W . . . W W . . |
    6 | W B . . . . . W |        6 | W B B . . . . W |
    5 | B . . . . . . . |        5 | B . . . . . . . |
    4 | W . . . . . . W |        4 | W . . . . . . W |
    3 | W . . . . . . W |        3 | W . . . . . . W |
    2 | W . . . . . . W |        2 | W . . . . . . W |
    1 | . B B B B B B . |        1 | . B B B B B B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   3. c8-c6 a7-d7

 11   +150  a7-d7 b1-b3 a3-d6 g8-g6 a2-c2 b3-b5 h6-f4

      +-----------------+          +-----------------+
    8 | . . . . B B B . |        8 | . B . . . B B . |
    7 | . . . W W W . . |        7 | . . . W W W . . |
    6 | W B B . . . . W |        6 | W B B . . . . W |
    5 | B . . . . . . . |        5 | B . . . . . . . |
    4 | W . . . . . . W |        4 | W . . . . . . W |
    3 | W . . . . . . W |        3 | W . . . . . . W |
    2 | W . . . . . . W |        2 | W . . . . . . W |
    1 | . B B B B B B . |        1 | . B B B B B B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   4. e8-b8 a3-d6

 11   +175  a3-d6 f8:h6 h2-e5 b8-b5 e5:b5 c1-b2 a4-c4
 11   +179  a4-c2 b8-b5 h2-e2 f8:h6 a3-c5 h6-d6 c2:c6
 13   +141  a4-c2 b8-b5 h2-e2 e1-c3 a3-d6 g8-g6 h6-f4 b1-b4 h4-e4
 13   +150  a3-d6 f8:h6 h2-e5 b8-b5 e5:b5 c1-b2 h3:h6 b1:b5 h6:c6

      +-----------------+          +-----------------+
    8 | . B . . . B B . |        8 | . B . . . B . . |
    7 | . . . W W W . . |        7 | . . . W W W . . |
    6 | W B B W . . . W |        6 | W B B W . . B W |
    5 | B . . . . . . . |        5 | B . . . . . . . |
    4 | W . . . . . . W |        4 | W . . . . . . W |
    3 | . . . . . . . W |        3 | . . . . . . . W |
    2 | W . . . . . . W |        2 | W . . . . . . W |
    1 | . B B B B B B . |        1 | . B B B B B B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   5. g8-g6 a4-c2

 13   +136  h2-e5 c1-e3 a6-c4 e1:e5 c4:c6 f1-e2 h6-f4 e3:e7 a2-c2
 13   +161  a4-c2 b8-b5 h2-e2 e1-c3 h6-f4 d1-d4 h4-e4 c6:e4 d7:b5

      +-----------------+          +-----------------+
    8 | . B . . . B . . |        8 | . . . . . B . . |
    7 | . . . W W W . . |        7 | . . . W W W . . |
    6 | W B B W . . B W |        6 | W B B W . . B W |
    5 | B . . . . . . . |        5 | B B . . . . . . |
    4 | . . . . . . . W |        4 | . . . . . . . W |
    3 | . . . . . . . W |        3 | . . . . . . . W |
    2 | W . W . . . . W |        2 | W . W . . . . W |
    1 | . B B B B B B . |        1 | . B B B B B B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   6. b8-b5 h2-e2

 Darse:  Black gains a firm grip on the a6 piece, but I wasn't too
 concerned about this, because Mona has a lot of special-purpose code
 for extricating the least mobile outlier.  In the game, the piece is
 eventually released voluntarily, probably because Black has many other
 pressures to deal with.

 11   +161  h2-e2 e1-c3 h6-f4 d1-d4 h4-e4 c6:e4 d7:b5
 13   +150  h2-e2 g1-e3 h3:f1 c1-b2 a2-c4 e1-c3 c4-e6 b6-d4 h4-f4

      +-----------------+          +-----------------+
    8 | . . . . . B . . |        8 | . . . . . . . . |
    7 | . . . W W W . . |        7 | . . . W W W . . |
    6 | W B B W . . B W |        6 | W B B W . . B B |
    5 | B B . . . . . . |        5 | B B . . . . . . |
    4 | . . . . . . . W |        4 | . . . . . . . W |
    3 | . . . . . . . W |        3 | . . . . . . . W |
    2 | W . W . W . . . |        2 | W . W . W . . . |
    1 | . B B B B B B . |        1 | . B B B B B B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   7. f8:h6 h3:f1

 11   +199  h3:f1 c1-b2 f1-f3 h6-g5 a2:a5 b5:e2 a6-c4
 13   +191  h3:f1 c1-b2 a2:a5 g1-e3 e7:e3 b1:f1 f7-e6 d1-d4 h4-f2

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . W W W . . |        7 | . . . W W W . . |
    6 | W B B W . . B B |        6 | W B B W . . . B |
    5 | B B . . . . . . |        5 | B B . . . . . . |
    4 | . . . . . . . W |        4 | . . . . . . . W |
    3 | . . . . . . . . |        3 | . . . B . . . . |
    2 | W . W . W . . . |        2 | W . W . W . . . |
    1 | . B B B B W B . |        1 | . B B B B W B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   8. g6-d3 d7:d3

 11   +223  d7:d3 g1-e3 h4:h6 b6-d4 e7-c5 e3-e6 d3-e3
 13   +205  d7:d3 g1-e3 a2-c4 b1-b4 f1-f3 c1-f4 f7:f4 e3-c5 e7-g5

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . W W . . |        7 | . . . . W W . . |
    6 | W B B W . . . B |        6 | W B B W . . . B |
    5 | B B . . . . . . |        5 | B B . . . . . . |
    4 | . . . . . . . W |        4 | . . . . . . . W |
    3 | . . . W . . . . |        3 | . . B W . . . . |
    2 | W . W . W . . . |        2 | W . W . W . . . |
    1 | . B B B B W B . |        1 | . B B B . W B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

   9. e1-c3 a2-c4

 11   +208  a2-c4 g1-h2 e2-e4 b1-b4 e4:c6 h2-f4 e7:b4
 13   +196  a2-c4 g1-h2 e2-e4 c6:e4 a6-a8 e4-e6 f1:b5 h6:d6 d3:d6

 - if Black plays 9. g1-e3:
 11   +205  a2-c4 b1-b4 f1-f3 c1-f4 f7:f4 e3-c5 e7-g5
 13   +214  a2-c4 b1-b4 f1-f3 b4-b7 h4:h6 c6-a4 f7-g6 e1-f2 e7-c5

 - if Black plays 9. a5-c5:
 13   +203  a2-d2 c6:c2 a6-b7 g1-d4 f1-g2 h6-e6 h4-f6 e6:e2 f6:d4
 13   +226  a2-c4 b6-b3 f1-f3 h6:d6 h4-f4 d6:d3 f4-d2 c5-a5 f7-d7

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . W W . . |        7 | . . . . W W . . |
    6 | W B B W . . . B |        6 | W B B W . . . . |
    5 | B B . . . . . . |        5 | B B . . . . . . |
    4 | . . W . . . . W |        4 | . . W . . B . W |
    3 | . . B W . . . . |        3 | . . B W . . . . |
    2 | . . W . W . . . |        2 | . . W . W . . . |
    1 | . B B B . W B . |        1 | . B B B . W B . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  10. h6-f4 f1:f4

 11   +264  f1:f4 g1-e3 f4-f2 b1-b4 e7:b4 c1-b2 h4-g5
 11   +273  f7:f4 g1-e3 a6-b7 c1:f4 c4:f4 a5-a6 e7-c5
 13   +165  f7:f4 g1-e3 a6-b7 c1:f4 c4:f4 b6-d4 d6-b4 d4-f6 b4-d6
 13   +244  f1:f4 g1-e3 e7-g5 b1-b4 f4:b4 a5-d5 g5:d5 b5:d5 a6-a5

 - if Black plays 10. g1-h2:
 13   +173  e2-e4 c6:e4 a6-a8 e4-e6 f1:b5 h6:d6 d3:d6 h2-f4 d6:f4
 13   +175  e7-c5 h2:e2 h4-g5 c6-a4 f1-f3 a4:c4 f7-d5 h6-h7 d3-g3

 - if Black plays 10. c1-e3:
 11   +256  f1-f3 b1-a2 c2-e4 h6-f4 e7:e3 f4:d6 d3:d6
 13   +263  f1-f3 b1-a2 e7-g5 g1-d4 f3-d5 b5-b7 d6-e5 h6:h4 f7-e8

 - if Black plays 10. b1-b4:
 11   +272  e7:b4 g1-h2 f1-g2 c1-e3 h4-e4 b6-d4 f7-g7
 13   +284  e7:b4 c6-b7 f7-d7 h6:d6 b4:d6 b7-c6 a6-a8 b5-d5 a8-b8

 - if Black plays 10. a5-a3:
 13   +323  f1-f3 a3:d6 f7-d5 h6-f4 h4-f6 b1-b4 e7-e5 f4:c4 f3:c6

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . W W . . |        7 | . . . . W W . . |
    6 | W B B W . . . . |        6 | W B B W . . . . |
    5 | B B . . . . . . |        5 | B B . . . . . . |
    4 | . . W . . W . W |        4 | . . W . . W . W |
    3 | . . B W . . . . |        3 | . . B W B . . . |
    2 | . . W . W . . . |        2 | . . W . W . . . |
    1 | . B B B . . B . |        1 | . B B B . . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  11. g1-e3 e7-g5

 11   +202  f4-f2 a5-c5 a6-b7 b5-d5 b7-c8 c1-b2 f2:b2
 11   +244  e7-g5 b1-b4 f4:b4 a5-d5 g5:d5 b5:d5 a6-a5
 13   +229  e7-g5 b1-e1 f7-e7 e3:e7 g5-d2 e7-e4 h4-f2 c3-d4 f4:c1

 - if Black plays 11. a5-a3:
 11   +248  h4-g3 g1:g3 f7-d5 a3:d6 f4-f3 b5:d5 a6-a5
 13   +290  h4-g3 g1:g3 f7-d5 b5:d5 c2-f5 c3-b2 c4-e4 d5:f5 a6-a4

 - if Black plays 11. b1-b4:
 11   +421  e7:b4 d1-a1 a6-b7 g1-e3 f4-f2 b5-d5 h4-g5
 13   +465  e7:b4 g1-g2 f7-f5 c6-e4 f4-d2 g2-g3 e2:e4 g3:d3 e4-d5


 Darse:  At this point the game was automatically declared a forfeit
 because Ragnar overstepped the time limit of 10-weeks for the game
 (he had met the minimum requirement of one move per week, but forgot
 about the restriction on total time).  I immediately requested that
 the game be reinstated, and play resumed one week later.

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . . W . . |        7 | . . . . . W . . |
    6 | W B B W . . . . |        6 | W B B W . . . . |
    5 | B B . . . . W . |        5 | . B . B . . W . |
    4 | . . W . . W . W |        4 | . . W . . W . W |
    3 | . . B W B . . . |        3 | . . B W B . . . |
    2 | . . W . W . . . |        2 | . . W . W . . . |
    1 | . B B B . . . . |        1 | . B B B . . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  12. a5-d5 a6-a5

 11   +227  g5:d5 c1:f4 d6:f4 b5:d5 a6-a5 d1-f1 h4-g5
 11   +228  h4-e4 b6-d4 a6-a5 b1-e1 f7-f5 c1-b2 f5-b1
 11   +241  a6-a5 b1-b4 f4:b4 c6-e4 d6:b6 c1-f4 b6-d4
 11   +264  d6-c5 d1-g1 a6-a5 b6-d6 a5:c3 d6:d3 f7-f5
 13   +294  d6-c5 c6-e4 a6-b7 c3-d2 c2-c6 b6-b2 c5:e3 b2:e2 h4-f6
 13   +295  a6-a5 b1-e1 f7-f5 c6-e4 d6:b6 e3-c5 g5-d2 c3-d4 h4-g5
 15   +348   ...   ...   ...   ...   ...   ...   ...   ...   ...   ...   ... 

 Darse: White has many attractive options.  The sudden increase with
 a deeper search is usually indicative of mate threats on the horizon.
 When this occurs, the position is often provably lost, regardless of
 what defence is played.

 - if Black plays 12. b1-e1:
 13   +229  f7-e7 c1-b2 e2:b2 e1-b4 e7:b4 e3-e4 g5-e3 e4-e6 c4:e6

 - if Black plays 12. b1-b4:
 13   +261  f4:b4 a5-d5 a6-b7 b5-e5 f7-f8 e5:e2 c2:e2 e3-c5 g5:d5
 15   +294  f4:b4 a5-d5 f7-f6 b5-e5 a6-a5 c6-e4 b4:b6 c1-f4 f6:f4 d1-c1 e2-d1

 - if Black plays 12. b1-a2:
 13   +205  a6-b7 a5-a3 h4-f6 e3-c5 f4:c1 a3:d3 f6-d4 b5-d7 g5-g6
 13   +222  h4-f6 b6-d4 f6-h4 c6-a4 f4-f6 c1-f4 a6-b7 d1-c1 h4-e7

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . . W . . |        7 | . . . . . W . . |
    6 | . B B W . . . . |        6 | . B B W . . . . |
    5 | W B . B . . W . |        5 | W . . B . B W . |
    4 | . . W . . W . W |        4 | . . W . . W . W |
    3 | . . B W B . . . |        3 | . . B W B . . . |
    2 | . . W . W . . . |        2 | . . W . W . . . |
    1 | . B B B . . . . |        1 | . B B B . . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  13. b5-f5 h4-e4

 11  +4424  h4-e4 b1-e1 a5-a4 c3-d4 a4:d1 f5-e6 c2:c6
 13  +7010  h4-e4 b1-e1 a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 c6-f6
 15 +32000  h4-e4 b1-e1 a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 c6-f6 c5:g5 f4-d4

 Darse:  I didn't expect this so soon, but Mona now has a proven win
 in at most six more moves each.  The search indicates mate at 15-ply,
 but it is actually only 13-ply away.  The program can sometimes miss
 a shorter mate because of a search technique called Null Move search.
 This is gladly accepted in exchange for huge reductions in the total
 number of positions that need to be examined at a given search depth.
 Note that while it may miss a quicker mate, it never reports a mate
 that doesn't actually exist.

 Some of the main lines after 13... h4-e4 are as follows:

 b1-b3 d6-g6 c1-e1 e2-b5++
 b6-d4 a5:c3 c6-d7 d6-c5 b1-e1 f7-g6++
 e3-c5 a5:c3 c5:g5 f7-e7 b6-c5 e2-e5++
 e3-c5 a5:c3 c1:f4 c4:f4 b1-b3 d6-g6++
 b1-e1 a5-a4 d5:g5 f7-d5 g5:d5 d6-c5 c1:f4 a4:c6++
 b1-e1 a5-a4 f5-e6 a4:c6 b6-b5 f7-f5 b5:f5 d6-c5++
 b1-e1 a5-a4 b6-d4 a4:d1 c6-d7 d6-c5 c3-e5 f7-g6++
 b1-e1 a5-a4 e3-c5 a4:d1 c1:f4 d6:f4 c5:g5 f7-e7 b6-d6 e7:g5++
 b1-e1 a5-a4 c3-d4 a4:d1 f5-e6 c2:c6 e1-d2 g5-e5 c1:c4 f7-f5++
 b1-e1 a5-a4 c3-d4 a4:d1 f5-e6 c2:c6 d5-f5 d6-c5 f5:c5 f7-f5 c5:f5 c6-c3++
 b1-e1 a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 f1:f5 c3-d4 d6-g6 c1:f4 c6-f6++
 b1-e1 a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 f1:f5 c1:f4 c6-f6 b6-d4 e2-e5++
 b1-e1 a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 f1:f5 c1-b2 f7-e7 a2-c4 e2-e6++


 Although 13. b5-f5 wasn't the best move, the position is difficult,
 and probably can't be saved, as indicated by the following results.

 - if Black plays 13. e3-c5:
 11 +32000  a5:c3 b1-b4 c2-e4 c5:g5 f7-f5 b5:f5 d6:b4 c1:f4 h4-g3 f4-f6 g3-f4

 - if Black plays 13. c6-e4:
 13  +2609  a5:c3 b6:d6 g5:d5 c1:f4 f7-f5 d6-e6 c3-d4 f4-g3 c4-c6
 15  +6626   ...   ...   ...   ...   ...   ...   ...   ...   ...   ...   ... 

 - if Black plays 13. b1-e1:
 11   +295  f7-f5 c6-e4 d6:b6 e3-c5 g5-d2 c3-d4 h4-g5
 13   +382  f7-f5 c6-e4 f5-f3 e3-c5 g5-d2 b6-b4 f3:c3 c1-b2 h4-g5
 15   +478   ...   ...   ...   ...   ...   ...   ...   ...   ...   ...   ... 

 - if Black plays 13. b1-b4:
 13   +348  d6:b4 c6-e4 h4-f6 d1-b1 d3:d5 b6-d4 b4-c5 c3:f6 f7-e8
 15   +485  d6:b4 c6-e4 h4-f6 d1-b1 b4-c5 c3-e5 d3:d5 e3-d3 d5:d3 b1-b4 d3-d4

      +-----------------+
    8 | . . . . . . . . |
    7 | . . . . . W . . |
    6 | . B B W . . . . |
    5 | W . . B . B W . |
    4 | . . W . W W . . |
    3 | . . B W B . . . |
    2 | . . W . W . . . |
    1 | . B B B . . . . |
      +-----------------+
        a b c d e f g h  

  14. Resigns

 Ragnar:  Well, of course I believe a silicon brain. :)  I have to admire
 your programming and evaluation-function-finetuning skills -- Mona has
 cruised unbeaten through the entire tournament, and she was up against
 jarrausi, who is IMHO one of the very best LoA players there is!

 The depressing(?) conclusion of this outcome is that LoA must be a much
 simpler game than chess, since even Deep Blue is far from beating the
 world champion in a correspondence chess game, but you have in less
 than five years of serious LoA competition (on this server) created an
 (in practice) unbeatable program!


 Darse:  Well, we have to consider that millions of humans have been
 playing chess over hundreds of years, and a large body of knowledge
 about the game has been built up.  In contrast, only a few thousand
 people have played LoA since its invention in the 1960s, so naturally
 there are no "grandmasters" yet (although I think Jorge is definitely
 master calibre, at least).


 Ragnar:  Still, what you have achieved is no mean feat -- my
 admiration to the skillful lady and her ingenious creator.  :)


 Darse:  Thanks for the kind words.  Hopefully Mona can make some
 significant contributions to LoA, and help popularize the game.


 Remaining moves of one of the principle variations:

      +-----------------+
    8 | . . . . . . . . |
    7 | . . . . . W . . |
    6 | . B B W . . . . |
    5 | W . . B . B W . |
    4 | . . W . W W . . |
    3 | . . B W B . . . |
    2 | . . W . W . . . |
    1 | . . B B B . . . |
      +-----------------+
        a b c d e f g h  

  14. b1-e1 a5-a4

 11  +7010  a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 c6-f6 c5:g5 f4-d4 b6-c7 f1:f5
 13 +32000  a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 c6-f6 c5:g5 f4-d4 b6-c7 f1:f5 c1-e3 d6-c5

 Darse:  The shorter mate that was missed because of Null Move was:

 11 +32000  a5-a4 d1-a1 a4:c6 e3-c5 c4-f1 a1-a2 f1:f5 c3-d4 f7-e7 b6-b5 c6-e6

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . . W . . |        7 | . . . . . W . . |
    6 | . B B W . . . . |        6 | . B B W . . . . |
    5 | . . . B . B W . |        5 | . . . B . B W . |
    4 | W . W . W W . . |        4 | W . W B W W . . |
    3 | . . B W B . . . |        3 | . . . W B . . . |
    2 | . . W . W . . . |        2 | . . W . W . . . |
    1 | . . B B B . . . |        1 | . . B B B . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  15. c3-d4 a4:d1

  9 +32000  a4:d1 f5-e6 c2:c6 d5-f5 d6-c5 f5:c5 f7-f5 e6:c4 g5-d5

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . . W . . |        7 | . . . . . W . . |
    6 | . B B W . . . . |        6 | . B B W B . . . |
    5 | . . . B . B W . |        5 | . . . B . . W . |
    4 | . . W B W W . . |        4 | . . W B W W . . |
    3 | . . . W B . . . |        3 | . . . W B . . . |
    2 | . . W . W . . . |        2 | . . W . W . . . |
    1 | . . B W B . . . |        1 | . . B W B . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  16. f5-e6 c2:c6

  7 +32000  c2:c6 d5-f5 d6-c5 f5:c5 f7-f5 e6:c4 g5-d5

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . . W . . |        7 | . . . . . W . . |
    6 | . B W W B . . . |        6 | . B W W B . . . |
    5 | . . . B . . W . |        5 | . . . . . B W . |
    4 | . . W B W W . . |        4 | . . W B W W . . |
    3 | . . . W B . . . |        3 | . . . W B . . . |
    2 | . . . . W . . . |        2 | . . . . W . . . |
    1 | . . B W B . . . |        1 | . . B W B . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  17. d5-f5 d6-c5

  5 +32000  d6-c5 f5:c5 f7-f5 e6:c4 g5-d5

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . . W . . |        7 | . . . . . W . . |
    6 | . B W . B . . . |        6 | . B W . B . . . |
    5 | . . W . . B W . |        5 | . . B . . . W . |
    4 | . . W B W W . . |        4 | . . W B W W . . |
    3 | . . . W B . . . |        3 | . . . W B . . . |
    2 | . . . . W . . . |        2 | . . . . W . . . |
    1 | . . B W B . . . |        1 | . . B W B . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  18. f5:c5 f7-f5

  3 +32000  f7-f5 d4-d7 f5:c5

      +-----------------+          +-----------------+
    8 | . . . . . . . . |        8 | . . . . . . . . |
    7 | . . . . . . . . |        7 | . . . . . . . . |
    6 | . B W . B . . . |        6 | . B W . B . . . |
    5 | . . B . . W W . |        5 | . . . . . B W . |
    4 | . . W B W W . . |        4 | . . W B W W . . |
    3 | . . . W B . . . |        3 | . . . W B . . . |
    2 | . . . . W . . . |        2 | . . . . W . . . |
    1 | . . B W B . . . |        1 | . . B W B . . . |
      +-----------------+          +-----------------+
        a b c d e f g h	             a b c d e f g h  

  19. c5:f5 c6-c3++

    1 +32000  c6-c3

      +-----------------+
    8 | . . . . . . . . |
    7 | . . . . . . . . |
    6 | . B . . B . . . |
    5 | . . . . . B W . |
    4 | . . W B W W . . |
    3 | . . W W B . . . |
    2 | . . . . W . . . |
    1 | . . B W B . . . |
      +-----------------+
        a b c d e f g h