"SHREDDER CHESS FREE" LOST THE COMBINATION

SHREDDER CHESS FREE is available on Google Drive.

One can choose between three different levels.

I used the level "Hard". You cannot make any mistakes against that program. 

However, this version can be won.

Unfortunately, it doesn't allow to save or copy the PGN notation of the game.

One cannot even to replay the game.

Eintalu - Shredder 1-0

[Event "?"]

[Site "Tallinn"]

[Date "2015-04-10"]

[Round "3"]

[White "Eintalu Juri"]

[Black "Shredder (Hard)"]

[Result "1-0"]

[Opening "French defence"]

[ECO "C02"]

     1.   e2-e4         e7-e6      

     2.  Ng1-f3         d7-d5      

     3.   e4-e5        Bc8-d7      

     4.   d2-d4        Nb8-c6    ?!

     5.   c2-c3         f7-f6      

     6.  Bf1-d3         f6xe5      

     7.   d4xe5        Bf8-c5    ?!

     8.     O-O        Ng8-e7    ?!

     9.   b2-b4        Bc5-b6      

    10.   a2-a4    ?!

 {Better was 10. b5 Na5 11. Ng5}

    10...              a7-a6      

    11.  Nb1-a3    ?!     O-O      

    12.   b4-b5         a6xb5      

    13.   a4xb5        Nc6-a5   

White to move

   

    14.  Bd3xh7+     

 {Perhaps it was better to play 14. Nc2 Nb3 15. Rxa8 Qxa8 16. Ba3}

    14...             Kg8xh7      

    15.  Nf3-g5+       Kh7-g8      

 {After 15... Kg6? 16. Qg4 Qe8 17. h4! White has a strong attack.

For example, 17... Rh8? 18. Nxe6+ Kf7 19. Qxg7+ Kxe6 20. Qf6#}

    16.  Qd1-h5        Rf8-f5      

    17.   g2-g4    ?!

 {It was securer to play 17. Qh7+ Kf8 18. Nc2 .

For example, 18... Nc4 19. Rxa8 Qxa8 20. Nd4 with the unclear position, perhaps slightly better for Black.

But about what "security" we are talking about, if White has sacrificed the Bishop, the position has been simplified, and White cannot even threaten to give a checkmate?}

Black to move

    17...             Rf5xg5      

 {After 17... Rxe5 18. Qf7+ Kh8 19. Qh5+ White gives an eternal check.}

    18.  Bc1xg5        Na5-b3      

    19.  Bg5xe7      

 {Better was 19. Ra2 Qf8 20. Bxe7 Qxe7 21. g5 Ra4 22. c4 Nd4!}

    19...             Qd8xe7      

    20.   g4-g5       

Black to move

20...      Nb3xa1    ??

 {After 20... g6 21. Qxg6+ Qg7 22. Qxg7+ Kxg7 23. Ra2 Bc5 24. Rb1! White does not lose its piece.

Black missed a strong reply 20... Ra4!

For example, 21. c4 g6! 22. Qxg6+ Qg7 23. Qxg7+ Kxg7 24. Ra2 dxc4! and White's Knight on a3 is a meaningless piece.}

    21.   g5-g6        

Black to move

21...      Qe7xa3    ??

 {How greedy can Black be?

Now, Black has 3 extra pieces, but still loses the game.

Better was 21... Qe8!

For example, 22. Qh7+ Kf8 23. Qh8+ Ke7 24. Qxg7+ Kd8 25. Qf6+ Kc8 26. g7 Bxb5! 27. Nxb5 Kd7 and White's passed Pawn g7 has been stopped. Then, Black has an extra piece and a slightly better position.

However, after 24. Qh4+! White achieves the external check.}

    22.  Qh5-h7+       Kg8-f8      

    23.  Qh7-h8+       Kf8-e7      

    24.  Qh8xg7+       Ke7-d8      

    25.  Qg7-f6+   !   

Black to move

25...      Kd8-e8      

 {After 25... Qe7 26. g7 White still queens.}

    26.   g6-g7        Bb6xf2+     

    27.  Kg1-h1        Bd7-c8      

 {Or 27... Bxb5 28. g8Q+ Qf8 29. Qfxe6+}

    28.   g7-g8=R+   

            1-0