02 Juni 2018:
Persoonlijk Kampioenschap Leidse Schaakbond

Bij het Open PK van de LeiSB doen drie DDers in de B-groep mee: Theo van Orsouw, Niels Engelen en Auke de Vries. Niels Engelen heeft zijn partij uit de derde ronde tegen ratingfavoriet Marco de Mooij van commentaar voorzien.
chess pgn
[Event "LSG_Open"][Site "?"][Date "2018.06.01"][Round "3"][White "Mooij,de, Marco"][Black "Engelen, Niels"][Result "0-1"][ECO "B02"][WhiteElo "1904"][BlackElo "1541"][Annotator "User"][PlyCount "60"][EventDate "2018.??.??"]{I played this game at the Leiden open tournament. And because of the ratinggap between the players I would be happy to have a draw} 1. e4 d5 {I playedthis move just like against Hennink the day before.} 2. exd5 Nf6 3. Nc3 Nxd5 4.Bc4 Nxc3 {But what I said before. For me a draw was just enough. So I went fora more calmer line.} (4... Nb6 {This is the main variation. And such move youalso see for example in the English opening.} 5. Bb3 Nc6 6. Nf3 Bf5 7. O-O e6)5. Qf3 e6 6. Qxc3 Nd7 {Preparing Queen f6 - to exchange Queens.} 7. Nf3 Qf6 8.Qxf6 ({But I was expecting:} 8. d4 h6 {Because of Bishop g5} 9. O-O Bd6 10. Bd2O-O ({Or:} 10... Nb6 {I think the bishop on the diagonal: b1-h7 will be moreactive then on the a2-g8 diagonal.} 11. Bd3 (11. Bb3 Bd7 12. a4 O-O-O))) 8...Nxf6 9. d4 Bd6 {For preventing bishop f4} 10. Bd2 $146 ({I think this is moresolid:} 10. O-O O-O 11. Re1 h6 {for preparing rook d8} 12. Bb3 b6 13. Ne5 Bb7 14. Bf4 Rfd8 15. Rad1 Nd7 16. Bg3 Bxe5 17. Bxe5 Nxe5 18. Rxe5 Rd6 19. c3) 10...Ne4 11. Be3 O-O 12. O-O-O {Now for white the difficult choice of castle shortor long?} (12. O-O b6 13. d5 {This will close the position. and you will get amore static position. What I personaly don't like.} ({this move is much better.just calm solid move.} 13. c3 Bb7 14. Rad1 Nf6 {This move has to come at somemoment anyway. Because the knight wants to go to d5.} 15. Rfe1 Rfd8 $11 {The rooks has to come to the half open lines: d8 and c8. The rook onf c8,because of preparing c5.}) 13... e5) {because at some moment black wants toplay b5} 12... c6 (12... b6 {This is better. Because of directly developingthe bishop. But of knight e5 I was a bit worried about the light squares.} 13.Ne5 Bb7 14. Bb5 Nf6 15. Bc6 Bxc6 16. Nxc6 Nd5 17. Bd2 a5 $11) 13. Rhe1 Nf6 14.Ne5 Nd5 15. Bd2 Bc7 {black could of couse play f6 directly. What my firstintention was. But some how I had the pawn move a5, a4, a3 in mind. But bishopa5 for white would be prevent this.} (15... f6 16. Nd3 {[%csl Gb4,Gc5] Andthis will be a better place for the knight, because from this place the knightis more flexible. It has squares like: b4 or c5} (16. Nf3 {Or a other varionis for example this:} b5 17. Bb3 a5 18. a4 Bd7 19. axb5 cxb5 $15 {And blackget's more space.}) 16... a5 17. Nc5 b5 18. Bxd5 exd5 19. Re2 Bf5 20. Rde1) 16.Bb3 {But with the text move, the target of black becomes more clear then ever!Now a5, a4 is realy an option :)} a5 17. c3 ({I was expecting:} 17. a4 {Because the bishop will stay on the diagonal: a2-g8}) 17... f6 {This move hasto come anyway at some moment.} 18. Nf3 (18. Nd3) 18... a4 19. Bc2 a3 $2 {This pawn setup you will see a lot. And I was just thinking about the gamethat I played at the Kennemer open tournament a month ago. The opening was aPetroff. But with a similar same pawn setup. But in that game the Queens werestill on the board. So with the text move black will isolate the pawn.} (19...b5 {Of cours much better. Solid move.}) 20. b3 ({This I had in mind:} 20. c4axb2+ 21. Kxb2 Nb6 22. Bb3 {Because white can't play now c5 because thenknight d5 comes again. And I think black is just fine.}) 20... b5 {The sametheme, but the wrong moment!} 21. b4 $2 Bd7 {Whoo. At least the bishop develops} 22. Bb3 Rfe8 23. Kc2 $15 {Black is standing a little bit better. Becauseblack have more space. and with black's next move he spoiled his advantage.}Bf4 $2 $11 {My instinct said that I had to play this move. But apparently itis a very weak move.} (23... Re7 {to double the rooks is much stronger.}) 24.Bxf4 Nxf4 25. g3 Nd5 26. Bxd5 {This I think is the right decision. Because thewhite bishop is locked up. and white's knight can become stronger, alsobecause of the lonely pawn on a3 - the knight can attack the pawn.} exd5 27.Rxe8+ Rxe8 28. Re1 $11 Bf5+ 29. Kb3 Be4 30. Nd2 $4 (30. Re3 $1 {This would bethe move!} Ra8 31. Nd2 Bf5 32. Re7 Kf8 33. Rc7 {But now the problem comes thatblack take over the open lines.} Bd3 {and this will be protecting both thepawns on d5 and b5} 34. Rxc6 Re8 35. Kxa3 Re2 {And black is pressing.personaly I would prefer black.}) 30... Bc2+ {And white resigned.} 0-1