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Up Topic The Rybka Lounge / Test Positions / Is 28. ...Nh4 a winner?
- - By ghost (**) Date 2011-03-12 21:19 Edited 2011-03-12 22:02
When analyzing a game of mine I reached the following position:

1b3rk1/5p1p/1P2b2q/1Q1p1n2/2pP4/2P1PBP1/1N3P1P/5RK1 b - - 0 28


I made some short analysis on my Laptop. And it seems that 28. ... Nh4!! is winning for black.

My short analysis:

28... Nh4!! 29. gxh4 (29. Bh1 Kh8 30. Ra1 (30. Rc1 Rg8 31. b7 Qf6!)30... Rg8
31. Qc5 Qf6!) 29... Kh8 30. h5 (30. Rc1 Bh3)(30. Rd1 Bh3) 30... Rg8+

Can somebody of you  with bigger hardware confirm that 28 ... Nh4 is a winner? And if this is the case can any engine find this move?

EDIT: At the moment i have serious trouble to make progress for black in the lines after 28... Nh4!! 29. Bh1 Kh8 30. f4!
Parent - By mocha1961 (***) Date 2011-03-12 22:25
it is a draw line. repetition

Nh4 29.Bh1-Qh5 30.Nxc4-Qe2 31.Na3-Nf3+ 32.Kg2-Ne1+ 33.Kg1-Nf3+ 34.Kg2-Ne1+ 35.Kg1-Nf3+ 36.Kg2-Ne1.
Parent - By Moz (****) Date 2011-03-13 03:33
Very interesting position! Thank you for posting it.

I am sure an unassisted engine would draw by repetition even on big hardware but this is one of those positions where the human touch can have a big impact. I suspect there's some magic lurking in this position!
- By Moz (****) Date 2011-03-13 04:10
This is by no means forced but I think it shows just how complex this position is and how the position can simplify in black's favor if the conditions are right.
[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[FEN "1b3rk1/5p1p/1P2b2q/1Q1p1n2/2pP4/2P1PBP1/1N3P1P/5RK1 b - - 0 1"]
[SetUp "1"]

1... Nh4 2. Bh1 Kh8 3. f4 Rg8 4. Rf2 Qh5 5. Qc6 Rg6 6. Qc5 Kg7 7. Qa5 Bh3 $1 
8. Qxd5 Nf5 9. Bf3 Nxg3 10. hxg3 Qh4 11. Rg2 Bxg2 12. gxh4 Bxf3+ 13. Qg5 Rxg5+
14. fxg5 Bd5 15. Kf2 Kg6 16. e4 Bxe4 17. Nxc4 Kh5 18. Ne5 Bxe5 19. dxe5 Kg4
20. Ke3 Bh1 21. c4 Bb7 22. c5 Kf5 23. Kd4 Ke6
Up Topic The Rybka Lounge / Test Positions / Is 28. ...Nh4 a winner?

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