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Jun1005   crankydoodle: After studying a lot of positions, you kind of get the feeling for which move to look at first. I caught on to the 27...Rxh2+ pretty quickly, but the entire variation takes some time. In any case, Black has a nice mating net after the move, so I kind of cheated and went with Rxh2+ without that many calculations:P 

Jun1305   patzer2: Here is an analysis with the ChessGames.com Opening Explorer and Fritz 8: <1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Bxc3+ 6. bxc3 c5 7. Nf3 Qa5 8. Bd2
Bd7 9. Be2> This was a novelty when it was played in this game. <9...Ba4>
Worthy of consideration is 9...Nbc6 as in Balashov vs I Naumkin, 1991 <10. OO c4 11. Ng5 h6 12. Nh3 Nbc6
13. f4 OOO 14. g4?!> This is a little too loosening. Better is 14. Rb1!, when
play might have continued 14... Nf5 15. Nf2 Kb8 16. Bh5 Rhf8 17. Bg4 Ka8 18. Re1 Rb8
19. Qc1 Nce7 20. Nd1 Rg8 21. Ne3 Nxe3 22. Rxe3 with White holding a small edge.
<14...f5 15. exf6 gxf6 16. f5 e5 17. Be1 Kb8 18.
Qc1 Nc8!> With this subtle maneuver, Black begins to undermine White's weak
and overextended pawns. <19. dxe5> No improvement for White is 19. Rb1 Nd6
20. Bf3 Rh7 21. Kh1 Rg8 22. Bg3 h5 23. gxh5 Nxf5 24. dxe5 fxe5 25. Qd2 Nxg3+
26. hxg3 Nd4 27. Bd1 Rxg3 28. Rf8+ Kc7 29. Nf4 Bd7 30. Qe1 exf4 31. Qe5+ Kc6
32. Qxd4 b6 33. Rxf4 Rhg7 34. Rf3 Qxa3 35. Rxg3 Rxg3 36. Qf6+ Qd6 37. Qxd6+
Kxd6 <19... fxe5 20. Kh1 Nd6 21. g5 hxg5 22. Nxg5 Rdf8 23. f6 d4>
Black has an easier and more straight forward win after 23... Rh6! 24. f7 Qd8 25. Qd2
Qe7 26. Bf2 (26. Qxd5?? Qxg5 ) 26... d4 27. cxd4 c3 28. Qc1 (28. Qxc3?? Qxg5
29. dxe5 Ne4 30. Qf3 Nxe5 31. Qxe4 Bc6 ) 28... Nxd4 29. Bxd4 exd4 30. Bg4
Rg6 31. h4 Rh6 32. Qf4 Rxh4+ 33. Kg2 Bxc2 <24. cxd4 Qd5+ 25. Bf3 e4 26.
Nxe4 Nxd4 27. Bg2> Also failing for White is 27. Bg3 Nxf3! 28. Qf4 (28.
Rxf3 Qxe4 ) 28... Ka8! (28... Qxe4?? 29. Qxe4 ) 29. Nc3 Qh5
30. Qxf3! Qxf3+ 31. Rxf3 Bc6! 32. Bxd6 Rxf6 33. Raf1 (33. Be5? Rxf3 34. Bxh8??
Rf1#) 33... Bxf3+ 34. Kg1 Rxd6 35. Rxf3 <27... Rxh2+!!> is the daily puzzle solution
<28. Kxh2 Rh8+ 29. Bh3> If 29. Kg1??, then 29...Ne2+ wins for Black. <29... Rxh3+!>
An interesting but much less effective
alternative for Black is 29... Bd7!? 30. Qf4
Rxh3+ 31. Kg2 Ka8! 32. f7! Nxf7 33. Rd1! Rh5 34. Rf3! Rf5 35. Qg3 Qxe4
36. Rxd4 Qe2+ 37. Qf2 Rg5+ 38. Kh1 Qe6 39. Rg3 Rh5+ 40. Kg1 Qe8 41. Re3 Ne5 42.
Qg3 Rh3 43. Rxe5 Rxg3+ 44. Bxg3 Qg6 45. Re3 Qb6 46. c3 Bc6 47. Kf1 Qb1+ 48. Re1
Qf5+ 49. Bf4 a5 <30. Kxh3 Bd7+> 01 and White resigned. Play might have continued
31. Kh2 [31. Kg3 Nxe4+ 32. Kg2 Nd2+ 33. Kh2 (33. Kg1 Ne2+; 33. Kg3 Ne2+) 33... Qh5+ 34. Kg2
Qh3+ 35. Kf2 Ne4+ 36. Kg1 Ne2#] 31... Qh5+ 32. Kg3 (32. Kg1 Ne2+) 32... Qg4+
33. Kh2 [33. Kf2 Qf3+ 34. Kg1 Ne2+ 35. Kh2 Qh3#] 33... Qh3+ 34. Kg1 Ne2+ 35.
Kf2 Nxe4+ 36. Kxe2 Bg4+ 37. Rf3 Qxf3# 01


Nov1215   Nick46: Hi, this is a difficult one. 

Nov1215   stacase: I would have moved 29...Bd7 but then what do I know?


Nov1215   greed and death: I didn't get this. I tried 29... Nxe4 at first, but it soon became obvious that wouldn't work because with the knight pinned to the queen, the gain of a piece would only be temporary in almost all lines (except those with 30. Kg1??) and Black gets no positional advantage. After that I tried moves like 29... Ne2, but didn't get anywhere with them and completely missed the game line. Thus ends my perfect week. 

Nov1215
  al wazir: I saw the first ♖ sac, the obvious first move, but not the rest of the combination, and I might have played it OTB, but it would have been speculative. No way would I have gone for the second ♖ sac. I didn't see a winning continuation. I still don't, even after 30...Bd7+. 

Nov1215   khense: It's not like a little light flashes on the board when one side has a winning move. It really helps a lot to be told that one is there. 

Nov1215   morfishine: <27.Rxh2+> does the trick 

Nov1215   galdur: I was pondering this position on the comp at the pub which attracted the attention of some bloke. So, he borrowed a set at the bar and soon produced this cute line 27.. Rxh2+ 28. Kxh2 Rh8+ 29. Bh3 Rxh3+ 30. Kxh3 Bd7+ 31. Kg3 Nxe4+ 32. Kf4 Ne2+ 33. Ke3 Qe5 34. Kxe2 Nd2+ 35. Kxd2 c3+ 36. Kd1 Qh5+ 37. Rf3 Qxf3# click for larger viewAt any rate it´s an easy win after 30.. Bd7+ 

Nov1215   saturn2: I got it rather quickly. The main theme is the knightfork on e2 by which black gets the queen for rook and knight at the end of the day. If white interposes the bishop after the second rook check black has 30 ..Bd7 and it will be over soon. 

Nov1215   patzer2: Didn't remember the winning demolition 27...Rxh2+!! (17.23 @ 20 depth, Deep Fritz 14) from 10 years ago, and went wrong with 27...Ne2? on today's Thursday puzzle. My weak 27...Ne2? is refuted by 28. Qd1! when Deep Fritz 14 indicates play might continue 28...Rxh2+ 29. Kxh2 Rh8+ 30. Bh3 Rxh3+ 31. Kxh3 Bd7+ 32. Kg2 Qxe4+ 33. Rf3 Nd4 34. c3 Nxf3 35. Qxf3 Qg6+ 36. Kf1 Bc6 37. f7 Nxf7 38. Qg3+ Qxg3 39. Bxg3+ (+1.40 @ 27 depth). The second best alternative is 27...Nxe4 =, when Deep Fritz 14 indicates play might continue 28. Qf4+ Ka8 29. Qxe4 Qxe4 30. Bxe4 Bxc2 31. Bxc2 Nxc2 32. Rc1 Ne3 33. Rf3 Ng4 34. Rf4 Ne5 35. Bb4 Nd3 36. Bxf8 Rxf8 37. Rfxc4 Nxc1 38. Rxc1 a6 39. h4 Rxf6 40. Kg2 b5 41. h5 a5 42. Rc5 Rb6 43. Kf3 Kb7 = (0.00 @ 27 depth). P.S.: This is one of those complicated positions (e.g. 27...?) where either you find a deep winning tactical solution with a move like 27...Rxh2+!!, or have to settle for relatively quiet equality with a move like 27...Nxe4 or, even worse, risk losing with a weaker move (i.e. like 27...Ne2?). 

Nov1215   RandomVisitor: After 25...e4:
click for larger viewKomodo9.264bit:
<0.05/30 26.Bg2> Bxc2 27.Bg3 Bd3 28.Qf4 Ka8 29.Rad1 Bxf1 30.Rxf1 c3 31.Nxe4 Nxe4 32.Qxe4 Qxe4 33.Bxe4 Nxd4 34.Bd6 c2 35.Bxf8 Rxf8 36.Rc1 Rxf6 37.Bxc2 a6 38.Bd1 Rf4 39.Kg2 Ka7 40.Kg3 Rf1 41.Kg2 Re1 42.h4 Nf5 43.Kf2 Rh1 44.h5 Rh2+ 45.Kg1 Rh3 46.Rc5 

Nov1215
  whiteshark: In a Station of the Game
The apparition of these pieces in the crowd;
Petals on a wet, black bough. 

Nov1215   CHESSTTCAMPS: White has the bishop pair plus an extra fpawn that is advanced, protected, and passed. White threatens 28.Qf4, pinning Nd6 and protecting h2. White can meet 27... Nxe4 with 28.Qf4+, regaining the piece with an active position. This suggests that black should employ the hfile attack ASAP: 27... Rxh2+!! 28.Kxh2 (Kg1 Rxg2+ 29.Kxg2 Qxe4+ wins quickly) Rh8+ and now: A.29.Kg1 Ne2+ 30.Kf2 Nxc1 31.Rxc1 Nxe4+ 32.Ke2 (Ke3 Qg5+ skewers and forks) Nc3+! 33.Bxc3 Qxg2+ is winning (Rf2 Re8+) A.1 31.Nxd6 Rh2! 32.Rg1 Bc6! 33.Rxc1 Rxg2+ 34.Rxg2 Qxg2+ 35.Ke3 Qf3+ 36.Kd2 Qf4+ picks up knight with a winning material advantage. B.29.Kg3 Ne2+ 30.Kf3 (30.Kg4 Qh5#; 30.Kf2 transposes to A) Nxc1 31.Rxc1 Qxe4+ is easier than A for black. C.29.Bh3 Rxh3+!! 30.Kxh3 Bd7+ 31.Kg2 (Kh4 Qxe4+ 32.Qf4 Qh7+! 33.Kg3 Ne2+ wins queen) Qxe4+ 32.Kh2 Qh7+ 33.Kg2 (Kg1 Ne2+) Qh3+ 34.Kf2 Nxe4+ 35.Kg1 Ne2# Line C is hard to find  time for review... 

Nov1215   dfcx: white has an extra pawn, If black takes the knight, white can get it back with Qf4+. On the other hand, the open H file invite 27...Rxh2+ 28.Kxh2 Rh8+
A. 29.Kg1/Kg3 Ne2+ forks
Avoiding the fork is even worse.
B. 29.Bh3 Rxh3+ 30.Kxh3 Bd7+
Now it's hard for white to defend.
B1. 31.Kg2 Qxe4+ 32.Kf2 (Rf3 Qxf3+) Qf3+ 33.Kg1 Nf2+
B2.31.Kh2 Qh5+ 32.Kg2 (Kg1 Ne2+) Qh3+ 33.Kf2 Nxe4+ 34.Kg1 Ne2# 

Nov1215   CHESSTTCAMPS: In line C, I initially favored 29... Bd7 first, but didn't like 30.Qf4. In a tournament time control, I'd likely have overstepped or blundered. 

Nov1215
  devere: 27. ... Rxh2+ 28. Kxh2 Rh8+ 29. Bh3 Rxh3+ 30. Kxh3 Bd7+ 31. Kh4 Qxe4+ 32. Qf4 Qh7+ and the White queen will be lost to a knight fork. click for larger view 

Nov1215   varishnakov: Okay, so I saw all the way to the point at which white resigned, but is that sufficient? There were so many lines, I don't know how far to actually look, rather than to just call it and say black should have a crushing attack. I never saw to mate or material gain. This is very difficult for a Thursday in my opinion, soooo many different possible lines. 

Nov1215
  kevin86: The rooks are saced on the hfile to set up a crushing mate by bishop and queen. 

Nov1215   BOSTER: < mizer:I dont think this puzzle is hard>.
When you double rook sacr , you have to
be sure that you can mate the king.
Or you can lose your< miser>. 

Nov1215   dark.horse: I got this wrong, also. In the final position White has two rooks and a knight for two knights, yet he's busted. It's a talent to visualize & determine that Black has a winning position after the rook sack at move 27. 

Nov1215
  agb2002: Black has a knight for a bishop and a pawn.
White threatens 28.Bg3 N4f5 29.Bxd6+ Nxd6 30.Qf4 followed by Rad1. The white knight is hanging but after 27... Nxe4 28.Qf4+ White does not seem to end up worse. For example, 28... Qd6 29.Bxe4 (29.Qxe4 Qxh2#) 29... Rxf6 30.Qxd6 (30.Qxf6 Qxh2#) 30... Rxd6 31.Bg3 wins for White. Another idea is to try to expose the white king with 27... Rxh2+: A) 28.Kxh2 Rh1+
A.1) 29.Bh3 Rxh3+
A.1.a) 30.Kxh3 Bd7+
A.1.a.i) 31.Kg2 Qxe4+ looks winning. For example, 32.Kh2 Qh7+ 33.Kg2 Qh3+ 34.Kf2 Ne4+ 35.Kg1 Ne2#. A.1.a.ii) 31.Kh2 Qh5+ 32.Kg2 Qh3+ 33.Kg1 (33.Kf2 Nxe4+ 34.Kg1 Ne2#) 33... Ne2+ 34.Kf2 Nxe4+ 35.Kxe2 Bg4+ 36.Rf3 Qxf3#. A.1.a.iii) 31.Kg3 Nxe4+ 32.Kh4 (32.Kh2 Qh5+ and mate soon) 32... Nf5+ seems to win. For example, 33.Rxf5 Qxf5 with the triple threat Qh3#, Qg4# and Qh7+ and mate next. A.1.a.iv) 31.Kh4 Qxe4+ looks winning. For example, 32.Qf4 Qh7+ and a knight for will win the queen. A.1.b) 30.Kg2 Qxe4+ 31.Kxh3 Bd7+ is similar to A.1.a. A.1.c) 30.Kg1 Qxe4 wins decisive material.
A.2) 29.Kg1(3) Ne2+ wins decisive material.
B) 28.Kg1 Rxg2+ 29.Kxg2 Qxe4+ wins material and gets a winning attack. I haven't found more time for this puzzle today. 

Nov1215
  Penguincw: I attempted this puzzle earlier today, but decided not to comment, until now. Anyway, the king can't go to g1, because of a fork, so in all variations, assume Kg1 is not an option. I got 27....Rxh2+ 28.Kxh2 and rather 28...Rh8+ or 28...Qh5+. 

Nov1215   YouRang: Looks like ...Rxh2 Kxh2 will eventually lead to a ...Ne2+, forking K and Q . 

Nov1215   Bruce Graham: Farago's fandango. 



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