John van der Wiel vs Gyula Sax (1983)

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John van der Wiel vs Gyula Sax
EUR-chT (Men) 8th (1983), Plovdiv BUL, rd 5, Jun-29
Sicilian Defense: Dragon Variation. Yugoslav Attack Modern Line (B76) · 1-0

ANALYSIS [x]

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Feb-22-13		mistreaver: 23... Ne8 (24... Qxe5 doesn't work because of 25 fxe5 Nxh7 26 Qxe6+ and Qxc8) 24 Rxg7+ and now A11) 24...Kh8 25 Qh6 mate A12) 24...Kf8 25 Rh7 and there is no defence against Rh8 mate for isntance 25... Bg8 26 Rh8 Nf6 27 Bxf6 A2)I think that the immediate b4 is far harder to refute: 21...b4 Perhaps now Ne4 could come into consideration A21)22 Ne4 and now: A211) 22... Nxe4 23 Bxf7 Kxf7 24 Qxg7+ Ke8 25 Rh8 Bg8 26 Rh8 mate A212) 22 ... Qxc2+ 23 Ka1 bxa3 iss too dangerous i would say, so Ne4 is not essential A22) after b4 what is the right move? 22 Bxf7+ perhaps playing with the same motiffs as in the A1 variation will bring benefit? A221) 22... Kxf7 23 Rh7 Nxh7 24 Qxg7+ Ke8 25 Qxh7 and i don't see a way to stop Qh8 with mate A222) 22... Bxf7 23 Rh7 and black can resign. A3)There is also the unsofisticated prophylaction: 21... Kf8 But i think that nevertheless 22 Bxf7 Bxf7 23 Rh7 and white should win. Phew, that was some analysis. Hope that at least some part of it is correct. Time to check. --- Okay, i failed to notice the best defence for black, my typical weakness.And also in my line A2) after 21...b4 22 Bxf7 gives dynamic balance, but 22 Rh7 is immediatelly decisive, as pointed out by rybka. Therefore only half a point for me today, making it poor 2.5/5 this week, with 2 hardest puzzles to come.

Feb-22-13		mistreaver: Hmm for some reason the first part of my post is missing, where i played 21 Bxg6 fxg6 22 Qxg6 b4 23 Rh7 with a win for white.

Feb-22-13		chrisowen: Yeah I've got it is your number! play the butter finger in con gee elephant he at 22...bf7 toast in for 23.rh8+ do the math I on elect wrong bullshine, in debatable of course 20.rb7 looses the dig it i 21.Bxg6 fg6 white fine fortuned, having look it ok 22.qxg6 at good game thod in to 22.bf7 hack ward in got 23.rh8+ a length in curly it who would have thought it oh in f7? go re f5 in tempt it fleece queen in away it off g-line, find alive spark king grateful it ole um cain bishops bamboo shoot for home straight in glesson it slide in son 23.rh8+ wreck keep plugging away it is rig 23...Kxh8 rook aint it rise 24.qxf7 lower stitching up betters in belows the neddy it trapped in f6 going to h5 heffalump only postpones the inevitable duck in knight flu flubber, choose vent h5 ills you white elephant sacrifice in feed 24...rg8 entombed flab band he advance in baggy it ok in garnering boat at acute 25.rh1+ or dervish in every 25.Bxf6 mate ghosts in for beings babushka, h7 h5 in temple afore in head bishop e5 success have clean in go paltry 26.Qh5 bend a leap in glibs balls 25.Nh7 pony etc hastens belt across wash in building some gall h5 come on what about in before o a clip in dilemma tempted ate in bin rookb7 bifocals vindicate a mind to speculate diffuse lick knightg4 rook toy, bf7 ridge at f5, g8 rook h1 neighin h7 at h5 golden chest goofed.

Feb-22-13		DarthStapler: I didn't get it

Feb-22-13		agb2002: The material is identical. Black threatens ... b4. The weakened black castle invites to play 22.Bxg6: A) 22... fxg6 23.Qxg6 (with the idea 24.Rh7 Nxh7 25.Qxg7#) A.1) 23... Bf7 24.Rh8+ Kxh8 25.Qxf7 A.1.a) 25... Qxe5 26.fxe5 Rf8 27.Rh1+ Nh7 28.Qg6 Kg8 29.Rxh7 Rf7 30.e6 wins. A.1.b) 25... Nh5 26.Rh1 Qxe5 27.fxe5, etc. A.2) 23... Rf8 24.Rh7 Rf7 25.Rd8+ and mate in two. B) 22... b4 23.Rh7 B.1) 23... bxc3 24.Bxf7+ Kxf7 (24... Kf8 25.Qxg7#; 24... Kxh7 25.Rd1+ and mate in two) 25.Qxg7+ Ke8 26.Rh8+ B(N)g8 27.Rxg8+ N(B)xg8 28.Qxg8#. B.2) 23... fxg6 24.Qxg6 Kf8 (24... Ne8 25.Rxg7+ wins) 25.Qxg7+ is similar to B.1. B.3) 23... Rd7 24.Bxf7+ is similar to B.1. B.4) 23... Qxe5 24.Bxf7+, etc.

Feb-22-13		Jack Kerouac: The Sax wasn't that good....

Feb-22-13		Jimfromprovidence: The real weakness with black at the puzzle position, below, is the overworked knight, but it's not obvious to see that. click for larger view When you look at the position without the g6 pawn present, the solution appears. click for larger view White has a forced mate beginning with Rh7, seeing ...Nxh7, then Qxg7+. That's why 21 Bxg6 in the puzzle position is necessary as the first move in the combination, as after 22 Qxg6 in the text, below, you can now see that Rh7 threat. click for larger view

Feb-22-13		ajk68: How does white stop 22...b4

Feb-22-13		snakebyt: I considered BxgPawn which I thought might allow the Queen to move in and threaten a Rook Queen headlock but the Bg guarding his King mucked up the works. So I chose 21 Ne4 which forks the blk Q and N. That looked great but fizzled out once I set up the board and played it out. Then I peeked.

Feb-22-13		morfishine: <ajk68> On your question: <How does white stop 22...b4> 23.Rh7

Feb-22-13		FSR: 21.Bxg6! seems extremely strong: (a) 21...hxg6 22.Qxg6 threatens 23.Rh7! This looks crushing. (i) If 22...Kh8, 23.Rh7! Nxh7 24.Bxg7+ forces mate. (ii) If 22...Bf7, 23.Rh8+! Kxh8 24.Qxf7 (threatening 25.Rh1+ Nh7 26.Qxg7#) Rg8 25.Bxf6 and wins. (b) 21...b4 22.Rh7! (i) 22...Nxh7 23.Bxh7+ Kf8 24.Qxg7+ Ke8 25.Qh8+ Bg8 26.Qxg8#; (ii) 22...fxg6 23.Qxg6 Ne8 24.Bxg7 1-0; (iii) 22...bxc3 23.Bxf7+ Kxf7 (23...Bxf7 24.Qxg7#; 23...Kxh7 24.Rh1+) 24.Qxg7+ Ke8 25.Rh8+ Bg8 26.Rxg8+ Nxg8 27.Qxg8#.

Feb-22-13		FSR: Gyula Sax Not this time - unless you count his king.

Feb-22-13		SamAtoms1980: Actually picked my way through this one. 21.Bxg6 fxg6 22.Qxg6 is early-week stuff, with the benefit of giving White the threat of 23.Rh7 among other things. After 22....Bf7, my next thought was, "23.Rh8+ is weird enough that it just might work." A closer look showed that it was not weird at all: after 23....Kxh8, the f7-bishop falls, and with Rh1+ and Qh5 coming up the hill, Black is out of luck.

Feb-22-13		Patriot: Material is even. This is difficult to calculate because there are so many permutations. The best I see is 21.Bxg6: 21...fxg6 22.Qxg6 (threatening 23.Rh7, winning) Bf7 23.Rh8+ Kxh8 24.Qxf7 threatening 25.Rh1+ I'm out of time.

Feb-22-13		Checker2: I saw only the first couple of moves. I also liked Rh6, seeing that if the bishop captured, black would get mated on h8. Curious, I ran 21 Rh6 Bxh6 through Fritz and mate can be avoided (in typical computer fashion) by giving up the queen on e5. Instead there are two adequate responses to Rh6 with near even evaluation first ... Ng4 22. Bxg7 Qxg5 and second ... b4! with a host of mating chances for black if white is not careful, best to depth of 15 is 22.Ne4 Qd5 23. Bxf6 In the game line if 22. b4 23 Rh7 mates in 9. Best given is (+6.5) 22. ...Bf5 23. Qxf5 vs (+10.6)22. ...Bf7, but a again a typical silicon piece-ceeding defense.

Feb-23-13		talsqueen: I got the first three moves, but not the rest.

Feb-23-13		kevin86: Sometimes a little sacrifice is needed to squirm into the enemy camp. BUT,the end is brutal!

Sep-08-23		Brenin: 21 Bxg6 fxg6 22 Qxg6 looks attractive and forceful. This position was thoroughly analysed ten years ago, so I shan't attempt to add my pennyworth.

Sep-08-23		mel gibson: I saw that line in under 20 seconds. Stockfish 16 says: 21. Bxg6 (21. Bxg6 (Bd3xg6 f7xg6 Qg5xg6 Rb7-d7 Rd1xd7 Be6-f7 Qg6-g5 b5-b4 a3xb4 Qc5xe5 f4xe5 Nf6xd7 e5-e6 Bf7xe6 Nc3-d5 Rc8-f8 Nd5xe7+ Kg8-f7 Ne7-d5 Kf7-g8 Rh1-e1 Nd7-e5 Re1xe5 Rf8-f1+ Kb1-a2 Rf1-f6 Re5xe6 Rf6xe6 Qg5-d8+ Kg8-h7 Nd5-f4 Re6-e5) +7.33/35 378) score for White +7.33 depth 35.

Sep-08-23		Tal Apprentice: The game analysis indicates 25...Nh7 when 25 Qh7 is the only possible move. There aren't any black knights on the board.

Sep-08-23		agb2002: Black threatens b4. White can weaken the black castle with 21.Bxg6: A) 21... fxg6 22.Qxg6 A.1) 22... Bf7 23.Rh8+ Kxh8 24.Qxf7 and mate soon. A.2) 22... b4 23.Rh7 A.2.a) 23... bxc3 24.Qxg7#. A.2.b) 23... Nxh7 24.Qxg7# A.2.c) 23... Ne8 24.Qxe6+ Kxh7 (24... Kf8 25.Bxg7+ Nxg7 26.Rh8#) 25.Rh1+ Bh6 26.Rxh6#. A.2.d) 23... Kf8 24.Qxg7+ Ke8 25.Rh8+ B(N)g8 26.Rxg8+ N(B)xg8 27.Qxg8#. A.3) 21... Bf5 22.Qxf5 A.3.a) 22... b4 23.Qg6 bxc3 24.Rh7 as in A.2. A.3.b) 22... Kf7 23.Rd5 Qc6 (23... e6 24.Rxc5 exf5 25.Rxc8 wins decisive material) 24.Bxf6 exf6 25.Nxb5 wins three pawns. B) 21... b4 22.Rh7 bxc3 23.Bxf7+ (23.Rxg7+ Kf8) 23... Kxf7 (23... Kxh7 24.Rh1+ and mate in three) 25.Qxg7+ as in A.2.d. C) 21... Kf8 22.Bd3 wins a pawn with an overwhelming position.

Sep-08-23		jffun1958: 22...Bf5 23. Qxf5 Qc6 24. Bxf6 exf6 25. Rd6 Qc4 26. d5 Rf7 is another defence line.

Sep-08-23		chrisowen: I go players quibble joke its way its hun v c its z Bxg6 ache match its ho acrid mid biff Bxg6 cite :)

Sep-08-23		chrisowen: heads-up puzzle taddice x

Sep-08-23		Chessius the Messius: Kind of complicated, I sensed too many lines. So I had to work for 30 minutes, reading all posts included. Noticed critical lines were missing. Therefore this following analysis, I don't know if it's completely correct, I used the home engine, but I thought it was fun. After all, it's a puzzle, it should end in mate. Consequently. --- 22... b4 23. Rh7 Ba2+ 24. Ka1 Ne8 25. Rxg7+ Kf8 26. Rf7+ Bxf7 27. Qh6+ Ng7 28. Bxg7+ Ke8 29.Qh8+ Bg8 30. Qxg8# Or: 28. Qh8+ Bg8 29. Qxg7+ Ke8 30. Qxg8# --- 22... Rd7 23. Rxd7 Bf7 24. Qg5 b4 25. axb4 Qxe5 26. fxe5 Nxd7 27. e6 Bxe6 After the following move, Black essentially only has a Rook move, but none of them work: 28. Nd5 Rf8 29. Rh8+ Kxh8 30. Qh5+ Bh6 31. Qxh6+ Kg8 32. Qxe6+ Rf7 33. Qxd7 Kg7 34. Nxe7 Rf6 35. Nd5+ Rf7 36. Qe6 Rf1+ 37. Ka2 Rf2 38. Qe5+ Kf7 39. Qc7+ Ke6 40. Qe7+ Kxd5 41. Qc5+ Ke6 42. Qxf2 a6 43. Qe2+ Kf6 44. Qxa6+ Kg5 45. b5 Kg4 46. b6 Kf4 47. b7 Ke4 48. Qe6+ Kf4 49. b8=Q+ Kg5 50. Qbe5+ Kh4 51. g3# Or: (22... Rd7 23. Rxd7 Bf7 24. Qg5 b4 25. axb4 Qxe5 26. fxe5 Nxd7 27. e6 Bxe6) 28. Nd5 Ra8 29. Nc7 Bc4 30. Nxa8 Nf6 31. Nc7 Kf8 32. Re1 Bf7 33. Ne6+ Bxe6 34. Rxe6 Kf7 35. Ra6 Bf8 36. b5 e6 37. Rxa7+ Be7 38. Rxe7+ Kxe7 39. Qg7+ Kd6 40. Qxf6 Kd7 41. c4 Kc7 42. Qxe6 Kd8 43. c5 Kc7 44. Qe8 Kb7 45. Qd7+ Kb8 46. b6 Ka8 47. Qc8# Or: (22... Rd7 23. Rxd7 Bf7 24. Qg5 b4 25. axb4 Qxe5 26. fxe5 Nxd7 27. e6 Bxe6) 28. Nd5 Re8 29. Nc7 Bf7 30. Nxe8 Bxe8 31. Qxe7 Nf6 32. Rf1 a6 33. Rxf6 Bxf6 34. Qxf6 Bb5 35. Qe7 Ba4 36. Qe6+ Kf8 37. Qxa6 Bd7 38. Qd6+ Ke8 39. b5 Bxb5 40. Qb8+ Kf7 41. Qxb5 Ke6 42. Qc4+ Ke5 43. b4 Kf6 44. b5 Kg6 45. b6 Kf6 46. b7 Kf5 47. b8=Q Kf6 48. Qd6+ Kg7 49. Qg4+ Kf7 50. Qgg6# Or: (22... Rd7 23. Rxd7 Bf7 24. Qg5 b4 25. axb4 Qxe5 26. fxe5 Nxd7 27. e6 Bxe6) 28. Nd5 Rd8 29. Qxe7 Bg4 30. Qxd8+ Kf7 31. Rh7 Kg6 32. Qg8 Kf5 33. Rxg7 Ne5 34. Rg5+ Ke4 35. Rxg4+ Nxg4 36. Qg5 a5 37. Nc3+ Kd4 38. Qc5#

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