Konstantin Lerner vs Lembit Oll (1982)

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Kibitzing

Konstantin Lerner vs Lembit Oll
URS-ch sf Ivano-Frankovsk (1982), Ivano-Frankovsk URS
King's Indian Defense: Averbakh. Benoni Defense Advance Variation (E75) · 1-0

White to move.

ANALYSIS [x]

1-0

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1

FEN COPIED

explore this opening	find similar games	7 more K Lerner/Oll games
sac: 28.Nxh5+	PGN: download \| view \| print	Help: general \| java-troubleshooting

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< Earlier Kibitzing · PAGE 2 OF 2 · Later Kibitzing>
Mar-07-23		Dohboy: I thought that white could win a pawn with 28.Rxa5 (28..Rxa5 29.Qc3+), but I guess that I was thinking too small.

Mar-07-23		jrredfield: I quickly went with 28 Nxh5+ as my first choice, thinking to decimate Black's King defense and get the rook involved. There was another threat that White could invoke after this, e5, opening up the diagonal for the White Q. Just too many lines of attack for Black to defend. However, after additional analysis, I see that 28 Nf5+ might be superior as Brenin thought: 28 Nf5+ Kh7 29 Nxd6 Qc5 30 Nxe8 Rxe8 31 Rxa5. Either knight move wins. 28 Qc3+ might also work quite well.

Mar-07-23		Allderdice83: < Mayankk: My initial line was 28 Nxh5+ gxh5 29 Rg3+ but I struggled in some of the variations after 29 ... Kf6 30 e5+ Nxe5 31 Qe4, threatening Qf4# etc.> 29 ... Kf6 30. Qd2 with threats of Qf4# and Qg5#. Black can only delay by one move with 30 ... Nxd5 31. Qg5+ Ke6 32. Qf5#, or 30 ... Qxd5 31. Qf4+ Qf5 32. Qxf5#.

Mar-07-23		jrredfield: I later chose to see how many good moves White had at his disposal. According to Komodo Dragon 3.1, these all should win for White's 28th move: Nf5+, Nxh5+, Qc3+, Qc1, Nd4, Rea3 and maybe others. So Black is lost in so many ways.

Mar-07-23		King.Arthur.Brazil: I think of the line: 28. Nxh5+ gxh5 29. Rg3+ Kf8 30. Qd2 f6 31. Qh6+ Kf7 32. Qg7#

Mar-07-23		outplayer: <Brenin: My choice was 28 Nf5+ gxf5 (otherwise 29 Nxd6, forking Q and R) 29 Rg3+ Kf6 (or Kf8) 30 Qc1 Rg8 31 Nd4 followed by Qh6+. I think it's as good as the move 28 Nxh5+ played.> I thought of the 2 checks and choose Nf5+ but Nxh5+ is more forcing because is a capture.

Mar-07-23		agb2002: The rook on e3 is ready to attack the black king, the knight on c6 controls the escape square e7 and d6 is defenseless. These details suggest Nf5+ and Nxh5+. In the case of 28.Nxh5+ gxh5 (else drop a pawn) 29.Rg3+: A) 29... Kh6 30.Qd2+ Kh7 31.Qg5 and mate next. B) 29... Kh7 30.e5+ (after 28.Nf5+ gxf5, this wouldn't be check) B.1) 30... Kh6 31.Qd2+ as in A. B.2) 30... Kh8 31.Qd2 Nf8 (31... Kh7 32.Qg5; 31... Re6 32.dxe6) 32.Qh6+ Nh7 33.Qg7#. B.3) 30... f5 31.Qxf5+ and mate next. C) 29... Kh8 30.Qd2 as in A. D) 29... Kf8 30.Qd2 D.1) 30... Re8 31.Qh6+ Ke8 32.Rg8+ Nf8 33.Qxf8+ Kd7 34.Qe7#. D.2) 30... f5(6) 31.Qh6+ Kf7 32.Qg7#. D.3) 30... Re5 31.Qh6+ Ke8 32.Rg8+ Nd7 33.Qxf8+ Kd7 34.Qxf7+ Re7 35.Qxe7#. D.4) 30... Re6 31.dxe6 Qxc6 32.exd7 wins decisive material.

Mar-07-23		Brenin: <outplayer: ... I thought of the 2 checks and choose Nf5+ but Nxh5+ is more forcing because is a capture.> That line of reasoning doesn't really work: if Black declines the N after 29 Nxh5+ he is down by a P; if he declines the N after 29 Nf5+, followed by 30 Nxd6 Q moves 31 Nxe8 Rxe8, he is down by the exchange and a P. Purely from that point of view, Nf5+ is the more forcing move. Of course, there are other issues to consider, namely what happens if Black takes the N. I think the outcome is similar in both cases.

Mar-07-23		saturn2: Black is about to consolidate by Ne5 so white cannot hesitate. I found 28.Nxh5 Kh7 29.Ng3 which is prosaic and 29.Rf3 which is aggressive.

Mar-07-23		outplayer: <Brenin> I understand your line of reasoning. 28.Nf5+ was also my choice (I know why) and it is better.

Mar-07-23		cocker: Far from easy when there are two good moves. Engine favours 28 Nf5+.

Mar-07-23		scormus: My first thought was to offer the Ng3, but wasn't sure whether 28 Nf5+ or Nxh5+. The latter looked the more natural choice, and if ... gxh5 then 29 Rg3+. I didn't expect to see 1-0 immediately, but then realised that B was helpless. Curiously, none of B's forces would save him.

Mar-07-23		Dionysius1: I think there being 2 good moves makes it doubly easy. It wouldn't of course if it was a genuine puzzle. But it's "Position of the Day", for us to kibitz about. It does happen sometimes with POTDs that the right move isn't the one played - fine by me, and like I say, when there are 2 good moves even more interesting.

Mar-07-23		Dionysius1: I like how if Black tries to save his Q after 28. Nf5+ gxf5 29. Rg3+ Kf6 30. Qc1 Rg8 31. Nd4 click for larger view then White’s N and Q do a great job of controlling squares around Black’s K, e.g. 31…Qc5 32. Qh6+ Rg6 33. Rxg6+ fxg6 34. Ne6 click for larger view Black to move

Mar-07-23		chrisowen: I toy runs its liked gum quip its hub jew its a coff z Nxh5 achtung match Nf5 its ho its a cliff muff arrive its et baffle ze Nxh5 ear Nf5 bet :)

Mar-07-23		King.Arthur.Brazil: As said "easy", I didn't suspect of two solutions. However, I must agree with <Brenin>, that is more strong 28. Nf5+ gxf5 29. Rg3+ Kf6 30. Qd2 Rg8 31. Raa3 h4 32. Qh6+ Rg6 33. Qxh4+ Kg7 34. Nd4 Qxb2 35. Nxf5+ Kf8 36. Qe7+ Kg8 37. Rxg6+ fxg6 38. Rg3 Nf8 39. Nh6+ Kh8 40. Nf7+ Kg8 41. e5 Nc8 42. Nh6+ Kh8 43. Qf6+ Kh7 44. Nf7 Kg8 45. Rf3. Well, seems mate comes next, but Qb1+ 46. Kh2 Qf5 47. Rxf5 (the King conquered the enemy's ♕ very good!) gxf5 48. e6. Now, Black loses... lgs. A lot of moves... I'm getting old!

Mar-07-23		mel gibson: I could see that a Knight move to either f5 or h5 would win. Stockfish 15 says: 28. Nf5+ (28. Nf5+ (Ng3-f5+ Kg7-h7 Nf5xd6 Qb5-c5 Nd6xe8 Ra8xe8 Ra1xa5 Qc5-d6 Qc2-c3 f7-f6 Ra5-a7 Kh7-g8 Qc3-d4 Nb6-c8 Ra7-b7 Nd7-c5 Rb7-b4 Nc5-d7 Rb4xc4 Kg8-h7 Rc4-c1 Qd6-f4 Rc1-e1 h5-h4 Qd4-b4 Nc8-b6 Nc6-d4 g6-g5 Nd4-f5 Qf4-e5 Re1-d1 Re8-b8 Re3-a3 Rb8-e8 Ra3-c3 Re8-b8 Qb4-e7+ Qe5xe7) +9.46/37 196) score for White +9.46 depth 37.

Mar-07-23		QueenMe: The only challenge here is, due to Black's early resignation, convincing yourself that there is a winning continuation regardless of Black's response.

Mar-07-23		Dionysius1: And luckily there are plenty :-) That learned him. The writing was on the Woll. Etc

Mar-07-23		chrisowen: Graddmaster no?

Mar-07-23		AIC: Maybe I didn't read all the kibitzes very carefully, so perhaps I missed something... What if black doesn't capture that knight, keeps his pawns together and looks a better defense for his king with let's say 28...Kf8? Doesn't have better chances to fight on?

Mar-07-23		Diademas: @<AIC> That possibility is just slightly better. White threatens to invade with the Queen on h6, so Black is pretty much forced to trade his Queen for the Knight on c6. Stockfish gives:< +10.26 (25 ply) 29.Qd2 Rec8 30.Rb3 Qxc6 31.dxc6 cxb3 32.Qxd6+ Kg8 33.cxd7 Nxd7 34.Qxd7 gxh5 >

Mar-07-23		moronovich: Hi <Diademas> ! Good to se you again. Are you still living the life in Argentina ?

Mar-07-23		AIC: @Diademas - thanks.

Mar-07-23		20MovesAhead: Is it possible to consider 28.Nd4 and 29.Ngf5 check ?

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