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Ramon Rey Ardid vs Jose Sanz Aguado
ESP-ch m (1943), Madrid, rd 4
French Defense: Winawer. Delayed Exchange Variation (C01)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Feb-11-20  Cheapo by the Dozen: After 21 Nxf5, the knight is poisoned, because 21 ... gxf5 opens up a skewering check at h5 that drives Black's king away from the rook. This turns out to be the game line.

The only serious Zwischenzug idea is 21 ... Rxe5, but after 22 fxe5, the knight remains poisoned, since either way of capturing loses Black's queen.

Feb-11-20  Cheapo by the Dozen: By the way -- if Black wisely declines the knight, White is up a pawn and has an attack. The engine thinks the attack is very strong, so that counts as a puzzle solution for me.
Feb-11-20  saturn2: 21.Nxf5gxf522.Qh5+Kg723.Rxe8
wins exchange and pawn, so better black does not take the knight.
Feb-11-20  lost in space: Found 21. Nxf5. Nothing to add what <CbtD> and <s2> stated already
Feb-11-20  BxChess: What does White have if the knight is taken with the queen after 21...Rxe5 22. dxe5 Qxe5?
Feb-11-20
Premium Chessgames Member
  boringplayer: BxChess White retakes with the f-pawn. Now ..Qf5 runs into Rf1.
Feb-11-20  BxChess: <boringplayer:> Thanks. I see it now.
Feb-11-20  Walter Glattke: 21.Nxf5 Rxe5 22.dxe5 Qxf5 23.e6+ Ke7 black wins. 22.Qxe5 Qxf5 black wins.
Feb-11-20  stacase: Played it move for move (not very many as it turned out) like I would have over the board, and much to my surprise, Black tipped his King over.

It looks like Black didn't have enough coverage for e8 and his King was one of those assigned to the task. The Knight sacrifice allowed White to remove the King from the scene and win the ensuing exchange which would leave White up a Knight for a Rook. Black would have none of that and tipped his King instead.

Feb-11-20  Walter Glattke: But 22.fxe5 Qxf5 23.Rf1 or 22.-gxf5 23.e6+
Feb-11-20  Ratt Boy: <Walter Glattke: But 22.fxe5 ♕xf5 23.♖f1 or 22.-gxf5 23.e6+>

Exactry. Those who didn't see these continuations after Black's 21♖xe5 did not solve the puzzle.

Feb-11-20
Premium Chessgames Member
  agb2002: White has a bishop for a knight.

The pawn on g6 prevents Qh5+. Therefore, 21.Nxf5:

A) 21... gxf5 22.Qh5+ Kg7 (22... Kf6 23.Rxe8 + - [R+B+P vs 2n]) 23.Rxe8 Nf6 (23... Rxe8 24.Qxe8 + - [R+B+P vs 2n]) 24.Qg5+ Kf7 (24... Kh8 25.Rxf8+ Ng8 26.Q(R)xg8#) 25.Rxf8+ Kxf8 26.Qxf6+ wins.

B) 21... Qxf5 22.Rxf5+ wins decisive material.

C) 21...Rxe5 22.fxe5

C.1) 22... gxf6 23.e6+ wins.

C.2) 22... Qxf5 23.Rf1 wins decisive material.

C.3) 22... Qe6 23.Nd6+ Kg7 24.Nxb7 wins two pawns.

C.4) 22... Re8 23.Nd6+ Kg7 24.Nxe8 wins an exchange and a pawn.

C.5) 22... Qd8 23.e6+ Ke8 (23... Kf6 24.Qe5#) 24.e7 wins decisive material.

C.6) 22... Qc7 23.Nd6+ followed by Bc1 with an extra pawn and a much better position.

Feb-11-20
Premium Chessgames Member
  chrisowen: Mootycows keinlugus minkkeyus nf5slugus fafflugus keyilugus pf5lugus flufffags dunks it a 21Rxe5 kestrelus keyamugus coitbenty keyilugus eggerlump 2 3 it ok koinlugus keinlugus qh5slugus hufflugus kg7slugus glugmugus dunks it eve 23.Rxe8 kestrelus ibitdowwny keyilugus entertain keyimugus 4 5 it ok koinlugus keinlugus lugumkeys mockwitty keinlugus jumpzitva its wetskeyus keyomugus kestrelus pestlugus hiverscud binaryums its weeplugus keyomugus kestrelus creviceus dubmitnow keyslugus keyomugus;

lugumkeys
nf5slugus fafflugus keyilugus;

gufflugus faustlugs coitbenty 20Qd8 kestrelus keyilugus dittomugs 0 1 it ok koinlugus keinlugus keytinlug coitbenty 20Ng8 kestrelus bithoopna keyamugus ghostarms 2 3 it ok koinlugus keinlugus umsumsums faceditch keychoose cufflugus dinklugus eithermug keepkeyro diminishy lugumkeys mockwitty keyslugus nf5slugus fafflugus;

Feb-11-20  TheaN: Interesting combo, as the zwischenzug Rxe5 has to be solved. <21.Nxf5!>, after 21....gxf5? 22.Qh5+ slices through the Black camp winning the exchange on e8. After the zwischenzug 21....Rxe5 White has to be careful to play 22.fxe5! (dxe5 is the prosaic answer in these cases) as now 22....gxf5? 23.e6+ +- or 22....Qxf5? 23.Rf1 +- (which would not available if the f-pawn is in the way). So, Black is 'best' after <21....Rxe5 22.fxe5 Qe6 +-> to block the e-pawn, but now White got entry, a pawn and space, so should eventually win.
Feb-11-20  Nullifidian: So basically this "Tuesday" puzzle is that white wins a pawn with ♘xf5. Everyone else seems to be talking about ♖xe5 as a response, but I'd play ♖d8. After that you'd get:

22. ♘h6+ ♔g7 23. ♘xg8+ (there's nothing better) ♔xg8 24. ♖e7 ♕f5 25. ♖xb7 ♖d7 26. ♖xd7 ♘xd7 27. ♕e6 ♕xe6 28. ♖xe6 ♖f6 and now the only continuation if you want to save that undefended pawn on f4 is to trade rooks, so you might as well trade them now: 29. ♖xf6 ♘xf6. White would be up two pawns with pawn majorities on both sides, but it's hardly an unambiguously won position. White would still have to find a way to break through with just one bishop in a fairly blocked-up position. A computer might be able to play it out to a win every time, but a human playing in the heat of the moment could allow some drawing chances.

Feb-11-20  seneca16: I have no idea what black was trying to accomplish. Some of his moves seem self-destructive.

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