John van der Wiel vs Fred van der Vliet (1983)

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John van der Wiel vs Fred van der Vliet
Dutch Championship (1983), Hilversum NED, rd 11, Apr-29
Sicilian Defense: Najdorf. Polugayevsky Variation (B96) · 1-0

ANALYSIS [x]

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Feb-24-13		newzild: Missed it. I went for 21. Bxg6 Rxh3 22. Bxf7+ with a king hunt.

Feb-24-13		diagonalley: yeah... ditto... me too!

Feb-24-13		M.Hassan: "Insane" White to play 21.? Equal 21.Rxf7 Rxh5 22.Rxe7+ Rxe7 23.Nf6+ Kf7 24.Nxh5 gxh5 What next?

Feb-24-13		vinidivici: Not so hard... i was thinking about 21.Rxf7 (the key is d5 knight is taboo due to Qxc8) Bxg5 22.Rxa7 Rxh5...now the material even If 23.Nxc7 Kf7 (23...Qxc7 a4.Rxc7) 24.Nxe6+ Maybe this line is not the best but im very sure 21.Rxf7 is the move!

Feb-24-13		morfishine: I too thought <21.Bxg6 Rxh3 22.Bxf7+> was the critical position, when White must analyze the three Black replies: 22...Kf8, 22...Kd8 & 22...Kd7 I dismissed 21.Rxf7 due to 21...Rxh5 22.Rxe7+ Rxe7 23.Nf6+ Kf8 24.Nxh5 gxh5 and White is a piece down Oh well, very nice finish by Van der #1

Feb-24-13		mistreaver: Sunday. White to play. 21.? Insane. Just as i thought, at first sight this looks impossible. So many candidates, so many possibilities,everything is hanging in white position, altough one feels white should come on top. A) The first thing i wanted to do was: 21 Bxg6 (striving for a queen sacrifice on sunday seems like a reasonable idea) 21 ... Rxh3 (i think there is no particular choice) 22 Bxf7+ Now black has 2 king moves: A1) 22 ... Kf8 23 Bh5+ (in order to prevent Ke8, as would occur after Bxe6+) and now... A12) 23...Kg7 24 Rf7+ Kh6 (Kh8 25 Rh7+ Kg8 26 Bf7+ Kf8 also doesn't bring white near the solution) And i can't see any promising continuation for white, therefore i will cut my analysis of the queen sacrifice here, i think also in case of Kd8, black doesn't have promising continuation that can prevent black king from reaching c7 or c6) B)Another move i was considering on first glance at the board was the 'obvious' 21 Nxf7 Rxh5 (black can't take on d5 since Qxc8 would be the answer, and i think that any other rook move would be simply worse, say 21... Rh7 22 Qg4 and black's position is dangerous) 22 Qg3 (in order to prevent Re5, and also eyeing the knight on b8) 22... Nd7 (developing seems most sensible 23 Qxg6 and now Ne5 followed by Nc6 is threatened. I don't know, i would certainly play Nxf7 OTB, don't see any other ideas, except perhaps sacrificing knight on d5 in order to prevent king to step on d-file but since that knight is indirectly defended, i would say it is not necessary to move it. Time to check. ------------------- Ahhhh, 21 Rf7, i was afraid to make that move, but white wins in every continuation. <M.Hassan: "Insane" White to play 21.? Equal 21.Rxf7 Rxh5 22.Rxe7+ Rxe7 23.Nf6+ Kf7 24.Nxh5 gxh5 What next?> After Qxh5 black has no defence against the threat of Qh8. The game continuation is also pretty and effective. I dismissed Rxf7 mainly because of Bxg5 but the following computer line is amazingly pretty: 21 Rxf7 Bxg5 22 Rxe7!! (Rxa7 Rxh5 Qd3 is also sufficient, but this is much more clinical and pretty) 22... Rxe7 (22...Bxe7 23 Nxe7+ Kxe7 24 Qxh8 and Fritz announces mate in 6.) 23 Bxg6 Kd7 24 Nxe7+ and white wins. For me this was trully a sunday puzzle that shows how much more one has to learn and work on chess to come one step closer to true chess mastery.

Feb-24-13		paulalbert: Like others, I tried to make the Bxg6, Bxf7ch idea work, but fortunately gave up after not spending too much time on that dead end and looked to see what actually happened.

Feb-24-13		vinidivici: Yesterday is harder, but maybe it was my condition. And this is the second week consecutively i find that Saturday puzzles are harder than Sunday. But previous Saturday failure doesnt happen this week.

Feb-24-13		chrisowen: Don't look a gift rook horse in geedup f7 low in, manage the queens offside achieve rook so a 21.Rxf7 us low entice choose the path in gel took on a 21...gxh5 to prevent check cyclepride light in really finding rook as key first move in a 21...Bxg5 this upsets the apple cart bag in 7e will invade rook mask his queen intentions looks very complicated to me, ra7 you source also black cant defend alive g6 etc able to breakthrough with queenh3 in finger gcolomn, bind queen g3 or g4 in duty, it is king grapple d8 or chest queen hotels in motel re in heading g6xh5 age I ha eg 22.nxe7 and rook I das booting another one bite dust I negligent as too cherubim e7 put to better use in exactly also ok go 22...Rxe7 in jog your memory at gum 23.Rxe7+ yippee i centre as ion 23...Kxe7 a ready tres bon bif this is real movement of the people as chux 24.qh4 or deem 24.Ne4 both have rich possibility, free hint 24.qh4 oomph in delicate Nd7 has to, develop in getting out of a bind at enact 25.Ne4+ am included get him bless it fetch queen over am check 25...kf8 in tba cc yes we deem a law unto himself l0 winded 26.Rxd7, in suffer 26.Qf4+ till ever age street i pull at tender 26...ke8 when knight trot queeng5 in alivery 27.Nd6+ enter the fray it is xray pinning for fancy queen anvil and knight double f7 feels right kingd8 enact in juicy a plum spot dine on g5 re backing 27...ke7 guarded, itpalm in at our conction knight gone fly down fit grips ever driven d6+#.

Feb-24-13		amuralid: If anyone is wondering why black resigned: 1. ... Ke7. 2. Qf7+ Kd8 3. Nb7+ winning the queen. If 3. ... Bxb7? 4. Qd7 ++

Feb-24-13		dwgriff: 21. Nxe6 with the idea Bxe6 22. Qxe6 fxe6 23. Nc7+ Rxc7 24.Bxg6

Feb-24-13		snakebyt: I chose 21. Ngxf7 RhxB 22 Qxe6 Rhxe5 23 Rxe5 ... the f7 attack was all I could focus on but didn't consider using my Rook to grab him.

Feb-24-13		Patriot: Material is even. "Insane" just about covers it. g5 and h5 hang while d5 cannot be captured without cost (it leaves c8 to capture). So many pieces are aimed at the king's pawns there must be a way to capitalize on this. 21.Rxf7 Rxh5 22.Rxe7+ Rxe7 23.Nf6+ and 24.Nxh5 looks winning. 21.Rxf7 Bxg5 22.Rxa7 Rxh5 23.Qf3 looks devastating. 21.Rxf7 Bxg5 22.Rxa7 gxh5 23.Qf3 Rf8 24.Qxh5+ Kd8 25.Qxg5+ 21.Rxf7 gxh5 22.Rxe7+ Rxe7 23.b4 Qxa2 24.Nf6+ Kf8 25.Rd8+ Kg7 26.Rxh8 Kxh8 27.Qxh5+ Kg7 28.Ne8+ I'm not sure about any of that--it looks crazy. Another try is 21.Bxg6: 21...Rxh3 22.Rxf7 Bxg5 23.Rxa7+ Kf8 24.Rf7+ and I'm just not seeing it. Already I spent way too much time on this. I'll go with Rxf7.

Feb-24-13		Patriot: Very tough! I missed some key lines in there.

Feb-24-13		Jimfromprovidence: I thought I had found three solid defenses to 21 Rxf7, but they all lose. These are 21...Rxh5, 21...exd5 and 21...Nc6, below. click for larger view White wins spectacularly with 22 Bxg6! click for larger view The queen is untouchable as 22...Rxh3 loses to 23 Nc7+ Rxc7 24 Rf1#. click for larger view

Feb-24-13		rilkefan: I didn't consider 24.Qh4.

Feb-24-13		agb2002: White has a bishop and a knight for the bishop pair. Black threatens 21... Rxh5, 21... Bxg5 and 21... b4 (21... exd5 22.Qxc8+). The black king in the center suggests 21.Nxe6, to open lines, save one of the threats and create others of White's own: A) 21... Bxe6 22.Qxe6 A.1) 22... fxe6 23.Nc7+ Q(R)xc7 24.Bxg6#. A.2) 22... g(R)xh5 23.Nc7+ Q(R)xc7 24.Qxf7#. A.3) 22... O-O 23.Nxe7+ A.3.a) 23... Rxe7 24.Qxe7 gxh5 25.Qg5+ Kh7(8) 26.Qxh5+ Kg7(8) 27.Qg5+ Kh7(8) 28.Rd3 and mate in two. A.3.b) 23... Kg7 24.Rxf7+ and mate soon. For example, 24... Rxf7 25.Qxg6+ Kh8 26.Qg8#. A.3.c) 23... Kh7(8) 24.Rxf7 is similar to A.3.b. A.4) 22... Nd7 23.Qxe7#. A.5) 22... Rd7 23.Nf6+ Kd8 (23... Kf8 24.Nxd7+, etc.) 24.Rxd7+ Kc8 (24... Nxd7 25.Qxd7#) 25.Qxe7 Nxd7 26.Qxd7+ Kb8 27.Bf3 Qb6 28.Nd5 + - [B+N+P]. B) 21... fxe6 22.Nxc7+ Q(R)xc7 23.Bxg6#. C) 21... Rxh5 22.Ng7+ C.1) 22... Kd8 23.Nxe7+ Kxe7 24.Qxc8 Re5+ 25.Kf2 Qb6+ 26.Kg3 and after a few checks the black king will succumb to White's heavy pieces. C.2) 22... Kf8 23.Qxc8+ Kxg7 24.Qxb8 Rd7 and the black king looks safer than before. --- Another possibility is 21.Rxf7, with idea 22.Rxe7+ Rxe7 23.Nf6+: A) 21... Rxh5 22.Rxe7+ Rxe7 23.Nf6+ Kf8 24.Nxh5 A.1) 24... gxh5 25.Qxh5 Kg7 26.Qh7+ Kf6 27.Ne4+ Ke5 28.Qh5+ Kxe4 29.Rd4+ Ke3 30.Qf3#. A.2) 24... b4 25.Qf3+ Kg8 26.Qf6 gxh5 27.Qxe7 and once the king escapes from the black queen the threats Qf7+ and Rd8 should win. B) 21... gxh5 22.Rg7 (threatens 22.Nxe7 Rxe7 23.Qxh5+) B.1) 22... exd5 23.Qxc8+ Qd8 (23... Bd8 24.Qe6+ Re7 (24... Be7 25.Rxd5 looks winning) 25.Rxe7+ Bxe7 26.Rxd5 should win) 24.Qe6 followed by either Qf7+ or Rxd5 with a winning attack. B.2) 22... Bxg5 23.Rxa7 Nc6 24.Nc7+ looks winning. For example, 24... Ke7 25.Qg3 Nxa7 26.Qxg5+ Kf7 27.Qf4+ (to defend the knight) 27... Ke7 28.Rd3 Rf8 29.Qd6+ Kf7 30.Rf3+, etc. C) 21... Bxg5 22.Rxa7 looks similar to previous lines. D) 21... Rg8 22.Bxg6 looks disasterous for Black. Apparently, 21.Rxf7 is stronger than 21.Nxe6.

Feb-24-13		James D Flynn: Material is equal but Black’s Q-side is not developed, however Black appears to be about to win the B on h5 which is pinned. The White N on g5 is also attacked by the B on e7 and has no defenders. White can break the pin and attack a Black piece by 21.Qg3 which threatens 22.Qxb8 when the Q would attack the R on a7 and the B on c8, Black could not defender both because the N on d5 controls the c7 square. Both Ks are in the centre , but Black’s pieces are not well placed to exploit the White K position whereas White Rs on the d and f files would make any flight by the Black K hazardous if White succeeds in attacking the e8 square. My first thought was Bxg6 to open the f file and check the K. However, after 21.Bxg6 Rxh3 22.Bxf7+.Next idea to open the f file by 21.Nxe6 then fxe6 loses immediately to 22.Nc7+ Q or R xc7 23.Bxg6# (If 21….Bxe6 22.Qxe6 fxe6 23.Nc7+ Qxc7 24.Bxg6#). If the N is not taken e.g Rxh5 24.Ng7+( opens the diagonal for Qxc8+) Kd8 25.Nxe7+ Kxe7 26.Qxc8(threat Qe8#) Re5+ 27.Kf2 Qb6+ 28.Kg3 Rg5+ 29.Kh3 f5(not Qc6 30.Qd8#) 30.Qe8+ Kf6 31.Qf8+ Rf7 32.Ne8+ Ke5 33.Rde1+ Kd5 34.Qxf7+ Kc5 35.Re5+ Kc6 36.Qd5#

Feb-24-13		patzer2: Not only do we have an extremely difficult puzzle solution this Sunday with the demolition 21. Rxf7!!, but we also have an amazing game to set up the winning position. Most club players would think only a rank novice would play 18. Bxh5! and "lose" the "pinned" Bishop to the obvious 18...g6. Yet GM John Van der Wiel correctly sees 18. Bxh5! not as the "loss" of a piece, but as the beginning of a winning attack by offering up the Knight as a poisoned piece with 18...g6 19. Nd5! . After the reply 19...Qa5+ 20. c3 Be6, the stage is set for the brilliant 21. Rxf7!!

Feb-25-13		agb2002: I spent around two hours with this puzzle, the first one trying to make 21.Nxe6 work. It was so enjoyable that I would call this game "Double fun".

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