Thomas Henrichs vs Matthew Tan (2005)

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Thomas Henrichs vs Matthew Tan
Vlissingen HZ op (2005), rd 8, Aug-13
Semi-Slav Defense: Stoltz Variation (D45) · 1-0

ANALYSIS [x]

FEN COPIED

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Sep-04-23		Lambda: I had a different idea, 29.Bf6+ Rxf6 30.Qg7+ Ke8 31.Qxf6 winning the exchange. Computer confirms that both win, and so do a load of more quiet moves, black's position is just too bad.

Sep-04-23		Brenin: 29 Nxf5+ Rxf5 30 Qxe4+ wins the exchange and a P, 29 Bf6+ Rxf6 30 Qg7+ wins the exchange.

Sep-04-23		Mayankk: Back after a brief break. My first instinct was to make 29 Qg7+ work but it doesn't. The King can safely hide at e8. I then noticed the 29 Bf6+ idea, winning an exchange if 29 ... Ke8 30 Bxd8. White can then take its time to move its King to h1 and get the Rooks to attack on the open g file. 29 ... Kxf6 30 Qg5# is of course suicide while 29 ... Rxf6 30 Qg7+ Ke8 31 Qxf6 seems worse as it allows White Queen to intrude along with losing the exchange.

Sep-04-23		mel gibson: I was looking for a quick checkmate but couldn't find one. The Black King escaped with every possible move. Stockfish 16 says: 29. Nxf5+ (29. Nxf5+ (Nh6xf5+ Rf8xf5 Qg2xe4+ Ke7-f8 Qe4xf5+ Qc7-f7 Qf5xf7+ Kf8xf7 Rf1-c1 c6xd5 Rb1-a1 Rd8-d7 Ra1-a5 Bd6xb4 Ra5xb5 Bb4-a3 Rc1-a1 Ba3-e7 Ra1-a7 Bb7-c8 Ra7xd7 Bc8xd7 Rb5xd5 ) +6.21/47 565) score for White +6.21 depth 47.

Sep-04-23		saturn2: 29.Bg7 wins an exchange. The Rf8 can only move to e8 and then 30.Qg5+ mates soon.

Sep-04-23		saturn2: 6.Qc2 is quiet and should not be answered by the quiet Be7 but by Bd6 to prepare e5 later on.

Sep-04-23		Check It Out: Interesting study, but not one star simple.

Sep-04-23		Allderdice83: 29. Nxf5+, and there's the text line, but other lines lead to a win of even more material for White, eg. 29 ... Kf7 30. Nxd6+ Qxd6 31. Bc5 29...Ke8 30. Nxd6+ Rxd6 31. Be5 Rg6 32. Qxg6+ hxg6 33. Bxc7 29...Kd7 30. Qg7+ Kc8 31. Nxd6+ Qxd6 32. Qg4+ and either 29 ... Rd7 33. Bc5 (and Black can't pin White's queen), or 29 ... Kb8 33. Be5 Rg8 34. Bxd6+ Ka8 35. Ra1+ Ba6 36. Qxg8 Rxg8+ 37. Kf2 Kb7 38. dxc6+ Ka7 39. Bc5+

Sep-04-23		agb2002: White has a bishop and a knight for the bishop pair. The knight is trapped. This suggests 29.Nxf5+: A) 29... Rxf5 30.Qxe4+ wins decisive material. B) 29... Kd7 30.Qh3 (30.Nxd6 Rg8) seems to win material (30... Kc8 31.Nxd6+; 30... Ke8 31.Ng7+ and 32.Ne6). C) 29... Ke8 30.Qxe4+ is crushing. ----- Another option is 29.Bf6+: A) 29... Kxf6 30.Qg5#. B) 29... Rxf6 30.Qg7+ Ke8 31.Qxf6 wins an exchange. C) 29... Kd7 30.Bxd8 looks winning but the knight is still stranded. D) 29... Ke8 30.Bxd8 wins an exchange. ----- I'd play 29.Nxf5+.

Sep-04-23		jffun1958: IMHO a tuesday or wednesday level puzzle.

Sep-04-23		HeMateMe: Not so 'easy'. you're expecting the first move to be a Queen move.

Sep-04-23		TheaN: <HeMateMe: Not so 'easy'. you're expecting the first move to be a Queen move.> Which surprisingly works as well. In fact, I let SF ran on the puzzle move, after my choice Bf6+ and the game line which I missed. Apparently best is 29.Qh3 (+7.2) which just puts additional pressure on f5 and Black can't even stop it. Line itself involves putting the king aside the next move, so the direct options are a bit easier: 29.Bf6+ Rxf6 30.Qg7+ (+6.1) and 29.Nxf5+ Rxf5 30.Qxe4+ (+6) evaluate similar. As some have said already, Black's toast either way.

Sep-04-23		mel gibson: <Apparently best is 29.Qh3 (+7.2)> Yes - I forced SF to play that line and it's better! Stockfish 16 says: 29. Qh3 (29. Qh3 Qc8 (Qc7-c8 Kg1-h1 Bd6xb4 Rf1-g1 Ke7-d6 Rb1xb4 Kd6-c7 d5xc6 Bb7xc6 Qh3-g2 Qc8-e6 Qg2-g7+ Qe6-d7 Bd4-c5 Qd7xg7 Rg1xg7+ Rd8-d7 Bc5xf8 Rd7xg7 Bf8xg7 Bc6-e8 Bg7-e5+ Kc7-c6 Nh6-g8 Be8-h5 Rb4-b1 Kc6-c5 Kh1-g1 Kc5-c4 Be5-d4 Bh5-f7 Ng8-e7 Bf7-e8 Ne7xf5 Be8-d7 Nf5-h6 b5-b4 f4-f5 Kc4-b5 f5-f6 Bd7-e6 f6-f7 Be6xf7 Nh6xf7 b4-b3 Rb1xb3+ Kb5-c4 Kg1-f2 Kc4-d5 Rb3-b5+ Kd5-c6 Nf7-e5+ Kc6-c7) -6.59/43 655) score for Black -6.59 depth 43.

Sep-04-23		chrisowen: I'd make c lan its baroque pow its shot Nxf5+ afford puff Qh3 gack coffin its able its leeway dub choose v bubblegum veg Qh3 bah its Nxf5+ gee :)

Sep-04-23		dorsnikov: I went with B-f6 chk. According to computer analysis this also wins.

Sep-04-23		Brenin: The Stockfish line 29 Qh3 Qc8 30 Kh1 Bxb4 31 Rg1 Kd6 32 Rxb4 Kc7 etc given by <mel gibson> illustrates how different machines and humans are: I cannot imagine two human beings, faced with this position, coming up with that sequence of moves.

Sep-04-23		King.Arthur.Brazil: Today, I don't know why, I don't feel potd as "easy"... and I went on a more "complicated" line with Bg7, which also win the quality, has some check mates together. But tooooo long analysis. The simple moves like Nxf5+ or Bf6+ are preferable.

Sep-04-23		King.Arthur.Brazil: 29. Bg7 Rf6 30. Bxf6+ Kxf6 31. Qg5# and Rfe8 30. Qg5+ Kd7 31. Qxf5+ (Re6 32. Qxe6#) Ke7 32. Qe6#. 29... Rh8?? 30. Bxh8 Rxh8 31. Qg7+ Kd8 32. Qxh8+ with an extra ♖ and attack. For 29... Rg8 30. Nxg8+ Rxg8 31. Bf6+ Kxf6 32. Qxg8. Also, 29... Ke8 30. Bxf8 (Kxf8 31. Qg8+ Ke7 32. Qf7#) Bxf8 31. dxc6 Bxc6 32. Nxf5 (e.g. Rd7 33. Kh1 Bd5 34. Rfc1, etc.) In the case of: 31. dxc6 Bxh6 32. cxb7 Qxb7 33. Rfd1 and B ♔ is nude (e.g. Rxd1+ 34. Rxd1 Bf8 35. Qg8 h6 36. Qe6+ Qe7 37. Qc8+ Kf7 38. Rd7...). Maybe: cxd5 33. Rfc1 Qg7+ 34. Qxg7+ Kxg7 35. Kf2 Kf6 36. Rg1 Bc6 37. Rg8 Bd7 38. Rh8... or ♙h or one ♗ with Rd8... similar situations must occur anyway. B has the reply: 29... Rf7 30. Qg5+ Ke8 31. Nxf7 Qxf7 32. Bf6 Rd7 33. dxc6 Bxc6 34. Rfc1 Rc7 35. Kf2. Maybe, <Brenin> will find some fail, that I didn't noticed.

Sep-04-23		Breunor: Bf6 for me also.

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