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Joachim Vetter vs Ron A Oortwijn
EM/M/A019 (1997) (correspondence), ICCF Email, Oct-05
Lion Defense: Anti-Philidor. Lion's Cave (B07)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Dec-30-06  Swyp: I found the first 3 moves, but I don't see how g3 wins... yet
Dec-30-06  chessmoron: A good Knight sac and here's the continuation of the 2 Bishops doing the damage.

22...Nf8 23. Nf1+ Kg6 24. Be8 Be6 25. Bxf7+


click for larger view

25...Bxf7 26. Bxf8 Raxf8 27. Rd6+ Kh5 28. Rf5+ g5 29. Rf6 h6 30. Rxf7 Rxf7 31. Rxf7


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Dec-30-06  sleepkid: <22...Nf8 23. Nf1+ Kg6 24. Be8 Be6 25. Bxf7+ >

...really? I'm impressed that white was able to get a knight back on the board there. Nevermind that it could check from there.

Where on earth did they get the "Lions Cave" name for this opening? I've never heard that. This was always just the Anti-Phillidor.

Your last FEN is also missing <29. ...h6>

Dec-30-06  chessmoron: 23. Rf1+ not Nf1+.
Dec-30-06  notyetagm: <Swyp: I found the first 3 moves, but I don't see how g3 wins... yet>

Yes, I analyzed that position but did not see a win.

So I settled for attacking the Black a8-rook in the corner with 19 ♘xb5 cxb5 20 ♗d5 ♖b8 21 ♗xa7 ♖b7 22 ♗xb7 ♗xb7, winning ♖♙♙ for ♗♘. In addition, the Black b5-pawn is isolated and weak and if it falls then White will have three connected passed pawns on the queenside.

Dec-30-06
Premium Chessgames Member
  al wazir: I saw 19. Nxb5 cxb5 20. Bxb5+ Kf8 21. Bc6 Rb8 22. Bxa7 Rb4 23. Bc5+, winning ♖+♙+♙+♙ for a ♘. But if black plays 21...Bg7 he lose the ♗ instead of the ♖, and if he plays 20...Ke7 as in the game and 21...Bd6 he recaptures the ♗ and white gets only a minimal advantage (♖+♙+♙ for ♗+♘).

Checkmate (as in the game) is better.

Dec-30-06  notyetagm: <al wazir> You saw a better version of my line.
Dec-30-06  dzechiel: Like <Swyp> I found the knight sac and the two bishop checks. I was too impatient and wanted to check on f1 with the h-rook.
Dec-30-06  The17thPawn: <al wazir> I thank you for spotting 21.Bc6 after ...Kf8. I had the Ke7 line cold but couldn't find a decent continuation after Kf8.
Dec-30-06  WarmasterKron: I didn't get anywhere near this, as I was looking at Bxf7+ which seems to lead nowhere quickly.

On a side note, as the game starts 1.d4 d6 2.e4 Nf6 3.Nc3 Nbd7 4.f4 e5, shouldn't it come under B07?

Dec-30-06  capafan: <Swyp I found the first 3 moves, but I don't see how g3 wins... yet>

Correct me if I am mistaken, but g3 removes the possibility for black to close the KB file, eliminates any other haven for the N except the back rank and forces black to move at a time when almost any move hurts his position and hastens mate.

Dec-30-06
Premium Chessgames Member
  Marius: <The17thPawn: <al wazir> I thank you for spotting 21.Bc6 after ...Kf8. I had the Ke7 line cold but couldn't find a decent continuation after Kf8.>

20...Kf8 21.Bb4+
-..Kg8 22.Bc4! wins a piece(Rd8+ or Rhf1)
- ..Ne7 22.Rhf1 wins one of the knights

Dec-30-06  TrueBlue: after Kf6 black is lost, numerous ways to mate him. I think I may be batting 7/7 this week ;)
Dec-30-06  Wassily: Marius, obviously you mean 21. Bc5+
Dec-30-06
Premium Chessgames Member
  kevin86: 22 g3 is a very quiet move that creats a barrier so that black's king cannot advance past his fourth rank.

I remember that Morphy had a similar sac at b5 in his Opera Box Game-so I guessed it would fit here.

Dec-30-06  DeepThought: That's too high for me.
Dec-30-06  The17thPawn: <Marius> - I thank you as well sir!
Dec-30-06  LivBlockade: <Maruis> You can take that line one more move and things are much clearer: if 20...♔f8; 21. ♗c5+ ♘e7; 22. ♖hf1 ♗e6; 23. ♖d6! and White does win [if 23... ♖c8; then both 24. b4 or 24. ♗a3 look good - for example: 24. ♗a3 ♗xa2; 25. ♖d7 ♖d8; 26. b3]
Aug-20-19  smendel: 5... exd is better.

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