Author: Mike S.
Date: 11:59:14 12/28/01
Go up one level in this thread
On December 28, 2001 at 09:50:08, David Rasmussen wrote:
>On December 27, 2001 at 22:48:09, Mike S. wrote:
>
>>Maybe you like the positions I used so far, in the positional part of my old
>>testsuite. It is a selection from various other tests, from which I took 2
>>positions each which I liked best. The difficulty varies.
>
>These are too difficult. They have to be so easy that someone not very strong
>(i.e. me), can more or less immediately see why this move would be the best or
>one of the best. "Oh, I see. By putting the bishop there, I am forcing the
>exchange of my bad bishop for his good, and at the same time removing a >defender of his outpost square".
Some of the positions are of that type, i.e. #33 is a sacrifice of the exchange,
to undouble an isolated doubled pawn and get a protected passed pawn (if white
accepts the sac; some programs don't!).
To provide some explanation, here is the PGN. I tried to quickly translate the
most important comments where available (rest is still in german):
[Event "Budapest-Moscow"]
[Site "?"]
[Date "1949.??.??"]
[Round "3"]
[White "Barcza, G."]
[Black "Kotov, A."]
[Result "0-1"]
[ECO "D02"]
[Annotator "MR-Test"]
[PlyCount "82"]
[EventDate "1949.??.??"]
1. Nf3 d5 2. g3 Nf6 3. Bg2 c5 4. O-O e6 5. d4 cxd4 6. Nxd4 Bc5 7. c4 O-O 8. Nb3
Bb6 9. cxd5 Nxd5 10. Na3 Nc6 11. Nc4 Bc7 12. Ne3 Nce7 13. Nxd5 Nxd5 14. e4 Nb4
15. Bd2 Qe7 16. Qc1 Bb6 17. Qc3 a5 18. a3 Nc6 19. e5 {} 19... a4 $1 {
Practically forces Bxc6 - White has to exchange his fianchetto bishop.} 20.
Bxc6 (20. Nc1 Ba5 21. Qe3 Bxd2 22. Qxd2 Nxe5) 20... bxc6 21. Nd4 c5 22. Nc2 Qd7
23. Rfd1 Bb7 24. f3 Qc6 25. Ne1 f6 26. Bf4 Ba5 27. Qe3 fxe5 28. Bxe5 Bxe1 29.
Rd6 Rxf3 30. Qxe1 Qe8 31. Bxg7 Kxg7 32. Rxe6 Qh5 33. Re7+ Rf7 34. Qc3+ Kg8 35.
Re5 Qg4 36. Qxc5 h6 37. Rae1 Raf8 38. Re6 Qf3 39. Rg6+ Kh7 40. Rxh6+ Kxh6 41.
Re6+ Kh7 0-1
[Event "Vilnius cf"]
[Site "?"]
[Date "1984.??.??"]
[Round "?"]
[White "Kasparov, G."]
[Black "Smyslov, V."]
[Result "1-0"]
[ECO "D52"]
[Annotator "Strategietest-5"]
[PlyCount "82"]
[EventDate "1984.??.??"]
1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5 8.
Qd2 Bb4 9. Rc1 O-O 10. Bd3 e5 11. O-O exd4 12. exd4 f6 13. Bh4 Rd8 14. a3 Bxc3
15. bxc3 Nf8 16. Bg3 Be6 17. Rfe1 Bf7 18. c4 Qxd2 19. Nxd2 Nb6 20. Nb3 Na4 21.
Bf1 Rd7 22. Na5 Ne6 23. d5 Nd4 24. dxc6 Nxc6 25. Nxc6 25... bxc6 {} 26. c5 $1
26... Re8 27. Rxe8+ Bxe8 28. Bd6 Bf7 29. Rb1 Bd5 30. Rb8+ Kf7 31. Rf8+ Ke6 32.
g3 g6 33. Ba6 Rxd6 34. cxd6 Kxd6 35. Rxf6+ Ke5 36. Rf8 c5 37. Re8+ Kd4 38. Rd8
Ke5 39. f4+ Ke4 40. Bf1 Bb3 41. Kf2 Nb2 1-0
[Event "New York"]
[Site "?"]
[Date "1927.??.??"]
[Round "1"]
[White "Nimzowitsch, A."]
[Black "Capablanca, J."]
[Result "0-1"]
[ECO "D30"]
[Annotator "LCT II-Pos.6"]
[PlyCount "82"]
[EventDate "1927.??.??"]
1. c4 Nf6 2. Nf3 e6 3. d4 d5 4. e3 Be7 5. Nbd2 O-O 6. Bd3 c5 7. dxc5 Na6 8. O-O
Nxc5 9. Be2 b6 10. cxd5 Nxd5 11. Nb3 Bb7 12. Nxc5 Bxc5 13. Qa4 Qf6 14. Ba6 Bxa6
15. Qxa6 Nb4 16. Qe2 Rfd8 17. a3 Nd3 18. Ne1 Nxe1 19. Rxe1 Rac8 20. Rb1 Qe5 21.
g3 Qd5 22. b4 Bf8 23. Bb2 Qa2 24. Ra1 Qb3 25. Bd4 Rc2 26. Qa6 {} 26... e5 $1
27. Bxe5 Rdd2 28. Qb7 Rxf2 29. g4 Qe6 30. Bg3 Rxh2 31. Qf3 Rhg2+ 32. Qxg2 Rxg2+
33. Kxg2 Qxg4 34. Rad1 h5 35. Rd4 Qg5 36. Kh2 a5 37. Re2 axb4 38. axb4 Be7 39.
Re4 Bf6 40. Rf2 Qd5 41. Re8+ Kh7 0-1
[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Sachodjakin"]
[Black "Studie"]
[Result "1-0"]
[Annotator "Strategietest-24"]
[SetUp "1"]
[FEN "7k/4K1n1/8/6P1/8/3B4/8/8 w - - 0 1"]
[PlyCount "7"]
{} 1. Bg6 {The knight gets caged, and Black comes into Zugzwang. This is the
only winning move.} 1... Kg8 2. Bf7+ 2... Kh8 {Mit 2...Kh7 haelt sich Schwarz um
einen Zug laenger (M.S.)} 3. Kf6 Kh7 4. Ke5 4. Ke5 Kh8 5. Kf4 Kh7 6. Kg4 Kh8 7.
g6) 1-0
[Event "Leipzig"]
[Site "?"]
[Date "1960.??.??"]
[Round "?"]
[White "Letelier"]
[Black "Fischer"]
[Result "0-1"]
[ECO "E70"]
[Annotator "MR-Test"]
[PlyCount "46"]
[EventDate "1960.??.??"]
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. e5 Ne8 6. f4 d6 7. Be3 c5 8. dxc5
Nc6 9. cxd6 exd6 10. Ne4 Bf5 11. Ng3 Be6 12. Nf3 Qc7 13. Qb1 dxe5 14. f5 {}
14... e4 {An unexpected shot...}15. fxe6 (15. Qxe4 gxf5 16. Nxf5 16... Qa5+
{...wins a piece.}) 15... exf3 16. gxf3 f5 17. f4 Nf6 18. Be2 Rfe8 19. Kf2 Rxe6
20. Re1 Rae8 21. Bf3 Rxe3 22. Rxe3
Rxe3 23. Kxe3 Qxf4+ 0-1
[Event "?"]
[Site "?"]
[Date "1966.??.??"]
[Round "?"]
[White "Ehlvest"]
[Black "Schwarzman"]
[Result "1-0"]
[Annotator "Yazgac-Pos.6"]
[SetUp "1"]
[FEN "8/p2Q2p1/1k3qbp/1pn5/2p4P/2P2P2/5BPK/5B2 w - - 0 1"]
[PlyCount "3"]
[EventDate "1966.??.??"]
{} 1. g3 $3 1... a5 2. Bg2 1-0
[Event "Albena"]
[Site "?"]
[Date "1973.??.??"]
[Round "?"]
[White "Estrin"]
[Black "Pytel"]
[Result "*"]
[Annotator "LCT II-Pos.5"]
[SetUp "1"]
[FEN "2r2rk1/1p1bq3/p3p2p/3pPpp1/1P1Q4/P7/2P2PPP/2R1RBK1 b - - 0 1"]
[PlyCount "3"]
[EventDate "1973.??.??"]
{} 1... Bb5 $1 2. Bxb5 2... axb5 {
Followed by Rc4 and doubling the rooks in the c-file.} *
[Event "Helsinki zt"]
[Site "?"]
[Date "1972.??.??"]
[Round "?"]
[White "Hecht, H."]
[Black "Timman, J."]
[Result "1-0"]
[ECO "B40"]
[Annotator "Pos.Profil-04"]
[PlyCount "71"]
[EventDate "1972.??.??"]
1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 b5 5. Bg2 Bb7 6. d3 d6 7. O-O Be7 8. e5 d5
9. Ne2 h5 10. h4 Nh6 11. c3 Nc6 12. d4 cxd4 13. cxd4 Qb6 14. Bg5 Bf8 15. Bh3 a5
16. Nf4 Ng8 17. Rc1 Nge7 18. Re1 b4 19. Qa4 19... Nc8 {} 20. Nxe6 $1 20...
fxe6 21. Bxe6 N8e7 22. Rc5 {Der Bd5 laeuft nicht weg...} (22. Bxe7 Bxe7 23.
Bxd5 {White has 3 pawns, and connected passed pawns, for the knight.})
22... Rh6 23. Bxh6 gxh6 24. Rec1 Rd8 25. Ne1 Bg7 26. Rb5 Qa6 27. Rxb7 Qxb7 28.
Qd1 Ng6 29. Qxh5 Nce7 30. Nd3 Qb6 31. Nf4 a4 32. b3 axb3 33. axb3 Qa6 34. Rc7
Qa1+ 35. Kh2 Qxd4 36. Qxg6+ 1-0
[Event "?"]
[Site "?"]
[Date "1988.??.??"]
[Round "?"]
[White "Nielsen"]
[Black "Ratingtest"]
[Result "*"]
[Annotator "Pos.Profil-08"]
[SetUp "1"]
[FEN "1r1r2k1/2b1qp1p/b1p3p1/p1p1p3/2P1P3/1PN1BP2/P1Q3PP/R2R2K1 b - - 0 1"]
[PlyCount "1"]
[EventDate "1988.??.??"]
{} 1... Rd4 {With this sac, Black wants to undouble his isolated doubled pawn
and get a protected passed pawn.} *
[Event "Zagreb"]
[Site "?"]
[Date "1955.??.??"]
[Round "18"]
[White "Smyslov, V."]
[Black "Dueckstein, A."]
[Result "1-0"]
[ECO "C65"]
[Annotator "Yazgac-Pos.10"]
[PlyCount "59"]
[EventDate "1955.??.??"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. d3 d6 6. Nc3 O-O 7. Bg5 h6 8. Bh4
Bg4 9. Bxc6 bxc6 10. h3 Bxf3 11. Qxf3 g5 12. Bg3 Nh7 13. Na4 Bb6 14. Nxb6 axb6
15. d4 exd4 16. Qd3 f5 17. exf5 Ra5 18. Qxd4 Qd7 19. Qc4+ Kg7 20. b4 Raxf5 21.
a4 Nf6 22. a5 bxa5 23. bxa5 Rc5 24. Qa4 Ra8 25. a6 Qf5 26. Rfe1 26... Kf8 {}
27. c4 $1 {prevents Rc5-b5, in addition to that the pawn is moved out of the
attack.} (27. a7 Rb5 (27... Qxc2 $2 28. Reb1)) 27... Nd7 28. Qb4 Nb6 29. Bxd6+
cxd6 30. Qxb6 1-0
-----
I'm not satisfied anymore with no. 29, 32 and 34 (but did not yet find good
replacements). No. 28 is meant to be tested without tablebases.
Regards,
M.Scheidl
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