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Up Topic The Rybka Lounge / Test Positions / Appealing imbalance test position
- - By QueensideCastler (**) Date 2019-04-11 17:39 Edited 2019-04-13 14:30
White's advantage is 0.75 - 1.00

r2q2k1/p1p3pp/2p5/3p1b2/8/2P2N2/PP3KPP/R1B2B1R b - - 0 14


[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[PlyCount "27"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Bc5 6. dxc6 Bxf2+ 7. Ke2 bxc6 8.
Qa4 f5 9. Nbd2 O-O 10. Nxe4 fxe4 11. Qxe4 d5 12. Qxe5 Rf5 13. Qxf5 Bxf5 14.
Kxf2 *


Another position:

Bnb3k1/p4pbp/1p3np1/4r3/2P5/2N4P/PP3PP1/3R1RK1 b - - 0 16


Analysis by Stockfish 120419 64 BMI2:

16...h5 17.Nb5 Bd7 18.Rfe1 Rxe1+ 19.Rxe1 a5 20.Rd1 Bf8 21.Bb7 Kg7 22.Kf1 Be6 23.b3 Bc5 24.Nc3 Bd7 25.h4 Kf8 26.Nb5 Ng4 27.Rd2 Bb4 28.Rd4 Ke7 29.Re4+ Kf6 30.Rd4 Ne5 31.Be4 Bc5 32.Rd1 Ng4 33.Rd2 Ke7 34.Nc3 Nf6 35.Bb7 Nc6 36.Re2+ Kf8 37.Na4 Bd4 38.Bxc6 Bxc6 39.Rd2
  Black is better: -/+ (-1.26)  Depth: 41/59   00:05:10  4735MN, tb=9503
(13.04.2019)
Parent - - By QueensideCastler (**) Date 2019-04-16 12:34 Edited 2019-04-16 12:57
Here stockfish dev or equivalent (brainfish) can play the white side against komodo.

r1b1nrk1/p3n1bp/3p2p1/3Ppp2/2p1P3/PP2B1PP/5PB1/2Q1R1K1 w - - 0 21


[Event "Fagernes GM-A 2019"]
[Site "Fagernes"]
[Date "2019.04.16"]
[Round "3.16"]
[White "Dahl, Trygve"]
[Black "Isha Sharma"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "2275"]
[BlackElo "1989"]
[PlyCount "90"]
[EventDate "2019.04.14"]
[EventType "swiss"]
[EventCountry "NOR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. g3 Nc6 4. Bg2 Nf6 5. d3 g6 6. O-O Bg7 7. Re1 d6 8. c3 e5
9. h3 O-O 10. d4 cxd4 11. cxd4 Qb6 12. d5 Ne7 13. Nc3 Ne8 14. Nd2 f5 15. Nc4
Qc5 16. b3 b5 17. Be3 Qb4 18. a3 Qxc3 19. Rc1 Qxc1 20. Qxc1 bxc4 21. bxc4 fxe4
22. c5 Nxd5 23. cxd6 Nxe3 24. Qc6 Nxg2 25. Rb1 Bxh3 26. Qxa8 e3 27. fxe3 Nxd6
28. Qxa7 Bh6 29. Kh2 Bf5 30. Rb8 Nxe3 31. Rxf8+ Kxf8 32. Qb8+ Ke7 33. Qc7+ Bd7
34. a4 Nd5 35. Qa5 Ke6 36. Qa8 Ne7 37. a5 Be3 38. Qb8 Nb5 39. a6 h5 40. Qd8 Ba7
41. Qa5 e4 42. Qa2+ Nd5 43. Qc2 Ke5 44. Qb2+ Bd4 45. Qc2 Ba7 0-1

Brief server analysis -  https://lichess.org/XikvqBQ0#40

Analysis by Brainfish 140419 64 BMI2:

21.bxc4 fxe4 22.g4 Ba6 23.Rd1 Rc8 24.Bf1 Nf6 25.c5 Bxf1 26.Kxf1 h5 27.g5 Nfxd5 28.Qc4 dxc5 29.Rxd5 Nxd5 30.Qxd5+ Kh7 31.Qc4 Rc7 32.Kg2 Rfc8 33.a4 Rd8 34.Kg3 Rb8 35.a5 Rd8 36.Kg2 Rd1 37.a6 Rd3 38.Kf1 Rdd7 39.Kg1 Rd8 40.Kf1 Rb8 41.Kg2 Rf8 42.Kg3 Rfc8 43.Kh2
  Black is better: -/+ (-1.20 --)  Depth: 35/56   00:01:01  899MN, tb=490
(16.04.2019)

Analysis by Houdini 6.03 Pro x64-pext:

21.bxc4 fxe4 22.g4 Ba6 23.c5 Rc8 24.Bxe4 dxc5 25.Bh6 Bxh6 26.Qxh6 Nd6 27.Bg2 c4 28.Qe3 Rc7 29.Qxe5 Nec8 30.Qg5 Re8 31.Rxe8+ Nxe8 32.d6 Ncxd6 33.Bd5+ Nf7 34.Qe5 Kf8 35.Qc3 Bc8 36.f4 Ned6 37.Qa5 Re7 38.Bxf7
  Black is better: -/+ (-0.82 ++)  Depth: 28/63   00:01:04  1171MN, tb=683
(16.04.2019)

Analysis by Komodo 12.3 64-bit:

21.bxc4 fxe4 22.c5
  Black is better: -/+ (-1.20 --)  Depth: 32   00:01:01  852MN, tb=13331
(16.04.2019)

<-------------->

Houdini with default contempt during analysis

Analysis by Houdini 6.03 Pro x64-pext:

21.bxc4 fxe4 22.g4 Ba6 23.Bxe4 Rc8 24.c5 dxc5 25.Bh6 Bxh6 26.Qxh6 Nd6 27.Bg2 Nf7 28.Qc1 Rfd8 29.f4 e4 30.Rxe4 Nxd5 31.Ra4 Bb5 32.Rxa7 c4 33.f5 c3 34.Ra5 Bc4 35.Be4 Rd6 36.fxg6
  Black is better: -/+ (-1.05)  Depth: 27/56   00:01:24  1547MN, tb=437
(16.04.2019)

<-------------------------------->

Average evaluation: -1,15 edge for black

<-------------------------------->
Parent - - By QueensideCastler (**) Date 2019-04-24 09:54
rn3b1r/2kn4/p7/1p1Q1Bpp/7q/8/PPP3PP/1K1RR3 b - - 0 22


[Event "https://lichess.org/pGSwa2se"]
[Site "https://lichess.org/pGSwa2se"]
[Date "2005.??.??"]
[Round "?"]
[White "Pol 12...Qe5 13.Bd3"]
[Black "?"]
[Result "*"]
[ECO "B96"]
[Annotator "lichess.org"]
[PlyCount "43"]
[EventDate "2005.??.??"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 $6 {
(0.00 ? 0.60) Inaccuracy. Best move was Qb6.} (7... Qb6 8. Qd2 Qxb2 9. Rb1 Qa3
10. f5 Nc6 11. fxe6 fxe6 12. Nxc6) 8. e5 dxe5 9. fxe5 Qc7 10. Qe2 {B96
Sicilian Defense: Najdorf Variation, Polugaevsky Variation, Simagin Line} Nfd7
11. O-O-O Bb7 12. Qg4 Qxe5 $2 {(-0.03 ? 1.36) Mistake. Best move was Qb6.} (
12... Qb6) 13. Bd3 h6 14. Bh4 g5 15. Nxe6 h5 16. Qh3 fxe6 17. Rhe1 Qf4+ 18. Kb1
Qxh4 $2 {(0.67 ? 1.85) Mistake. Best move was Be7.} (18... Be7) (18... Qg4) 19.
Qxe6+ Kd8 20. Bf5 Kc7 21. Nd5+ $6 {(2.53 ? 1.67) Inaccuracy. Best move was
Rxd7+.} (21. Rxd7+ Nxd7) 21... Bxd5 22. Qxd5 {Unterminated} *



Analysis by Stockfish 200419 64 BMI2 Ultimaiq:

22...Rh6 23.Qxa8 Rd6 24.Qa7+ Kd8 25.g3 Qxh2 26.Qe3 Qg2 27.Qxg5+ Kc7 28.Qf4 Qc6 29.a3 Kb6 30.b4 a5 31.Qe3+ Kc7 32.Qa7+ Qb7 33.Qxa5+ Qb6 34.Qxb6+ Rxb6 35.Re8 Bd6 36.Rg8 Rc6 37.Rg7 Rc3 38.Rd3 Be5 39.Rxc3+ Bxc3 40.Rh7 Be5 41.Bd3 Kb6 42.Rxh5 Nc6 43.g4 Nf6 44.Rg5 Nd5 45.c4 bxc4 46.Bxc4 Ne3 47.Be2 Bf4 48.Rb5+ Kc7 49.g5 Nd4 50.Rc5+ Kd6 51.g6 Ke7 52.Bd3 Kf6 53.Rh5
  White is clearly better: +- (1.92)  Depth: 40/73   00:04:12  3808MN, tb=1399442
(24.04.2019)
Parent - By QueensideCastler (**) Date 2019-05-08 18:33
Ideal Komodo vs Stockfish and vice versa. Black is better but not more than 1.2 - 1.4 pawns.

r1b1kr2/pp3ppp/2n5/8/8/2P5/PP4PP/RNB1KBNn w q - 0 10


[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[PlyCount "18"]

1. e4 c5 2. c3 d6 3. d4 Nf6 4. dxc5 Nc6 5. cxd6 Nxe4 6. dxe7 Qxd1+ 7. Kxd1
Nxf2+ 8. Ke1 Nxh1 9. exf8=Q+ Rxf8 *
Up Topic The Rybka Lounge / Test Positions / Appealing imbalance test position

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