Not logged inRybka Chess Community Forum
Up Topic The Rybka Lounge / Computer Chess / Lindores Abbey Rapid Challenge
- By MrKris (***) Date 2020-05-22 02:51
Speaking of Chess.com -the Komodo N odds vs. Lenderman match, this seems like an interesting event, same G/15'+10" but no draw offers before move 40:
https://www.chess.com/news/view/lindores-abbey-rapid-challenge-day-2

After 23.Nc7, ShashChess 11 Tal (Arena just started, no prior analysis) finds black's winning move in under 1 second:
r4rk1/1pN4p/4p3/p1p1n2q/Pb2P3/4Bp1P/1PQ3P1/R4RK1 b - - 1 23
[Event "Lindores Abbey Rapid Challenge"]
[Site "Online"]
[Date "2020.05.20"]
[Round "5.3"]
[White "Yu, Yangyi"]
[Black "Carlsen, Magnus"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2738"]
[BlackElo "2881"]
[Annotator "chessvibes"]
[PlyCount "87"]
[EventDate "2020.??.??"]
[EventType "rapid"]
[WhiteTeam "China"]
[BlackTeam "Norway"]
[WhiteTeamCountry "CHN"]
[BlackTeamCountry "NOR"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 a5 (6... Bd6 7. Be2
dxc4 8. Bxc4 b5 9. Be2 Bb7 10. O-O O-O 11. b3 a6 12. Bb2 c5 {Bu,X (2705)
-Carlsen,M (2863) chess24.com INT 2020}) 7. a4 N (7. h3 Be7 8. g4 dxc4 9. Bxc4
b5 10. Bd3 b4 11. Ne4 Nxe4 12. Bxe4 Bb7 13. Nd2 Rc8 {Mamedyarov,S (2764)
-Dubov,D (2699) chess24.com INT 2020}) 7... Bd6 8. Be2 O-O 9. O-O dxc4 10. Bxc4
e5 11. Ba2 Qe7 12. h3 Bb4 13. dxe5 Nxe5 14. Nd4 c5 15. Ndb5 Be6 16. Bxe6 fxe6
17. e4?! (17. b3 Rad8 18. Bb2 Nd3 19. Rad1 Nxb2 20. Qxb2) 17... Nh5 18. Ne2 g5!
{Both preventing f2-f4 and starting an attack.} 19. Be3?! (19. Bd2 g4 20. Bc3)
19... g4 {Now the attack is rather strong.} 20. Ng3 Qh4 21. Nxh5 Qxh5 22. f4
gxf3 23. Nc7 fxg2? ({Carlsen could have finished a wonderfully played game with
the brilliant ---Diagram---} 23... Rf6!! 24. Nxa8 Rg6 25. Rf2 Qxh3 26. Raf1 {and since White
is completely stuck here, Black can quietly continue with} 26... c4!! {to first
protect the f8 -quare and after e.g.} 27. Nb6 Rg3! 28. Rxf3 Ng4 {and wins.}) 24.
Qxg2+ Kh8 25. Nxe6?! (25. Bg5 =) 25... Rg8 26. Bg5 Rxg5 27. Qxg5 Qxg5+ 28. Nxg5
Rg8 29. h4 h6 30. Rf5 Nd3 (30... Nc4! 31. b3 Nd2) 31. b3 hxg5 32. hxg5 Kg7 33.
Rd1 c4 34. bxc4 Nc5 35. Re5 Rc8 36. Kg2 Rc7 37. Rd8 Nxa4 38. Ree8 Nc5 39. Kf3 a4
40. Kg4 a3? {Allowing a mating net.} (40... Rd7) (40... Nd7) 41. Rg8+ Kf7 42.
Kf5! Nd7 43. g6+ Ke7 44. e5 1-0

Brief Lc0 and Honey analysis added between the @@'s, they agreed quite well with the excellent commentary: [Event "Lindores Abbey Rapid Challenge"]
[Site "?"]
[Date "2020.05.20"]
[Round "7.4"]
[White "Duda, Jan-Krzysztof"]
[Black "Carlsen, Magnus"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2774"]
[BlackElo "2881"]
[Annotator "Bojkov,Dejan"]
[PlyCount "85"]
[EventDate "2020.??.??"]
[EventType "rapid"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5
{Quite a sharp opening choice by Duda, and excellent for blitz and rapid
chess.} d6 8. Nxf6+ gxf6 9. Qh5 {White managed to destroy the opponent's
kingside but at the expense of a big delay with his development. Therefore,
Carlsen classically strikes in the center.} d5 ({The computer's first
choice is} 9. .. e4 {and it has been played in games already.}) 10. a3 Bf8
11. Bd3 ({A curious GM miniature was played in the line} 11. cxd5 Qxd5 12.
d3 Na5 13. Bd2 Nb3 14. Rd1 Nxd2 15. Nxd2 Qe6 16. g4 f5 17. gxf5 Qxf5 18.
Rg1+ Bg7 {and Black resigned not waiting for the obvious Qh5-h6 in
Nyzhnyk,I (2605)-Hungaski,R (2526) Middleton 2018}) 11. .. e4 12. cxd5 exd3
13. dxc6 bxc6 14. b4 a5 {Attacking the weakened queenside before the
opponent brings out the reserves.} ({Another way to pursue the same idea is
connected with the preliminary trade of the queens in the line} 14. .. Qd5
{@@> 30 seconds: Lc0 24.1 sv3010 -0.04 (very very slight disadvantage), Honey
043020 0.00. <@@} 15. Qxd5 cxd5 16. Bb2 a5 17. bxa5 Rxa5 18. Bxf6 Rxa3 19.
O-O Rxa1 20. Rxa1 c5 {with unclear play.}) 15. Bb2 Re4 ({More accurate
seems} 15. .. axb4 16. axb4 Rxa1+ 17. Bxa1 Re4 {Then after:} (17. .. Bxb4
{is less accurate as the bishop is needed to defend the black kingside, and
the simple} 18. O-O {promises White more than enough for a pawn.}) 18. O-O
Rxb4 19. Bc3 Ra4 20. Rb1 {The weakened black king promises eternal
compensation for the pawn in the middlegame for Duda.}) 16. Nd4 Qd5 ({An
email game went} 16. .. Rg4 17. Nxc6 Qd7 18. b5 Rxg2 19. h4 Rg6 20. Rc1
{Strangely, it was Black who attacked on the kingside here first, Lanzani,P
(1891)-Besozzi,F ICCF email 2008} ({@@>} 20. f4 {1 minute: Lc0 +0.80, Honey
+0.20. <@@})) ({Black's previous move allows an extra possibility to Duda
in the line} 16. .. axb4 {@@> 47 seconds: Lc0 -0.34, Honey -0.33. <@@} 17.
Nxc6 Qd6 18. Nxb4) 17. Qxd5 ! {@@> 33 seconds: Lc0 +1.92, Honey +1.13. <@@
Carlsen must have underestimated this capture. White's initiative develops
rapidly due to the many weak pawns of the opponent.} cxd5 18. f3 Re8
({Since} 18. .. Re7 19. b5 ! a4 20. Kf2 {is clearly better for White.}) 19.
Nb5 {Threat, threat, threat is best when developing the initiative.}
({Whereas} 19. b5 a4 {promises Black temporary relief.}) 19. .. Re7 ({The
ugly pawn structure in the line} 19. .. Bd6 20. Nxd6 cxd6 21. Kf2 {spells
trouble for the world champion.}) 20. Bxf6 Rd7 21. Kf2 {Duda not only has a
pawn, he managed to connect his rooks and brought his bishop into striking
distance to the black king. This means White's attack remains strong in the
endgame as well.} Ba6 ({White's b4-pawn is immune in the line} 21. .. axb4
22. axb4 Rxa1 23. Rxa1 Bxb4 ? 24. Ra8) ({But perhaps} 21. .. c6 22. Nc3 Ra6
{in order to solidify the queenside is a more resilient defense.}) 22. Nd4
Bc4 ({Once again} 22. .. axb4 23. axb4 Bxb4 {is overoptimistic to say the
least for Black as he is not only pinned along the a-file:} 24. Nc6 Bf8 25.
Ra4 Bb7 {but mated as well:} 26. Rg4+) 23. Rhb1 {Only here did Duda slow
down a bit but in vain!} (23. Nf5 ! {@@> 30 seconds: Lc0 24.1 +3.76,
Honey +1.78. <@@ Intending to attack the black king either along the
eighth rank or the g-file would have been great for White instead. Then}
Ra6 {can be met with} ({Please note that the queenside can be sealed:} 23.
.. a4 {but then the attack will run from the opposite wing with} 24. h4
{followed by Rh1-h3-g3.}) 24. Bc3 axb4 25. axb4 Rd8 26. Rxa6 Bxa6 27. Ra1
{with a clear edge for the first player.}) 23. .. Ra6 24. Be5 ({After} 24.
Bh4 {Carlsen would have most likely blocked the queenside anyway:} a4) 24.
.. f6 ({Here} 24. .. a4 {gives White a chance to keep his bishop on the
long diagonal:} 25. Nf5 f6 26. Bd4) ({Once more the b4-pawn is not edible:}
24. .. axb4 25. axb4 Rxa1 26. Rxa1 Bxb4 27. Ra8+ Bf8 28. Bf6 ! {paralyzes
Black, and there is no defense against the knight's decisive reinforcement
via f5.}) 25. b5 ! {An important intermediate move.} ({Instead:} 25. Bf4
axb4 26. axb4 Rxa1 27. Rxa1 Bxb4 {would have finally allowed Black a chance
to gobble the pawn.}) 25. .. Rb6 26. Bf4 a4 ! {Carlsen claims the b5-pawn
in return.} 27. g4 {Whereas Duda once more builds his kingside initiative.}
Bc5 28. h4 Kf7 {Black is in no rush to capture on b5.} ({Nothing is
fundamentally changed in the line} 28. .. Bxd4 29. exd4 Rxb5 (29. .. Bxb5
30. Rb4) 30. Rxb5 Bxb5 31. Rb1 c6 32. g5 {White keeps on pressurizing his
opponent, and Black has chances to survive.}) 29. Kg3 (29. g5 !?) 29. ..
Bxd4 30. exd4 Bxb5 ({It made good sense to get rid of a rook pair:} 30. ..
Rxb5 31. Rxb5 Bxb5 32. g5 {as the fewer the major pieces, the stronger the
drawing chances.}) 31. Rb4 (31. g5 !? {@@> 30 seconds: Lc0 sv3010 +2.50,
Honey latest +1.16. <@@}) 31. .. Re7 {A slip!} ({Carlsen needed to throw in
the move} 31. .. c6 {and although after} 32. g5 {his position remains
difficult, he would still have been in the game.}) 32. Rab1 {@@> 10
seconds: Lc0 +3.63, Honey +1.95 <@@} Bc4 ({Now} 32. .. c6 {does not work
due to} 33. Rxa4) 33. Rxb6 cxb6 34. Rxb6 {Duda wins a pawn again, and this
time he does not let his opponent go.} Bb3 35. Bd6 ! {Forcing the rook to
concede something.} Rd7 ({Or} 35. .. Re2 36. Rb7+ {when Black can easily be
checkmated in the opposite-colored bishop attack after} Ke6 ({Or lose
prosaically after} 36. .. Kg8 37. Bf4) 37. Bb4) 36. f4 f5 37. g5 Bd1 38.
Bc5 Kg7 39. Kf2 Rd8 40. Rb7+ Kg6 ({There is no way to defend all the
weaknesses after} 40. .. Kg8 41. Bb4) 41. Re7 Rb8 42. Re6+ Kh5 {This leads
to mate, but there is no way out.} (42. .. Kf7 43. Rd6 Bb3 44. h5 {would be
pretty much over as well.}) 43. Kg3 1-0
Above diagram: FEN: r4rk1/1pN4p/4p3/p1p1n2q/Pb2P3/4Bp1P/1PQ3P1/R4RK1 b - - 1 23 
ShashChess 11 Tal:
Found 510 tablebases
  1/1  00:00            2k  1,184k  +0.29  23. ... Rac8 24.Nxe6
...
 13/24  00:00          846k  18,382k  +0.33  23. ... Kh8 24.Nxa8 Rg8 25.Rf2 Qxh3 26.Bf4 Nd3 27.Bh2 c4 28.Raf1 fxg2 29.Rxg2 Rxa8 30.Kh1 Rg8 31.Rxg8+ Kxg8 32.Qg2+ Qxg2+ 33.Kxg2 Nxb2 34.Be5 Nxa4
 14/29  00:00        1,113k  18,864k  +1.71  23. ... Rf6 24.Nxa8 Rg6 25.Rf2 Qxh3 26.Bf4 Nd3
 15/20  00:00        1,184k  18,795k  +3.55  23. ... Rf6 24.Nxa8 Rg6 25.Rf2 Qxh3 26.Raf1 c4 27.Bd4 Bd6 28.Bxe5 Bxe5
 16/28  00:00        2,160k  19,641k  +2.06  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Ne1 28.Rxe1 Bxe1 29.Nb6 Bg3 30.Nc4 Qc7 31.Qd3 Bf4 32.Qb3 Qc6 33.Qb5 Qxb5 34.axb5 Bc7 35.Bxc5
 17/32  00:00        3,261k  20,008k  +2.22  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Nd2 28.Qd3 Qg5 29.g4 c4 30.Qe3 Qf6 31.Rd1 Qxb2 32.Nb6 c3 33.Qd3
 18/39  00:00        4,442k  20,472k  +2.24  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Nd2 28.Qd3 Qg5 29.Qe2 Qd8 30.Rd1 Qxa8 31.Rxd2 Bxd2 32.Qxd2 b6 33.Qd3 Qf8 34.Bh2 Qf6 35.Bg3 Qd4 36.Qa6 Rf6 37.Kh2 Qxb2 38.Qc8+ Kg7 39.e5 Rf1 40.Qxe6
 19/39  00:00        5,816k  20,844k  +2.47  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Nd2 28.Qd3 Qg5 29.Qe2 Qd8 30.Rd1 Qxa8 31.Rxd2 Bxd2 32.Qxd2 b6 33.Qd3 Qf8 34.Bh2 Qf6 35.Qa6 Kg7 36.Qe2 Qd4
 20/51  00:00        8,731k  21,348k  +2.45  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Nd2 28.Qd3 Qg5 29.Qe2 Qd8 30.Rd1 Qxa8 31.Rxd2 Bxd2 32.Qxd2 b6 33.Bh2 Qxe4 34.Qd8+ Kf7 35.Qc7+ Kf6 36.Bg3 Rg7 37.Qd8+ Kg6 38.Qe8+ Rf7 39.Qg8+ Kf6 40.Qh8+ Ke7 41.Kh2 Qxa4 42.Qc8 Qd4 43.Qb7+ Kf6 44.Qxb6 Rg7
 21/47  00:00        9,170k  21,376k  +2.78  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Nd2 28.Qd3 Qg5 29.Qe2 Qd8 30.Rd1 Qxa8 31.Rxd2 Bxd2 32.Qxd2 b6 33.Bf2 Qxe4 34.Qd8+ Kf7 35.Bg3 Rf6 36.Kh2 Rf1 37.Qxb6 Qe3 38.h4 Qc1 39.Qc7+ Kg6 40.h5+ Kh6
 22/53  00:00       13,333k  21,715k  +2.68  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Nd2 28.Qd3 Qg5 29.Qe2 Qd8 30.Rd1 Qxa8 31.Rxd2 Bxd2 32.Qxd2 b6 33.Bh2 Qxe4 34.Qd8+ Kf7 35.Qd7+ Kf6 36.Qd8+ Kf5 37.Qf8+ Rf6 38.Qg7 Qe1+ 39.Bg1 Qh4 40.Qb7 e5 41.Qd7+ Kf4 42.Qd2+ Ke4 43.Qc2+ Kd5 44.Qd1+ Ke6 45.Qd8
 23/47  00:00       14,637k  21,814k  +2.70  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Qe5 27.Bg1 Nd2 28.Qd3 Qg5 29.Qe2 Qd8 30.Rd1 Qxa8 31.Rxd2 Bxd2 32.Qxd2 b6 33.Bh2 Qxe4 34.Qd8+ Kf7 35.Qd7+ Kf6 36.Qd8+ Kf5 37.Qf8+ Rf6 38.Qg7 Qe1+ 39.Bg1 Qh4 40.Qb7 e5 41.Qd7+ Kf4 42.Qd2+ Ke4 43.Qc2+ Kd5 44.Qd1+ Kc6 45.Qd8 e4 46.Qa8+ Kd6
 24/53  00:01       19,822k  22,123k  +5.13  23. ... Rf6 24.Nxa8 Rg6 25.Rf2 Qxh3 26.Raf1 c4 27.Nb6 fxg2 28.Rxg2 Qxe3+ 29.Qf2 Bc5 30.Qxe3 Bxe3+ 31.Kh1 Bxb6 32.Rxg6+ hxg6 33.Kg2 Bd4
...
 29/63  00:05      118,002k  24,004k  +7.32  23. ... Rf6 24.Nxa8 Rg6 25.Rxf3 Nxf3+ 26.Kh1 Rg3 27.Bf4 Rxh3+ 28.gxh3 Qxh3+ 29.Bh2 Bd2 30.Rg1+ Kf7 31.Rg2 Nxh2 32.Rg3 Qxg3 33.Qxd2 Ng4 34.Qg2 Qe1+ 35.Qg1 Qxe4+ 36.Qg2 Qe1+ 37.Qg1 Qe2 38.Qg2 Qd1+ 39.Qg1 Qd5+ 40.Qg2 Ne3 41.Qxd5 exd5 42.Kg1 d4 43.Kf2 Nd1+ 44.Ke2 Nxb2 45.Nb6 h5 46.Nd7 Nxa4 47.Ne5+ Ke6 48.Nf3 Nc3+ 49.Kd3 Kd5
Up Topic The Rybka Lounge / Computer Chess / Lindores Abbey Rapid Challenge

Powered by mwForum 2.27.4 © 1999-2012 Markus Wichitill