Our Game of the Week is actually two of Daniel's games from Trois-Rivières: his first round win over a Master, and his last round loss against GM Sambuev.... from a position where Daniel had a forced draw one move from the end, but missed it while playing on increment!
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[Event "Trois-Rivieres op"]
[Site "Trois-Rivieres CAN"]
[Date "2018.03.16"]
[Round "1.9"]
[White "Xu, Daniel"]
[Black "Beaulieu, Eric"]
[Result "1-0"]
[ECO "D58"]
[WhiteElo "2006"]
[BlackElo "2307"]
[Annotator "John Upper"]
[PlyCount "49"]
[EventDate "2018.03.16"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "CAN"]
1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Bg5 Be7 5. e3 O-O 6. Nc3 h6 7. Bh4 b6 8. Bd3
Bb7 9. O-O Nbd7 10. Qe2 c5 {[#]A standard Tartakower QGD position. Both sides
have to be ready for pawn exchanges leading to an IQP for White or hanging
pawns for Black.} 11. cxd5 (11. Rfd1 Ne4 12. Bg3 cxd4 13. exd4 Ndf6 14. Rac1
Rc8 15. Bxe4 Nxe4 16. Nxe4 dxe4 17. Ne5 Qe8 $1 {guarding g6 to threatening to
win a piece with ...f6-f5-f4.} 18. f4 exf3 19. Nxf3 Bf6 20. Bd6 Be7 21. Bg3 Bf6
22. Bd6 Be7 23. Bg3 {½-½ Short,N (2675)-Adams,M (2751) Gibraltar, 2017.})
11... exd5 12. Rac1 c4 $6 {I'm reluctant to call this move "principled", but
it does shut down the Rc1 and cut across White's play against d5 via dxc5 and
Ba6.} (12... Ne4 13. Bxe7 Qxe7 14. Ba6 Ndf6 15. Bxb7 Qxb7 16. dxc5 bxc5 17.
Nxe4 Nxe4 {The kind of position I'd expect Seirawan would like: his king is
safe and he has Black's hanging pawns to "gnaw on". But watch how quickly
Black turns those pawns into a winning advantage after only a few slow moves
by White.} 18. Rc2 Rfe8 19. Qd3 Rad8 20. h3 Qb6 21. Nd2 c4 $1 22. Qe2 (22. Qd4
Qxd4 23. exd4 Nxd2 24. Rxd2 Rb8 $15) 22... d4 $1 23. Nxc4 d3 $19 24. Qf3 Ng5
25. Qf5 g6 26. Nxb6 {White has two pieces hanging after Black recaptures the Q,
so 0-1 Seirawan,Y (2620)-Bacrot,E (2697) Berlin (World Rapid), 2015.}) 13. Bb1
a6 14. Qc2 b5 15. Ne5 {[#]Critical Position White threatens to remove the
defender of h7 with Nxd7 then Bxf6.} Nxe5 $2 (15... g6 $4 {and White can play
the rest "by hand"} 16. Nxg6 $18 {wins a pawn or at least three pawns for the
N with a huge attack.}) (15... Re8 $5 {concedes h7 but makes a space for the K}
16. Nxd7 Qxd7 17. Bxf6 Bxf6 18. Qh7+ Kf8 19. e4 $6 (19. Rfe1 $1 {N}) 19... g6
$2 (19... dxe4 $15) 20. e5 Bg7 21. f4 $18 {1-0 (34) Bocharov,D (2526)-Bragin,A
(2255) Tomsk, 2003.}) (15... Ne4 $1 {is the computer's choice, leading to a
complex position} 16. Nxd7 $1 Qxd7 (16... Bxh4 $2 {puts the B off-side} 17. Nc5
$1 Qe7 18. f3 Nf6 19. Nxb7 Qxb7 20. g3 $18 {and f4 traps the B}) 17. Bxe7 Qxe7
18. f3 Nf6 19. e4 b4 20. e5 (20. Nxd5 $2 Bxd5 $1 $15) 20... bxc3 21. exf6 (21.
bxc3 g6 $11) 21... Qe3+ 22. Kh1 g6 $13) 16. dxe5 Ne4 {Only move.} 17. Bxe7 Qxe7 18. f3 $1
$16 Qxe5 $2 (18... Ng5 19. h4 Qxe5 20. hxg5 Qxe3+ 21. Rf2 g6 22. Qd2 $1 Qxg5 {
Black has some pawns for the N, but his d5 pawn is doomed.}) 19. fxe4 dxe4 20.
Nxe4 f5 21. Qc3 $1 Qd5 22. Rcd1 $1 b4 {Desperation.} (22... Qc6 23. Rd6 {Only move.} $18
{breaks the battery on g2 before moving the N.}) 23. Qxb4 Qc6 24. Rd6 Qc7 25.
Ng3 1-0
[Event "Trois-Rivieres op"]
[Site "Trois-Rivieres CAN"]
[Date "2018.03.18"]
[Round "5.5"]
[White "Sambuev, Bator"]
[Black "Xu, Daniel"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "2518"]
[BlackElo "2006"]
[Annotator "John Upper"]
[PlyCount "95"]
[EventDate "2018.03.16"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "CAN"]
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Be7 (5... c5 $1 {taking
advantage of the absence of Nc3 is popular, and the best-scoring for Black.})
6. Bd3 Nbd7 7. O-O O-O 8. b3 b6 9. Bb2 Bb7 10. Qe2 Qc7 (10... c5 11. Rfd1 cxd4
12. exd4 dxc4 13. bxc4 Re8 14. Ne5 Nxe5 15. dxe5 Nd7 16. Ne4 Qc7 17. Nd6 Bxd6
18. exd6 Qc6 19. Qg4 e5 $13 {(½-½, 55) Alekhine,A-Bogoljubow,E W Ch g25,
1929.}) 11. Rac1 Rac8 12. cxd5 exd5 (12... Nxd5 $5 13. g3 {and Black has some
tough decisions about how to cope with e3-e4.}) 13. Ne5 c5 14. Bf5 Rcd8 15. f4
$5 Rfe8 16. Rf3 g6 17. Rg3 Bf8 18. Ndf3 {[#]White has massed his pieces for a
kingside attack, but Black keeps cool.} Bg7 (18... Nxe5 19. fxe5 (19. Nxe5 Bc8
$11) 19... Nh5 20. Rg4 Ng7 $13) 19. Ng5 Nxe5 20. dxe5 $6 {A surprising
recapture. I don't know why White rejected the more natural fxe5.} (20. fxe5
Ne4 21. Nxe4 dxe4 22. Qg4 $14 {attacking e4 and keeping pressure on the
kingside; for example,} Qc6 23. h4 Kf8 24. h5 Bh6 {trying to trap the B} 25.
hxg6 hxg6 26. e6 $1 (26. Rf1 $5) 26... gxf5 27. Qg8+ Ke7 28. Qxf7+ Kd6 29.
dxc5+ {will win the Q at least.}) 20... Ne4 21. Nxe4 dxe4 22. h4 Kf8 $1 {
Unpinning the g6 pawn and asking the Bf5 its intentions.} 23. Bh3 {White
doesn't have to retreat the Bf5.} (23. b4 $5 gxf5 24. Qh5 {threatening Rxg7
then e6.} Re6 $1 (24... a6 25. Rxg7 Kxg7 26. e6+) 25. Qxh7 Rg6 26. Rxg6 fxg6
27. Qxg6 $14 {White has two pawns for the piece, and with Black's Bs blocked
and K exposed, good chances to get a third.}) 23... Bc8 24. h5 Bxh3 25. Rxh3 {
[#]} Qd7 $4 {This should lose a piece.} (25... Rd3 $142 $11) 26. hxg6 $2 (26.
h6 $1 Bh8 27. e6 $18 {with a double attack on d7 and h8.}) 26... hxg6 27. Bc3
Qe6 28. Qc4 $5 {Very uncharacteristic for Sambuev, who usually tries to keep
balanced positions complex.} Qxc4 29. bxc4 Rd3 30. Kf2 Red8 31. Ke2 Ke7 32. Rh7
Rg8 (32... Rh8 $2 {will not trap the R} 33. Rxg7 Kf8 34. e6 (34. Rxf7+ {
also works.}) 34... Rxc3 35. Rxf7+ $18) 33. Bb2 Rgd8 34. Rc2 Bf8 35. Rh1 Bg7
36. Rh7 Bf8 37. Bc3 Rd1 38. Be1 Ke6 39. g4 Rb1 (39... R8d7 $1 {defending f7 so
the K can restrict the center pawns.}) 40. Bh4 {[#]Critical Position Black's K
is in a small box, but (surprisingly) so is White's! Can you see how Black can
hold?} Rdd1 $4 (40... Rh1 $1 41. Bxd8 Rxh7 $11) (40... Rd7 $1 41. Rh8 Be7 (
41... Rh1 $1) 42. Re8 Rh1 43. f5+ gxf5 44. gxf5+ Kxf5 45. Rxe7 Rh2+ $1 46. Ke1
(46. Kf1 $4 Rd1+ 47. Be1 Rxc2) 46... Rh1+ $11) 41. f5+ $1 $18 gxf5 42. gxf5+
Kxf5 (42... Kxe5 43. Rxf7 Bd6 44. Bg3#) 43. Rxf7+ Kg4 44. Rf4+ Kh5 45. e6 Rh1 {
[#]} 46. Rxf8 $4 (46. Rd2 $1 $18 Rxh4 47. Rd5+ {Only move.} $18) (46. e7 {also wins} Rh2+
47. Rf2 $18) 46... Kxh4 $1 $11 47. e7 (47. Rh8+ Kg5 $11) 47... Kg3 $4 {There's
no reason to bring the K in to close the exits since White's K already has no
exit:} (47... Rhe1+ {Only move.} $11 48. Kd2 Red1+ 49. Ke2 (49. Kc3 $4 Rd3#) 49... Re1+
50. Kf2 Rf1+ 51. Kg2 Rg1+ $11) 48. Rg8+ {Only move.} {White ends the perpetual by
forcing off a pair of Rs with Rh8+ and then promote.} 1-0
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