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Leonardo Tristan vs Elshan Moradiabadi
"Tristan the Knight Away" (game of the day Jul-15-2019)
American Continental (2018), Montevideo URU, rd 6, Jun-05
Queen Pawn Game: Sarratt Attack (D00)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Jul-12-19
Premium Chessgames Member
  OhioChessFan: "Tristan the Knight Away"
Jul-15-19  Cheapo by the Dozen: The endgame piece sacrifice is pretty cool.
Jul-15-19  Jamboree: Don't understand why black didn't play 46. ... Bxb5 47. Rxb5 Rxa6. Even without the pawns it's really tough for white to win with R+N v R. But WITH the extra pawn, black has much more of a chance of drawing than the game line, which from that moment on is lost for black. I guess he just didn't see 47. Nd7.
Jul-15-19  7he5haman: Does 30...Ree2 fare any better?
Jul-15-19  7he5haman: E.g. 30...Ree2:

1) 31.Rxc8 Rxf2 32.Re8+ Ke6 (this move might be bad for Black - I can't calculate it right now - but Kg6 looks even worse after Ne7+)

2) 31.Rf1 Bb7 32.Re8+ Kg6 and Black has activity

Jul-15-19  goodevans: 30...Ree2 31.Rxc8 Rxf2 32.Kh1 Rxg2 33.Rf8+ Ke6 <33...Kg6 34.Rg1> 34.Nd4+ and black no longer has a threat of perpetual.
Jul-15-19  goodevans: <7he5haman: E.g. 30...Ree2: 1) 31.Rxc8 Rxf2 32.Re8+ Ke6 (this move might be bad for Black - I can't calculate it right now>

32...Ke6 is bad because of 33.Nd4+(!)

<... - but Kg6 looks even worse after Ne7+)>

32...Kg6 33.Ne7+ is pretty complicated but black survives: <32...Kg6 33.Ne7+ 34.Nxf5+ Kh5 35.Nxg7+ Kg6>


click for larger view

White must now give back the piece to avoid perpetual, which is why it's better to delay Rf8+ until after <32.Kh1 Rxg2> (my previous post).

Jul-15-19  goodevans: Oops!

The bracket just before the diagram should read <32...Kg6 33.Ne7+ Kh6 34.Nxf5+ Kh5 35.Nxg7+ Kg6>.

Jul-15-19  saturn2: Playing over the game I would have prefered
12...a5
19...Nf6

I think already after 25 Nd4 black was strategically lost (good knight vs bad bishop, rooks on open c and e file)

Jul-15-19  TheaN: <Jamboree: Don't understand why black didn't play 46. ... Bxb5 47. Rxb5 Rxa6. Even without the pawns it's really tough for white to win with R+N v R. But WITH the extra pawn, black has much more of a chance of drawing than the game line, which from that moment on is lost for black. I guess he just didn't see 47. Nd7.>

Your last point is probably the cause. However, you do seem to overestimate the value of of pawn <majority> compared to a <sole> pawn when it comes to being a piece down: R+N+P vs R+2P is a huge difference compared to R+N vs R+P: to get that out of the way, R+N vs R <is> drawn; it's not just difficult to win.

After <46....Bxb5 47.Rxb5 Rxa6 ±> Black has a few annoyances that aren't easy to cope with:

1) The Black king has no easy approach.

2) The White king is near his pawn and in position to stop the Black pawns.

3) The knight's free roaming due to the rook's correct placement.

4) Due to the pawn configuration I'm certain a rook trade is won for White, unless the knight has to desperado almost instantly afterwards.

I'd say in practice, this ending is more often won for White than drawn, and hardly ever lost (ie Nxh and the draw is there).

Jul-15-19
Premium Chessgames Member
  perfidious: Far as the pun: pas mal, and far better than a great many which pass through these parts.
Jul-15-19  kontrippo: It's a very interesting and also a long game. If you want, you can watch my version with a classical music at the back: https://www.youtube.com/watch?v=UN6...
Jul-15-19
Premium Chessgames Member
  Sargon: <OhioChessFan: "Tristan the Knight Away”>

I, Sargon—<Punmaster General>—hereby promote <OhioChessFan> from <Private First Sass> to the rank of <Punnery Sergeant> for going above and beyond the call of duty in the <Army of Pun>. His punselfish irk serves as an example for all others to fall low...

Jul-15-19
Premium Chessgames Member
  Gilmoy: I sargond this motion.
Jul-15-19  Captain Hindsight: Wielded by anyone but a true master, a pun is the lowest form of humor.

However, wielded by a master, a pun is the highest, purest form of humor possible by humans.

Jul-15-19
Premium Chessgames Member
  OhioChessFan: <I, Sargon—<Punmaster General>—hereby promote <OhioChessFan> from <Private First Sass> to the rank of <Punnery Sergeant>>

Speaking of puns and Sergeants, cough, cough.

Jul-15-19
Premium Chessgames Member
  Breunor: On 30 Ree2:

1) +1.26 (28 ply) 31.Rxc8 Rxf2 32.Kh1 g6 33.Rf8+ Kg7 34.Rd8 Rxg2 35.Rxd2 Rxd2 36.Rc4 Ra2 37.Rxf4 Rxa3 38.Kg2 Kh6 39.Ne5 Re3 40.Nc4 Re6 41.Rd4 g5 42.hxg5+ Kxg5 43.Kf2 h5 44.Nd2 Kh6 45.Rh4 Kg6 46.Nf3 Rf6 47.Kg3

The text mvoe Bd7 keeps the game even:

1) +0.08 (28 ply) 31.Rxe8 Bxe8 32.a4 Ra2 33.Rd1 Bxc6 34.Rd6+ Ke5 35.Rxc6 Rxa4 36.Rxb6 Ra1+ 37.Kh2 Rb1 38.Rb7 g6 39.Rxh7 Rxb4 40.f3 Kf6 41.Ra7 Ke6 42.Ra6+ Kf7 43.Rd6 Rc4 44.Rb6 Kg7 45.Rb7+ Kf6 46.Ra7 Rc3 47.Ra6+ Kg7 48.Rb6 Kf7

Saturn 2, move 12 the computer has:

1) +0.10 (20 ply) 12...h6 13.b4 Qd6 14.Ne2 e5 15.Nxe5 Nxe5 16.fxe5 Qxe5 17.Nc3 Qc7 18.Bf1 Be6 19.Nb5 Qb6 20.Qe3 Qxe3 21.Rxe3 a5 22.c3 Bd7 23.Nd4 Rfc8 24.Rae1

2) +0.28 (20 ply) 12...Rfd8 13.b4 Qb6 14.Na4 Qc7 15.Nc5 Rac8 16.Rac1 h6 17.c3 b6 18.Nxd7 Qxd7 19.Qe3 Ng4 20.Qe2 Nf6 21.Ne5 Qc7 22.Qe3 Nxe5 23.fxe5

For move 19 it has:

1) =0.00 (23 ply) 19...f6 20.Rac1 Nxf2 21.Qxf2 fxe5 22.Rxe5 dxc4 23.Bxc4 Qxe5 24.fxe5 Rxf2 25.Kxf2 Ng6 26.Be2 Bb7 27.Rc7 Rf8+ 28.Bf3 Bxf3 29.gxf3 Nxe5 30.Nd4 Rf7 31.Rc8+ Rf8 32.Rc7

2) +0.07 (23 ply) 19...dxc4 20.Bxe4 cxb3 21.Qxb3 Bb7 22.Rac1 Qb8 23.b5 Rd4 24.Bf3 Bxf3 25.Qxf3 Qd6 26.Nc6 Nxc6 27.bxc6 Qc7 28.f5 Rf4 29.Qg3 exf5 30.Re7 Qxe7 31.Qxf4 b5 32.Qxf5

On move 45 for black, it has Bxb5 as effectively tied for the best mvoe, but black is in trouble anyway:

1) +1.61 (27 ply) 46...h5 47.Nd5 Bxb5 48.Rxb5 Rxa6 49.Nf4 Kh6 50.Nh3 Ra3 51.Kg2 Ra6 52.f3 Ra4 53.Ng5 Ra6 54.Kg3 Ra7 55.Rc5 Ra6 56.Kf4 Ra4+ 57.Ne4 Ra6 58.Rb5 Ra4 59.Kg3 Ra6 60.Rb7

2) +1.67 (26 ply) 46...Bxb5 47.Rxb5 Rxa6 48.Kg3 h6 49.Nc4 h5 50.Nd2 Ra4 51.f3 Kh6 52.Ne4 Ra6 53.Ng5 Ra7 54.Rc5 Ra6 55.Kf4 Ra4+ 56.Ne4 Ra6 57.Rb5 Ra4 58.Rb6 Ra5 59.Rc6 Ra4 60.Kg3 Ra3 61.Rc5

Jul-16-19  saturn2: <Breunor> Thx for the analysis
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