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Gustavo Barrenechea Bahamonde vs Dmitrij Kollars
"A Fistful of Kollars" (game of the day May-04-2019)
Tradewise Gibraltar (2018), Catalan Bay GIB, rd 1, Jan-23
Center Game: Normal Variation (C22)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Apr-24-19
Premium Chessgames Member
  whiteshark: Alekhine's gun back and forth.
May-04-19
Premium Chessgames Member
  al wazir: 21...Nb2 looks strong.

After 22. Qg4+ Kb8 23. Rb1 Nd3, white is under some pressure.

If now 24. Nf5, then 24...Nxd1 25. Nxe3 Nxe3 26. Qd1 Nxf1 27. Qxf1 Rxd5, with a clear win.

May-04-19
Premium Chessgames Member
  OrangeTulip: Bahamonde has to learn yet the skill of giving up
May-04-19  goodevans: As as I can tell, things started to go wrong for white with <12.d4>. Odd that such a natural looking move should be a problem but it cuts some crucial communication lines (e.g. white's 4th rank) after which the loss of at least a pawn seems inevitable.

I can't see any rhyme or reason why white also gave up the e-pawn with <20.Rad1>. To me this just looks plain bad.

After that black seems to have let white back into the game a bit. al wazir's <21...Nb2> looks to be an improvement.

Maybe white just didn't see the opportunity to win a pawn back with <26.Rxg5 Qxg5 27.Qxe4>. After that white didn't really trouble black too much.

May-04-19
Premium Chessgames Member
  HeMateMe: "A Fistful of Dollars", one of the 'Spaghetti westerns' of Clint Eastwood in the 1960s:

<https://www.imdb.com/title/tt0058461/>

May-04-19
Premium Chessgames Member
  Breunor: The computer doesn't have an issue with 12 d4:

1) -0.28 (21 ply) 12...Qe4 13.Ng3 Qd3 14.Qb3 Na5 15.Qxf7 Rd7 16.Qe6 Re8 17.Qh3 Qxc3 18.Bg5 Qxd4 19.Bxf6 Qxf6 20.Rfe1 Qf7 21.Rad1 Rxe1+ 22.Rxe1 Kb8 23.Qxh7 Nc6 24.a4 Rd2

Best was Nf4, but the difference is only .28:

1) =0.00 (23 ply) 12.Nf4 Qa5 13.Qxa5 Nxa5 14.c4 Nc6 15.Bb2 Rhe8 16.f3 Rd6 17.Rae1 Rxe1 18.Rxe1 Nb4 19.Re3 Nxa2 20.Re7 Rd7 21.Bxf6 gxf6 22.Re8+ Rd8 23.Re7 Nb4 24.Rxf7 Nxd3 25.Nxd3 Rxd3

White starts falling behind gradually, the big problem was 20 Rad1?, as goodevens said, no real reason to give up the e-pawn:

1) -2.59 (22 ply) 20...Qxe3+ 21.Kh1 Nb2 22.Qg4+ Kb8 23.Rb1 Nd3 24.Qf5 Qd4 25.d6 Qxd6 26.Qxg5 Qg6 27.Qb5 b6 28.Qb3 Rd7 29.Rf5 Re5 30.Rbf1 Rxf5 31.Rxf5 Qe6 32.h3 Nc5 33.Qxe6 fxe6 34.Re5 Rd1+ 35.Kh2 Kb7 36.Ne4

Instead, it prefers e4 or even Qxa7:

1) -0.60 (23 ply) 20.e4 Kb8 21.Kh1 Nd6 22.Rf3 Qa6 23.Qxa6 bxa6 24.Rb1+ Kc8 25.Kg1 a5 26.Ra3 Nxe4 27.Rxa5 Nxg3 28.hxg3 Re2 29.g4 Rd6 30.Kf1 Rd2 31.Rxa7 R6xd5 32.Rc1

Trying to figure out why is a little harder - but it looks like the idea is after e4, if black plays 20 Qe3 ch 21 Kh1 Nd6 white is ahead after Rfe1 and then e5! The simple answer of protecting the e pawn here makes sense also!

2) -1.02 (22 ply) 20.Qxa7 Qxe3+ 21.Qxe3 Nxe3 22.Rxf7 Rd7 23.Rxd7 Kxd7 24.Rb1 b6 25.a4 Nxd5 26.a5 Kc6 27.axb6 cxb6 28.Nf5 Kc5 29.Rc1+ Kb4 30.Nd6 Re6 31.Nf7 g4 32.Nd8 Re4 33.Nc6+ Kb3 34.h3 Kb2 35.Rd1 Nc3 36.Rf1

So Rad1 cost about 2 full points.

goodevens is also correct that 21 Nb2 was better than Nd6:

1) -2.54 (23 ply) 21...Nb2 22.Qg4+ Kb8 23.Rb1 Nd3 24.Qf5 Qd4 25.d6 Qxd6 26.Qxg5 Qg6 27.Qb5 b6 28.Rb3 Re5 29.Qc4 Red5 30.Ra3 b5 31.Qh4 Re8 32.Rb3 c6 33.a4 Ree5 34.axb5 cxb5 35.Rbb1

2) -1.92 (22 ply) 21...Nd6 22.Rf3 Qc5 23.Qg4+ Kb8 24.Qxg5 Qc2 25.Rff1 Qxa2 26.Qf4 Qc2 27.Nf5 Qxf5 28.Qxf5 Nxf5 29.Rxf5 f6 30.Kg1 Rd6 31.Rh5 Re7 32.Ra1 b5 33.Rb1 Rb6 34.d6 cxd6 35.Rhxb5 Rxb5

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