click for larger view

Analysis by Houdini 1.5a w32: 27 ply

1. = (0.00): 14...cxd4 15.exd4 Rc8 16.Bf5 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bxd4 Rc7 22.Bxf6 gxf6 23.Qd2 Rxe1 24.Rxe1 Qf8 25.Qf4 Qc5+ 26.Kh1 Re7 27.Qg3+ Kf8 28.Qb8+ Kg7 29.Qg3+ Kf8 30.Qb8+

2. = (0.00): 14...Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bxd4 Rc7 22.Bxf6 gxf6 23.Qd2 Rxe1 24.Rxe1 Qf8 25.Qf4 Qc5+ 26.Kh1 Re7 27.Qg3+ Kf8 28.Qb8+ Kg7 29.Qg3+ Kf8 30.Qb8+

3. = (0.06): 14...a6 15.Bf5 cxd4 16.exd4 dxc4 17.Qxc4 b5 18.Qc2 Qb6 19.Bxf6 Nxf6 20.Qc5 Qa7 21.Qxa7 Rxa7 22.dxe5 Rxe5 23.Bb1 Bd5 24.Nc3 Rxe1 25.Rxe1 Be6 26.Ba2 Bxa2 27.Nxa2 Rd7 28.Kf2 Rd6 29.Nc3

4. = (0.14): 14...exd4 15.exd4 Ba6 16.cxd5 Nxd5 17.Bxd8 Nxc3 18.Bxa6 Nxe2+ 19.Rxe2 Raxd8 20.Rxe8+ Rxe8 21.Bb5 Rd8 22.Bxd7 Rxd7 23.dxc5 bxc5 24.Rc1 Rd5 25.Kf1 f6 26.Ke2 Kf7 27.Rc4 Ke6 28.Ke3 Re5+ 29.Re4 f5

5. = (0.14): 14...Ba6 15.cxd5 exd4 16.exd4 Nxd5 17.Bxd8 Nxc3 18.Bxa6 Nxe2+ 19.Rxe2 Raxd8 20.Rxe8+ Rxe8 21.Bb5 Rd8 22.Bxd7 Rxd7 23.dxc5 bxc5 24.Rc1 Rd5 25.Kf1 f6 26.Ke2 Kf7 27.Rc4 Ke6 28.Ke3 Re5+ 29.Re4 f5

<whiteshark>

<<Tabanus Your <Rucksack-line <no.1>> 13.O-O c5 14.Rae1 Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Ba6 18.Bd3 Ra4 19.Qd1 Bxd3 20.Qxa4 exd4 21.Qd1 Ba6 22.Bxf6 Nxf6 23.Rf2 d3 24.Nc1 Rxe1+ 25.Qxe1 Qc7 26.Rd2 Qc5+ 27.Kh1 Ne4 28.fxe4 dxe4> is really tricky and highly interesting!

The crucial question is whether black is able to push his pawn-chain further forward or not.

It is my impression that the engines (lazily) prefer to repeat the moves at some point of an line and give 0.00 evals. Probably a horizon effect thingy in addition with the unusual material imbalance. So you have to drive them forward manually. Well, here we go: <29.Rd1 f5 30.Qd2 Qe5 31.Re1 Qd5>

Hiarcs 13 wants to repeat moves with 32.Rd1 Qe5, although I have reduced the draw value to -2.

Zappa Mexico however went on with 32... Bb7 and a -0.74 eval at 21 ply.

With an early Ba6, Black can force an even endgame, as <imag> suggested.

13... c5 14. Rae1 <Ba6> 15.cxd5 exd4 16.exd4 Nxd5 17.Bxd8 Nxc3 18.Bxa6 Nxe2 19.Rxe2 Raxd8 20.Rxe8 Rxe8

click for larger view

21.Bb5 Rd8 22.Bxd7 Rxd7 23.dxc5 bxc5 (imag)

click for larger view

21.Rd1 Nb8 22.Bb7 Rd8 23.d5

click for larger view

<cro777>

A diferred Ba6 (at move 17)

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b6 7.Bg5 Bb7 8.f3 h6 9.Bh4 d5 10.e3 Re8 11.Bd3 Nbd7 12.Ne2 e5 13.O-O c5 14.Rae1 Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 <Ba6>

GM Akobian would probably reply to by playing <18.Bd3> followed by <19.Bxa6>

18. Bd3 Ra4 19. Bxa6 Rxa6 20. dxe5 Nxe5 21. Nd4 b5

Analysis by Deep Rybka 4.1 x64: d=27

1. = (0.17): 22.Bg3 Nc4 23.Qc1 Rf8 24.Bf2 Qd7 25.Re2 Re8 26.Rfe1 Rxe2 27.Rxe2 Qb7 28.Qc3 Nd6 29.Qb4 Qd7 30.Qc5 Rb6 31.b3 Nf5 32.Nxf5 Qxf5 33.h4 Ra6

<whiteshark: <<Tabanus Your <Rucksack-line <no.1>> 13.O-O c5 14.Rae1 Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Ba6 18.Bd3 Ra4 19.Qd1 Bxd3 20.Qxa4 exd4 21.Qd1 Ba6 22.Bxf6 Nxf6 23.Rf2 d3 24.Nc1 Rxe1+ 25.Qxe1 Qc7 26.Rd2 Qc5+ 27.Kh1 Ne4 28.fxe4 dxe4> is really tricky and highly interesting!>

Analysis by Rybka 3 32-bit : 20 ply

1. = (0.00): 29.Rd1 f5 30.b4 Qc2 31.Qd2 Qa4 32.Rf1 e3 33.Qa2+ Kh7 34.Qe6 d2 35.Qxf5+ Kh8 36.Qf8+ Kh7 37.Qf5+ Kh8 38.Qf8+ Kh7 39.Qf5+ Kh8 40.Qf8+ Kh7 41.Qf5+ Kh8 42.Qf8+ Kh7 43.Qf5+ Kh8 44.Qf8+

2. = (0.00): 29.Qg1 Qg5 30.Qe1 Qc5 31.Rd1 f5 32.b4 Qc2 33.Qd2 Qa4 34.Rf1 e3 35.Qa2+ Kh7 36.Qe6 d2 37.Qxf5+ Kh8 38.Qf8+ Kh7 39.Qf5+ Kh8 40.Qf8+ Kh7 41.Qf5+ Kh8 42.Qf8+ Kh7 43.Qf5+ Kh8 44.Qf8+

click for larger view

Analysis by Stockfish 2.0.1 JA 64bit (33-ply):

1. = (0.00): 14...cxd4 15.exd4 Rc8 16.Bf5 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bxd4 Rxe1 22.Rxe1 Bc8 23.Bc2 Rc6 24.Qd3 Be6 25.b4 Qc8 26.Re2 Qd8 27.Qd2 Nh5 28.Qd3 Nf6

2. = (0.00): 14...Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bxd4 Rxe1 22.Rxe1 Bc8 23.Bc2 Rc6 24.Qd3 Be6 25.b4 Qc8 26.Re2 Qd8 27.Qd2 Qc8 28.Qd3

3. = (0.20): 14...exd4 15.exd4 Ba6 16.cxd5 Nxd5 17.Bxd8 Nxc3 18.Bxa6 Nxe2+ 19.Rxe2 Raxd8 20.Rxe8+ Rxe8 21.Bb5 Rd8 22.Bxd7 Rxd7 23.dxc5 bxc5 24.Rc1 Rd5 25.Kf1 Kf8 26.Ke2 Ke7 27.Rc4 Kd6 28.Ra4 Re5+ 29.Kd3 Re7 30.h3

4. = (0.20): 14...Ba6 15.cxd5 exd4 16.exd4 Nxd5 17.Bxd8 Nxc3 18.Bxa6 Nxe2+ 19.Rxe2 Raxd8 20.Rxe8+ Rxe8 21.Bb5 Rd8 22.Bxd7 Rxd7 23.dxc5 bxc5 24.Rc1 Rd5 25.Kf1 Kf8 26.Ke2 Ke7 27.Rc4 Kd6 28.Ra4 Re5+ 29.Kd3 Re7 30.h3

5. ² (0.32): 14...a6 15.dxc5 Nxc5 16.Rd1 g5 17.Bg3 Qe7 18.Bf5 Bc6 19.cxd5 Nxd5 20.Qc1 Qf6 21.Bc2 Rac8 22.Rfe1 Ne6 23.b4 h5 24.e4 Ndf4 25.Qb2 Red8 26.Rxd8+ Rxd8 27.Nxf4 Nxf4 28.Qc3 Rd6 29.Bb3 g4 30.fxg4

6. ² (0.48): 14...a5 15.cxd5 Nxd5 16.Bxd8 Nxc3 17.bxc3 Raxd8 18.Kf2 cxd4 19.cxd4 exd4 20.Nxd4 Nc5 21.Bb5 Re5 22.Rb1 Red5 23.Rfd1 R5d6 24.h4 g6 25.Ke2 Kg7 26.h5 Bd5 27.Rb2 Kf6 28.Rbd2 Bb7 29.hxg6 fxg6

7. ² (0.52): 14...Rb8 15.Bg3 exd4 16.exd4 Rc8 17.Nf4 cxd4 18.Qxd4 dxc4 19.Rxe8+ Nxe8 20.Bxc4 Ne5 21.Qxd8 Rxd8 22.Ba2 Nf6 23.Re1 Nc6 24.Ng6 Rd2 25.Ne5 Nxe5 26.Bxe5 Nd5 27.Re4 g5 28.Rd4 Rxd4 29.Bxd4 Kf8 30.Kf2

<1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 d5 10. e3 Re8 11. Bd3 Nbd7 12. Ne2 e5 13. O-O>

<13...c5 14. Rae1 a5 15.cxd5 Nxd5 16. Bxd8 Nxc3 17. bxc3 Raxd8 18. Kf2 *>

click for larger view

hiarcs13.2mp - multiPV[1] - selectivity[3] - playingstyle[solid] - optimistic search[off]

Depth = 27/1

Rybka 4.1 d=27 (from cro777)

(0.17) 22.Bg3 Nc4 23.Qc1 Rf8 24.Bf2 Qd7 25.Re2 Re8 26.Rfe1

(0.09) 22.Re3 Ng6 23.Rxe8+ Qxe8 24.Bf2 Ra4 25.Ra1 Rc4 26.b3

For testing:

<13...c5 14.Rae1 Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2>

click for larger view

hiarcs13.2mp - multiPV[1] - selectivity[7]

Depth = 27/1

<13...c5 14.Rae1 Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Ba6 18.Bd3 Ra4 19.Bxa6 Rxa6>

click for larger view

hiarcs13.2mp - multiPV[1] - selectivity[4] - playing style[solid]

Depth = 26:1/34

<imag: Let's go through <RV>'s top line (or Galanov-Pessoa game) and look at alternatives. <14...Rc8 15.Bf5 cxd4>

(15...Rc6 16.cxd5 cxd4 <<17.dxc6 advantage White, needs further analysis)>>>

After the Queen sac <17.dxc6>, each move sandpapered at minimum depth of 27, Houdini got this:

17...dxc3
18.cxd7 Rf8
19.Nxc3 g5
20.Bg3 Qe7
21.Rd1 Bc6
22.f4

click for larger view

Analysis by Houdini 1.5a w32 <depth 29>:

<1. = (0.00): 22...Rd8 >23.fxe5 Nh5 24.e6 Nxg3 25.exf7+ Kxf7 26.hxg3 Kg7 27.Rf2 Bxd7 28.Rfd2 Bxf5 29.Rxd8 Qxe3+ 30.Kh2 h5 31.Ra8 h4 32.gxh4 gxh4 33.Rxa7+ Kg6 34.Rd6+ Be6 35.Rc6 Qg3+ 36.Kh1 Qe1+ 37.Kh2 Qg3+ 38.Kh1

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 d5 10. e3 Re8 11. Bd3 Nbd7 12. Ne2 e5 13. O-O c5 14. Rae1 Qc7 15. cxd5 Nxd5 16. Qd2 exd4 17. exd4 c4 18. Bg3 Qc6 19. Be4 N7f6 *

click for larger view

White has the two bishops, but has the isolated Queens pawn. Black has a well placed knight at d4 which is well supported. Black has 3 pawns versus 2 on the Queenside which could be a plus in the endgame.

Engine analysis:

hiarcs 13.2mp - multiPV[1] - selectivity[7]

depth = 24/1

click for larger view

Analysis by Stockfish 2.0.1 JA 64bit (31-ply):

1. = (0.00): 15.dxe5 Nxe5 16.Bxf6 Qxf6 17.cxd5 Bxd5 18.Ba6 Rcd8 19.Rd1 Bc6 20.Ng3 Ba4 21.Rxd8 Rxd8 22.e4 Nd3 23.Qxf6 gxf6 24.Bxd3 Rxd3 25.Nf5 Kh7 26.Rf2 Bd7 27.Rc2 Rd1+ 28.Kf2 Ba4 29.Re2 Bb5 30.Rc2 Ba4

2. = (0.00): 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bxd4 Rc7 22.Bxf6 gxf6 23.Qd2 Rxe1 24.Rxe1 Qf8 25.Bd3 Qc5+ 26.Kf1 Kg7 27.Qf4 Re7 28.Rxe7 Qxe7 29.Qg3+ Kf8 30.Qb8+ Kg7

3. ³ (-0.36): 15.Bb1 cxd4 16.exd4 Ba6 17.Bf5 Rxc4 18.Qd2 Nc5 19.Bf2 Nb3 20.Qd1 Nxd4 21.Nxd4 Rxd4 22.Bxd4 Bxf1 23.Rxe5 Bb5 24.Qe1 Qd6 25.Qe3 Qc7 26.h4 Qd6 27.g4 Rxe5 28.Qxe5 Qxe5 29.Bxe5 Nd7 30.Bxd7 Bxd7

click for larger view

Analysis by Stockfish 2.0.1 JA 64bit (28-ply):

1. = (-0.12): 18.Ba6 Rcd8 19.Ng3 Bc6 20.Rc1 h5 21.Nxh5 Qg5 22.Ng3 Nd3 23.f4 Qg6 24.Rcd1 Rxe3 25.Qd2 Qe6 26.Bc4 Qe8 27.Qc2 Ne1 28.Rxd8 Nxc2 29.Rxe8+ Rxe8 30.Nf5 Ne3 31.Nxe3 Rxe3 32.Rd1 Kf8 33.Rd6 Re1+

2. = (-0.24): 18.Rd1 Bc6 19.Bc2 Rcd8 20.Ng3 g6 21.Rxd8 Rxd8 22.Rd1 Rxd1+ 23.Bxd1 Kg7 24.f4 Nd7 25.Kf2 Qxc3 26.bxc3 Kf6 27.e4 Ke7 28.e5 f6 29.Bf3 Bxf3

3. ³ (-0.36): 18.Bb1 Bc6 19.Ng3 Bb5 20.Rf2 Rcd8 21.e4 Qg6 22.Nf5 Nd3 23.Bxd3 Rxd3 24.Qc1 Qg5 25.Ne3 Bc6 26.b4 Ba4 27.Nd5 Qxc1 28.Rxc1 c4 29.Rb2 Bb3 30.Kf2 b5 31.Nc3 a6

4. ³ (-0.40): 18.e4 Bb7 19.Bb1 Ba6 20.f4 Nd3 21.e5 Qg6 22.f5 Qg5 23.Bxd3 Qe3+ 24.Rf2 Qxd3 25.g4 Qxc3 26.Nxc3 Rcd8 27.h3 Rd3 28.Kh2 Bc4 29.Re4 Rd4 30.Re1 Kf8 31.Kg2 Rd3 32.Rf3 Bd5 33.Nxd5

5. ³ (-0.44): 18.Bc2 b5 19.Nf4 Bc6 20.Nh5 Qh4 21.Ng3 Qc4 22.Qd2 g6 23.Qf2 b4 24.axb4 cxb4 25.Ne4 Bxe4 26.Bxe4 Nd3 27.Bxd3 Qxd3 28.Qe2 Qc2 29.e4 Red8 30.Rf2 Qc5

click for larger view

Analysis by Stockfish 2.0.1 JA 64bit (30-ply):

1. = (0.00): 15...cxd4 16.exd4 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bxd4 Rc7 22.Qa4 Rc4 23.Qd1

2. = (0.00): 15...Rc6 16.Bxd7 cxd4 17.Bxc6 dxc3 18.Bxb7 Qc7 19.Nxc3 Qxb7 20.Bxf6 gxf6 21.cxd5 Rc8 22.Rc1 f5 23.e4 fxe4 24.fxe4 b5 25.h4 b4 26.axb4 Qxb4 27.Rc2 Qd4+ 28.Kh2 Rb8 29.Rf6 Kg7

3. ² (0.68): 15...g5 16.dxe5 Rxe5 17.Bxd7 Nxd7 18.Bg3 Re6 19.cxd5 Bxd5 20.e4 Bc6 21.Rd1 Qf6 22.Rd2 Qxc3 23.Nxc3 Kg7 24.Nd1 Bb5 25.Re1 Kg6 26.Nc3 Bc6 27.b3 Nf6 28.Red1 Nh5 29.Be1 Nf4 30.g3 Nh3+ 31.Kg2

click for larger view

1. [0.00], d=24: 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Rxe8+ Nxe8 22.Bxd4 Nd6 23.Bb1 <Rc8> 24.Qa4 Rc4 25.Qd1 Apparently Critter can't find anything better than this apparent draw by repetition. But Black is a passed pawn up with more actively placed pieces and should be trying to stir up some trouble for White. The White qeen/bishop battery along the b1-h7 diagonal can be covered by g7-g6.

click for larger view

<23...Rc8> I don't see why this retreat is necessary at this time. The active 23...Qh5 to force White's bishop to move from d4 and allow Black's passed pawn to start moving should be considered.

2. [-0.12], d=24: 15.dxe5 Nxe5 16.<Bxf6> Qxf6 17.cxd5 Bxd5 18.Ba6 Rcd8 19.e4 Bc6 20.Rd1 <c4> 21.Ng3 b5 22.a4 bxa4 23.Bxc4 Nxc4 24.Qxc4 Bd7 25.Kh1 <a6> 26.Qa2 Bb5 27.Rfe1 g6 28.Qa3

click for larger view

Black seems slightly better in spite of his doubled a-pawns since his bishop has more scope than White's knight.

<16.Bf6> And here 16.Bf5 pushing the rook back to a8 and gaining 2 tempos seems better. That's why 14...cxd4 15.exd4 Rc8 is probably better since then 16.Bf5 is answered by 16...Rxc4.

<20...c4> This weakening of the c-pawn and the d4 square seems unnecessary at this time. The simple 20...Qe6 with the idea of 21...Ba4 taking over the d-file seems simpler.

<25..a6> And 25...Qxb2 creating an advanced passed pawn looks attractive.

Remaining 3 lines without pictures or commentary:

3. [-0.19], d=24: 15.Bc2 cxd4 16.exd4 Ba6 17.Qd2 Bxc4 18.Bf5 Ra8 19.Rf2 Qc7 20.Rc1 Qd6 21.Bg3 Kh8 22.dxe5 Nxe5 23.Bb1 Rac8 24.Nd4 Ba6 25.Nf5 Rxc1+ 26.Qxc1 Qd7

4. [-0.16], d=23: 15.Bb1 cxd4 16.exd4 Ba6 17.Qd2 Bxc4 18.Bf5 Ra8 19.b3 Ba6 20.Bxd7 Qxd7 21.Bxf6 gxf6 22.Qxh6 Qf5 23.dxe5 fxe5 24.Rf2 Rac8 25.Qd2 Bb7 26.Ng3 Qf6 27.Rfe2 Re6 28.Qd3

click for larger view

1. [0.00], d=27: 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bd3 Rc8 22.Bb5 Bc6 23.Ba6 <Rc7> 24.Qxd4 Rxe1 25.Rxe1 Re7 26.Rc1 Bb7

click for larger view

Houdini must think that after, say, 27.Bb5 that White's 2 bishops fully compensate for the pawn minus.

<23...Rc7> After this maneuver (22...Bc6, 23...Rc7) Black's pieces are not as well placed as they would have been after the simple 22...Rxe8 although Black must be on guard against Re1-e8+. But Black corrects the situation.

2. [-0.08], d=26: 15.Bc2 cxd4 16.exd4 Ba6 17.Qd2 <Bxc4> 18.Bf5 <Ra8> 19.b3 Ba6 20.Rf2 Qb8 21.Bg3 Qd6 22.a4 Rad8 23.h3 <Qa3> 24.dxe5 Nxe5 25.Nd4 Ned7 26.Rd1 Rc8 27.Bh2

click for larger view

Black is a pawn up but White still has the 2 bishops, his pieces are better placed, and has a great outpost for his knight on d4. Maybe Black should try to exchange queens by 27...Qc5-c3.

<17...Bxc4> An odd sequence. Why not just 16...Rxc4 and then, if desired, 17...Ba6. Black's bishop winds up in a6 anyway.

<18...Ra8> Again, 18...e5 should be considered.

<23...Qa3> Decentralizing the queen doesn't look right, but the pin on the Pe5 was a nuisance.

3. [-0.09], d=26: 15.Bb1 exd4 16.exd4 Ba6 17.<Bf5> cxd4 18.Nxd4 Rxc4 19.Qd2 Rxd4 20.Qxd4 Bxf1 21.Rxf1 Nf8 22.Bxf6 Qxf6 23.Qxf6 gxf6 24.<Kf2> Ne6 25.Rd1 Rd8 26.Re1 Nd4 27.Bd3 Rd7 28.a4

click for larger view

White's last move was an innacuracy; 28.Re8+ prevents Black's king and rook from cooperating. Black is now clearly better even though his pawn structure is a mess.

<17...Bf5> 15.Bb1, 17.Bf5 clearly represents a loss of a tempo. Strange that Black can't take better advantage of it.

<24.Kf2> And this loses another critical tempo. 24.Rd1 immediately is better.

Remaining 2 lines without pictures or commentary:

4. [-0.10], d=26: 15.dxe5 Nxe5 16.Bxf6 Qxf6 17.cxd5 Bxd5 18.Ba6 Rcd8 19.e4 Bc6 20.f4 Nd3 21.Qxf6 gxf6 22.Bxd3 Rxd3 23.Ng3 Kf8 24.Rf3 Rd2 25.Rf2 Red8 26.h4 R2d4 27.Kh2 a6

click for larger view

Analysis by Stockfish 2.0.1 JA 64bit (31-ply):

1. = (0.00): 16...Rxc4 17.Qd2 Nc5 18.Bf2 Nb3 19.Qd1 Nxd4 20.Nxd4 exd4 21.Bxd4 Rxe1 22.Rxe1 Bc8 23.Bc2 Be6 24.Qd2 Nh5 25.b3 Rc8 26.Qd3 g6 27.Bb1 Qh4 28.Qd2 Nf4 29.Bf2 Qf6 30.Bd4 Qh4

2. = (0.00): 16...Rc6 17.Qc2 Rxc4 18.Qd2 Nc5 19.Bf2 Nb3 20.Qd1 Nxd4 21.Nxd4 exd4 22.Bxd4 Rxe1 23.Rxe1 Bc8 24.Bc2 Be6 25.Qd2 Nh5 26.b3 Rc8 27.Qd3 g6 28.Bb1 Qh4 29.Qd2 Nf4 30.Bf2 Qf6 31.Bd4 Qh4

3. ² (0.36): 16...g5 17.Bf2 Ba6 18.h4 Bxc4 19.Qd2 Nh7 20.hxg5 Nxg5 21.Bh4 exd4 22.Nxd4 Bxf1 23.Rxe8+ Qxe8 24.Bxg5 hxg5 25.Qxg5+ Kf8 26.Qh6+ Ke7 27.Kxf1 Rc4 28.Nc6+ Rxc6 29.Qxc6 Nc5 30.Qxe8+ Kxe8 31.Ke2 Ke7 32.Ke3

<After 14...Rc8 15.Bf5 cxd4 16.exd4 Rxc4 17.Qd2>

click for larger view

Houdini_15a_x64:

    1) d=32 +0.04 17. ... Ba6 18.Bd3 Ra4 19.Bxa6 Rxa6 20.dxe5 Nxe5 21.Nd4 b5 22.Re2 Ng6 23.Rxe8+ Qxe8 24.Bf2 Qd7 25.Rd1 Ne5 26.Re1 Ng6

    2) d=32 +0.07 17. ... Nc5 18.Bb1 Nb3 19.Qd3 Nc5 20.Qd1 Ncd7 21.Bd3 Rc7 22.Nc3 a6 23.Bf5 exd4 24.Ne2 d3 25.Nd4 Ne5 26.Bxd3 Nxd3

    1) d=31 +0.04 17. ... Nc5 18.Bb1 Nb3 19.Qd3 Nc5 20.Qd1 Ncd7 21.Bd3 Rc7 22.Nc3 a6 23.Bf5 exd4 24.Qxd4 Rc4 25.Qf2 b5 26.Rxe8+ Qxe8

    2) d=31 +0.08 17. ... Ba6 18.Bd3 Ra4 19.Qd1 Ra5 20.Bxa6 Rxa6 21.a4 e4 22.Nc3 b5 23.axb5 Rae6 24.fxe4 dxe4 25.d5 Re5 26.Qd4 Qb6

    1) d=30 +0.00 17. ... Nc5 18.Bb1 Nb3 19.Qd3 Nc5 20.Qd2 Nb3

    2) d=30 +0.09 17. ... Ba6 18.Bd3 Ra4 19.Qd1 Ra5 20.Bxa6 Rxa6 21.a4 e4 22.Nc3 exf3 23.Qxf3 Rxe1 24.Rxe1 Qa8 25.h3 b5 26.axb5 Re6

As the ply gets deeper it decides that 17...Ba6 is better and it looks like we may be able to keep the extra pawn in either line.

<17...Ba6 18.Bd3 Ra4 19.Bxa6 Rxa6 20.dxe5 Nxe5 21.Nd4 b5>

click for larger view

hiarcs13.2mp - mulitPV[5] - selectivity[4] - playing style[active]

Depth = 27:1/42

0.00 22. Qb4 Ra4 23. Qd2 Qb6 24. Bf2 Qb7 25. Re3 Nc4 26. Rxe8 Nxe8 27. Qe2 Ncd6 28. Rd1 Nf6 29. Bh4 Nfe8 30. Bf2

0.00 22. b3 Ng6 23. Bxf6 Rxf6 24. Nxb5 Rxe1 25. Rxe1 Qb6 26. Nd4 Nf4 27. Qe3 Ne6 28. Nxe6 fxe6 29. Qxb6 axb6 30. Re2 g5 31. Rc2 e5 32. Rc7 Kf8 33. Rd7 e4 34. Rxd5 exf3

0.00 22. Re2 Ng6 23. Bf2 Qd7 24. Rxe8 Nxe8 25. Rc1 Rb6 26. Ne2 Rd6 27. Nd4 a6 28. Bg3 Rb6 29. Qc3 Nf8 30. Qc8 Rb7 31. Qa8 Ra7 32. Qb8 Rb7 33. Qa8

0.00 22. Bf2 Qd7 23. Re2 Nc4 24. Rxe8 Nxe8 25. Qb4 Nc7 26. Re1 Ra4 27. Qc3 Ra6 28. Qb4

0.00 22. Qc3 Qd7 23. Re2 Ng6 24. Rxe8 Nxe8 25. Bg3 Rb6 26. Rc1 Ne7 27. b3 a6 28. Re1 Rb7 29. Qc5 Kh7 30. Rc1 Ng6 31. Qc3 Ra7

I do no not mind necessarily White having several decent responses as long as they are all truly 0.0. He will need to sort them out the same as us with less resources. :)

However, we will need to check all the possible white responses to ensure nothing unsuspected is lurking...for my own part I am analyzing 22.Bg3.