Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)

[Graham Banks]

GAME 10

Stockfish was also happy to keep material equal, but varied its approach to the middlegame with the more active 9.....Bc5.
Although it looked to the human eye that black might be slightly better, by move 23, it looked even.
Then a quick flurry of exchanges led to a rook and knight ending with the same symmetrical pawn arrangements, and once the knights came off as well, the rook and pawns ending was dead drawn.

[pgn][Event "SF v Komodo Dragon 16CPU"]
[Site "ChessGUI17"]
[Date "2022.06.10"]
[Round "5.2"]
[White "Dragon 3 by Komodo 64-bit 16CPU"]
[Black "Stockfish 15 64-bit 16CPU"]
[Result "1/2-1/2"]
[Time "5:02:01 am"]
[ECO "D32"]
[Opening "Marshall Gambit, Tarrasch"]
[TimeControl "7200+30"]
[PlyCount "122"]
[Number "10"]
[Termination "GUI adjudication"]
[BlackType "program"]
[WhiteType "program"]
[Variant "normal"]

{ AMD Ryzen 9 5950X 16-Core Processor 3.40 GHz }
1.d4 {[%eval 0,1] [%emt 00:00:00]} d5 {[%eval 0,1] [%emt 00:00:00]}
2.c4 {[%eval 0,1] [%emt 00:00:00]} e6 {[%eval 0,1] [%emt 00:00:00]}
3.Nc3 {[%eval 0,1] [%emt 00:00:00]} c5 {[%eval 0,1] [%emt 00:00:00]}
4.cxd5 {[%eval 0,1] [%emt 00:00:00]} exd5 {[%eval 0,1] [%emt 00:00:00]}
5.e4 {[%eval 0,1] [%emt 00:00:00]} dxe4 {[%eval 0,57] [%emt 00:03:48]}
6.Bb5 {(Bb5) [%eval 0,38] [%emt 00:02:28]} Bd7 {(Bd7) [%eval 0,52] [%emt 00:02:14]}
7.Nge2 {(Nge2) [%eval 0,46] [%emt 00:03:16]} Nf6 {(Nf6) [%eval 0,206] [%emt 00:05:12]}
8.O-O {(O-O) [%eval 0,47] [%emt 00:02:36]} cxd4 {(cxd4) [%eval 0,55] [%emt 00:01:57]}
9.Nxd4 {(Nxd4) [%eval 0,49] [%emt 00:03:10]} Bc5 {(Be7) [%eval 0,61] [%emt 00:02:10]}
10.Bg5 {(Bg5) [%eval 0,42] [%emt 00:02:33]} O-O {(O-O) [%eval 0,61] [%emt 00:02:18]}
11.Bxd7 {(Bxd7) [%eval 3,50] [%emt 00:03:49]} Nbxd7 {(Nbxd7) [%eval 0,59] [%emt 00:02:32]}
12.Nxe4 {(Nxe4) [%eval 0,50] [%emt 00:03:38]} Qb6 {(Qb6) [%eval 0,59] [%emt 00:02:16]}
13.Nxc5 {(Nxc5) [%eval 2,52] [%emt 00:05:21]} Nxc5 {(Nxc5) [%eval 0,63] [%emt 00:02:09]}
14.Qc2 {(Qc2) [%eval 0,55] [%emt 00:05:22]} Nce4 {(Nce4) [%eval 0,62] [%emt 00:03:30]}
15.Be3 {(Be3) [%eval 0,55] [%emt 00:01:45]} Rfe8 {(Rfe8) [%eval 0,66] [%emt 00:04:26]}
16.Nf3 {(Nf3) [%eval 0,54] [%emt 00:01:59]} Qa5 {(Qa5) [%eval 0,61] [%emt 00:09:53]}
17.Bd4 {(Rfe1) [%eval 0,52] [%emt 00:02:12]} Rad8 {(Rad8) [%eval 0,54] [%emt 00:02:29]}
18.Qc4 {(h4) [%eval 0,55] [%emt 00:02:11]} h6 {(Rc8) [%eval 0,58] [%emt 00:03:03]}
19.Rfe1 {(h3) [%eval 0,50] [%emt 00:02:34]} Rd7 {(Ng5) [%eval 0,57] [%emt 00:04:35]}
20.a3 {(a3) [%eval 0,53] [%emt 00:02:01]} Rde7 {(a6) [%eval 0,58] [%emt 00:04:10]}
21.Qd3 {(Bxf6) [%eval 0,52] [%emt 00:01:46]} a6 {(a6) [%eval 0,61] [%emt 00:01:21]}
22.Rad1 {(Rad1) [%eval 0,55] [%emt 00:01:54]} Qf5 {(Qf5) [%eval 0,56] [%emt 00:05:56]}
23.Nh4 {(g3) [%eval 0,58] [%emt 00:02:44]} Qd5 {(Qh5) [%eval 0,62] [%emt 00:01:50]}
24.Bxf6 {(Bxf6) [%eval 0,54] [%emt 00:02:15]} Qxd3 {(Qxd3) [%eval 0,60] [%emt 00:03:33]}
25.Rxd3 {(Rxd3) [%eval 0,61] [%emt 00:02:10]} Nxf6 {(Nxf6) [%eval 0,62] [%emt 00:01:35]}
26.Rxe7 {(Rxe7) [%eval 0,62] [%emt 00:02:23]} Rxe7 {(Rxe7) [%eval 0,62] [%emt 00:06:32]}
27.Kf1 {(Kf1) [%eval 0,63] [%emt 00:02:26]} g6 {(g6) [%eval 0,69] [%emt 00:02:15]}
28.Nf3 {(g3) [%eval 0,64] [%emt 00:02:51]} Kf8 {(Ne4) [%eval 0,61] [%emt 00:01:35]}
29.Rd8 {(g3) [%eval 0,63] [%emt 00:11:02]} Ne8 {(Ne8) [%eval 0,58] [%emt 00:01:39]}
30.Rc8 {(Rd3) [%eval 0,65] [%emt 00:05:56]} Kg7 {(Kg7) [%eval 0,57] [%emt 00:01:48]}
31.Rd8 {(Rc2) [%eval 0,66] [%emt 00:06:56]} Kf8 {(Nf6) [%eval 0,56] [%emt 00:02:19]}
32.g3 {(Rd2) [%eval 0,65] [%emt 00:03:25]} Re6 {(Rc7) [%eval 0,72] [%emt 00:01:36]}
33.Nd4 {(Nd4) [%eval 0,65] [%emt 00:01:31]} Rb6 {(Rb6) [%eval 0,68] [%emt 00:01:26]}
34.b3 {(b3) [%eval 0,66] [%emt 00:01:33]} Ke7 {(Ke7) [%eval 0,71] [%emt 00:01:49]}
35.Rb8 {(Rb8) [%eval 0,66] [%emt 00:03:41]} Nd6 {(Kd7) [%eval 0,72] [%emt 00:01:49]}
36.Ke2 {(Ke2) [%eval 0,64] [%emt 00:04:56]} Kf6 {(Kf6) [%eval 0,73] [%emt 00:02:18]}
37.h3 {(Rd8) [%eval 0,65] [%emt 00:09:13]} a5 {(Nf5) [%eval 0,77] [%emt 00:01:42]}
38.Ra8 {(Ra8) [%eval 0,66] [%emt 00:08:31]} Nb5 {(Nb5) [%eval 0,76] [%emt 00:01:37]}
39.Nxb5 {(Nxb5) [%eval 0,64] [%emt 00:02:32]} Rxb5 {(Rxb5) [%eval 0,78] [%emt 00:01:48]}
40.a4 {(a4) [%eval 0,67] [%emt 00:02:33]} Rxb3 {(Rxb3) [%eval 0,77] [%emt 00:02:20]}
41.Rxa5 {(Rxa5) [%eval 0,68] [%emt 00:04:17]} Rb2 {(b6) [%eval 0,78] [%emt 00:01:24]}
42.Ke1 {(Kf3) [%eval 0,65] [%emt 00:00:39]} h5 {(Rb1) [%eval 0,82] [%emt 00:01:31]}
43.h4 {(Ra7) [%eval 0,67] [%emt 00:00:43]} Rb6 {(Ke6) [%eval 0,76] [%emt 00:01:23]}
44.Ke2 {(Ra7) [%eval 0,67] [%emt 00:01:11]} Rb2 {(Rb4) [%eval 0,79] [%emt 00:01:52]}
45.Kf3 {(Kf1) [%eval 0,67] [%emt 00:00:50]} Rb3 {(Rb3) [%eval 0,77] [%emt 00:02:04]}
46.Ke2 {(Kg2) [%eval 0,69] [%emt 00:02:36]} Rb4 {(Rb4) [%eval 0,76] [%emt 00:01:25]}
47.Ke3 {(Kf3) [%eval 0,65] [%emt 00:02:35]} b6 {(Rb3) [%eval 0,79] [%emt 00:02:14]}
48.Ra6 {(Ra6) [%eval 0,66] [%emt 00:00:38]} Rb3 {(Rb3) [%eval 0,72] [%emt 00:01:14]}
49.Kd2 {(Kf4) [%eval 0,65] [%emt 00:02:04]} Kf5 {(Rb2) [%eval 0,79] [%emt 00:01:15]}
50.a5 {(Ra7) [%eval 0,67] [%emt 00:00:32]} bxa5 {(bxa5) [%eval 0,88] [%emt 00:03:09]}
51.Rxa5 {(Rxa5) [%eval 0,66] [%emt 00:00:23]} Kg4 {(Ke6) [%eval 0,84] [%emt 00:01:06]}
52.Ra7 {(Ra7) [%eval 0,66] [%emt 00:00:21]} Rf3 {(Kh3) [%eval 0,87] [%emt 00:01:11]}
53.Ke2 {(Ke2) [%eval 0,70] [%emt 00:00:46]} Rf5 {(Rf6) [%eval 0,88] [%emt 00:02:05]}
54.Kf1 {(Kf1) [%eval 0,71] [%emt 00:00:24]} Kh3 {(Kh3) [%eval 0,93] [%emt 00:01:39]}
55.Rd7 {(Rb7) [%eval 0,69] [%emt 00:00:32]} Kh2 {(f6) [%eval 0,93] [%emt 00:01:12]}
56.Rb7 {(Rc7) [%eval 0,66] [%emt 00:00:21]} Rf3 {(Kh3) [%eval 0,94] [%emt 00:01:53]}
57.Ra7 {(Ra7) [%eval 0,71] [%emt 00:00:38]} Kh3 {(Rc3) [%eval 0,151] [%emt 00:01:03]}
58.Ra1 {(Re7) [%eval 0,70] [%emt 00:00:23]} Rc3 {(Rd3) [%eval 0,146] [%emt 00:01:11]}
59.Rd1 {(Ra7) [%eval 0,69] [%emt 00:00:23]} Rc7 {(Rb3) [%eval 0,87] [%emt 00:02:42]}
60.Rd6 {(Kg1) [%eval 0,68] [%emt 00:00:28]} Rc1 {(Rc1) [%eval 0,94] [%emt 00:00:44]}
61.Ke2 {(Ke2) [%eval 0,71] [%emt 00:00:21]} Kg2 {(Kg2) [%eval 0,104] [%emt 00:01:10]}
1/2-1/2[/pgn]

[Graham Banks]

Semi-Slav › Marshall Gambit

1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 *

The Marshall Gambit is a brilliant conception. As White you happily give up a central pawn and allow the Black Queen to take a menacing post on the fringes of your camp. The Main Line continues 6...Qxd5 7.Bxb4 Qxe4+.

You must decide which piece will block the check. If it's the light square Bishop that must shield the King, the g2-pawn falls. Remarkably this is all part of the plan. The Rook is safe as the Queen would be trapped if that capture were made. In this line the Queens get traded and White generally ends up with better, centralized pieces and an attack for the pawn.
If the Knight goes to e2 then a different type of game unfolds. You play your Bishop to f8 to rupture Black's undeveloped Kingside. Amazingly the King cannot take. It would be checkmate next move as the White Queen sits on the open d-file. This line like the other sports a stunning array of tactical ideas.

http://www.learn-and-play-online-chess. ... chess.html

[bastiball]

Interesting games! I love it.

[Graham Banks]

GAME 11

As white, Stockfish grabbed the g2 pawn as well, but gave one of the pawn backs in order to complete development.
The two protagonists castled on opposite sides, and Komodo Dragon had some sneaky threats against the enemy king, even giving up the exchange in order to preserve them.
31. Bd5 from Stockfish was pleasing to the eye, but led to mass exchanges, after which we saw an interesting R+2P against N+4P endgame.
However, both sides felt that things were completely equal, and ChessGUI adjudicated the game as drawn, shortly after 60 moves.


[pgn][Event "SF v Komodo Dragon 16CPU"]
[Site "ChessGUI17"]
[Date "2022.06.10"]
[Round "6.1"]
[White "Stockfish 15 64-bit 16CPU"]
[Black "Dragon 3 by Komodo 64-bit 16CPU"]
[Result "1/2-1/2"]
[Time "9:47:22 am"]
[ECO "D31"]
[Opening "Marshall Gambit, Semi-Slav"]
[TimeControl "7200+30"]
[PlyCount "122"]
[Number "11"]
[Termination "GUI adjudication"]
[BlackType "program"]
[WhiteType "program"]
[Variant "normal"]

{ AMD Ryzen 9 5950X 16-Core Processor 3.40 GHz }
1.d4 {[%eval 0,1] [%emt 00:00:00]} d5 {[%eval 0,1] [%emt 00:00:00]}
2.c4 {[%eval 0,1] [%emt 00:00:00]} e6 {[%eval 0,1] [%emt 00:00:00]}
3.Nc3 {[%eval 0,1] [%emt 00:00:00]} c6 {[%eval 0,1] [%emt 00:00:00]}
4.e4 {[%eval 0,1] [%emt 00:00:00]} dxe4 {[%eval 0,1] [%emt 00:00:00]}
5.Nxe4 {[%eval 0,1] [%emt 00:00:00]} Bb4 {[%eval 0,1] [%emt 00:00:00]}
6.Bd2 {[%eval 0,1] [%emt 00:00:00]} Qxd4 {[%eval -23,37] [%emt 00:01:41]}
7.Bxb4 {(Bxb4) [%eval 6,50] [%emt 00:04:52]} Qxe4 {(Qxe4) [%eval -21,40] [%emt 00:02:34]}
8.Be2 {(Be2) [%eval 19,57] [%emt 00:06:01]} Na6 {(Na6) [%eval -15,40] [%emt 00:02:54]}
9.Bd6 {(Ba5) [%eval 5,57] [%emt 00:02:38]} Qxg2 {(Qxg2) [%eval -31,41] [%emt 00:02:47]}
10.Qd2 {(Qd2) [%eval 25,52] [%emt 00:02:20]} Nf6 {(Nf6) [%eval -19,43] [%emt 00:03:26]}
11.Bf3 {(Bf3) [%eval 19,55] [%emt 00:02:09]} Qg6 {(Qg6) [%eval 0,43] [%emt 00:02:43]}
12.O-O-O {(O-O-O) [%eval 11,55] [%emt 00:04:01]} e5 {(e5) [%eval 0,46] [%emt 00:02:08]}
13.Bxe5 {(Bxe5) [%eval 23,56] [%emt 00:04:00]} Be6 {(Be6) [%eval -2,47] [%emt 00:02:25]}
14.Ne2 {(Ne2) [%eval 13,57] [%emt 00:02:31]} Qf5 {(Qf5) [%eval -2,49] [%emt 00:01:54]}
15.Bf4 {(Bf4) [%eval 10,58] [%emt 00:02:49]} Qc5 {(Qc5) [%eval -28,47] [%emt 00:11:59]}
16.b3 {(b3) [%eval 10,55] [%emt 00:02:01]} Qa3 {(Nd5) [%eval 0,45] [%emt 00:04:32]}
17.Kb1 {(Kb1) [%eval 0,52] [%emt 00:02:13]} Bf5 {(Bf5) [%eval -25,46] [%emt 00:02:55]}
18.Ka1 {(Ka1) [%eval 0,56] [%emt 00:02:26]} O-O {(O-O) [%eval -1,46] [%emt 00:02:16]}
19.Bd6 {(Bd6) [%eval 0,57] [%emt 00:02:14]} Nc5 {(Nc5) [%eval 0,47] [%emt 00:02:05]}
20.Qe3 {(Qe3) [%eval 0,61] [%emt 00:03:07]} Nfd7 {(Nfd7) [%eval 0,50] [%emt 00:02:02]}
21.Bxf8 {(Bxf8) [%eval 0,59] [%emt 00:02:31]} Nxf8 {(Nxf8) [%eval 0,52] [%emt 00:03:46]}
22.Qc3 {(Nd4) [%eval 0,62] [%emt 00:02:55]} a5 {(a5) [%eval 0,55] [%emt 00:02:05]}
23.Rhg1 {(Rhg1) [%eval 0,63] [%emt 00:03:41]} Bg6 {(Bg6) [%eval 0,58] [%emt 00:02:35]}
24.Qb2 {(Qb2) [%eval 0,66] [%emt 00:05:16]} Qb4 {(Qb4) [%eval 0,59] [%emt 00:03:21]}
25.Qc3 {(Qc3) [%eval 0,67] [%emt 00:02:06]} Qa3 {(Qa3) [%eval 0,62] [%emt 00:04:33]}
26.Qb2 {(Qb2) [%eval 0,66] [%emt 00:07:39]} Qb4 {(Qb4) [%eval 0,62] [%emt 00:03:50]}
27.h4 {(Qc3) [%eval 0,70] [%emt 00:09:37]} a4 {(a4) [%eval 0,52] [%emt 00:02:03]}
28.bxa4 {(bxa4) [%eval 0,70] [%emt 00:04:40]} Qxa4 {(Qxa4) [%eval 0,54] [%emt 00:01:55]}
29.Nc1 {(Nc1) [%eval 0,70] [%emt 00:01:51]} Nfe6 {(Nfe6) [%eval 0,55] [%emt 00:03:23]}
30.h5 {(h5) [%eval 0,73] [%emt 00:04:01]} Bf5 {(Bf5) [%eval 0,55] [%emt 00:02:17]}
31.Bd5 {(Bd5) [%eval 0,68] [%emt 00:04:02]} cxd5 {(cxd5) [%eval 0,56] [%emt 00:02:30]}
32.cxd5 {(cxd5) [%eval 0,68] [%emt 00:01:55]} h6 {(h6) [%eval 0,57] [%emt 00:01:51]}
33.dxe6 {(dxe6) [%eval 0,71] [%emt 00:07:23]} Nxe6 {(Nxe6) [%eval 0,58] [%emt 00:03:06]}
34.Ne2 {(Ne2) [%eval 0,70] [%emt 00:02:28]} Bg4 {(Bg4) [%eval 0,57] [%emt 00:01:55]}
35.Rd3 {(Rd6) [%eval 0,71] [%emt 00:01:35]} Bxe2 {(Bxe2) [%eval 0,58] [%emt 00:01:32]}
36.Qxe2 {(Qxe2) [%eval 0,71] [%emt 00:01:27]} Nf4 {(Nf4) [%eval 0,65] [%emt 00:04:09]}
37.Qb2 {(Qb2) [%eval 0,83] [%emt 00:01:36]} Qxa2 {(Qxa2) [%eval 0,69] [%emt 00:01:55]}
38.Qxa2 {(Qxa2) [%eval 0,41] [%emt 00:00:01]} Rxa2 {(Rxa2) [%eval 0,68] [%emt 00:03:33]}
39.Kxa2 {(Kxa2) [%eval 0,89] [%emt 00:01:19]} Nxd3 {(Nxd3) [%eval 0,70] [%emt 00:01:49]}
40.Rf1 {(Kb3) [%eval 0,91] [%emt 00:01:28]} Nf4 {(Nc5) [%eval 0,70] [%emt 00:02:31]}
41.Rh1 {(Kb3) [%eval 0,87] [%emt 00:01:39]} Nd3 {(Kf8) [%eval 0,71] [%emt 00:01:57]}
42.f3 {(Kb3) [%eval 0,96] [%emt 00:01:27]} Ne5 {(Ne5) [%eval 0,67] [%emt 00:01:53]}
43.f4 {(Rd1) [%eval 0,98] [%emt 00:01:24]} Nd3 {(Nd3) [%eval 0,74] [%emt 00:02:04]}
44.f5 {(Rb1) [%eval 0,94] [%emt 00:01:07]} Kf8 {(Ne5) [%eval 0,70] [%emt 00:04:55]}
45.Kb3 {(Kb3) [%eval 0,94] [%emt 00:01:13]} Ke7 {(Nf2) [%eval 0,70] [%emt 00:01:32]}
46.Kc3 {(Kc4) [%eval 0,90] [%emt 00:02:23]} Nf4 {(Ne5) [%eval 0,69] [%emt 00:01:45]}
47.Kd4 {(Re1) [%eval 0,99] [%emt 00:01:23]} Ne2 {(Ne2) [%eval 0,66] [%emt 00:01:39]}
48.Ke5 {(Ke5) [%eval 0,102] [%emt 00:01:11]} f6 {(f6) [%eval 0,70] [%emt 00:01:56]}
49.Kd5 {(Kd5) [%eval 0,98] [%emt 00:04:44]} Ng3 {(Kf7) [%eval 0,70] [%emt 00:01:35]}
50.Rb1 {(Re1) [%eval 0,94] [%emt 00:01:07]} Kf8 {(Kf8) [%eval 0,71] [%emt 00:02:48]}
51.Rxb7 {(Rxb7) [%eval 0,98] [%emt 00:02:13]} Nxf5 {(Nxh5) [%eval 0,75] [%emt 00:01:03]}
52.Rb8 {(Ke6) [%eval 0,94] [%emt 00:01:20]} Kf7 {(Kf7) [%eval 0,77] [%emt 00:02:09]}
53.Rb7 {(Rb5) [%eval 0,93] [%emt 00:01:59]} Kf8 {(Kg8) [%eval 0,76] [%emt 00:05:59]}
54.Rb8 {(Rb6) [%eval 0,88] [%emt 00:00:56]} Kf7 {(Kf7) [%eval 0,75] [%emt 00:03:41]}
55.Rb1 {(Rb7) [%eval 0,99] [%emt 00:06:52]} Ne7 {(Ng3) [%eval 0,71] [%emt 00:00:34]}
56.Kc5 {(Ke4) [%eval 0,95] [%emt 00:00:23]} Nf5 {(f5) [%eval 0,71] [%emt 00:00:37]}
57.Rb4 {(Rb7) [%eval 0,89] [%emt 00:00:15]} Kf8 {(Ng3) [%eval 0,69] [%emt 00:00:35]}
58.Rb8 {(Rb8) [%eval 0,76] [%emt 00:00:24]} Kf7 {(Kf7) [%eval 0,71] [%emt 00:01:54]}
59.Rb5 {(Rb7) [%eval 0,91] [%emt 00:02:08]} Ng3 {(Ke6) [%eval 0,67] [%emt 00:02:33]}
60.Kd4 {(Rb7) [%eval 0,81] [%emt 00:00:49]} Ke6 {(f5) [%eval 0,71] [%emt 00:00:26]}
61.Rc5 {(Ke3) [%eval 0,81] [%emt 00:00:06]} Nf5 {(Nf5) [%eval 0,70] [%emt 00:00:35]}
1/2-1/2[/pgn]

[Graham Banks]

GAME 12

After Stockfish had taken the gambit pawn, Komodo Dragon created threats with its queen and black squared bishop, that led to black's position being passive.
Both sides castled long, but it was Komodo Dragon being the aggressor, with the pseudo-sac (16. Ne5) requiring Stockfish to be careful. The position was double-edged though, as white also had to be wary of threats against its king.
20....Nf7 held everything together for Stockfish, and then the queens came off, leaving each side with equal material (RRB + pawns).
Then the bishops came off as well, and the double rook and pawns ending was eventually drawn.

[pgn][Event "SF v Komodo Dragon 16CPU"]
[Site "ChessGUI17"]
[Date "2022.06.10"]
[Round "6.2"]
[White "Dragon 3 by Komodo 64-bit 16CPU"]
[Black "Stockfish 15 64-bit 16CPU"]
[Result "1/2-1/2"]
[Time "2:40:35 pm"]
[ECO "D31"]
[Opening "Marshall Gambit, Semi-Slav"]
[TimeControl "7200+30"]
[PlyCount "98"]
[Number "12"]
[Termination "GUI TB adjudication"]
[BlackType "program"]
[WhiteType "program"]
[Variant "normal"]

{ AMD Ryzen 9 5950X 16-Core Processor 3.40 GHz }
1.d4 {[%eval 0,1] [%emt 00:00:00]} d5 {[%eval 0,1] [%emt 00:00:00]}
2.c4 {[%eval 0,1] [%emt 00:00:00]} e6 {[%eval 0,1] [%emt 00:00:00]}
3.Nc3 {[%eval 0,1] [%emt 00:00:00]} c6 {[%eval 0,1] [%emt 00:00:00]}
4.e4 {[%eval 0,1] [%emt 00:00:00]} dxe4 {[%eval 0,1] [%emt 00:00:00]}
5.Nxe4 {[%eval 0,1] [%emt 00:00:00]} Bb4 {[%eval 0,1] [%emt 00:00:00]}
6.Bd2 {[%eval 0,1] [%emt 00:00:00]} Qxd4 {[%eval 0,53] [%emt 00:03:27]}
7.Bxb4 {(Bxb4) [%eval 23,38] [%emt 00:02:26]} Qxe4 {(Qxe4) [%eval 0,49] [%emt 00:01:49]}
8.Be2 {(Be2) [%eval 25,43] [%emt 00:05:14]} Na6 {(Na6) [%eval 0,58] [%emt 00:02:26]}
9.Ba5 {(Bd6) [%eval 7,41] [%emt 00:03:05]} b6 {(b6) [%eval 0,60] [%emt 00:04:29]}
10.Qd6 {(Qd6) [%eval 14,42] [%emt 00:02:17]} Bd7 {(Bd7) [%eval -3,55] [%emt 00:02:23]}
11.Bc3 {(Bc3) [%eval 9,42] [%emt 00:02:21]} f6 {(f6) [%eval 0,59] [%emt 00:02:12]}
12.Nf3 {(Nf3) [%eval 3,44] [%emt 00:15:20]} Nh6 {(Nh6) [%eval 0,62] [%emt 00:02:42]}
13.O-O-O {(Nd2) [%eval 7,46] [%emt 00:02:02]} Nc5 {(Nc5) [%eval 0,57] [%emt 00:02:04]}
14.Rhe1 {(Rhe1) [%eval 0,48] [%emt 00:03:24]} O-O-O {(O-O-O) [%eval 0,63] [%emt 00:02:26]}
15.Bf1 {(Bf1) [%eval 0,52] [%emt 00:02:16]} Qg6 {(Qf5) [%eval 0,63] [%emt 00:02:34]}
16.Ne5 {(Ne5) [%eval 8,49] [%emt 00:02:21]} fxe5 {(fxe5) [%eval 0,67] [%emt 00:03:51]}
17.Bxe5 {(Bxe5) [%eval 2,51] [%emt 00:02:17]} Kb7 {(Kb7) [%eval 0,69] [%emt 00:02:44]}
18.b4 {(b4) [%eval 3,51] [%emt 00:02:13]} Na6 {(Na6) [%eval 0,70] [%emt 00:03:42]}
19.b5 {(b5) [%eval 0,53] [%emt 00:03:21]} cxb5 {(cxb5) [%eval 0,69] [%emt 00:03:12]}
20.cxb5 {(cxb5) [%eval 0,54] [%emt 00:01:44]} Nf7 {(Nf7) [%eval 0,69] [%emt 00:04:21]}
21.bxa6 {(bxa6) [%eval 0,54] [%emt 00:03:10]} Ka8 {(Ka8) [%eval 0,70] [%emt 00:04:13]}
22.Qd3 {(Qd3) [%eval 0,54] [%emt 00:01:45]} Nxe5 {(Qxd3) [%eval 0,69] [%emt 00:08:09]}
23.Rxe5 {(Rxe5) [%eval 0,57] [%emt 00:03:03]} Qxd3 {(Qxd3) [%eval 0,68] [%emt 00:02:10]}
24.Bxd3 {(Rxd3) [%eval 0,55] [%emt 00:10:20]} Kb8 {(Kb8) [%eval 0,63] [%emt 00:02:46]}
25.Be4 {(Bc4) [%eval 0,57] [%emt 00:02:11]} Kc7 {(Kc7) [%eval 0,55] [%emt 00:01:48]}
26.h4 {(Rd2) [%eval 0,57] [%emt 00:02:39]} h6 {(h6) [%eval 0,63] [%emt 00:01:48]}
27.Bb7 {(Bb7) [%eval 0,57] [%emt 00:02:06]} Rdf8 {(Rdf8) [%eval 0,64] [%emt 00:02:10]}
28.Re4 {(Re4) [%eval 0,54] [%emt 00:01:30]} Rf5 {(Rf5) [%eval 0,68] [%emt 00:02:27]}
29.f4 {(Red4) [%eval 0,56] [%emt 00:03:36]} g5 {(Re8) [%eval 0,63] [%emt 00:02:00]}
30.fxg5 {(fxg5) [%eval 0,53] [%emt 00:03:28]} hxg5 {(hxg5) [%eval 0,68] [%emt 00:02:25]}
31.Red4 {(Red4) [%eval 0,53] [%emt 00:01:29]} Bc6 {(Bc6) [%eval 0,73] [%emt 00:01:48]}
32.h5 {(h5) [%eval 0,59] [%emt 00:02:02]} Rxh5 {(Rxh5) [%eval 0,71] [%emt 00:02:11]}
33.Rd8 {(Rd8) [%eval 0,63] [%emt 00:03:14]} Rc5 {(Rc5) [%eval 0,79] [%emt 00:01:49]}
34.Kb2 {(Kb2) [%eval 0,66] [%emt 00:03:59]} Bd5 {(Bd5) [%eval 0,84] [%emt 00:02:15]}
35.Bxd5 {(Bxd5) [%eval 0,65] [%emt 00:01:20]} exd5 {(exd5) [%eval 0,84] [%emt 00:01:59]}
36.R8xd5 {(R1xd5) [%eval 0,63] [%emt 00:01:43]} Kc6 {(Rxd5) [%eval 0,82] [%emt 00:01:55]}
37.Rd7 {(Rd7) [%eval 0,65] [%emt 00:02:05]} Rh4 {(Kb5) [%eval 0,81] [%emt 00:01:39]}
38.Rxa7 {(Rxa7) [%eval 0,65] [%emt 00:07:46]} Rg4 {(Kb5) [%eval 0,82] [%emt 00:02:20]}
39.Rg7 {(Rc1) [%eval 0,67] [%emt 00:04:46]} Rxg2 {(Rxg2) [%eval 0,67] [%emt 00:01:49]}
40.Kb3 {(Kb3) [%eval 0,66] [%emt 00:01:15]} Rb5 {(Kb5) [%eval 0,85] [%emt 00:02:47]}
41.Kc4 {(Kc4) [%eval 0,65] [%emt 00:01:48]} Rc5 {(Rc5) [%eval 0,82] [%emt 00:02:20]}
42.Kb3 {(Kb3) [%eval 0,66] [%emt 00:06:31]} Rg3 {(Rg3) [%eval 0,76] [%emt 00:01:40]}
43.Kb2 {(Kb2) [%eval 0,67] [%emt 00:05:08]} Ra5 {(Rb5) [%eval 0,85] [%emt 00:06:35]}
44.Rc1 {(Rc1) [%eval 0,65] [%emt 00:00:55]} Kd5 {(Kb5) [%eval 0,84] [%emt 00:01:08]}
45.a7 {(a7) [%eval 0,61] [%emt 00:00:42]} Rg2 {(Ke5) [%eval 0,86] [%emt 00:02:08]}
46.Kb1 {(Kb3) [%eval 0,60] [%emt 00:00:44]} Rgxa2 {(Rg3) [%eval 0,91] [%emt 00:02:14]}
47.Rxg5 {(Rxg5) [%eval 0,66] [%emt 00:02:45]} Kd6 {(Ke4) [%eval 0,106] [%emt 00:01:45]}
48.Rxa5 {(Rd1) [%eval 0,67] [%emt 00:01:07]} Rxa5 {(Rxa5) [%eval 0,139] [%emt 00:01:34]}
49.a8=Q {(a8=Q) [%eval 0,99] [%emt 00:00:04]} Rxa8 {(Rxa8) [%eval 0,234] [%emt 00:01:38]}
1/2-1/2[/pgn]

[Graham Banks]

Ruy Lopez, Marshall counter-attack

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. c3 d5 *

One of the world’s first Grandmasters of chess, America’s Frank J. Marshall (1877-1944), left behind a lasting legacy to the chess world with his revered gambit against the Ruy Lopez – the Marshall Attack with 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5! The Marshall Attack is one of the most important openings in the history of chess and is still deployed with regularity at super Grandmaster level. In current theory the ideas and strategies of both approaches are studied in-depth, and nowadays experts have come to the conclusion that White has no clear superiority in the main theoretical lines.

https://store.chessclub.com/har-zvi-the-marshall-attack

[Graham Banks]

GAME 13

After Stockfish had taken the gambit pawn, Komodo Dragon lined up its forces against the kingside.
Stockfish gave back the pawn in order to safely complete development, but was then offered another pawn, which it also captured.
The queens and rooks came off the board shortly afterwards, leaving an endgame in which Stockfish had an extra pawn, while Komodo Dragon had an active bishop pair, plus the more active king.
Stockfish played it safe, returning the pawn again, this time in order to enter a dead drawn ending with just opposite coloured bishops and pawns.

[pgn][Event "SF v Komodo Dragon 16CPU"]
[Site "ChessGUI17"]
[Date "2022.06.10"]
[Round "7.1"]
[White "Stockfish 15 64-bit 16CPU"]
[Black "Dragon 3 by Komodo 64-bit 16CPU"]
[Result "1/2-1/2"]
[Time "6:51:40 pm"]
[ECO "C89"]
[Opening "Marshall Attack, Ruy Lopez"]
[TimeControl "7200+30"]
[PlyCount "122"]
[Number "13"]
[Termination "GUI adjudication"]
[BlackType "program"]
[WhiteType "program"]
[Variant "normal"]

{ AMD Ryzen 9 5950X 16-Core Processor 3.40 GHz }
1.e4 {[%eval 0,1] [%emt 00:00:00]} e5 {[%eval 0,1] [%emt 00:00:00]}
2.Nf3 {[%eval 0,1] [%emt 00:00:00]} Nc6 {[%eval 0,1] [%emt 00:00:00]}
3.Bb5 {[%eval 0,1] [%emt 00:00:00]} a6 {[%eval 0,1] [%emt 00:00:00]}
4.Ba4 {[%eval 0,1] [%emt 00:00:00]} Nf6 {[%eval 0,1] [%emt 00:00:00]}
5.O-O {[%eval 0,1] [%emt 00:00:00]} Be7 {[%eval 0,1] [%emt 00:00:00]}
6.Re1 {[%eval 0,1] [%emt 00:00:00]} b5 {[%eval 0,1] [%emt 00:00:00]}
7.Bb3 {[%eval 0,1] [%emt 00:00:00]} O-O {[%eval 0,1] [%emt 00:00:00]}
8.c3 {[%eval 0,1] [%emt 00:00:00]} d5 {[%eval 0,1] [%emt 00:00:00]}
9.exd5 {[%eval 12,52] [%emt 00:04:31]} Nxd5 {(Nxd5) [%eval -27,40] [%emt 00:02:33]}
10.Nxe5 {(Nxe5) [%eval 27,50] [%emt 00:02:10]} Nxe5 {(Nxe5) [%eval -27,42] [%emt 00:02:47]}
11.Rxe5 {(Rxe5) [%eval 20,53] [%emt 00:02:15]} c6 {(c6) [%eval -17,41] [%emt 00:04:05]}
12.d3 {(d3) [%eval 21,55] [%emt 00:07:08]} Bd6 {(Bd6) [%eval -17,42] [%emt 00:02:24]}
13.Re1 {(Re1) [%eval 4,52] [%emt 00:01:51]} Bf5 {(Bf5) [%eval -16,45] [%emt 00:02:55]}
14.Qf3 {(Qf3) [%eval 16,51] [%emt 00:02:27]} Qh4 {(Qh4) [%eval -25,44] [%emt 00:02:25]}
15.g3 {(g3) [%eval 7,56] [%emt 00:02:22]} Qh3 {(Qh3) [%eval -15,44] [%emt 00:03:02]}
16.Be3 {(Be3) [%eval 7,52] [%emt 00:04:05]} Bxd3 {(Bxd3) [%eval -13,46] [%emt 00:01:57]}
17.Nd2 {(Bxd5) [%eval 13,52] [%emt 00:02:47]} Bf5 {(Bf5) [%eval -13,46] [%emt 00:04:21]}
18.Bxd5 {(Bxd5) [%eval 12,55] [%emt 00:02:55]} cxd5 {(cxd5) [%eval -11,48] [%emt 00:05:10]}
19.Qxd5 {(Qxd5) [%eval 7,50] [%emt 00:03:04]} Rfd8 {(Rfd8) [%eval -11,50] [%emt 00:02:41]}
20.Qg2 {(Qg2) [%eval 18,53] [%emt 00:07:37]} b4 {(b4) [%eval -11,50] [%emt 00:03:07]}
21.Qxh3 {(Qxh3) [%eval 11,54] [%emt 00:06:10]} Bxh3 {(Bxh3) [%eval -14,53] [%emt 00:02:09]}
22.Ne4 {(Ne4) [%eval 3,49] [%emt 00:01:24]} bxc3 {(bxc3) [%eval -13,54] [%emt 00:03:09]}
23.Nxc3 {(Nxc3) [%eval 7,52] [%emt 00:03:22]} f6 {(h5) [%eval -14,55] [%emt 00:11:53]}
24.Na4 {(Nd5) [%eval 5,55] [%emt 00:07:28]} Rac8 {(Bg4) [%eval -11,55] [%emt 00:02:37]}
25.Rac1 {(Rac1) [%eval 3,56] [%emt 00:03:15]} Bb4 {(Bb4) [%eval -10,56] [%emt 00:01:58]}
26.Rxc8 {(Rxc8) [%eval 2,66] [%emt 00:02:37]} Rxc8 {(Rxc8) [%eval -9,60] [%emt 00:07:03]}
27.Rc1 {(Rc1) [%eval 0,67] [%emt 00:04:40]} Rxc1 {(Rxc1) [%eval -9,61] [%emt 00:02:52]}
28.Bxc1 {(Bxc1) [%eval 0,40] [%emt 00:00:01]} Kf7 {(Kf7) [%eval -9,65] [%emt 00:08:10]}
29.a3 {(a3) [%eval 0,73] [%emt 00:01:51]} Be7 {(Be7) [%eval -9,64] [%emt 00:08:54]}
30.Nc3 {(Be3) [%eval 0,69] [%emt 00:01:35]} a5 {(Bd7) [%eval -4,49] [%emt 00:01:48]}
31.Be3 {(Be3) [%eval 3,53] [%emt 00:02:12]} Bd7 {(Bd7) [%eval -4,58] [%emt 00:01:21]}
32.a4 {(Nd5) [%eval 2,66] [%emt 00:02:25]} Ke6 {(Bb4) [%eval -2,55] [%emt 00:01:23]}
33.Bb6 {(Bb6) [%eval 2,70] [%emt 00:02:20]} Bb4 {(Bb4) [%eval -2,65] [%emt 00:03:18]}
34.Na2 {(Kf1) [%eval 2,71] [%emt 00:01:44]} Bxa4 {(Bxa4) [%eval 0,66] [%emt 00:01:34]}
35.Nxb4 {(Nxb4) [%eval 2,77] [%emt 00:14:12]} axb4 {(axb4) [%eval 0,68] [%emt 00:01:33]}
36.Bc5 {(f3) [%eval 2,77] [%emt 00:01:19]} b3 {(b3) [%eval 0,70] [%emt 00:04:50]}
37.f3 {(Bf8) [%eval 2,79] [%emt 00:01:19]} Kf5 {(g5) [%eval 0,68] [%emt 00:01:41]}
38.g4 {(Kf1) [%eval 2,76] [%emt 00:01:30]} Kg6 {(Kg6) [%eval 0,68] [%emt 00:01:28]}
39.h3 {(Kf2) [%eval 1,210] [%emt 00:02:04]} Bc6 {(f5) [%eval 0,67] [%emt 00:01:27]}
40.f4 {(Kf2) [%eval 2,78] [%emt 00:01:17]} f5 {(Bd7) [%eval 0,66] [%emt 00:02:27]}
41.g5 {(Kf2) [%eval 2,76] [%emt 00:01:15]} Kh5 {(Bb5) [%eval 0,71] [%emt 00:02:05]}
42.Bd4 {(Kh2) [%eval 2,73] [%emt 00:01:59]} h6 {(Kg6) [%eval 0,72] [%emt 00:01:27]}
43.gxh6 {(gxh6) [%eval 1,77] [%emt 00:01:12]} gxh6 {(Kxh6) [%eval 0,75] [%emt 00:07:06]}
44.Kh2 {(Bf2) [%eval 2,70] [%emt 00:01:16]} Be4 {(Kg6) [%eval 0,64] [%emt 00:05:34]}
45.Be5 {(Bg7) [%eval 2,69] [%emt 00:01:16]} Kh4 {(Kg6) [%eval 0,71] [%emt 00:00:55]}
46.Bf6 {(Bf6) [%eval 2,70] [%emt 00:01:19]} Kh5 {(Kh5) [%eval 0,5] [%emt 00:00:00]}
47.Be7 {(Kg3) [%eval 2,73] [%emt 00:18:44]} Bb7 {(Kg6) [%eval 0,66] [%emt 00:04:25]}
48.Bc5 {(Kg3) [%eval 2,65] [%emt 00:00:36]} Be4 {(Be4) [%eval 0,73] [%emt 00:01:01]}
49.Bg1 {(Kg3) [%eval 2,67] [%emt 00:00:43]} Bc6 {(Kg6) [%eval 0,71] [%emt 00:03:24]}
50.Bc5 {(Bf2) [%eval 2,70] [%emt 00:00:30]} Kh4 {(Be8) [%eval 0,70] [%emt 00:04:06]}
51.Be7 {(Be7) [%eval 2,70] [%emt 00:00:30]} Kh5 {(Kh5) [%eval 0,5] [%emt 00:00:00]}
52.Bf8 {(Kg3) [%eval 2,73] [%emt 00:00:35]} Bb7 {(Be8) [%eval 0,72] [%emt 00:00:27]}
53.Bg7 {(Kg3) [%eval 2,69] [%emt 00:00:29]} Ba6 {(Kg6) [%eval 0,72] [%emt 00:02:01]}
54.Bf8 {(Kg3) [%eval 2,58] [%emt 00:00:28]} Bf1 {(Kg6) [%eval 0,71] [%emt 00:00:22]}
55.Ba3 {(Be7) [%eval 2,66] [%emt 00:00:35]} Kh4 {(Ba6) [%eval 0,72] [%emt 00:00:41]}
56.Be7 {(Be7) [%eval 2,69] [%emt 00:00:36]} Kh5 {(Kh5) [%eval 0,5] [%emt 00:00:00]}
57.Ba3 {(Kg3) [%eval 2,62] [%emt 00:00:30]} Kh4 {(Kg6) [%eval 0,70] [%emt 00:00:20]}
58.Be7 {(Be7) [%eval 2,68] [%emt 00:00:28]} Kh5 {(Kh5) [%eval 0,5] [%emt 00:00:00]}
59.Bf8 {(Kg3) [%eval 2,66] [%emt 00:00:28]} Bd3 {(Kg6) [%eval 0,70] [%emt 00:01:37]}
60.Bg7 {(Kg3) [%eval 2,69] [%emt 00:00:28]} Bc2 {(Bc4) [%eval 0,71] [%emt 00:00:32]}
61.Be5 {(Kg3) [%eval 2,71] [%emt 00:00:39]} Be4 {(Bd3) [%eval 0,72] [%emt 00:00:29]}
1/2-1/2[/pgn]

[Graham Banks]

GAME 14

With reversed colours, the two engines followed exactly the same path as in the previous game, up until 23...h5.
A series of exchanges then led to an endgame where each side had a rook and bishop (opposite colours) and Komodo Dragon had a meaningless 3 on 2 pawn majority on the kingside.
As default ChessGUI draw adjudication settings don't kick in until after move 60, the game continued, despite the fact that it was dead drawn.


[pgn][Event "SF v Komodo Dragon 16CPU"]
[Site "ChessGUI17"]
[Date "2022.06.10"]
[Round "7.2"]
[White "Dragon 3 by Komodo 64-bit 16CPU"]
[Black "Stockfish 15 64-bit 16CPU"]
[Result "1/2-1/2"]
[Time "11:39:38 pm"]
[ECO "C89"]
[Opening "Marshall Attack, Ruy Lopez"]
[TimeControl "7200+30"]
[PlyCount "156"]
[Number "14"]
[Termination "GUI adjudication"]
[BlackType "program"]
[WhiteType "program"]
[Variant "normal"]

{ AMD Ryzen 9 5950X 16-Core Processor 3.40 GHz }
1.e4 {[%eval 0,1] [%emt 00:00:00]} e5 {[%eval 0,1] [%emt 00:00:00]}
2.Nf3 {[%eval 0,1] [%emt 00:00:00]} Nc6 {[%eval 0,1] [%emt 00:00:00]}
3.Bb5 {[%eval 0,1] [%emt 00:00:00]} a6 {[%eval 0,1] [%emt 00:00:00]}
4.Ba4 {[%eval 0,1] [%emt 00:00:00]} Nf6 {[%eval 0,1] [%emt 00:00:00]}
5.O-O {[%eval 0,1] [%emt 00:00:00]} Be7 {[%eval 0,1] [%emt 00:00:00]}
6.Re1 {[%eval 0,1] [%emt 00:00:00]} b5 {[%eval 0,1] [%emt 00:00:00]}
7.Bb3 {[%eval 0,1] [%emt 00:00:00]} O-O {[%eval 0,1] [%emt 00:00:00]}
8.c3 {[%eval 0,1] [%emt 00:00:00]} d5 {[%eval 0,1] [%emt 00:00:00]}
9.exd5 {[%eval 30,41] [%emt 00:03:32]} Nxd5 {(Nxd5) [%eval -11,56] [%emt 00:04:52]}
10.Nxe5 {(Nxe5) [%eval 29,42] [%emt 00:03:05]} Nxe5 {(Nxe5) [%eval -11,52] [%emt 00:03:12]}
11.Rxe5 {(Rxe5) [%eval 25,42] [%emt 00:03:26]} c6 {(c6) [%eval -20,56] [%emt 00:04:24]}
12.Re1 {(d3) [%eval 23,45] [%emt 00:04:47]} Bd6 {(Bd6) [%eval -15,54] [%emt 00:02:24]}
13.d3 {(d3) [%eval 23,44] [%emt 00:04:14]} Bf5 {(Bf5) [%eval -19,54] [%emt 00:06:19]}
14.Qf3 {(Qf3) [%eval 14,44] [%emt 00:05:53]} Qh4 {(Qh4) [%eval -8,54] [%emt 00:02:20]}
15.g3 {(g3) [%eval 17,45] [%emt 00:02:57]} Qh3 {(Qh3) [%eval -5,52] [%emt 00:02:28]}
16.Be3 {(Be3) [%eval 14,46] [%emt 00:05:11]} Bxd3 {(Bxd3) [%eval -8,52] [%emt 00:02:09]}
17.Nd2 {(Nd2) [%eval 16,48] [%emt 00:02:55]} Bf5 {(Bf5) [%eval -5,49] [%emt 00:02:04]}
18.Bxd5 {(Bxd5) [%eval 12,47] [%emt 00:06:15]} cxd5 {(cxd5) [%eval -9,54] [%emt 00:02:15]}
19.Qxd5 {(Qxd5) [%eval 13,49] [%emt 00:03:48]} Rfd8 {(Rfd8) [%eval -6,58] [%emt 00:03:07]}
20.Qg2 {(Qg2) [%eval 10,48] [%emt 00:05:32]} b4 {(b4) [%eval -6,54] [%emt 00:02:19]}
21.Qxh3 {(Qxh3) [%eval 12,48] [%emt 00:02:42]} Bxh3 {(Bxh3) [%eval -6,62] [%emt 00:04:48]}
22.Ne4 {(Ne4) [%eval 10,52] [%emt 00:02:20]} bxc3 {(bxc3) [%eval -5,55] [%emt 00:02:17]}
23.Nxc3 {(Nxc3) [%eval 13,55] [%emt 00:02:04]} h5 {(f6) [%eval -5,62] [%emt 00:02:20]}
24.Bb6 {(Rac1) [%eval 7,49] [%emt 00:04:32]} Rdb8 {(Rdb8) [%eval 0,52] [%emt 00:02:52]}
25.Na4 {(Na4) [%eval 9,50] [%emt 00:04:31]} a5 {(a5) [%eval 0,54] [%emt 00:02:14]}
26.Red1 {(Red1) [%eval 8,51] [%emt 00:09:25]} Be7 {(Be7) [%eval 0,53] [%emt 00:03:27]}
27.Rac1 {(Bd4) [%eval 5,53] [%emt 00:02:16]} Bg4 {(Bg4) [%eval 0,50] [%emt 00:02:02]}
28.Rd3 {(Rd3) [%eval 5,55] [%emt 00:01:50]} Bf5 {(Bf5) [%eval 0,55] [%emt 00:02:07]}
29.Rd5 {(Rd2) [%eval 5,53] [%emt 00:03:10]} Be6 {(Be6) [%eval 0,67] [%emt 00:02:08]}
30.Rxh5 {(Rxa5) [%eval 5,59] [%emt 00:01:38]} Bxa2 {(Bxa2) [%eval 0,68] [%emt 00:01:54]}
31.Rxa5 {(Rxa5) [%eval 5,57] [%emt 00:02:23]} Rxa5 {(Rxa5) [%eval 0,75] [%emt 00:02:40]}
32.Bxa5 {(Bxa5) [%eval 5,61] [%emt 00:01:49]} Ra8 {(Ra8) [%eval 0,74] [%emt 00:01:55]}
33.b4 {(b4) [%eval 5,62] [%emt 00:05:59]} Bxb4 {(Bxb4) [%eval 0,77] [%emt 00:02:15]}
34.Bxb4 {(Bxb4) [%eval 5,64] [%emt 00:04:04]} Rxa4 {(Rxa4) [%eval 0,73] [%emt 00:02:16]}
35.Bd2 {(Bd2) [%eval 5,61] [%emt 00:01:17]} Be6 {(Be6) [%eval 0,70] [%emt 00:02:00]}
36.h4 {(h4) [%eval 5,62] [%emt 00:01:29]} f6 {(Bd5) [%eval 0,245] [%emt 00:02:17]}
37.Rc3 {(Kf1) [%eval 5,58] [%emt 00:01:54]} Rd4 {(Bd5) [%eval 0,72] [%emt 00:02:04]}
38.Be3 {(Be3) [%eval 6,54] [%emt 00:01:13]} Ra4 {(Rb4) [%eval 0,70] [%emt 00:04:59]}
39.Rd3 {(Rc5) [%eval 6,48] [%emt 00:01:56]} Bf5 {(Bc4) [%eval 0,71] [%emt 00:02:00]}
40.Rd8 {(Rc3) [%eval 5,57] [%emt 00:06:45]} Kh7 {(Kh7) [%eval 0,78] [%emt 00:01:59]}
41.Kf1 {(f3) [%eval 5,59] [%emt 00:01:27]} Be4 {(Be4) [%eval 0,70] [%emt 00:01:35]}
42.Ke1 {(Ke2) [%eval 5,58] [%emt 00:01:06]} Bf3 {(Bf3) [%eval 0,70] [%emt 00:17:23]}
43.Kd2 {(Kd2) [%eval 5,58] [%emt 00:01:09]} Ra2 {(Kg6) [%eval 0,65] [%emt 00:01:27]}
44.Kc1 {(Kc3) [%eval 5,62] [%emt 00:01:12]} Ra6 {(Kg6) [%eval 0,64] [%emt 00:01:19]}
45.Kb2 {(Rd3) [%eval 5,59] [%emt 00:01:11]} Re6 {(Ra5) [%eval 0,62] [%emt 00:02:41]}
46.Rd7 {(Rd4) [%eval 5,60] [%emt 00:00:56]} Rc6 {(Ra6) [%eval 0,60] [%emt 00:01:42]}
47.Ra7 {(Rd4) [%eval 5,59] [%emt 00:03:43]} Be2 {(Rc8) [%eval 0,60] [%emt 00:01:25]}
48.Bd4 {(Bd4) [%eval 5,60] [%emt 00:00:50]} Bf3 {(Bf3) [%eval 0,55] [%emt 00:01:26]}
49.Rd7 {(Kb1) [%eval 5,58] [%emt 00:01:36]} Bd1 {(Re6) [%eval 0,57] [%emt 00:01:21]}
50.Bc3 {(Ra7) [%eval 5,50] [%emt 00:00:58]} Bg4 {(Bf3) [%eval 0,103] [%emt 00:03:38]}
51.Ra7 {(Rd2) [%eval 5,61] [%emt 00:01:02]} Rd6 {(Re6) [%eval 0,55] [%emt 00:00:49]}
52.Rc7 {(Kb1) [%eval 5,51] [%emt 00:00:53]} Rb6 {(Bf3) [%eval 0,245] [%emt 00:04:23]}
53.Kc2 {(Kc1) [%eval 5,58] [%emt 00:00:43]} Bf3 {(Rd6) [%eval 0,56] [%emt 00:01:53]}
54.Rc5 {(Re7) [%eval 5,49] [%emt 00:01:07]} Kg6 {(Ra6) [%eval 0,52] [%emt 00:01:06]}
55.Ra5 {(Ra5) [%eval 5,57] [%emt 00:00:56]} Re6 {(Rd6) [%eval 0,55] [%emt 00:01:00]}
56.Kc1 {(Kc1) [%eval 5,57] [%emt 00:00:47]} Re2 {(Re2) [%eval 0,58] [%emt 00:01:00]}
57.Bd4 {(Bd4) [%eval 5,58] [%emt 00:02:50]} Re1 {(Re1) [%eval 0,60] [%emt 00:01:04]}
58.Kd2 {(Kb2) [%eval 5,54] [%emt 00:01:17]} Re6 {(Re2) [%eval 0,70] [%emt 00:04:36]}
59.Ra7 {(Ra4) [%eval 5,49] [%emt 00:00:55]} Rd6 {(Re2) [%eval 0,57] [%emt 00:00:38]}
60.Ke3 {(Ra4) [%eval 5,55] [%emt 00:00:30]} Bc6 {(Bg2) [%eval 0,52] [%emt 00:01:57]}
61.f3 {(Bc5) [%eval 6,53] [%emt 00:00:29]} Rd7 {(Rd7) [%eval 0,69] [%emt 00:00:28]}
62.Ra3 {(Rxd7) [%eval 6,53] [%emt 00:00:37]} Bxf3 {(Bxf3) [%eval 0,79] [%emt 00:00:28]}
63.Bxf6 {(Bxf6) [%eval 1,50] [%emt 00:00:50]} Kxf6 {(Bc6) [%eval 0,80] [%emt 00:00:39]}
64.Ra6 {(Kxf3) [%eval 6,61] [%emt 00:01:15]} Kf7 {(Kf7) [%eval 0,81] [%emt 00:00:44]}
65.Kxf3 {(Kxf3) [%eval 1,62] [%emt 00:01:53]} Rd3 {(g6) [%eval 0,110] [%emt 00:00:33]}
66.Kf4 {(Ke4) [%eval 6,63] [%emt 00:00:49]} Rd4 {(Rd4) [%eval 0,79] [%emt 00:00:30]}
67.Kf3 {(Kf5) [%eval 6,63] [%emt 00:02:01]} Rd3 {(Rd3) [%eval 0,84] [%emt 00:00:28]}
68.Kg4 {(Kg4) [%eval 6,65] [%emt 00:00:17]} g6 {(Rd4) [%eval 0,82] [%emt 00:00:28]}
69.Ra7 {(Ra7) [%eval 1,59] [%emt 00:00:25]} Kf6 {(Kf6) [%eval 0,90] [%emt 00:00:28]}
70.Kh3 {(h5) [%eval 1,61] [%emt 00:00:45]} Rd5 {(Rd1) [%eval 0,144] [%emt 00:00:33]}
71.Ra8 {(Ra6) [%eval 1,61] [%emt 00:00:22]} Rb5 {(Kg7) [%eval 0,82] [%emt 00:00:27]}
72.Ra3 {(g4) [%eval 1,61] [%emt 00:00:25]} Kg7 {(Rd5) [%eval 0,78] [%emt 00:00:25]}
73.Ra7 {(Ra6) [%eval 1,62] [%emt 00:00:21]} Kg8 {(Kh6) [%eval 0,79] [%emt 00:00:29]}
74.Ra2 {(Ra8) [%eval 1,59] [%emt 00:00:55]} Rb6 {(Kg7) [%eval 0,76] [%emt 00:00:37]}
75.Ra8 {(Ra7) [%eval 1,63] [%emt 00:00:24]} Kh7 {(Kh7) [%eval 0,74] [%emt 00:00:28]}
76.Ra7 {(Ra3) [%eval 1,60] [%emt 00:00:36]} Kh6 {(Kg8) [%eval 0,76] [%emt 00:00:32]}
77.Ra5 {(g4) [%eval 1,63] [%emt 00:00:24]} Rb7 {(Kg7) [%eval 0,84] [%emt 00:00:31]}
78.Ra4 {(Ra6) [%eval 1,61] [%emt 00:00:35]} Kh7 {(Rb1) [%eval 0,71] [%emt 00:00:29]}
1/2-1/2[/pgn]

[Graham Banks]

Italian Game - Fried Liver Attack

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 *

Originating from an Italian Game opening, white plays an early Ng5 and takes the f7 pawn, drawing the black king into the center! Many players with black will prefer to avoid allowing the Fried Liver Attack, because this opening is considered very dangerous – white will often obtain a big attack.
After 6…Kxf7 7. Qf3+ , the point of white’s sacrifice is revealed. The black king can’t return to the eighth rank because the knight on d5 is under attack. If white were to win that knight, white would be up material AND have a big attack on the exposed black king!
Black needs to play 7…Ke6 to defend the knight, and after the universal 8. Nc3 (adding pressured to the pinned Knight), we arrive at the true starting position of the Fried Liver Attack:
Black is up a piece for the time being, but the king on e6 is extremely vulnerable.

https://chesspathways.com/fried-liver-attack/

[Graham Banks]

GAME 15

After white was allowed to capture the e5 pawn, there followed an interesting period of play, in which Stockfish ended up with 4 pawns for the sacrificed piece after the queens came off, but Komodo Dragon's king was completely safe.
The last pair of rooks came off, leaving Stockfish with B + 5 pawns against BN + 1 pawn, with the bishops being of opposite colours.
5 pawns v 1 in such a situation sounds daunting, particularly when there are two connected passers on the queenside, but both engines evaluated the ending as 0.00.
Once Komodo Dragon had blocked the passed pawns, the game continued until exchanges led to tablebases adjudication.

[pgn][Event "SF v Komodo Dragon 16CPU"]
[Site "ChessGUI17"]
[Date "2022.06.11"]
[Round "8.1"]
[White "Stockfish 15 64-bit 16CPU"]
[Black "Dragon 3 by Komodo 64-bit 16CPU"]
[Result "1/2-1/2"]
[Time "4:45:44 am"]
[ECO "C57"]
[Opening "Fried Liver; Fegatello Attack, 2 Knights"]
[TimeControl "7200+30"]
[PlyCount "140"]
[Number "15"]
[Termination "GUI TB adjudication"]
[BlackType "program"]
[WhiteType "program"]
[Variant "normal"]

{ AMD Ryzen 9 5950X 16-Core Processor 3.40 GHz }
1.e4 {[%eval 0,1] [%emt 00:00:00]} e5 {[%eval 0,1] [%emt 00:00:00]}
2.Nf3 {[%eval 0,1] [%emt 00:00:00]} Nc6 {[%eval 0,1] [%emt 00:00:00]}
3.Bc4 {[%eval 0,1] [%emt 00:00:00]} Nf6 {[%eval 0,1] [%emt 00:00:00]}
4.Ng5 {[%eval 0,1] [%emt 00:00:00]} d5 {[%eval 0,1] [%emt 00:00:00]}
5.exd5 {[%eval 0,1] [%emt 00:00:00]} Nxd5 {[%eval 0,1] [%emt 00:00:00]}
6.Nxf7 {[%eval 0,1] [%emt 00:00:00]} Kxf7 {[%eval 0,1] [%emt 00:00:00]}
7.Qf3 {[%eval 65,46] [%emt 00:04:01]} Ke6 {(Ke6) [%eval -62,39] [%emt 00:03:04]}
8.Nc3 {(Nc3) [%eval 89,48] [%emt 00:02:57]} Nb4 {(Nb4) [%eval -84,39] [%emt 00:03:51]}
9.O-O {(O-O) [%eval 83,47] [%emt 00:02:14]} c6 {(c6) [%eval -83,40] [%emt 00:02:51]}
10.d4 {(d4) [%eval 72,50] [%emt 00:02:49]} Qf6 {(Qf6) [%eval -74,37] [%emt 00:03:26]}
11.Qe2 {(Qe2) [%eval 84,50] [%emt 00:02:39]} Ke7 {(Ke7) [%eval -64,39] [%emt 00:02:55]}
12.dxe5 {(Ne4) [%eval 74,53] [%emt 00:12:39]} Qg6 {(Qg6) [%eval -62,39] [%emt 00:02:55]}
13.Ne4 {(Ne4) [%eval 59,50] [%emt 00:02:11]} Bf5 {(Bf5) [%eval -56,39] [%emt 00:02:45]}
14.f3 {(f3) [%eval 69,49] [%emt 00:05:53]} Ke8 {(Ke8) [%eval -59,38] [%emt 00:03:10]}
15.a3 {(a3) [%eval 63,50] [%emt 00:02:14]} Na6 {(Na6) [%eval -55,39] [%emt 00:04:31]}
16.Bxd5 {(Bxd5) [%eval 62,50] [%emt 00:02:26]} cxd5 {(cxd5) [%eval -53,42] [%emt 00:02:28]}
17.Nd6 {(Nd6) [%eval 66,45] [%emt 00:01:57]} Bxd6 {(Bxd6) [%eval -49,40] [%emt 00:03:14]}
18.exd6 {(exd6) [%eval 68,45] [%emt 00:02:13]} Kf7 {(Kf8) [%eval -59,42] [%emt 00:08:45]}
19.Qe7 {(Qe7) [%eval 69,47] [%emt 00:02:14]} Kg8 {(Kg8) [%eval -59,5] [%emt 00:00:00]}
20.Qxb7 {(Qxb7) [%eval 72,49] [%emt 00:02:56]} Re8 {(Re8) [%eval -49,43] [%emt 00:03:03]}
21.Qxd5 {(Bf4) [%eval 63,49] [%emt 00:02:11]} Qf7 {(Qf7) [%eval -62,37] [%emt 00:03:42]}
22.Qd4 {(Qd4) [%eval 55,47] [%emt 00:04:17]} h5 {(h5) [%eval -43,38] [%emt 00:02:33]}
23.Be3 {(Be3) [%eval 44,47] [%emt 00:06:17]} Bxc2 {(Nb8) [%eval -47,38] [%emt 00:03:12]}
24.Rfe1 {(Rac1) [%eval 51,48] [%emt 00:03:30]} Kh7 {(Nb8) [%eval -28,38] [%emt 00:03:22]}
25.Rac1 {(b4) [%eval 59,54] [%emt 00:04:33]} Bf5 {(Bf5) [%eval -44,45] [%emt 00:02:25]}
26.Qxa7 {(Qxa7) [%eval 70,51] [%emt 00:02:12]} Qxa7 {(Qxa7) [%eval -34,47] [%emt 00:02:53]}
27.Bxa7 {(Bxa7) [%eval 52,56] [%emt 00:05:01]} Rxe1 {(Rxe1) [%eval -31,48] [%emt 00:03:47]}
28.Rxe1 {(Rxe1) [%eval 47,55] [%emt 00:02:09]} Nb8 {(Nb8) [%eval -30,52] [%emt 00:01:51]}
29.Bb6 {(a4) [%eval 45,57] [%emt 00:13:09]} Nd7 {(Nd7) [%eval -25,44] [%emt 00:02:18]}
30.Bd4 {(Bd4) [%eval 52,52] [%emt 00:01:42]} Kg6 {(Kg6) [%eval -12,48] [%emt 00:03:12]}
31.Re7 {(h3) [%eval 42,50] [%emt 00:01:42]} Nf6 {(Nf6) [%eval -13,47] [%emt 00:02:14]}
32.Be5 {(Be5) [%eval 41,54] [%emt 00:01:27]} Rd8 {(Rd8) [%eval -7,50] [%emt 00:02:10]}
33.Kf2 {(Kf2) [%eval 31,52] [%emt 00:05:49]} h4 {(Bc2) [%eval -6,54] [%emt 00:02:22]}
34.g4 {(a4) [%eval 35,63] [%emt 00:03:42]} hxg3 {(hxg3) [%eval 0,60] [%emt 00:02:08]}
35.hxg3 {(hxg3) [%eval 32,51] [%emt 00:01:12]} Rd7 {(Bd7) [%eval 0,65] [%emt 00:02:07]}
36.Rxd7 {(g4) [%eval 0,83] [%emt 00:08:48]} Nxd7 {(Nxd7) [%eval 0,66] [%emt 00:03:17]}
37.f4 {(Bc3) [%eval 0,76] [%emt 00:01:24]} Kf7 {(Bc2) [%eval 0,67] [%emt 00:01:53]}
38.Ke3 {(Ke3) [%eval 0,77] [%emt 00:01:19]} g6 {(Bc2) [%eval 0,70] [%emt 00:02:37]}
39.b4 {(Kd4) [%eval 0,72] [%emt 00:01:56]} Bg4 {(Bc2) [%eval 0,70] [%emt 00:04:34]}
40.b5 {(Kd4) [%eval 0,74] [%emt 00:01:18]} Ke6 {(Ke6) [%eval 0,65] [%emt 00:01:48]}
41.Kd4 {(a4) [%eval 0,79] [%emt 00:01:01]} Bd1 {(Be2) [%eval 0,66] [%emt 00:01:41]}
42.Kc4 {(Kc4) [%eval 0,69] [%emt 00:01:05]} Be2 {(Be2) [%eval 0,70] [%emt 00:07:58]}
43.Kb4 {(Kb4) [%eval 0,73] [%emt 00:01:12]} Kd5 {(Kd5) [%eval 0,72] [%emt 00:01:26]}
44.a4 {(a4) [%eval 0,72] [%emt 00:00:59]} Bf3 {(Nc5) [%eval 0,71] [%emt 00:02:21]}
45.a5 {(a5) [%eval 0,77] [%emt 00:01:01]} Bg4 {(Be2) [%eval 0,72] [%emt 00:02:08]}
46.a6 {(a6) [%eval 0,78] [%emt 00:00:56]} Nb6 {(Nb6) [%eval 0,66] [%emt 00:01:46]}
47.d7 {(a7) [%eval 0,76] [%emt 00:01:13]} Nxd7 {(Nxd7) [%eval 0,69] [%emt 00:01:28]}
48.Ka5 {(Bc7) [%eval 0,69] [%emt 00:01:01]} Kc5 {(Kc5) [%eval 0,71] [%emt 00:01:18]}
49.Bb2 {(a7) [%eval 0,75] [%emt 00:00:59]} Kd6 {(Kd6) [%eval 0,67] [%emt 00:01:06]}
50.Be5 {(Ba3) [%eval 0,72] [%emt 00:01:44]} Kc5 {(Kc5) [%eval 0,70] [%emt 00:05:48]}
51.Bc3 {(b6) [%eval 0,72] [%emt 00:00:52]} Kd6 {(Kd6) [%eval 0,67] [%emt 00:01:10]}
52.Bd2 {(Bd4) [%eval 0,75] [%emt 00:00:46]} Be2 {(Kc7) [%eval 0,66] [%emt 00:01:10]}
53.Bc3 {(f5) [%eval 0,77] [%emt 00:00:41]} Bg4 {(Kc7) [%eval 0,67] [%emt 00:01:01]}
54.Ba1 {(b6) [%eval 0,73] [%emt 00:00:59]} Be2 {(Be2) [%eval 0,67] [%emt 00:01:05]}
55.Bb2 {(Bb2) [%eval 0,73] [%emt 00:00:59]} Bg4 {(Bf3) [%eval 0,66] [%emt 00:02:27]}
56.Ba1 {(Ba3) [%eval 0,87] [%emt 00:01:48]} Be2 {(Kc5) [%eval 0,68] [%emt 00:01:47]}
57.Bd4 {(a7) [%eval 0,67] [%emt 00:00:27]} Bf3 {(Bg4) [%eval 0,66] [%emt 00:03:16]}
58.Be5 {(a7) [%eval 0,69] [%emt 00:00:36]} Kc5 {(Kc5) [%eval 0,65] [%emt 00:02:37]}
59.Bb2 {(Bc7) [%eval 0,68] [%emt 00:00:33]} Kd6 {(Kd6) [%eval 0,67] [%emt 00:02:08]}
60.f5 {(g4) [%eval 0,71] [%emt 00:00:28]} gxf5 {(gxf5) [%eval 0,63] [%emt 00:00:56]}
61.Bc1 {(Bc1) [%eval 0,74] [%emt 00:00:25]} Kd5 {(Kc7) [%eval 0,65] [%emt 00:00:16]}
62.Bf4 {(Bf4) [%eval 0,72] [%emt 00:00:29]} Kc4 {(Kc5) [%eval 0,67] [%emt 00:00:24]}
63.Be3 {(Be3) [%eval 0,97] [%emt 00:00:31]} Nc5 {(Be4) [%eval 0,63] [%emt 00:00:30]}
64.Bg1 {(Bf4) [%eval 0,81] [%emt 00:00:34]} Bg2 {(Nd7) [%eval 0,67] [%emt 00:00:29]}
65.b6 {(Be3) [%eval 0,79] [%emt 00:00:27]} Nb3 {(Nd7) [%eval 0,74] [%emt 00:00:42]}
66.Ka4 {(Ka4) [%eval 0,58] [%emt 00:00:01]} Bc6 {(Bc6) [%eval -7,67] [%emt 00:00:38]}
67.Ka3 {(Ka3) [%eval 0,62] [%emt 00:00:02]} Na5 {(Na5) [%eval 0,75] [%emt 00:00:18]}
68.g4 {(b7) [%eval 0,105] [%emt 00:00:33]} fxg4 {(Kb5) [%eval 0,70] [%emt 00:00:23]}
69.b7 {(Bh2) [%eval 0,131] [%emt 00:00:32]} Bxb7 {(Bxb7) [%eval 0,99] [%emt 00:00:23]}
70.axb7 {(axb7) [%eval 0,164] [%emt 00:00:30]} Nxb7 {(Nxb7) [%eval 0,99] [%emt 00:00:03]}
1/2-1/2[/pgn]