The "Oh shit..." moment.

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BeyondCritics
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The "Oh shit..." moment.

Post by BeyondCritics » Mon Nov 12, 2018 6:44 am


This is a position from the second game of the world championship match between Carlsen and Caruana. Caruna with black had just played 10...Rd8!? and this move really scared Carlsen off and finally he responded with the tame 11.Be2, although after the match both players agreed that 11.Nd2 would have been critical.
The question posed is now: What was it, what Carlsen feared so much and what would have been objectively strongest?
According to some shallow stockfish lines, after 11.Nd2 11....dxc4 is the only move, with the forced sequence 12.Nxc4 Rxd1+ 12.Qxd1 Qd8 13.Qxd8 Nxd8 and better endgame for white.
I have seen no explicit explanation until today, so maybe you could be first 8-)

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AdminX
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Re: The "Oh shit..." moment.

Post by AdminX » Mon Nov 12, 2018 10:55 am

I don't know if I would call it a 'Oh Shit Moment', In game 2 Fabi was playing his opening moves quickly when compared to game 1. Probably because he (Fabi) wanted to save time for the more critical moments in the latter stages of the game. Carlsen on the other hand could not know if it was for this reason or a prepared novelty. My conclusion is he did not want to walk into an opening trap or a position where his opponent was better prepared.

PS: Leela thought Nd2 was a better move also.
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Werewolf
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Re: The "Oh shit..." moment.

Post by Werewolf » Mon Nov 12, 2018 11:45 am

AdminX wrote:
Mon Nov 12, 2018 10:55 am
I don't know if I would call it a 'Oh Shit Moment',
Agreed, Carlsen was just avoiding his opponent's prep

zenpawn
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Re: The "Oh shit..." moment.

Post by zenpawn » Mon Nov 12, 2018 11:58 am

The OP's title refers to Carlsen's own comments. When asked at the press conference, "You seemed surprised by Black's move 10. What were you thinking?" Carlsen replied "Well, 'Oh sh*t', mainly." He elaborated: "Basically, there are two main moves for Black, 10...Re8 and 10...Be7. It's kind of unpleasant to face a move that's clearly based on some very complicated variations and to be unprepared. I think there's a very clear parallel to one of the games between Korchnoi and Karpov from the world championship in 1978 where instead of 10...Rd8, 10...Re8 was the move that Karpov invented. And then Korchnoi actually thought for a long time and almost refuted the move over the board. Improvements have still been found for Black but he actually managed to find the solution there. The difference now is that I am facing not only an analytical team of Fabiano, himself and his helpers, but also his computer help. That makes the situation quite a bit different."
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BeyondCritics
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Re: The "Oh shit..." moment.

Post by BeyondCritics » Mon Nov 12, 2018 2:36 pm

@zenpawn Thanks for clarifying this, my exposition could have been clearer.
So far nobody has solved this. I will post my analysis tomorrow.

Dann Corbit
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Re: The "Oh shit..." moment.

Post by Dann Corbit » Mon Nov 12, 2018 8:48 pm

Current SF says:

Code: Select all

Searching: r1br2k1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/3RKB1R w K - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   +1.54   00:00    5765  b4 
 2   -0.03   00:00   26972  b4 Nxb4 axb4 
 3   +0.26   00:00   42138  b4 Nxb4 axb4 
 4   +0.06   00:00   76505  b4 Nxb4 axb4 Bxb4 
 5   +0.00   00:00  139026  b4 Nxb4 axb4 Bxb4 
 6   +0.28   00:00  170567  Nd2 e5 Nb3 
 7   +0.62   00:00  199643  Be2 d4 exd4 Nxd4 Nxd4 Rxd4 
 8   +0.85   00:00  268146  Be2 d4 exd4 Bxd4 O-O e5 Bd2 
 9   +0.89   00:00  305722  Be2 d4 exd4 Nxd4 Nxd4 Rxd4 Bd2 Qc7 
10   +0.76   00:00  385507  Be2 Ne4 cxd5 Nxc3 bxc3 exd5 O-O h6 Rb1 a6 
11   +0.62   00:00  551849  Be2 Ne4 cxd5 Nxc3 bxc3 Rxd5 O-O Be7 Rxd5 exd5 Rd1 h6 
12   +0.61   00:00  721549  Be2 Ne4 cxd5 Nxc3 bxc3 Rxd5 Rxd5 exd5 O-O Qxa3 Rd1 g6 Qb1 Qxc3 Rxd5 
13   +0.50   00:00   1110K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 exd5 h3 Qxa3 Bc7 Rd7 Bg3 Rd8 Rfe1 
14   +0.70   00:00   1467K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 Rxd5 Nd2 h6 h3 Bxa3 Nc4 Qc5 Nxa3 
15   +0.60   00:00   1852K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 Rxd5 Rxd5 Qxd5 Bg3 Bxa3 Nd4 Nxd4 exd4 Kh8 Bf3 Qf5 
16   +0.42   00:00   2250K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 Rxd5 Rxd5 Qxd5 Bd3 Qh5 Be4 g5 Bg3 g4 Bxc6 bxc6 Ne5 Ba6 Rb1 
17   +0.44   00:00   3501K  Be2 Ne4 cxd5 Nxc3 bxc3 Rxd5 O-O Be7 Rxd5 Qxd5 Bd3 g6 Rd1 Qc5 Be4 Bf6 c4 e5 Bg3 Be6 Rb1 Rd8 Rxb7 Bxc4 
18   +0.38   00:00   4427K  Be2 Ne4 O-O Nxc3 bxc3 Ne7 Rb1 dxc4 Bxc4 Nd5 Bxd5 Rxd5 a4 Bd7 Ng5 g6 Rxb7 Bxa4 
19   +0.53   00:01   9007K  Be2 Ne4 cxd5 exd5 Rxd5 Nxc3 Rxd8+ Nxd8 bxc3 Bxa3 Bd3 g6 O-O Be7 Rb1 Ne6 Bg3 Nc5 Be4 Nxe4 Qxe4 Qf5 Qxf5 gxf5 Rb5 Bf6 
20   +0.88   00:01  17002K  Nd2 d4 Nb3 Qb6 Na4 Bb4+ axb4 Qxb4+ Nd2 e5 Bg5 Qa5 Qb3 Nb4 Be2 Bd7 Bxf6 gxf6 Nc3 dxc3 bxc3 Na6 
21   +0.51   00:03  31031K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Bg3 Nd5 Ne4 Be7 Ned6 Na5 Bd3 Nxc4 Nxc4 Bd7 O-O Rc8 Qb3 Bc6 Rc1 Nb6 Nxb6 Qxb6 Qxb6 axb6 b4 
22   +0.54   00:03  35453K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 b6 b4 Bf8 Bd6 Bb7 Bxf8 Kxf8 f3 Rc8 Kd2 Nd5 Nxd5 Bxd5 Rc1 f6 e4 Bxc4 
23   +0.50   00:05  49534K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Be7 Bd6 Kf8 Kd2 b6 Rc1 Nc6 Ne4 Nxe4+ Bxe4 Bb7 Bxe7+ Kxe7 Ne5 Rd8+ Nd3 Na5 Bxb7 Nxb7 Rc7+ Rd7 Rxd7+ Kxd7 Ne5+ Ke7 Nc6+ Kd7 Nxa7 Nd6 
24   +0.70   00:07  65313K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Be7 Ke2 b6 Bd6 Kf8 Bxe7+ Kxe7 Ne5 Bb7 Nb5 Rc8 Nxa7 Rc5 Nf3 Be4 Bxe4 Nxe4 Rd1 Rc2+ Kd3 
25   +0.61   00:10  96566K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Nd5 Nxd5 exd5 Nd6 Ne6 Bg3 Bd7 Nxb7 Be7 Nd6 Rd8 Nb5 Bf6 b4 d4 Nxa7 dxe3 b5 exf2+ Bxf2 
26   +0.64   00:11 109788K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 b6 Nd6 Bd7 Bf3 Bc6 Ke2 Bxf3+ Kxf3 Bxd6 Bxd6 Rc8 Rd1 Nb7 Be7 Na5 Bxf6 gxf6 Ne4 f5 
27   +0.52   00:16 154256K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Be2 Bd7 Bf3 Bc6 e4 b6 Bd6 Bxd6 Nxd6 Nb7 Nxb7 Bxb7 Rd1 Rd8+ Ke3 Rxd1 Bxd1 Kf8 b4 Ke7 Be2 a5 g4 Nd7 g5 axb4 axb4 
28   +0.62   00:17 163827K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Be2 Nd5 Rd1 b6 Nxd5 exd5 Nd6 Ne6 Nxc8 Rxc8 Be5 f6 Bc3 Nc5 f3 Bd6 Bb5 Bxh2 Ke2 Be5 Bxe5 fxe5 Rxd5 e4 
29   +0.44   00:24 230956K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Nd5 Nxd5 exd5 Nd6 Bd7 Ke2 a5 Bg3 b6 h4 h5 Bb5 Bxb5+ Nxb5 Ne6 Rd1 Rd8 Nc7 Nxc7 Bxc7 Rd7 Be5 f6 Bd4 Kf7 Bxc5 bxc5 Kf3 
30   +0.47   00:27 257524K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Be7 e4 b6 O-O Ba6 Rd1 Nb7 Be2 Rd8 Rxd8+ Nxd8 f3 Bc5+ Kf1 Bd4 Be3 Nc6 Kf2 Kf8 Bxd4 Nxd4 Ne5 Nxe2 Nxe2 Bxe2 Kxe2 Ke8 Ke3 Nd7 Nxd7 
31   +0.51   00:32 304506K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Nd5 Nxd5 exd5 Nd6 Ne6 Bg3 Bxd6 Bxd6 Bd7 f3 Rd8 Kf2 d4 exd4 Ba4 d5 Rxd6 dxe6 fxe6 Ke3 Kf7 Rc1 Rc6 Rxc6 Bxc6 Bd3 h5 Be4 Bxe4 Kxe4 Kf6 h4 a5 
32   +0.45   00:48 455219K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Bd7 Ne5 Be8 O-O Be7 Rd1 Nc6 Nc4 Rd8 Rxd8 Nxd8 e4 Nc6 Bd6 Kf8 e5 Nd7 f4 f6 Kf2 fxe5 fxe5 Bxd6 exd6 Nd4 
33   +0.50   01:02 593497K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Bxe7+ Kxe7 Rc1 Nxc3 Rxc3 Bd7 f4 g6 Ne5 Bc6 b4 a6 g4 f6 Nc4 b5 Na5 Bd7 h4 e5 fxe5 fxe5 g5 Ne6 Be4 Rd8 
34   +0.44   01:17 727223K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Bxe7+ Kxe7 Rc1 Nxc3 Rxc3 Bd7 Ne5 Nc6 Nxd7 Kxd7 Rc1 h6 b4 a6 Be4 Kd6 Bxc6 bxc6 Rc5 f6 Ke2 g6 e4 Rd8 Ke3 Rc8 e5+ fxe5 
35   +0.63   01:27 820252K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Nd5 Nxd5 exd5 Nd6 Ne6 Bg3 Bxd6 Bxd6 Bd7 Kd2 Rd8 Bb4 f5 Rc1 Kf7 Bc5 b6 Bd6 g6 b4 Bb5 Bxb5 Rxd6 f3 d4 e4 Kf6 Rc8 Nf4 exf5 Nxg2 fxg6 hxg6 
36   +0.38   02:41   1529M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Rd1 Nxf4 exf4 Rb8 b4 f6 Nb5 a6 Nbd6 Nf7 Nxf7 Kxf7 Nb6 e5 fxe5 fxe5 Nd7 Bxd7 Rxd7 Ke6 Bg4+ Kf6 g3 g6 Kg2 a5 bxa5 Ra8 Rd5 e4 Be2 h5 Rb5 Bd8 g4 hxg4 Rxb7 Rxa5 Rb8 
37   +0.39   03:13   1829M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Kd2 Ne8 e4 f6 e5 Bd7 Rd1 Bc6 g4 Rc8 Kc2 Nf7 Kb3 fxe5 Nxe5 Nxe5 Bxe5 Kf7 f4 Nf6 f5 exf5 gxf5 a5 Bc4+ Kf8 Be6 Rd8 Rxd8+ Bxd8 Kc2 Bb6 h4 
38   +0.50   04:08   2352M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Rc1 Nxc3 Rxc3 Bd7 Bxe7+ Kxe7 Ne5 Nc6 Nxd7 Kxd7 f4 h6 b4 a6 g4 g6 Rc1 Rc8 h4 Kd6 Be4 f5 gxf5 exf5 
39   +0.39   05:30   3136M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Nxd5 exd5 Nd6 Bd7 Rd1 Bc6 Bf3 Ne6 Bxd5 Rd8 Bxe6 fxe6 f3 Bxd6 Rxd6 Rxd6 Bxd6 Kf7 Be5 Bb5 Kf2 Bc4 h4 a5 e4 a4 Ke3 Bf1 g3 Bc4 Kd4 Be2 f4 g6 Bb8 Bg4 Ke3 Kf6 Be5+ Ke7 
40   +0.45   05:55   3377M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Rc1 Nxc3 Rxc3 Bd7 Bxe7+ Kxe7 f4 h6 Ne5 Rc8 Nxd7 Rxc3 Kxc3 Kxd7 b4 Kd6 Kc4 e5 f5 Nc6 Be4 h5 Kb5 Ne7 Bxb7 Nxf5 e4 Ne3 Ka6 Nxg2 Kxa7 
41   +0.50   07:08   4076M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Rc1 Nxc3 Rxc3 Bd7 Bxe7+ Kxe7 f4 h6 Ne5 Rc8 Nxd7 Kxd7 Rxc8 Kxc8 h4 Kc7 h5 Kd6 Ke2 e5 Kf3 exf4 exf4 a5 Ke3 Ne6 Bc4 f6 g4 a4 Bxe6 Kxe6 Ke4 Ke7 
42   +0.38   08:29   4837M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Nxd5 exd5 Nd6 Bd7 Rd1 Bc6 Bf3 Ne6 Bxd5 Rd8 Bxe6 fxe6 f3 Bxd6 Rxd6 Rxd6 Bxd6 a5 Kf2 Kf7 h4 Kf6 Bc7 a4 e4 Bb5 g4 g6 f4 Kf7 Be5 Bc4 Ke3 Bb3 g5 Bc4 Kd4 Bb5 Kc5 
43   +0.50   09:44   5542M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Nxd5 exd5 Nd6 Bd7 Rd1 Ne6 Be5 f6 Nf5 Bf8 Bc3 Bc6 Bf3 Rd8 Rc1 Kf7 Nd4 Nxd4 Bxd4 a5 Be2 f5 f4 Be7 Kf2 g6 g3 Re8 Bf3 a4 Rd1 Ra8 h4 Bf6 h5 Bxd4 
44   +0.51   12:19   6982M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Nd6 Bd7 O-O Nd5 Nxd5 exd5 Rd1 Ne6 Be5 Bxd6 Bxd6 d4 exd4 Ba4 Rd2 Rd8 Bb4 Rxd4 f3 Rxd2 Bxd2 Bb3 Kf2 f6 Ke3 Kf7 Bb4 g6 Bd6 Ke8 Bb5+ Kf7 Bd3 Ke8 Bb4 b6 Bb5+ Kf7 Bc6 h5 Bc3 Nc5 h3 Ke6 
45   +0.50   14:06   7970M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Nd6 Bd7 O-O Nd5 Nxd5 exd5 Rd1 Ne6 Be5 Bxd6 Bxd6 d4 exd4 Ba4 Rd2 Rd8 Bb4 Rxd4 f3 Rxd2 Bxd2 Bb3 Kf2 f6 Ke3 Kf7 Bb4 Nc7 Kd4 Nd5 Bd2 g6 h4 b6 Bd3 Ke6 g4 Ne7 Be3 Nd5 
46   +0.50   15:00   8476M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Nd6 Bd7 O-O Nd5 Nxd5 exd5 Rd1 Ne6 Be5 Bxd6 Bxd6 d4 exd4 Ba4 Rd2 Rd8 Bb4 Rxd4 f3 Rxd2 Bxd2 Bb3 Kf2 f6 Ke3 Kf7 Bb4 Nc7 Kd4 Nd5 Bd2 g6 h4 b6 Bd3 Ke6 g4 Ne7 Be3 Nd5 
Nodes: 8476229379
Nodes/second: 9417990
Best move: Nd2
Ponder move: dxc4
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Eelco de Groot
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Re: The "Oh shit..." moment.

Post by Eelco de Groot » Tue Nov 13, 2018 7:32 am

Dann Corbit wrote:
Mon Nov 12, 2018 8:48 pm
Current SF says:

Code: Select all

Searching: r1br2k1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/3RKB1R w K - 0 1
infinite: 0 time: 0 increment: 0 moves to go: 0

 1   +1.54   00:00    5765  b4 
 2   -0.03   00:00   26972  b4 Nxb4 axb4 
 3   +0.26   00:00   42138  b4 Nxb4 axb4 
 4   +0.06   00:00   76505  b4 Nxb4 axb4 Bxb4 
 5   +0.00   00:00  139026  b4 Nxb4 axb4 Bxb4 
 6   +0.28   00:00  170567  Nd2 e5 Nb3 
 7   +0.62   00:00  199643  Be2 d4 exd4 Nxd4 Nxd4 Rxd4 
 8   +0.85   00:00  268146  Be2 d4 exd4 Bxd4 O-O e5 Bd2 
 9   +0.89   00:00  305722  Be2 d4 exd4 Nxd4 Nxd4 Rxd4 Bd2 Qc7 
10   +0.76   00:00  385507  Be2 Ne4 cxd5 Nxc3 bxc3 exd5 O-O h6 Rb1 a6 
11   +0.62   00:00  551849  Be2 Ne4 cxd5 Nxc3 bxc3 Rxd5 O-O Be7 Rxd5 exd5 Rd1 h6 
12   +0.61   00:00  721549  Be2 Ne4 cxd5 Nxc3 bxc3 Rxd5 Rxd5 exd5 O-O Qxa3 Rd1 g6 Qb1 Qxc3 Rxd5 
13   +0.50   00:00   1110K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 exd5 h3 Qxa3 Bc7 Rd7 Bg3 Rd8 Rfe1 
14   +0.70   00:00   1467K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 Rxd5 Nd2 h6 h3 Bxa3 Nc4 Qc5 Nxa3 
15   +0.60   00:00   1852K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 Rxd5 Rxd5 Qxd5 Bg3 Bxa3 Nd4 Nxd4 exd4 Kh8 Bf3 Qf5 
16   +0.42   00:00   2250K  Be2 Ne4 O-O Nxc3 bxc3 Be7 cxd5 Rxd5 Rxd5 Qxd5 Bd3 Qh5 Be4 g5 Bg3 g4 Bxc6 bxc6 Ne5 Ba6 Rb1 
17   +0.44   00:00   3501K  Be2 Ne4 cxd5 Nxc3 bxc3 Rxd5 O-O Be7 Rxd5 Qxd5 Bd3 g6 Rd1 Qc5 Be4 Bf6 c4 e5 Bg3 Be6 Rb1 Rd8 Rxb7 Bxc4 
18   +0.38   00:00   4427K  Be2 Ne4 O-O Nxc3 bxc3 Ne7 Rb1 dxc4 Bxc4 Nd5 Bxd5 Rxd5 a4 Bd7 Ng5 g6 Rxb7 Bxa4 
19   +0.53   00:01   9007K  Be2 Ne4 cxd5 exd5 Rxd5 Nxc3 Rxd8+ Nxd8 bxc3 Bxa3 Bd3 g6 O-O Be7 Rb1 Ne6 Bg3 Nc5 Be4 Nxe4 Qxe4 Qf5 Qxf5 gxf5 Rb5 Bf6 
20   +0.88   00:01  17002K  Nd2 d4 Nb3 Qb6 Na4 Bb4+ axb4 Qxb4+ Nd2 e5 Bg5 Qa5 Qb3 Nb4 Be2 Bd7 Bxf6 gxf6 Nc3 dxc3 bxc3 Na6 
21   +0.51   00:03  31031K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Bg3 Nd5 Ne4 Be7 Ned6 Na5 Bd3 Nxc4 Nxc4 Bd7 O-O Rc8 Qb3 Bc6 Rc1 Nb6 Nxb6 Qxb6 Qxb6 axb6 b4 
22   +0.54   00:03  35453K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 b6 b4 Bf8 Bd6 Bb7 Bxf8 Kxf8 f3 Rc8 Kd2 Nd5 Nxd5 Bxd5 Rc1 f6 e4 Bxc4 
23   +0.50   00:05  49534K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Be7 Bd6 Kf8 Kd2 b6 Rc1 Nc6 Ne4 Nxe4+ Bxe4 Bb7 Bxe7+ Kxe7 Ne5 Rd8+ Nd3 Na5 Bxb7 Nxb7 Rc7+ Rd7 Rxd7+ Kxd7 Ne5+ Ke7 Nc6+ Kd7 Nxa7 Nd6 
24   +0.70   00:07  65313K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Be7 Ke2 b6 Bd6 Kf8 Bxe7+ Kxe7 Ne5 Bb7 Nb5 Rc8 Nxa7 Rc5 Nf3 Be4 Bxe4 Nxe4 Rd1 Rc2+ Kd3 
25   +0.61   00:10  96566K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Nd5 Nxd5 exd5 Nd6 Ne6 Bg3 Bd7 Nxb7 Be7 Nd6 Rd8 Nb5 Bf6 b4 d4 Nxa7 dxe3 b5 exf2+ Bxf2 
26   +0.64   00:11 109788K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 b6 Nd6 Bd7 Bf3 Bc6 Ke2 Bxf3+ Kxf3 Bxd6 Bxd6 Rc8 Rd1 Nb7 Be7 Na5 Bxf6 gxf6 Ne4 f5 
27   +0.52   00:16 154256K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Be2 Bd7 Bf3 Bc6 e4 b6 Bd6 Bxd6 Nxd6 Nb7 Nxb7 Bxb7 Rd1 Rd8+ Ke3 Rxd1 Bxd1 Kf8 b4 Ke7 Be2 a5 g4 Nd7 g5 axb4 axb4 
28   +0.62   00:17 163827K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Be2 Nd5 Rd1 b6 Nxd5 exd5 Nd6 Ne6 Nxc8 Rxc8 Be5 f6 Bc3 Nc5 f3 Bd6 Bb5 Bxh2 Ke2 Be5 Bxe5 fxe5 Rxd5 e4 
29   +0.44   00:24 230956K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Nd5 Nxd5 exd5 Nd6 Bd7 Ke2 a5 Bg3 b6 h4 h5 Bb5 Bxb5+ Nxb5 Ne6 Rd1 Rd8 Nc7 Nxc7 Bxc7 Rd7 Be5 f6 Bd4 Kf7 Bxc5 bxc5 Kf3 
30   +0.47   00:27 257524K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Bd3 Be7 e4 b6 O-O Ba6 Rd1 Nb7 Be2 Rd8 Rxd8+ Nxd8 f3 Bc5+ Kf1 Bd4 Be3 Nc6 Kf2 Kf8 Bxd4 Nxd4 Ne5 Nxe2 Nxe2 Bxe2 Kxe2 Ke8 Ke3 Nd7 Nxd7 
31   +0.51   00:32 304506K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Nd5 Nxd5 exd5 Nd6 Ne6 Bg3 Bxd6 Bxd6 Bd7 f3 Rd8 Kf2 d4 exd4 Ba4 d5 Rxd6 dxe6 fxe6 Ke3 Kf7 Rc1 Rc6 Rxc6 Bxc6 Bd3 h5 Be4 Bxe4 Kxe4 Kf6 h4 a5 
32   +0.45   00:48 455219K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Bd7 Ne5 Be8 O-O Be7 Rd1 Nc6 Nc4 Rd8 Rxd8 Nxd8 e4 Nc6 Bd6 Kf8 e5 Nd7 f4 f6 Kf2 fxe5 fxe5 Bxd6 exd6 Nd4 
33   +0.50   01:02 593497K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Bxe7+ Kxe7 Rc1 Nxc3 Rxc3 Bd7 f4 g6 Ne5 Bc6 b4 a6 g4 f6 Nc4 b5 Na5 Bd7 h4 e5 fxe5 fxe5 g5 Ne6 Be4 Rd8 
34   +0.44   01:17 727223K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Bxe7+ Kxe7 Rc1 Nxc3 Rxc3 Bd7 Ne5 Nc6 Nxd7 Kxd7 Rc1 h6 b4 a6 Be4 Kd6 Bxc6 bxc6 Rc5 f6 Ke2 g6 e4 Rd8 Ke3 Rc8 e5+ fxe5 
35   +0.63   01:27 820252K  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Nd5 Nxd5 exd5 Nd6 Ne6 Bg3 Bxd6 Bxd6 Bd7 Kd2 Rd8 Bb4 f5 Rc1 Kf7 Bc5 b6 Bd6 g6 b4 Bb5 Bxb5 Rxd6 f3 d4 e4 Kf6 Rc8 Nf4 exf5 Nxg2 fxg6 hxg6 
36   +0.38   02:41   1529M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Rd1 Nxf4 exf4 Rb8 b4 f6 Nb5 a6 Nbd6 Nf7 Nxf7 Kxf7 Nb6 e5 fxe5 fxe5 Nd7 Bxd7 Rxd7 Ke6 Bg4+ Kf6 g3 g6 Kg2 a5 bxa5 Ra8 Rd5 e4 Be2 h5 Rb5 Bd8 g4 hxg4 Rxb7 Rxa5 Rb8 
37   +0.39   03:13   1829M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Kd2 Ne8 e4 f6 e5 Bd7 Rd1 Bc6 g4 Rc8 Kc2 Nf7 Kb3 fxe5 Nxe5 Nxe5 Bxe5 Kf7 f4 Nf6 f5 exf5 gxf5 a5 Bc4+ Kf8 Be6 Rd8 Rxd8+ Bxd8 Kc2 Bb6 h4 
38   +0.50   04:08   2352M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Rc1 Nxc3 Rxc3 Bd7 Bxe7+ Kxe7 Ne5 Nc6 Nxd7 Kxd7 f4 h6 b4 a6 g4 g6 Rc1 Rc8 h4 Kd6 Be4 f5 gxf5 exf5 
39   +0.39   05:30   3136M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Nxd5 exd5 Nd6 Bd7 Rd1 Bc6 Bf3 Ne6 Bxd5 Rd8 Bxe6 fxe6 f3 Bxd6 Rxd6 Rxd6 Bxd6 Kf7 Be5 Bb5 Kf2 Bc4 h4 a5 e4 a4 Ke3 Bf1 g3 Bc4 Kd4 Be2 f4 g6 Bb8 Bg4 Ke3 Kf6 Be5+ Ke7 
40   +0.45   05:55   3377M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Rc1 Nxc3 Rxc3 Bd7 Bxe7+ Kxe7 f4 h6 Ne5 Rc8 Nxd7 Rxc3 Kxc3 Kxd7 b4 Kd6 Kc4 e5 f5 Nc6 Be4 h5 Kb5 Ne7 Bxb7 Nxf5 e4 Ne3 Ka6 Nxg2 Kxa7 
41   +0.50   07:08   4076M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Kd2 Be7 Bd3 Nd5 Bd6 Kf8 Rc1 Nxc3 Rxc3 Bd7 Bxe7+ Kxe7 f4 h6 Ne5 Rc8 Nxd7 Kxd7 Rxc8 Kxc8 h4 Kc7 h5 Kd6 Ke2 e5 Kf3 exf4 exf4 a5 Ke3 Ne6 Bc4 f6 g4 a4 Bxe6 Kxe6 Ke4 Ke7 
42   +0.38   08:29   4837M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Nxd5 exd5 Nd6 Bd7 Rd1 Bc6 Bf3 Ne6 Bxd5 Rd8 Bxe6 fxe6 f3 Bxd6 Rxd6 Rxd6 Bxd6 a5 Kf2 Kf7 h4 Kf6 Bc7 a4 e4 Bb5 g4 g6 f4 Kf7 Be5 Bc4 Ke3 Bb3 g5 Bc4 Kd4 Bb5 Kc5 
43   +0.50   09:44   5542M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 O-O Nd5 Nxd5 exd5 Nd6 Bd7 Rd1 Ne6 Be5 f6 Nf5 Bf8 Bc3 Bc6 Bf3 Rd8 Rc1 Kf7 Nd4 Nxd4 Bxd4 a5 Be2 f5 f4 Be7 Kf2 g6 g3 Re8 Bf3 a4 Rd1 Ra8 h4 Bf6 h5 Bxd4 
44   +0.51   12:19   6982M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Nd6 Bd7 O-O Nd5 Nxd5 exd5 Rd1 Ne6 Be5 Bxd6 Bxd6 d4 exd4 Ba4 Rd2 Rd8 Bb4 Rxd4 f3 Rxd2 Bxd2 Bb3 Kf2 f6 Ke3 Kf7 Bb4 g6 Bd6 Ke8 Bb5+ Kf7 Bd3 Ke8 Bb4 b6 Bb5+ Kf7 Bc6 h5 Bc3 Nc5 h3 Ke6 
45   +0.50   14:06   7970M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Nd6 Bd7 O-O Nd5 Nxd5 exd5 Rd1 Ne6 Be5 Bxd6 Bxd6 d4 exd4 Ba4 Rd2 Rd8 Bb4 Rxd4 f3 Rxd2 Bxd2 Bb3 Kf2 f6 Ke3 Kf7 Bb4 Nc7 Kd4 Nd5 Bd2 g6 h4 b6 Bd3 Ke6 g4 Ne7 Be3 Nd5 
46   +0.50   15:00   8476M  Nd2 dxc4 Nxc4 Rxd1+ Qxd1 Qd8 Qxd8+ Nxd8 Be2 Be7 Nd6 Bd7 O-O Nd5 Nxd5 exd5 Rd1 Ne6 Be5 Bxd6 Bxd6 d4 exd4 Ba4 Rd2 Rd8 Bb4 Rxd4 f3 Rxd2 Bxd2 Bb3 Kf2 f6 Ke3 Kf7 Bb4 Nc7 Kd4 Nd5 Bd2 g6 h4 b6 Bd3 Ke6 g4 Ne7 Be3 Nd5 
Nodes: 8476229379
Nodes/second: 9417990
Best move: Nd2
Ponder move: dxc4
Magnus would have had about a +0.67 if he had played Nd2. But his opponent would have been prepared. That can work both ways but Magnus would have had to find everything over the board.

Code: Select all

r1br2k1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/3RKB1R w K -

Engine: Kaissa IV
This is the standard old 2018-7-31 Stockfish code, with versionnumber 015, that is to be found on Rybkaforum,  512 MB.
The newer ones I made are pruning far too much probably, or the shorter PVs on Fail High are not so good for Kaissa.
Or the randow drawscores, or.. 
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

21/26  0:01   +0.61    1.Be2 d4 2.exd4 Bxd4 3.O-O Bxc3 
                       4.Rxd8+ Nxd8 5.bxc3 Bd7 6.Be5 Bc6 
                       7.Bxf6 gxf6 8.Qd2 Qxa3 9.Qf4 Bxf3 
                       10.Bxf3 Qxc3 11.Rd1 Nc6 (2.321.281) 1587 

22/28  0:01   +0.48    1.Be2 d4 2.exd4 Bxd4 3.O-O Qf5 
                       4.Qxf5 exf5 5.Nb5 Bxb2 6.Rxd8+ Nxd8 
                       7.Rb1 Ne6 8.Bd6 a6 9.Rxb2 axb5 
                       10.Rxb5 Ra6 11.Be7 Nf4 12.Bd1 Ng6 
                       13.Bxf6 Rxf6 14.Kh1 (2.926.476) 1603 

23/34  0:03   +0.64++  1.Be2 (4.948.301) 1599 

23/34  0:03   +0.53    1.Be2 d4 2.exd4 Bxd4 3.Bd2 Qf5 4.Bd3 Bxf2+ 
                       5.Ke2 Rxd3 6.Qxd3 Qxd3+ 7.Kxd3 e5 
                       8.Bg5 Bf5+ 9.Ke2 Bd4 10.Bxf6 gxf6 
                       11.Nxd4 exd4 12.Nb5 Bg4+ 13.Kd3 Bxd1 
                       14.Rxd1 (5.070.917) 1605 

24/36  0:03   +0.60    1.Be2 d4 2.exd4 Bxd4 3.Bd2 Qf5 4.Bd3 Bxf2+ 
                       5.Ke2 Rxd3 6.Qxd3 Qxd3+ 7.Kxd3 e5 
                       8.Bg5 Bf5+ 9.Ke2 Bd4 10.Bxf6 gxf6 
                       11.Nxd4 exd4 12.Nd5 Bg4+ 13.Kd2 Bxd1 
                       14.Rxd1 (6.089.264) 1615 

25/29  0:04   +0.68++  1.Be2 (6.621.054) 1614 

25/38  0:04   +0.75++  1.Be2 (7.282.789) 1608 

25/38  0:05   +0.82    1.Be2 Ne4 2.O-O Nxc3 3.bxc3 Be7 
                       4.cxd5 exd5 5.a4 g6 6.Qb3 Bf6 7.Bg5 Bxg5 
                       8.Nxg5 h6 9.Nf3 Qb6 10.Qa3 Bg4 
                       11.Rd2 Qc7 12.Rfd1 Qe7 13.Qxe7 (8.911.504) 1606 

26/30  0:05   +0.74--  1.Be2 Ne4 (9.511.932) 1607 

26/30  0:06   +0.67--  1.Be2 Ne4 (10.172.440) 1605 

26/30  0:06   +0.74++  1.Be2 (10.548.695) 1604 

26/30  0:07   +0.67    1.Be2 Ne4 2.O-O Nxc3 3.bxc3 Be7 
                       4.cxd5 Rxd5 5.Rxd5 exd5 6.a4 Bf6 
                       7.c4 Be6 8.Rb1 dxc4 9.Rb5 Qc3 
                       10.Qxc3 Bxc3 11.Rxb7 f6 12.Bg3 Rc8 (11.526.624) 1598 

27/31  0:07   +0.60--  1.Be2 d4 (12.741.516) 1599 

27/33  0:08   +0.63    1.Be2 d4 2.exd4 Bxd4 3.Bd2 Qf5 4.Bd3 Bxf2+ 
                       5.Ke2 Qc5 6.Na4 Qd6 7.Be3 Nd4+ 
                       8.Bxd4 Bxd4 9.Bxh7+ Nxh7 10.Rxd4 Qc7 
                       11.Rxd8+ Qxd8 12.Rd1 Qc7 13.Qd3 Nf8 
                       14.Nc3 (14.083.200) 1596 

28/36  0:10   +0.71++  1.Be2 (16.116.951) 1588 

28/40  0:10   +0.78++  1.Be2 (16.863.542) 1589 

28/40  0:11   +0.56--  1.Be2 d4 (18.796.025) 1594 

28/40  0:12   +0.65    1.Be2 Ne4 2.cxd5 Nxc3 3.bxc3 exd5 
                       4.O-O Be7 5.Ra1 Bf6 6.Rfc1 b6 7.Bd3 g6 
                       8.Nd4 Nxd4 9.cxd4 Bd7 10.Qe2 Rdc8 
                       11.Rc7 Rxc7 12.Bxc7 (19.862.264) 1592 

29/25  0:13   +0.72++  1.Be2 (21.040.345) 1593 

29/38  0:15   +0.80++  1.Be2 (25.241.886) 1588 

29/38  0:17   +0.70    1.Be2 Ne4 2.cxd5 Nxc3 3.bxc3 Rxd5 
                       4.O-O Be7 5.Rxd5 Qxd5 6.Rd1 Qc5 7.e4 Qxa3 
                       8.e5 Qa5 9.Bd3 h6 10.Be4 a6 11.h3 Kh8 
                       12.h4 Kg8 13.Bg3 Qc7 (27.989.038) 1585 

30/35  0:20   +0.72    1.Be2 d4 2.exd4 Bxd4 3.Bd2 Qf5 4.Bd3 Bxf2+ 
                       5.Ke2 Rxd3 6.Qxd3 Qxd3+ 7.Kxd3 e5 
                       8.Bg5 Bf5+ 9.Ke2 Bd4 10.Bxf6 Bxc3 
                       11.bxc3 gxf6 12.h3 Na5 13.Nd2 Be6 
                       14.c5 (32.188.132) 1581 

31/38  0:22   +0.64--  1.Be2 d4 (36.071.583) 1580 

31/42  0:26   +0.72++  1.Nd2 (42.034.219) 1577 

31/42  0:34   +0.57--  1.Nd2 dxc4 (54.307.921) 1589 

31/42  0:36   +0.70++  1.Nd2 (58.324.582) 1596 

31/42  0:37   +0.88++  1.Nd2 (60.632.971) 1596 

31/42  0:40   +0.65    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Nd5 6.Nxd5 exd5 
                       7.Nd6 Bd7 8.Bg3 a5 9.Kd2 Bc6 10.h4 Ne6 
                       11.h5 Bxd6 12.Bxd6 d4 13.e4 Rd8 
                       14.Bg3 (64.796.615) 1599 

32/36  0:43   +0.72++  1.Nd2 (69.718.658) 1600 

32/36  0:44   +0.80++  1.Nd2 (70.517.614) 1600 

32/37  0:46   +0.87    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Bd3 Nd5 5.O-O g6 6.Be4 Nxc3 7.bxc3 Qxd1 
                       8.Rxd1 Be7 9.Bf3 Bf6 10.Bg3 Be7 
                       11.Nd6 h5 12.h4 e5 13.Bxc6 bxc6 
                       14.Bxe5 (75.077.791) 1602 

33/33  0:50   +0.80--  1.Nd2 dxc4 (80.825.972) 1602 

33/34  0:53   +0.72--  1.Nd2 dxc4 (85.255.175) 1604 

33/44  0:59   +0.62--  1.Nd2 dxc4 (95.398.895) 1612 

33/44  1:07   +0.71++  1.Nd2 (109.677.079) 1625 

33/44  1:08   +0.77    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Nd5 6.Nxd5 exd5 
                       7.Nd6 Bd7 8.Kd2 a5 9.h4 Bc6 10.Nb5 Rc8 
                       11.Rc1 Ne6 12.Bg3 Bb6 13.Nd6 Rd8 
                       14.Ke2 (111.743.656) 1626 

34/35  1:12   +0.70--  1.Nd2 dxc4 (118.693.006) 1628 

34/37  1:35   +0.62--  1.Nd2 dxc4 (155.648.279) 1630 

34/47  1:39   +0.70++  1.Nd2 (162.514.918) 1633 

34/47  1:41   +0.72    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Bd7 6.Kd2 Be7 
                       7.Rc1 Nc6 8.Ke2 Rd8 9.Bc7 Rc8 10.Bg3 Nh5 
                       11.Bd6 Nf6 12.Bxe7 Nxe7 13.Nd6 Rc7 
                       14.Rd1 (164.925.628) 1632 

35/38  1:47   +0.64--  1.Nd2 dxc4 (176.314.947) 1633 

35/41  1:58   +0.57--  1.Nd2 dxc4 (193.125.423) 1635 

35/47  2:07   +0.64++  1.Nd2 (209.181.623) 1643 

35/47  2:16   +0.51    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qc2 Nd5 5.Bg3 Nxc3 6.Qxc3 Qd5 
                       7.Nd2 Be7 8.Bd3 f5 9.e4 Qd4 10.Qxd4 Nxd4 
                       11.Be5 Nc6 12.Bc3 Bd7 13.O-O Rc8 
                       14.Bc4 (224.408.619) 1646 

36/42  2:27   +0.58++  1.Nd2 (244.117.524) 1649 

36/42  2:29   +0.66++  1.Nd2 (245.998.925) 1649 

36/42  2:34   +0.57    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Be2 Nd5 6.Nxd5 exd5 
                       7.Nd6 Ne6 8.b4 Bb6 9.Bg3 d4 10.Rf1 a5 
                       11.b5 dxe3 12.fxe3 Bc5 13.Bf3 Bxa3 
                       14.Nxb7 (254.499.094) 1649 

37/44  2:47   +0.65++  1.Nd2 (277.367.669) 1653 

37/44  2:48   +0.72++  1.Nd2 (278.708.974) 1653 

37/47  3:14   +0.50--  1.Nd2 dxc4 (322.689.215) 1655 

37/47  3:22   +0.67++  1.Nd2 (336.731.888) 1659 

37/47  3:25   +0.61    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Be2 Nd5 6.Nxd5 exd5 
                       7.Nd6 Ne6 8.Bg3 Bxd6 9.Bxd6 Bd7 
                       10.Kd2 Rd8 11.f3 Ba4 12.Be7 Re8 
                       13.Bb4 d4 14.Rc1 (340.794.494) 1659 

38/46  3:35   +0.68++  1.Nd2 (357.043.068) 1659 

38/46  3:46   +0.53--  1.Nd2 dxc4 (376.671.938) 1661 

38/46  3:53   +0.65++  1.Nd2 (387.895.543) 1663 

38/46  3:57   +0.62    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Be7 6.Ke2 b6 
                       7.Bd6 Kf8 8.Rc1 Bd7 9.Bxe7+ Kxe7 
                       10.Ne5 Nc6 11.Nxd7 Kxd7 12.Bb5 Rc8 
                       13.b4 Ke7 14.Bxc6 (396.179.217) 1664 

39/43  4:11   +0.55--  1.Nd2 dxc4 (418.580.509) 1665 

39/43  4:28   +0.62++  1.Nd2 (447.672.669) 1667 

39/43  4:34   +0.58    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Kd2 Be7 6.Be2 Ne8 
                       7.Rc1 f6 8.Bg3 Nf7 9.Ke1 e5 10.e4 Bd7 
                       11.Nd5 Bd8 12.f3 Rc8 13.Kd2 Be6 
                       14.b4 (458.238.969) 1668 

40/48  5:04   +0.65++  1.Nd2 (510.317.006) 1673 

40/48  5:19   +0.50--  1.Nd2 dxc4 (534.777.384) 1673 

40/48  5:35   +0.62++  1.Nd2 (561.418.382) 1671 

40/48  5:54   +0.62    1.Nd2 dxc4 2.Bxc4 Be7 3.Bd3 e5 4.Nc4 Qc7 
                       5.Bg3 Be6 6.Nb5 Qb8 7.Nd4 Qc8 8.Nxe6 Qxe6 
                       9.O-O e4 10.Be2 b5 11.Rxd8+ Nxd8 
                       12.Na5 Rc8 13.Qd2 a6 14.Rd1 (592.559.850) 1671 

41/44  6:48   +0.60    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Be2 Nd5 6.Nxd5 exd5 
                       7.Nd6 Ne6 8.Bg3 Bxd6 9.Bxd6 Bd7 
                       10.f3 Rd8 11.Kd2 Ba4 12.Be7 Re8 
                       13.Bb4 d4 14.Bc4 (683.468.447) 1671 

42/50  7:49   +0.53--  1.Nd2 dxc4 (787.028.538) 1674 

42/50  10:36  +0.60++  1.Be2 (1.069.538.443) 1681 

42/50  11:01  +0.45--  1.Be2 Ne4 (1.112.326.852) 1680 

42/50  11:51  +0.58++  1.Be2 (1.191.719.422) 1674 

42/57  14:36  +0.55    1.Nd2 dxc4 2.Bxc4 Be7 3.O-O Qf5 
                       4.Nde4 Nd5 5.Bg3 Nxc3 6.bxc3 Rxd1 
                       7.Rxd1 e5 8.h4 h6 9.Bd3 Qe6 10.Nd2 Bxa3 
                       11.Nf3 Be7 12.Be4 Bf6 13.Qd3 a6 
                       14.Rb1 (1.467.041.265) 1673 

43/45  15:08  +0.62++  1.Nd2 (1.518.938.142) 1672 

43/47  15:24  +0.70++  1.Nd2 (1.545.496.296) 1672 

43/47  15:50  +0.47--  1.Nd2 dxc4 (1.588.173.168) 1671 

43/47  16:07  +0.64++  1.Nd2 (1.616.103.807) 1671 

43/52  16:22  +0.73    1.Nd2 dxc4 2.Bxc4 Be7 3.O-O Qf5 
                       4.Nde4 Nd5 5.Bg3 Nxc3 6.bxc3 Rxd1 
                       7.Rxd1 e5 8.h4 Be6 9.Bd3 Qh5 10.Ng5 Bxg5 
                       11.hxg5 Qxg5 12.Bxh7+ Kf8 13.Be4 Rc8 
                       14.Qa4 (1.641.405.742) 1671 

44/48  17:37  +0.66--  1.Nd2 dxc4 (1.766.965.784) 1670 

44/48  18:40  +0.58--  1.Nd2 dxc4 (1.867.008.275) 1666 

44/48  19:02  +0.66++  1.Nd2 (1.897.880.530) 1661 

44/53  20:36  +0.47--  1.Nd2 dxc4 (2.034.823.641) 1645 

44/61  21:17  +0.64++  1.Nd2 (2.094.342.244) 1638 

44/61  21:46  +0.47    1.Nd2 dxc4 2.Bxc4 Be7 3.O-O Qf5 
                       4.Nde4 Nd5 5.Bg3 Nxc3 6.bxc3 Rxd1 
                       7.Rxd1 e5 8.Bd3 Qh5 9.Rb1 Bxa3 
                       10.Nd2 Be7 11.Nc4 Rb8 12.Be4 Bd7 
                       13.Bxc6 Bxc6 14.Nxe5 (2.136.151.526) 1635 

45/47  22:33  +0.55++  1.Nd2 (2.204.263.683) 1628 

45/47  22:48  +0.62++  1.Nd2 (2.225.395.701) 1626 

45/51  23:12  +0.73++  1.Nd2 (2.260.396.718) 1623 

45/65  24:08  +0.53    1.Nd2 dxc4 2.Bxc4 Be7 3.O-O Qf5 
                       4.Nde4 Nd5 5.Bg3 Nxc3 6.bxc3 Rxd1 
                       7.Rxd1 e5 8.h4 Be6 9.Bd3 Qh5 10.Ng5 Bxg5 
                       11.hxg5 Rc8 12.Be4 Qxg5 13.Bxh7+ Kf8 
                       14.Be4 (2.349.054.581) 1621 

46/49  25:10  +0.60++  1.Nd2 (2.451.649.089) 1622 

46/53  27:25  +0.48    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Be2 Bd7 6.O-O Nd5 
                       7.Nxd5 exd5 8.Ne5 Be6 9.Rc1 Bb6 
                       10.Kf1 Rc8 11.Rxc8 Bxc8 12.Bg3 Be6 
                       13.Nd3 f6 14.b4 (2.678.712.508) 1628 

47/54  28:56  +0.56++  1.Nd2 (2.829.391.723) 1629 

47/54  29:17  +0.63++  1.Nd2 (2.864.893.623) 1629 

47/54  31:52  +0.53    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 b6 6.Nd6 Bd7 
                       7.Be2 Nd5 8.Nxd5 exd5 9.b4 Bxd6 
                       10.Bxd6 f6 11.Ba6 Bc8 12.Bd3 Nf7 
                       13.Bc7 Bd7 14.Kd2 (3.124.371.102) 1633 

48/48  36:57  +0.45--  1.Nd2 dxc4 (3.577.289.218) 1613 

48/60  38:17  +0.53++  1.Nd2 (3.712.568.891) 1615 

48/60  39:36  +0.53    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 b6 6.Nd6 Bd7 
                       7.Be2 Nd5 8.Nxd5 exd5 9.b4 Bxd6 
                       10.Bxd6 f6 11.Ba6 Bc8 12.Bd3 Nf7 
                       13.Bc7 Bb7 14.Kd2 (3.845.305.175) 1618 

49/65  50:50  +0.45--  1.Nd2 dxc4 (4.989.749.527) 1635 

49/65  51:53  +0.53++  1.Nd2 (5.095.191.456) 1636 

49/65  52:42  +0.46    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Be7 6.Ke2 b6 
                       7.Bd6 Kf8 8.Rc1 Ba6 9.Bxe7+ Kxe7 
                       10.Ne5 Bxd3+ 11.Nxd3 Nc6 12.b4 Rc8 
                       13.b5 Na5 14.Nd5+ (5.176.849.011) 1637 

50/47  54:05  +0.53++  1.Nd2 (5.316.741.149) 1637 

50/50  57:46  +0.57    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Be7 6.Ke2 b6 
                       7.Rd1 Ba6 8.f3 Nb7 9.Kf2 Rd8 10.Ne5 Bxd3 
                       11.Nc6 Rd7 12.Nxe7+ Rxe7 13.Rxd3 Rd7 
                       14.Ke2 (5.691.055.374) 1641 

51/44  62:23  +0.49--  1.Nd2 dxc4 (6.159.548.758) 1645 

51/59  66:45  +0.57++  1.Nd2 (6.615.033.957) 1651 

51/59  71:27  +0.57    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Bd7 6.Ke2 Nd5 
                       7.Nxd5 exd5 8.Nd6 a5 9.Bg3 Bc6 
                       10.Rc1 Ne6 11.Be5 g6 12.Nb5 Bb6 
                       13.Nd4 Nxd4+ 14.Bxd4 (7.096.234.364) 1655 

52/55  76:02  +0.49--  1.Nd2 dxc4 (7.563.789.035) 1657 

52/61  83:44  +0.57++  1.Nd2 (8.359.543.620) 1663 

52/61  93:02  +0.67++  1.Nd2 (9.285.761.050) 1663 

52/67  111:27 +0.50    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Bd7 6.Ke2 Nd5 
                       7.Nxd5 exd5 8.Nd6 a5 9.Rb1 g6 10.Bg3 Kg7 
                       11.Rd1 Bc6 12.Nb5 Ne6 13.Nc7 Nxc7 
                       14.Be5+ (11.097.254.375) 1659 

53/55  113:59 +0.57++  1.Nd2 (11.355.181.610) 1660 

53/57  124:52 +0.48    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Bd7 6.Ke2 Nd5 
                       7.Nxd5 exd5 8.Nd6 a5 9.Rc1 b6 10.Bb5 Ne6 
                       11.Bxd7 Nxf4+ 12.exf4 Bxd6 13.Kf3 Rd8 
                       14.Bb5 (12.454.530.724) 1662 

54/45  133:26 +0.55++  1.Nd2 (13.325.359.690) 1664 

54/45  141:29 +0.54    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Bd7 6.Ke2 Nd5 
                       7.Nxd5 exd5 8.Nd6 a5 9.Rc1 b6 10.Bb5 Ne6 
                       11.Bxd7 Nxf4+ 12.exf4 Bxd6 13.Kf3 Rd8 
                       14.Bb5 (14.143.051.930) 1665 

55/46  155:07 +0.49    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Bd7 6.Ke2 Nd5 
                       7.Nxd5 exd5 8.Nd6 a5 9.Rc1 b6 10.Bb5 Ne6 
                       11.Bxd7 Nxf4+ 12.exf4 Bxd6 13.g3 Rd8 
                       14.Ba4 (15.544.906.377) 1670 

56/51  167:45 +0.57++  1.Nd2 (16.829.725.383) 1672 

56/59  183:28 +0.50    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Bd3 Bd7 6.Ke2 Nd5 
                       7.Nxd5 exd5 8.Nd6 a5 9.Rc1 b6 10.Bb5 Ne6 
                       11.Bxd7 Nxf4+ 12.exf4 Bxd6 13.g3 Rd8 
                       14.Bc6 (18.451.659.543) 1676 

57/59  203:11 +0.57++  1.Nd2 (20.469.953.132) 1679 

57/59  221:12 +0.65++  1.Nd2 (22.294.903.023) 1679 

57/63  265:39 +0.66    1.Nd2 dxc4 2.Nxc4 Rxd1+ 3.Qxd1 Qd8 
                       4.Qxd8+ Nxd8 5.Be2 Bd7 6.O-O Nd5 
                       7.Nxd5 exd5 8.Rd1 Bc6 9.Bd6 Bxd6 
                       10.Nxd6 Ne6 11.Nf5 Kf8 12.Bf3 g6 
                       13.Nd4 Nxd4 14.Rxd4 (26.848.625.680) 1684 

58/58  297:50 +0.58--  1.Nd2 dxc4 (30.197.002.017) 1689 

58/69  336:59 +0.51--  1.Nd2 dxc4 (34.306.010.319) 1696 

58/69  348:35 +0.58++  1.Nd2 (35.477.797.502) 1696 

58/74  442:02 +0.73++  1.Nd2 (44.853.445.759) 1691 

58/74  455:51 +0.62    1.Nd2 dxc4 2.Bxc4 Be7 3.Bd3 e5 4.Nc4 Qc7 
                       5.Nb5 Qb8 6.Bg3 Bg4 7.f3 Be6 8.Nd4 Nxd4 
                       9.exd4 Qc8 10.Bxe5 Nd7 11.Bf4 g6 
                       12.O-O Nf6 13.Be5 b5 14.Ne3 (46.303.373.497) 1692 

59/49  471:29 +0.69++  1.Nd2 (47.897.992.838) 1693 

59/59  501:34 +0.67    1.Nd2 dxc4 2.Bxc4 Be7 3.Bd3 e5 4.Nc4 Qc7 
                       5.Bg3 Bg4 6.f3 Be6 7.Nb5 Qb8 8.Nd4 Nxd4 
                       9.exd4 Qc8 10.Bxe5 Nd7 11.Bg3 g6 
                       12.Bf2 Nb6 13.Nxb6 Qxc2 14.Bxc2 (50.961.100.391) 1693 

60/58  533:07 +0.60--  1.Nd2 dxc4 (54.157.529.398) 1693 
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan

BeyondCritics
Posts: 353
Joined: Sat May 05, 2012 12:48 pm
Location: Bergheim

Re: The "Oh shit..." moment.

Post by BeyondCritics » Tue Nov 13, 2018 9:28 am

Nope, this is still not the right answer.
Hint: Imagine you are Magnus Carlsen and think like a chess player would. Then it is not so difficult...:wink:

User avatar
Eelco de Groot
Posts: 4168
Joined: Sun Mar 12, 2006 1:40 am
Location: Groningen

Re: The "Oh shit..." moment.

Post by Eelco de Groot » Tue Nov 13, 2018 10:00 am

I'm afraid I have forgotten to think like a chessplayer... But Kaissa luckily also can think of a more critical line for me, after 1.Nd2 It is not with dxc4, but she thinks the frightening 1..d4 would be at least as good as that, and now White will have to stay very cool and leave the Knight en prise. I imagine that Magnus would not like that? After that



Engine: Kaissa IV (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

29 1:38 +0.66 2.Nb3 Qb6 3.Na4 Bb4+ 4.axb4 Qxb4+
5.Nd2 Qa5 6.Qb3 e5 7.Bg5 Nb4 8.Bxf6 gxf6
9.exd4 exd4 10.Be2 Re8 11.Qg3+ Kf8
12.O-O Rxe2 13.Qd6+ Kg7 14.Nc5 Re5
15.Ncb3 (164.068.557) 1664

29 1:38 -1.83 2.Ncb1 Ng4 3.b4 Bxb4 4.axb4 Nxb4
5.Qb2 e5 6.Bg5 f6 7.Be2 d3 8.Bxg4 Nc2+
9.Kf1 Bxg4 10.Bxf6 gxf6 11.Rc1 Qb4
12.Qxb4 Nxb4 13.Nc3 Be6 14.f3 a5
15.Kf2 (164.068.557) 1664

29 1:38 -1.96 2.Nce4 Nxe4 3.Qxe4 e5 4.Bg5 f6 5.b4 Qxa3
6.bxc5 fxg5 7.Be2 g6 8.exd4 Bf5
9.Qf3 Nxd4 10.Qxa3 Nc2+ 11.Kf1 Nxa3
12.Nf3 Rxd1+ 13.Bxd1 Rc8 14.Nxg5 h6
15.Nf3 (164.068.557) 1664

29 1:38 -2.09 2.exd4 Nxd4 3.Qb1 e5 4.Bg5 Bf5 5.Bd3 Bxd3
6.Qxd3 Ne6 7.Qg3 Nxg5 8.Qxg5 Bxa3
9.O-O h6 10.Qh4 Bxb2 11.Nce4 Nxe4
12.Nxe4 Rxd1 13.Rxd1 Qa4 14.Rb1 Qc2
15.Rf1 (164.068.557) 1664

28 1:38 -2.06 2.Na4 Be7 3.c5 b5 4.cxb6 Bb7 5.Qb3 dxe3
6.Bxe3 Nd4 7.Bxd4 Rxd4 8.Nc3 Qe5+
9.Be2 Bxg2 10.Rg1 Rg4 11.Qb5 Bc5
12.Rxg2 Rxg2 13.Nf3 Qh5 14.bxa7 Bxa7
15.Qxh5 (164.068.557) 1664

After

1. Nd2 d4 2. Nb3 Qb6 3. Na4 Bb4+ {!?} 4. axb4 Qxb4+ *



Engine: Kaissa IV (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

28 0:31 +0.45 5.Nd2 Qa5 6.Qb3 e5 7.Bg5 Nb4 8.Bxf6 gxf6
9.Be2 Bd7 10.Nc3 dxc3 11.bxc3 Na6
12.Ne4 Kg7 13.O-O Qc7 14.Ng3 Nc5
15.Nh5+ Kh8 16.Qc2 f5 17.Nf6 e4
18.Rd5 (55.196.720) 1755

28 0:31 -0.06 5.Nc3 dxc3 6.Rxd8+ Nxd8 7.bxc3 Qe7
8.Be5 Nc6 9.Bxf6 gxf6 10.Nd4 a5
11.Be2 Nxd4 12.exd4 f5 13.O-O a4
14.Rb1 e5 15.c5 a3 16.Bc4 Be6
17.Bxe6 (55.196.720) 1755

28 0:31 -0.44 5.Qd2 Qxb3 6.Nc5 Qb6 7.Na4 Qb4
8.Qxb4 Nxb4 9.Nc5 Re8 10.exd4 Nc2+
11.Ke2 Nxd4+ 12.Rxd4 e5 13.Bxe5 Rxe5+
14.Kd1 Bf5 15.Nd3 Ra5 16.f3 Re8
17.Kd2 Ra2 18.Kc3 (55.196.720) 1755

28 0:31 -0.87 5.Rd2 e5 6.Bg5 Qxa4 7.exd4 Nb4 8.Qd1 Re8
9.Bxf6 exd4+ 10.Be2 d3 11.Bc3 dxe2
12.Rxe2 Na2 13.Nd4 Nxc3 14.bxc3 Rxe2+
15.Qxe2 Be6 16.Nxe6 Qa1+ 17.Qd1 Qxc3+
18.Qd2 (55.196.720) 1755

27 0:31 -2.92 5.Ke2 Qxa4 6.exd4 e5 7.Bxe5 Be6
8.Na1 Qa6 9.Bxf6 gxf6 10.Ke3 Rxd4
11.Rxd4 Nxd4 12.Kxd4 Rd8+ 13.Ke3 Qxa1
14.Qc3 Rd1 15.Qxf6 h6 16.Kf3 Rxf1
17.Qd8+ Kg7 18.Rxf1 (55.196.720) 1755
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan

BeyondCritics
Posts: 353
Joined: Sat May 05, 2012 12:48 pm
Location: Bergheim

Re: The "Oh shit..." moment.

Post by BeyondCritics » Tue Nov 13, 2018 10:21 am

Congratulation Eelco, you have correctly shown, that 11..d4!? might be a viable alternative.
I enjoyed it very much, when suddenly 11...d4!? emerged, so i decided to pose this puzzle so everyone had a chance to experience that too.
As promised, i post some preliminary lines:



Note that the pgn-viewer incorrectly renders "+=" as "=".

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