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AlphaZero (Computer) vs Stockfish (Computer)
AlphaZero - Stockfish Match (2018), London ENG, Jan-18
Semi-Slav Defense: General (D43)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Dec-17-18  reisanibal: This was an easy draw, but then AlphaZero was bored and tried to do something.
Jan-17-19
Premium Chessgames Member
  Penguincw: Here's to Stockfish's only black win over AlphaZero (in the database).
Nov-11-19  Thief: The sequence <15... Kg7, 16... Nh5, 17... Kg8, 18... Ng7> is really something.
Nov-11-19
Premium Chessgames Member
  OhioChessFan: Round about move 70, I realized AZ thought he was better! Any decent club player would have never given up the d5 square to Black's King. I'd have played 79...Kd5 in a heartbeat.
Nov-11-19  WorstPlayerEver: 80. Nc1 is a blunder, the Knight has to stay in touch with c3

80. Kc3=

Therefore it was simpler (logical) to keep the Knight at d1 in the first place; AO and SF looking for things which are not there. Because SF 6 secs did not mind either 80. Nc1 until 81... Bf1! Zugzwang. A Knight at a2 also gives Black an option of Bc4+, which limits White's control over b3 (Kb3), because of Bxa2.

PS Now SF gives 80. Kc3 as well, after I influenced their digital stratosphere :)

________

79. Nd1


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Nov-11-19  WorstPlayerEver: PS hmm.. corr: the Knight does not have to stay in touch with c3. Control over c3 is sufficient on its own. 79. Na2 Kd5 implicates a trap.

80. Kc3 Bc4 81. Nc1 Bf1 now White wins


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Dec-07-19
Premium Chessgames Member
  Fusilli: <Thief: The sequence <15... Kg7, 16... Nh5, 17... Kg8, 18... Ng7> is really something.>

Yes! And it has its logic. When Stockfish played 15...Kg7 (not sure why), AZ responded with 16.Na4 and that changes a lot of things, because Black no longer has Nxc3 if White plays f3, which is a threat right now. So 16...Nh5 responds to the threat of f3. After 17.Bh2, White may follow with 18.g4 Nf6 19.f3 Ng5 20.Qg2 and it looks like White would have a comfortable expansive kingside position. So, 17...Kg8 frees up g7 for the h5 knight so that Black can have more defensive options. Of course the computers did all the calculations, and I have no idea what they'd look like, but I think this is the general strategic logic of the position.

Apr-03-20
Premium Chessgames Member
  maxi: The position was even, then A0 played the suicidal 80.Nc1, which allows the invasion by the Black King. On the other hand White promotes first and has an extra Queen for full five moves. Perhaps this fact confused A0 and made it think that it had an advantage in the variation, while in fact White is lost. Interesting game <AylerKupp>, don't you think?
Apr-03-20  Carrots and Pizza: 14...g6 is the kind of move that I probably wouldn't even have considered, let alone played.
Apr-14-20
Premium Chessgames Member
  maxi: <Carrots and Pizza> It's fascinating how SF builds the Pawn chain on dark squares after 14...g6

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