Alphazero vs. Stockfish (1-0)

RJF's Avatar


28 May, 2018 11:15 AM

Game Alphazero vs. Stockfish (Queen's Indian, 60 Moves).
There is the following problem:
After 42: h6, the continuation in the match was

42. (h6) Nc7 43. Rd6 Ne6 44. Bb3 Qxe5 45. Rd5 Qh8 46. Qb4 Nc5 47. Rxc5

I tried different analyses with Stockfish 9 (Arena GUI) here
a) 42. h6 Nc7, 43. Rd6 Ne6, 44. Rd5 Nc7
so, only 6 moves (56 ply) (and Stockfish did not find 44. Bb3)
56 ply, 0,00

however, after 42. ..Nc7, Stockfish evaluates as:
43. Rd6 Ne6 44. Bb3 Qxe5 45. Rd5 Qh8 46. Qb4 Nc5 47. Qf4
50 ply, 0,29
(this corresponds to the match for 8 ply, and 44. Bb3 is found)

A second analysis is:
42. h6 Rc7, 43. Rd6 Ne6, 44. Rd5 Kf8, …
evaluation 0,00 (56 ply) (again, 44. Bb3 not found)

When evaluating 2 lines, 44 ..Kf8 is found and shows an evaluation of 0,00:
42. (h6) Kf8, 43. Bc2 Qg4, 44. Ra3 Ng5, …
evaluation: 0,00 (56 ply)

This line remains around 0,00 so the game seems drawish here.

There seems to be an error/problem here with the engine (the kind of 3fold repetition)

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