stockfish fixed depth 2 against Leela easy mode

[Uri Blass]

[Event "PGN Import"]
[Site "?"]
[Date "?"]
[Round "?"]
[White "Stockfish depth 2"]
[Black "Leela ID 246 easy mode"]
[Result "*"]
[ECO "B21"]
[Opening "Sicilian"]
[Variation "Smith-Morra, 1.e4 c5 2.d4 cxd4"]
[Termination "unterminated"]
[PlyCount "65"]
[WhiteType "human"]
[BlackType "human"]

1. e4 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qc4 Nf6 5. Nc3 e6 6. Nf3 d5 7. exd5 exd5
8. Qe2+ Be7 9. h4 O-O 10. Bf4 Bb4 11. a3 Bxc3+ 12. bxc3 Re8 13. Be3 Bg4 14.
Qd3 Bxf3 15. gxf3 Ne5 16. Qf5 Qa5 17. Kd2 Rac8 18. Bd4 Nc6 19. Bxf6 gxf6
20. Qxf6 d4 21. Rg1+ Kf8 22. Qh8+ Ke7 23. Re1+ Kd6 24. Qf6+ Kc7 25. Qxf7+
Kb8 26. Rxe8 Qxc3+ 27. Kd1 Qa1+ 28. Ke2 d3+ 29. Kd2 dxc2 30. Rxc8+ Kxc8 31.
Rg8+ Nd8 32. Bh3+ Kb8 33. Rxd8# *


[pgn][Event "PGN Import"]
[Site "?"]
[Date "?"]
[Round "?"]
[White "Leela ID 246 easy mode"]
[Black "Stockfish depth 2"]
[Result "*"]
[ECO "B01"]
[Opening "Scandinavian"]
[Variation "2...Qxd5 3.Nc3"]
[Termination "unterminated"]
[PlyCount "106"]
[WhiteType "human"]
[BlackType "human"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd4 4. Nf3 Qb4 5. Nd5 Qe4+ 6. Ne3 Nf6 7. d4
Nc6 8. Bd3 Qf4 9. d5 Nb4 10. Bb5+ c6 11. dxc6 bxc6 12. c3 cxb5 13. cxb4
Qxb4+ 14. Bd2 Qxb2 15. O-O Ne4 16. Nd5 Rb8 17. Bf4 Rb7 18. Rc1 Bg4 19. Nc7+
Rxc7 20. Rxc7 Nc3 21. Qd3 Ne2+ 22. Kh1 Nxf4 23. Qe4 Bxf3 24. Qxf3 f5 25.
Qxf4 g6 26. Rd1 Kf7 27. Qe3 a6 28. h3 Qxa2 29. Qe5 Rg8 30. Rdd7 Qb1+ 31.
Kh2 Qb4 32. Qd5+ Kg7 33. Qe5+ Kh6 34. Qe3+ f4 35. Qe6 Rh8 36. Qe5 Bg7 37.
Rxe7 Bxe5 38. Rxe5 f3 39. g4 Qf4+ 40. Kh1 Qxe5 41. Rc1 Qb2 42. Rf1 Qc2 43.
Kh2 b4 44. Kg3 Qd3 45. Re1 a5 46. h4 a4 47. Re7 Qd6+ 48. Kxf3 Qxe7 49. Kg3
Rf8 50. f4 Qe3+ 51. Kg2 Rxf4 52. Kh2 Rf2+ 53. Kg1 Qe1# *[/pgn]


Note that I was very surprised by 37.Rxe7 in the second game and I wonder how Leela could miss a simple capture of the queen with one move.

[frankp]

Just to check I understand this: it is SF at root depth = 2 play + Qsearch versus leela at 1 playout (playing the 'policy head move')?

Not sure how to interpret the result except that SF is stronger (which is known) and even stronger when searching a lot deeper than leela?