A Stockfish that tries to lose every game of chess

[Uri Blass]

1)I cannot download Andworst
I see
"The file you requested has been deleted"

2)If Andworst allow me to get a big material advantage then it is possible to force it to win against me later.

Basically I need only to get a situation when the opponent has king and 2 connected pawns and prevent the king to move so I force the pawns to beat me.

[CMCanavessi]

1)I cannot download Andworst

Try here: https://easyupload.io/t5vvjs

[Uri Blass]

I did not play very well in order to lose and the opponent missed draw chances by sacrificing the pawns but still could lose against it.
I understood during the game that the opponent prefer to allow me to mate in 1 and not to sacrifice the last pawns so I did not try to play the best moves to force a loss.

for example 57...Kg4 was a mistake if the target is to lose and better was 57...g1Q+ but I knew black will not play it because it is not mate in the next move.
practically I was lucky that black did not try 57...g1N that also lose in one move and I am not sure if I can win.

I did not think a lot of time in the game and with more thinking I guess I could play better in order to lose.

Edit:I think that it is possible also to force a loss only against a single pawn when the idea is to have bishop near the king when the pawn gives mate.

[pgn][Event "Computer chess game"]
[Site "DESKTOP-7QE6S12"]
[Date "2021.07.04"]
[Round "?"]
[White "àåøé"]
[Black "Andworst-0.3"]
[Result "0-1"]
[BlackElo "2000"]
[ECO "B00"]
[Opening "King's Pawn"]
[Time "06:35:44"]
[Variation "Fred"]
[WhiteElo "2400"]
[TimeControl "600+0"]
[Termination "normal"]
[PlyCount "138"]
[WhiteType "human"]
[BlackType "program"]

1. e4 f5 {(f7-f5 e4xf5 Ng8-f6 Bf1-e2 d7-d6 Be2-h5+ Nf6xh5 Qd1xh5+ Ke8-d7
Ng1-f3 c7-c6 Nf3-g5 Qd8-e8 Qh5-h3 Kd7-c7 d2-d4 h7-h6 O-O Bc8xf5 Qh3xf5
h6xg5 Bc1xg5 e7-e5 d4xe5 Qe8xe5 Qf5xe5 d6xe5 Nb1-c3 Nb8-d7 Nc3-e4 Nd7-c5
Rf1-e1 Ra8-e8 Ra1-d1 Bf8-e7 Bg5xe7) -1.47/26 28} 2. exf5 g5 {(g7-g5) -M1/1}
3. b3 a6 {(a7-a6) -M1/1} 4. Bb2 a5 {(a6-a5) -M1/1 0} 5. Bxh8 a4 {(a5-a4)
-M1/1} 6. bxa4 Rxa4 {(Ra8xa4 Nb1-c3) -M1/1 0 Black resigns} 7. c3 b6
{(b7-b6) -M1/1 0 Black resigns} 8. Qxa4 Bg7 {(Bf8-g7) -16.42/27 42} 9. Bxg7
Nh6 {(Ng8-h6) -23.66/26 37} 10. Bxh6 Na6 {(Nb8-a6 Bf1-e2 e7-e6 Be2-h5+
Ke8-e7 Bh6xg5+ Ke7-d6 Bg5xd8 Na6-c5 Qa4-f4+ e6-e5 Qf4-h4 Kd6-c6 Bh5-f3+
e5-e4 Bf3xe4+ d7-d5 Qh4-f6+ Kc6-b7 Be4xd5+ Kb7-b8 Qf6-c6 Bc8-b7 Qc6xc7+
Kb8-a8 Bd5xb7+ Nc5xb7 Nb1-a3 Nb7-d6 Qc7xd6 h7-h6 Qd6xb6 h6-h5 Qb6-a6+
Ka8-b8) -M18/24 35} 11. Qg4 b5 {(b6-b5) -M1/1 0} 12. Bxb5 c6 {(c7-c6) -M1/1
0} 13. Bxa6 Bxa6 {(Bc8xa6 Bh6xg5 Ke8-f8) -M1/1 0} 14. Ne2 c5 {(c6-c5) -M1/1
0 Black resigns} 15. O-O c4 {(c5-c4) -M1/1 0 Black resigns} 16. Nd4 Bb5
{(Ba6-b5) -M1/1 Black resigns} 17. Na3 Ba4 {(Bb5-a4) -M1/1 0 Black resigns}
18. Nxc4 Bc2 {(Ba4-c2) -M1/1 0 Black resigns} 19. Ne3 Bb1 {(Bc2-b1) -M1/1
Black resigns} 20. Bg7 h6 {(h7-h6) -M1/1 Black resigns} 21. Nc6 h5 {(h6-h5)
-M1/1 0 Black resigns} 22. Qa4 Qa8 {(Qd8-a8 Qa4xa8+ Ke8-f7) -M2/127 0 Black
resigns} 23. Qxa8+ Kf7 {(Ke8-f7) -M1/1 0 Black resigns} 24. Raxb1 e6
{(e7-e6) -M1/1 0 Black resigns} 25. f6 g4 {(g5-g4) -M1/1 0 Black resigns}
26. g3 h4 {(h5-h4) -M1/1 Black resigns} 27. Nd8+ Ke8 {(Kf7-e8 f6-f7+
Ke8-e7) -M2/127 0 Black resigns} 28. f7+ Ke7 {(Ke8-e7) -M1/1 0 Black
resigns} 29. Nd5+ Kd6 {(Ke7-d6) -M1/1 Black resigns} 30. Qa6+ Kxd5 {(Kd6xd5
Qa6-d3+ Kd5-c5) -M2/127 0 Black resigns} 31. Nxe6 d6 {(d7-d6 f7-f8Q Kd5xe6)
-M2/127 0 Black resigns} 32. h3 Ke4 {(Kd5-e4 Qa6-c4+ Ke4-f5) -M2/127 0
Black resigns} 33. Qc4+ Kf5 {(Ke4-f5) -M1/1 0 Black resigns} 34. f8=Q+ Kg6
{(Kf5-g6 Qc4-e4+ Kg6-h5) -M2/4 0 Black resigns} 35. Nd8 Kg5 {(Kg6-g5) -M1/1
Black resigns} 36. Qcf7 d5 {(d6-d5) -M1/1 0 Black resigns} 37. Qxd5+ Kg6
{(Kg5-g6) -M1/1 0 Black resigns} 38. Qdf7+ Kh7 {(Kg6-h7) -M1/1 0 Black
resigns} 39. Q7e7 gxh3 {(g4xh3) -M1/1 0 Black resigns} 40. f3 hxg3 {(h4xg3)
-M1/1 0 Black resigns} 41. Qh8+ Kg6 {(Kh7-g6) -M1/1 0 Black resigns} 42.
Qe6+ Kg5 {(Kg6-g5) -M1/1 Black resigns} 43. Bf6+ Kg6 {(Kg5-g6) -M1/1 0
Black resigns} 44. f4 g2 {(g3-g2) -M1/1 0 Black resigns} 45. Qhe8+ Kh7
{(Kg6-h7) -M1/1 0 Black resigns} 46. Q6d7+ Kh6 {(Kh7-h6) -M1/1 0 Black
resigns} 47. Qf8+ Kh5 {(Kh6-h5) -M1/1 0 Black resigns} 48. Qh7+ Kg4
{(Kh5-g4) -M1/1 0 Black resigns} 49. Qhg7+ Kh5 {(Kg4-h5) -M1/1 0 Black
resigns} 50. Bd4 Kh4 {(Kh5-h4) -M1/1 0 Black resigns} 51. Qh6+ Kg4
{(Kh4-g4) -M1/1 0 Black resigns} 52. Rb3 Kg3 {(Kg4-g3) -M1/1 0 Black
resigns} 53. Re1 Kf3 {(Kg3-f3) -M1/1 Black resigns} 54. c4+ Kg4 {(Kf3-g4)
-M1/1 Black resigns} 55. Qg6+ Kh4 {(Kg4-h4) -M1/1 Black resigns} 56. Qgf6+
Kh5 {(Kh4-h5) -M1/1 0 Black resigns} 57. Kh2 Kg4 {(Kh5-g4) -M1/1 0 Black
resigns} 58. Rg1 Kh5 {(Kg4-h5) -M1/1 0 Black resigns} 59. Qe5+ Kg6
{(Kh5-g6) -M1/1 Black resigns} 60. Qe6+ Kh7 {(Kg6-h7) -M1/1 Black resigns}
61. Qd7+ Kg6 {(Kh7-g6) -M1/1 Black resigns} 62. Qfd6+ Kh5 {(Kg6-h5) -M1/1
Black resigns} 63. Re1 Kh4 {(Kh5-h4) -M1/1 0 Black resigns} 64. Kg1 Kh5
{(Kh4-h5) -M1/1 Black resigns} 65. Qf5+ Kh4 {(Kh5-h4) -M1/1 Black resigns}
66. Rb7 Kg3 {(Kh4-g3 Bd4-f2+ Kg3-f3) -M2/123 0 Black resigns} 67. Bf6 Kf3
{(Kg3-f3) -M1/1 0 Black resigns} 68. Rb6 Kg3 {(Kf3-g3) -M1/1 0 Black
resigns} 69. Qdd5 h2# 0-1
[/pgn]

[hgm]

Well, you can force a random mover to beat you that easily because it has no chess knowledge so you can make it do whatever you want... but with Andworst or a chess engine programmed to try to lose, it won't fall into those easy traps.

The problem is that Andworst and Badfish are not programmed for trying to get checkmated. The are programmed for getting a very negative evaluation. Which is a very poor strategy for getting yourself checkmated. They are programmed to strive for doing themselves in.

[jefk]

well i wonder if they ever heard of the chess variant
'losing chess' (different because capturing is obligatory,
and it's solved for White, losing after 1.e3). But in
this badfish variant even after 1.e3 it will be
a draw i predict (eg bf vs bf).