[Oldies] What's the speed of a recent SF on a 80486-33 MHz ?

[Paloma]

Works for me every time last weeks but suddenly not

http://downforeveryoneorjustme.com/ says it's just you

Win 7, FF 49.0.1 and IE 11 too

[syzygy]

I have run sf6 benchmark on a MIPS 4kec cpu, 150 Mhz. This device is very close to a 486/50 for chess, however I used a modern compiler, which I assume you could get working on a 486, but it wouldn't be fun.

But luckily the compilation does not need to be done on a 486. Just compile with gcc -m32 -march=i486. (I tried this myself, but some header files required for 32-bit compilation seem to be missing. Should not be difficult to get it working though.)

[bnemias]

I have run sf6 benchmark on a MIPS 4kec cpu, 150 Mhz. This device is very close to a 486/50 for chess, however I used a modern compiler, which I assume you could get working on a 486, but it wouldn't be fun.

But luckily the compilation does not need to be done on a 486. Just compile with gcc -m32 -march=i486. (I tried this myself, but some header files required for 32-bit compilation seem to be missing. Should not be difficult to get it working though.)

It still might be a pain-- need a 486 compatible distro. Current ones are i686 for 32-bit. Also, you need to statically link everything, and thus all the linked stuff must be 486 compatible as well.

You could try Windows, but that has its own set of issues. You are going to play hell trying to get a binary that works on anything older than Win2000. And you need to run NT4 or earlier because you will not be able to put more than 32MB on a 486 box.

Not that I can test it anyway-- though I have at least 32MB memory for a 486 era machine, I don't have any chip nor mobo. I might have a 5 pin DIN for the keyboard.. not sure. Sadly, my slowest [desktop] box right now is 1.2 Ghz PIII. my ancient P-90 gave up the ghost last year, and also my 440BX board with a PII-350. Oh well, probably for the best that those things finally died.

[hammerklavier]

In Sedat Chess Benchmark Page, I add entry in Pentium II 133Mhz at 6.000 nodes/sec (with cache disable, is similar to an 486 at 66Mhz with cache enable). Curiosly at 30 sec per mov ( aprox 180.000 nodes) is soo strong Stockfish 7 ! Scale at depth 12 ! in opening . 2500/2600 elo guarantee! In a match with Genius Android 30sec, Stockfish win all the games with 30sec /mov at 6k nds/sec (180.000 nds/aprox)

[Eelco de Groot]

I had a 386 at 25 MHz. With Windows 95. It worked, but not very fast. I put it in the hallway about ten years ago. Finally had enough of it. It was not used for at least 7 years I think. Probably longer. Still, somebody grabbed the thing within ten minutes after I put it there. So I did not have to dispose of it. Very poor neighbours. I don't know if they ever got the thing working, because the monitor needed at least fifteen minutes warm up time. I guess they must have thought it was broke. Never got the chance to wipe the harddisk, I had not expected somebody would take the thing so quickly. Oh well, you did need a bit of expertise to get it started because of the monitor and the modem was gone already.


Regarding Gustavo's example, with 30 seconds per move that Pentium is about as strong as Stockfish in the Fishtest framework playing STC Short Time Control games. 10 seconds per game plus 0.1 seconds bonus per move. Very roughly the same I think. 12 ply, that sounds about right, maybe just a little more. So Stockfish is trained to do very well with that timecontrol

[MikeB]

The question arose in the TCEC chat.

Numbers for 25 or 50 MHz is valid too !

Real numbers would be very nice.
Close approximations would be already informative ...


Second question : what would be the rating of a strong engine (in 2016) on such computer ?

Thanks !

Added a new UCI - parameter labeled "486-DX33" a uci setting that takes value from 1-100, a setting of 1 would tell the engine it has only 1/120th of the normal calculated time, the time, a setting of 100 would tell the engine that it only has 1/12000th the time. The ideas that you would enter the SF bench nps with 8 == 800,000 nps, 10 = 1,000,000 nps second and it would slow Crafty down to a 486-DX running at 33 Mhz . This is not meant for micro time usage which might crash the exe. Use 1 min 1 sec or slower time control

The games bellow were run at the highest setting of 100.

[pgn][Event "Computer Chess Game"]
[Site "Mac-Pro.local"]
[Date "2016.10.06"]
[Round "-"]
[White "Stockfish 100616-12y"]
[Black "Mephisto Dallas 32 bit (emulation)"]
[Result "1-0"]
[TimeControl "60+1"]
[Annotator "1. +0.07"]

1. d4 {+0.07/8} d5 {+0.00/1 0.7} 2. c4 {+0.35/8 0.1} dxc4 {+0.00/1 0.2} 3.
Nf3 {+0.29/8 0.1} c6 {+0.00/1 0.2} 4. e3 {+0.38/9 0.1} Bg4 {+0.00/1 0.2} 5.
Bxc4 {+1.06/7 0.1} e6 {+0.00/1 0.2} 6. O-O {+1.25/7 0.1} Bd6 {-0.60/1 2.1}
7. e4 {+1.50/9 0.1} Nd7 {-0.20/1 2.1} 8. Nc3 {+1.12/9 0.2} Qc7
{-0.36/1 2.0} 9. e5 {+1.80/7 0.1} Be7 {-0.55/1 2.0} 10. h3 {+1.39/9 0.1}
Bf5 {-0.36/1 2.0} 11. Bf4 {+1.54/8 0.1} Nb6 {-0.24/1 1.9} 12. Bb3
{+1.48/10 0.1} O-O-O {-0.36/1 1.9} 13. a4 {+1.64/9 0.1} h5 {-0.68/1 1.9}
14. a5 {+2.10/9 0.1} Nd5 {-1.36/1 1.9} 15. Nxd5 {+1.91/8 0.2} exd5
{-1.40/1 1.9} 16. a6 {+1.90/7 0.1} h4 {-1.50/1 1.8} 17. axb7+ {+3.02/6 0.1}
Qxb7 {-1.92/1 1.8} 18. Rc1 {+2.91/9 0.1} Qb6 {-1.92/1 1.8} 19. Ba4
{+5.25/9 0.1} c5 {-2.08/1 1.8} 20. dxc5 {+5.15/8 0.1} Qxb2 {-2.12/1 1.7}
21. Nd4 {+7.45/9 0.1} g6 {-3.60/1 1.7} 22. c6 {+10.31/8 0.1} Qb4
{-2.60/1 1.7} 23. c7 {+16.64/6 0.1} Rf8 {-5.45/1 1.7} 24. Bb5
{+10.18/9 0.1} Bc5 {-2.55/1 1.7} 25. Be3 {+10.22/7 0.2} Be4 {-3.45/1 1.6}
26. Ba6+ {+12.35/6 0.2} Kd7 {-6.60/1 1.6} 27. Nc6 {+13.58/8 0.1} Qb2
{-8.88/1 1.6} 28. Bxc5 {+16.56/6 0.1} Rc8 {-9.96/1 1.6} 29. Bd4
{+16.89/6 0.1} Qa3 {-9.99/1 1.6} 30. Bxc8+ {+16.93/9 0.1} Kxc7
{-9.99/1 1.5} 31. Nxa7+ {+18.08/7 0.1} Kb8 {-9.99/1 1.6} 32. Ra1
{+20.83/8 0.1} Qd3 {-9.99/1 1.5} 33. Qa4 {+22.94/6 0.1} g5 {+0.00/1 1.5}
34. Qb4+ {+1000.03/2 0.1} Qb5 {+0.00/1 0.2} 35. Qxb5+ {+1000.02/1 0.2} Ka8
{+0.00/1 0.2} 36. Qb7# {+1000.01/1 0.1}
{White mates} 1-0[/pgn]

[pgn][Event "Computer Chess Game"]
[Site "Mac-Pro.local"]
[Date "2016.10.06"]
[Round "-"]
[White "Stockfish 100616-12y"]
[Black "MM 5 (emulation)"]
[Result "1-0"]
[TimeControl "60+1"]
[Annotator "1. +0.07 3... -0.03"]

1. d4 {+0.07/8} Nf6 {+0.00/1 0.4} 2. Nf3 {+0.07/8 0.2} d5 {+0.00/1 0.1} 3.
e3 {+0.19/7 0.1} Bg4 {-0.03/6 2.3} 4. Bd3 {+0.48/7 0.1} Nc6 {+0.11/6 2.3}
5. Bb5 {+0.25/9 0.1} e6 {+0.09/6 2.2} 6. c4 {-0.33/11 0.1} dxc4 {+0.10/5 4}
7. O-O {-0.20/7 0.1} Bb4 {+0.17/5 2.1} 8. Qa4 {+0.24/6 0.2} Bxf3
{-0.31/5 2.1} 9. gxf3 {+0.34/7 0.1} Bd6 {-0.23/5 4} 10. Bxc6+ {-0.15/8 0.1}
bxc6 {-0.34/7 1.9} 11. Qxc6+ {-0.02/8 0.1} Nd7 {-0.28/6 1.9} 12. Nd2
{+0.34/9 0.1} Qg5+ {-0.13/6 1.9} 13. Kh1 {+0.41/1 0.1} Qh5 {+0.26/6 1.9}
14. f4 {-0.56/10 0.1} Qd5+ {+0.27/7 1.8} 15. Qxd5 {-0.56/7 0.1} exd5
{+0.27/7 1.8} 16. e4 {-0.83/9 0.1} dxe4 {+0.26/6 1.8} 17. Nxc4
{-0.40/7 0.1} f5 {+0.40/6 1.8} 18. b3 {-0.04/8 0.1} Bb4 {+0.51/6 1.7} 19.
Bb2 {+0.08/7 0.1} O-O {+0.50/6 1.7} 20. Rfc1 {-0.22/10 0.1} Nb6
{+0.39/6 1.7} 21. Ba3 {-0.41/10 0.2} Bxa3 {+0.40/7 1.7} 22. Nxa3
{-0.47/9 0.1} Nd5 {+0.27/6 1.7} 23. Nb5 {-0.68/9 0.1} Rf7 {+0.12/6 1.6} 24.
Rc5 {-1.02/9 0.1} Nxf4 {+0.03/6 1.6} 25. Rc4 {-0.93/8 0.1} Rd8
{+0.07/6 1.6} 26. Nxa7 {-0.77/8 0.1} Nd3 {+0.03/6 1.6} 27. Nc6
{-0.52/9 0.1} Re8 {+0.10/6 1.6} 28. Ne5 {-0.47/8 0.1} Nxf2+ {+0.68/7 1.6}
29. Kg1 {+0.77/9 0.1} Nh3+ {+1.05/7 1.5} 30. Kg2 {+0.47/10 0.1} Nf4+
{+1.16/7 1.5} 31. Kg3 {+0.56/10 0.1} Nd5 {+0.58/6 1.5} 32. Nxf7
{+0.92/8 0.1} f4+ {+0.67/7 1.5} 33. Kf2 {+0.83/10 0.1} Kxf7 {+0.34/7 1.5}
34. Rc5 {+1.32/9 0.1} Ke6 {+0.25/6 1.5} 35. Rg1 {+1.92/7 0.1} e3+
{+0.22/6 1.5} 36. Ke2 {+1.33/10 0.1} Rf8 {-0.09/5 1.4} 37. Kf3
{+1.79/8 0.1} g6 {-0.26/6 1.4} 38. Rg5 {+1.95/8 0.1} Rf5 {-0.79/6 1.4} 39.
Rxf5 {+2.87/8 0.1} gxf5 {-1.18/7 1.4} 40. a4 {+2.99/8 0.1} Kd6
{-1.34/7 1.4} 41. a5 {+3.08/8 0.1} c6 {-1.52/7 1.4} 42. a6 {+3.67/10 0.1}
Kc7 {-1.52/6 1.4} 43. a7 {+3.29/12 0.1} Kb7 {-1.19/7 1.4} 44. Rxc6
{+3.83/11 0.1} Kxa7 {-2.22/7 1.4} 45. Rc5 {+3.92/10 0.1} Nb4 {-2.24/7 1.3}
46. Ke2 {+3.92/8 0.1} Kb6 {-2.30/7 1.3} 47. Rxf5 {+4.12/9 0.1} Nc2
{-3.03/7 1.3} 48. Rxf4 {+4.28/9 0.1} Kc6 {-3.47/7 1.3} 49. Kd3
{+4.46/8 0.1} e2 {-3.71/7 1.3} 50. Kxe2 {+4.60/7 0.1} Na1 {-3.26/7 1.4} 51.
Rh4 {+5.01/6 0.2} Nxb3 {-3.45/8 1.3} 52. Rxh7 {+128.50/2 0.1} Nxd4+
{-2.12/8 1.3} 53. Ke3 {+128.51/4 0.2} Nf5+ {-2.86/8 1.3} 54. Kf4
{+128.51/9 0.1} Nd4 {-3.06/8 1.3} 55. h4 {+128.51/1 0.1} Ne6+ {-3.12/7 1.3}
56. Ke5 {+128.51/1 0.2} Nf8 {-3.97/8 1.2} 57. Rg7 {+128.51/2 0.1} Nd7+
{-4.10/9 1.2} 58. Kf5 {+128.51/7 0.1} Nc5 {-4.11/8 1.2} 59. h5
{+128.51/1 0.1} Kd5 {-6.91/7 1.2} 60. h6 {+128.51/1 0.1} Nb3 {-9.99/6 1.2}
61. h7 {+128.51/1 0.1} Nd4+ {-9.99/7 1.2} 62. Kf6 {+128.51/2 0.1} Ke4
{-9.99/6 1.2} 63. Re7+ {+128.51/1 0.1} Kd3 {-9.99/6 1.2} 64. h8=Q
{+128.51/1 0.1} Kc2 {-9.99/4 1.2} 65. Qh3 {+128.51/1 0.1} Kb2 {-9.99/4 1.2}
66. Qe3 {+128.51/1 0.1} Nc6 {-9.99/5 1.2} 67. Qb6+ {+128.51/1 0.1} Kc3
{-9.99/4 1.2} 68. Qxc6+ {+128.51/1 0.1} Kd3 {-9.99/4 1.2} 69. Kf5
{+128.51/1 0.1} Kd2 {-9.99/4 1.2} 70. Ke4 {+128.51/1 0.1} Ke2 {-9.99/3 1.2}
71. Re5 {+128.51/1 0.1} Kf2 {-9.99/4 1.2} 72. Ra5 {+128.51/1 0.1} Kg2
{-9.99/3 1.2} 73. Ra1 {+128.51/1 0.1} Kg3 {-9.99/3 1.1} 74. Rb1
{+128.51/1 0.1} Kf2 {+0.00/1 0.3} 75. Kf4 {+1000.02/2 0.1} Ke2
{-9.99/2 0.4} 76. Qc2# {+1000.01/1 0.1}
{White mates} 1-0[/pgn]

[pgn][Event "Computer Chess Game"]
[Site "Mac-Pro.local"]
[Date "2016.10.06"]
[Round "-"]
[White "Stockfish 100616-12y"]
[Black "Pro Deo 2"]
[Result "0-1"]
[TimeControl "60+1"]
[Annotator "1. +0.07 14... -0.07"]

1. d4 {+0.07/8} Nf6 {+0.00/1 0.1} 2. Nf3 {+0.07/8 0.1} g6 {+0.00/1 0.1} 3.
c4 {+0.62/8 0.1} Bg7 {+0.00/1 0.1} 4. Nc3 {+0.81/8 0.1} d5 {+0.00/1 0.1} 5.
cxd5 {+1.39/9 0.1} Nxd5 {+0.00/1 0.1} 6. e4 {+1.33/9 0.1} Nxc3
{+0.00/1 0.1} 7. bxc3 {+0.97/9 0.1} c5 {+0.00/1 0.1} 8. Bb5+ {+0.39/9 0.1}
Bd7 {+0.00/1 0.1} 9. Bxd7+ {+0.40/9 0.1} Qxd7 {+0.00/1 0.1} 10. O-O
{+0.52/9 0.1} cxd4 {+0.00/1 0.1} 11. cxd4 {+0.86/9 0.1} Nc6 {+0.00/1 0.1}
12. Be3 {+0.64/9 0.1} O-O {+0.00/1 0.1} 13. Rb1 {+0.64/7 0.1} e6
{+0.00/1 0.1} 14. Qd3 {+0.47/9 0.1} f5 {-0.07/12 2.1} 15. exf5
{+0.18/8 0.2} Rxf5 {+0.09/11 1.4} 16. Rfd1 {-0.01/7 0.1} Rd5 {+0.23/12 2.3}
17. Rbc1 {+0.11/7 0.1} e5 {+0.55/13 3} 18. Qb3 {-0.34/9 0.1} Na5
{+0.72/14 2.4} 19. Qb4 {-0.70/9 0.2} exd4 {+0.85/13 2.2} 20. Bd2
{-0.70/9 0.1} d3 {+0.95/12 1.6} 21. Re1 {-0.49/10 0.2} Nc6 {+0.90/13 1.5}
22. Qb3 {-0.70/10 0.2} Kh8 {+0.78/12 1.7} 23. Re4 {-0.70/7 0.1} Rf8
{+0.89/12 1.6} 24. Rb1 {-0.65/9 0.2} b6 {+0.94/12 2.2} 25. Rbe1
{-0.61/8 0.1} Nd4 {+1.21/13 2.7} 26. Nxd4 {+0.14/8 0.2} Bxd4 {+1.05/11 0.5}
27. Kh1 {-0.33/9 0.1} Bxf2 {+1.27/12 1.8} 28. Re7 {+0.00/7 0.2} Bxe1
{+3.78/13 6} 29. Qc3+ {-3.98/10 0.1} Rd4 {+3.81/7 0.1} 30. Rxe1
{-3.40/9 0.1} Kg8 {+3.91/13 2.4} 31. Kg1 {-4.50/9 0.1} Qd5 {+4.27/11 1.4}
32. Re7 {-3.65/9 0.1} Qc5 {+4.51/13 1.3} 33. Qxc5 {-3.42/9 0.2} bxc5
{+4.66/10 0.2} 34. Rxa7 {-3.50/7 0.1} Re8 {+5.53/16 2.4} 35. Kf1
{-6.62/9 0.1} Re2 {+7.92/15 3} 36. Bc3 {-7.00/10 0.1} d2 {+8.19/14 2.0} 37.
Bxd2 {-7.23/10 0.1} Rdxd2 {+7.69/11 0.3} 38. a4 {-7.48/8 0.1} Rf2+
{+17.18/16 1.5} 39. Ke1 {-8.57/10 0.2} Rde2+ {+327.44/16 0.9} 40. Kd1
{-8.57/1 0.1} Rb2 {+327.50/14 0.8} 41. Kc1 {-7.60/7 0.1} Ra2
{+327.54/10 0.1} 42. Kb1 {-8.62/9 0.1} Rae2 {+327.58/8 0.1} 43. Ra8+
{-1000.05/6 0.1} Kg7 {+327.60/6 0.1} 44. Ra7+ {-1000.03/3 0.1} Kh6
{+327.62/3 0.1} 45. Rd7 {-1000.02/1 0.1} Re1+ {+327.64/1 0.1} 46. Rd1
{-1000.01/1 0.1} Rxd1# {+327.66/1 0.1}
{Black mates} 0-1[/pgn]

[pgn][Event "Computer Chess Game"]
[Site "Mac-Pro.local"]
[Date "2016.10.06"]
[Round "-"]
[White "Stockfish 100616-12y"]
[Black "Super Speedy 1.0 (Crafty also playing fast, but not as fast)"]
[Result "1/2-1/2"]
[TimeControl "60+1"]
[Annotator "1. +0.07 2... +0.14"]

1. d4 {+0.07/8} Nf6 2. Nf3 {+0.07/8 0.1} e6 {+0.14/17 1.6} 3. e3
{+0.41/7 0.1} Nc6 {+0.17/16 1.8} 4. c4 {+0.33/8 0.2} d5 {+0.21/17 1.8} 5.
Be2 {+0.45/8 0.2} Bd6 {+0.21/18 1.4} 6. O-O {+0.40/8 0.2} O-O
{+0.30/17 1.4} 7. Nc3 {+0.46/8 0.2} Bd7 {+0.29/16 1.4} 8. Qb3 {+0.78/6 0.2}
Na5 {-0.72/18 1.3} 9. Qc2 {-0.14/9 0.1} Nxc4 {-0.73/17 1.6} 10. Bxc4
{+0.82/9 0.1} dxc4 {-0.85/18 1.5} 11. e4 {+0.72/7 0.1} Be7 {-0.84/17 1.8}
12. b3 {-0.25/9 0.2} cxb3 {-0.82/17 1.6} 13. axb3 {-0.30/9 0.1} Bb4
{-0.82/15 1.7} 14. Na2 {+0.00/10 0.2} Ba5 {-0.62/19 1.1} 15. b4
{-0.41/9 0.1} Bb6 {-1.04/17 1.2} 16. Nc3 {-0.42/9 0.2} Re8 {-0.95/16 1.7}
17. Be3 {-0.40/9 0.1} Qe7 {-0.95/16 1.5} 18. b5 {-0.03/8 0.1} Ng4
{-0.86/15 1.8} 19. Bg5 {+0.25/8 0.2} f6 {-0.71/16 1.8} 20. Bd2
{+0.02/9 0.2} Red8 {-0.73/17 1.3} 21. h3 {+0.03/7 0.2} Nh6 {-0.76/16 1.2}
22. Bxh6 {-0.02/9 0.1} gxh6 {-0.69/17 1.6} 23. Rfe1 {+0.04/7 0.1} h5
{-0.84/14 1.3} 24. Qd2 {+0.06/8 0.1} Kh8 {-0.80/15 1.9} 25. e5
{+0.22/7 0.1} Rg8 {-0.95/16 1.3} 26. exf6 {+0.37/10 0.1} Qxf6
{-0.75/16 1.8} 27. Ne5 {+0.16/10 0.2} Rad8 {-0.85/17 1.7} 28. Re4
{-0.16/9 0.2} Be8 {-0.88/16 1.7} 29. Rd1 {-0.59/10 0.2} Qg7 {-1.56/17 1.1}
30. g3 {+0.13/7 0.1} Rxd4 {-1.64/18 1.3} 31. Rxd4 {-1.02/10 0.1} Qxe5
{-1.71/18 1.7} 32. Rd3 {-1.20/10 0.2} Rxg3+ {-1.90/17 1.6} 33. Kh1
{-1.20/7 0.2} Rxd3 {-1.96/18 1.6} 34. Qxd3 {-0.31/9 0.1} c6 {-1.87/17 1.6}
35. Qf3 {+0.29/8 0.1} Qf5 {-1.24/16 1.6} 36. Qxf5 {-0.56/11 0.1} exf5
{-1.37/21 1.5} 37. Re1 {-0.57/10 0.1} Bg6 {-1.42/20 1.4} 38. Re7
{-0.23/9 0.1} Bxf2 {-0.94/21 1.7} 39. Rxb7 {-0.08/9 0.2} cxb5
{-0.93/20 1.2} 40. Kg2 {-0.04/9 0.1} Bc5 {-1.05/19 1.7} 41. Nxb5
{-0.04/7 0.2} a5 {-0.85/20 1.5} 42. Kf3 {-0.12/10 0.2} h4 {-0.68/16 1.6}
43. Rc7 {+0.00/8 0.2} Bg1 {-0.36/17 1.5} 44. Rc8+ {-0.01/9 0.2} Kg7
{-0.30/19 1.5} 45. Ra8 {+0.00/10 0.1} Bh5+ {-0.29/18 1.5} 46. Kf4
{+0.02/9 0.1} Be2 {-0.35/20 1.2} 47. Nd6 {-0.09/9 0.2} Bh2+ {+0.00/19 1.4}
48. Ke3 {-0.08/9 0.1} Bxd6 {+0.00/22 1.3} 49. Kxe2 {+0.14/8 0.2} Bb4
{+0.00/25 1.4} 50. Ra6 {+0.13/9 0.2} f4 {+0.21/24 1.1} 51. Kf3
{+0.30/8 0.1} Bd2 {+0.14/23 1.4} 52. Kg4 {+0.23/8 0.2} Kf7 {+0.00/21 1.5}
53. Rc6 {+0.04/8 0.1} h5+ {+0.00/21 1.5} 54. Kf3 {+0.28/9 0.1} Be3
{+0.05/22 1.4} 55. Rh6 {+0.62/8 0.1} Bc1 {+0.37/23 1.2} 56. Rxh5
{+1.02/6 0.1} a4 {+0.05/25 1.4} 57. Rxh4 {+0.52/7 0.1} Kg6 {+1.09/22 1.1}
58. Rg4+ {+0.48/6 0.1} Kh5 {+0.03/29 1.4} 59. Rg1 {+0.41/6 0.1} Bb2
{+0.03/33 1.0} 60. Rh1 {+0.70/3 0.1} a3 {-0.19/30 1.0} 61. Rd1
{+0.00/4 0.1} a2 {-0.19/31 1.0} 62. Kxf4 {+0.00/3 0.1} a1=Q {-0.19/32 1.0}
63. Rxa1 {+0.00/1 0.1} Bxa1 {-0.19/34 0.9} 64. h4 {+0.00/1 0.1} Bd4
{-0.19/26 0.9} 65. Kf5 {+0.00/8 0.1} Bc5 {-0.19/30 0.9} 66. Ke5
{+0.00/10 0.1} Bb6 {-0.19/29 0.8} 67. Kd5 {+0.00/9 0.1} Be3 {-0.19/29 0.8}
68. Ke6 {+0.00/10 0.2} Bh6 {-0.19/35 1.0} 69. Kf5 {+0.00/8 0.1} Bd2
{-0.19/31 0.9} 70. Ke4 {+0.00/10 0.2} Bb4 {-0.19/31 0.8} 71. Kf5
{+0.00/11 0.2} Be1 {-0.19/31 0.9} 72. Ke4 {+0.00/11 0.1} Bd2 {-0.19/35 0.9}
73. Kd3 {+0.00/12 0.1} Bc1 {-0.19/34 1.0} 74. Ke4 {+0.00/13 0.1} Bb2
{-0.19/34 0.9} 75. Kd5 {+0.00/12 0.1} Bf6 {-0.19/32 0.9} 76. Ke4
{+0.00/12 0.1} Bg7 {-0.19/35 1.0} 77. Kf5 {+0.00/13 0.2} Bc3 {-0.19/31 0.9}
78. Ke6 {+0.00/13 0.2} Ba1 {-0.19/35 0.9} 79. Kf7 {+0.00/14 0.2} Be5
{-0.19/35 0.9} 80. Ke6 {+0.00/14 0.2} Bc3 {-0.19/38 1.0} 81. Kd5
{+0.00/15 0.2} Bb2 {-0.19/34 1.0} 82. Kc4 {+0.00/14 0.2} Bf6 {-0.19/37 1.0}
83. Kd3 {+0.00/15 0.1} Bg7 {-0.19/34 1.0} 84. Kc2 {+0.00/12 0.1} Bd4
{-0.19/38 1.0} 85. Kd3 {+0.00/13 0.1} Bf2 {-0.19/40 1.0} 86. Ke2
{+0.00/14 0.2} Bg1 {-0.19/38 1.0} 87. Kd3 {+0.00/15 0.2} Bc5 {-0.19/30 0.9}
88. Kc4 {+0.00/15 0.2} Be3 {-0.19/35 0.9} 89. Kb5 {+0.00/15 0.1} Kg4
{-0.19/28 0.9} 90. h5 {+0.00/14 0.1} Kf5 {-0.07/24 0.8} 91. Kc4
{+0.00/10 0.1} Bh6 {-0.07/29 1.0} 92. Kb3 {+0.00/14 0.2} Kg4 {-0.07/30 1.1}
93. Kc4 {+0.00/14 0.2} Kg5 {+0.00/31 0.9} 94. Kb3 {+0.00/15 0.1} Kf5
{-0.05/34 0.9} 95. Ka2 {+0.00/15 0.1} Ke4 {-0.05/33 1.0} 96. Kb3
{+0.00/12 0.1} Kf4 {-0.05/33 0.8} 97. Kb4 {+0.00/15 0.1} Bf8+
{+0.00/34 0.9} 98. Kb3 {+0.00/14 0.1} Bg7 {+0.00/41 0.9} 99. h6
{+0.00/15 0.1} Bxh6 {+0.00/47 1.0}
{Insufficient material} 1/2-1/2[/pgn]

[pgn][Event "Computer Chess Game"]
[Site "Mac-Pro.local"]
[Date "2016.10.06"]
[Round "-"]
[White "Stockfish 100616-12y"]
[Black "Zappa 1.1"]
[Result "1-0"]
[TimeControl "60+1"]
[Annotator "1. +0.07 1... -0.18"]

1. d4 {+0.07/8} Nf6 {-0.18/10 3} 2. Nf3 {+0.07/8 0.2} Nc6 {-0.16/10 6} 3.
e3 {+0.28/8 0.1} d5 {-0.10/10 3} 4. Ne5 {+0.42/6 0.1} Bd7 {-0.01/10 3} 5.
Be2 {+0.52/7 0.1} g6 {+0.02/9 3} 6. c4 {+0.67/8 0.1} Bg7 {-0.09/9 2.9} 7.
Qb3 {+0.82/8 0.2} Na5 {-0.12/10 2.9} 8. Qb4 {+0.36/9 0.2} b6 {+0.08/9 2.3}
9. Nd2 {+0.48/8 0.1} O-O {+0.15/10 2.3} 10. O-O {+0.58/7 0.2} Nc6
{+0.08/10 2.4} 11. Qb3 {+0.55/9 0.2} Nxe5 {+0.04/10 2.2} 12. dxe5
{+0.55/7 0.2} dxc4 {-0.06/10 2.2} 13. Bxc4 {+0.68/9 0.1} Ng4 {+0.07/10 3}
14. e6 {+0.91/8 0.2} fxe6 {-0.02/10 2.1} 15. Bxe6+ {+0.31/8 0.1} Kh8
{-0.13/9 2.0} 16. Nf3 {+0.22/10 0.1} Bxe6 {-0.07/10 4} 17. Qxe6
{+0.43/9 0.2} Nh6 {-0.13/10 1.9} 18. Ng5 {+0.54/9 0.2} Rf6 {-0.06/10 4} 19.
Qb3 {+0.52/8 0.1} Qg8 {-0.13/10 4} 20. Qc2 {+0.46/9 0.2} c5 {+0.00/10 1.5}
21. Bd2 {+0.64/8 0.1} Rd8 {+0.08/9 1.5} 22. Rad1 {+0.50/9 0.1} Qxa2
{+0.31/9 1.5} 23. Ne4 {+1.35/8 0.2} Rff8 {+0.86/10 1.5} 24. Bc3
{+0.03/10 0.1} a5 {+0.71/10 1.5} 25. Bxg7+ {+0.60/8 0.1} Kxg7
{-0.18/10 1.5} 26. Qc3+ {+0.70/9 0.2} Kg8 {-0.12/11 1.5} 27. Rxd8
{+0.65/11 0.1} Rxd8 {+0.00/11 1.4} 28. Qe5 {+0.86/10 0.2} Nf7
{-0.14/11 1.4} 29. Qxe7 {+1.77/8 0.2} Qb3 {-0.32/10 2.1} 30. h4
{+2.08/9 0.1} Qxb2 {-0.19/10 1.4} 31. h5 {+1.80/10 0.1} gxh5 {+0.00/11 1.4}
32. Nf6+ {+1.48/9 0.1} Kg7 {-1.60/10 1.4} 33. Nxh5+ {+1.86/8 0.1} Kg8
{-1.77/10 1.4} 34. f4 {+1.93/10 0.2} a4 {-2.83/10 1.4} 35. Rf3
{+2.60/8 0.1} Kh8 {-4.53/10 1.5} 36. Qxf7 {+3.28/9 0.1} Rg8 {-2.59/11 1.4}
37. Rf2 {+2.57/10 0.1} Qb1+ {-4.35/12 1.3} 38. Kh2 {+3.39/10 0.2} Qg6
{-4.81/12 1.4} 39. Qd5 {+3.42/11 0.2} Re8 {-5.24/11 1.7} 40. Ra2
{+3.42/7 0.1} Qg4 {-4.21/10 1.3} 41. Kg1 {+3.60/10 0.1} Qe6 {-4.21/11 1.3}
42. Qxe6 {+3.60/7 0.1} Rxe6 {-4.68/13 1.3} 43. Rxa4 {+3.64/9 0.1} Kg8
{-5.03/12 1.5} 44. Kf2 {+3.64/7 0.1} Kf7 {-4.89/10 1.3} 45. g4
{+3.81/8 0.1} Re7 {-4.98/10 1.3} 46. Ra6 {+4.02/8 0.1} Rb7 {-5.08/11 1.3}
47. Ng3 {+4.02/9 0.1} c4 {-5.43/11 1.3} 48. Ne4 {+4.31/8 0.1} Ke7
{-6.11/10 1.3} 49. f5 {+4.41/8 0.1} Kd7 {-5.96/11 1.3} 50. Kf3
{+4.45/9 0.1} Kc6 {-6.11/11 1.3} 51. f6 {+4.87/9 0.1} h6 {-5.98/11 1.2} 52.
Kf4 {+5.49/9 0.1} Rb8 {-6.03/11 1.3} 53. Kf5 {+5.65/10 0.1} Rf8
{-6.10/10 1.2} 54. Kg6 {+6.64/8 0.1} Kb7 {-7.54/10 1.2} 55. Ra1
{+7.06/9 0.2} Kc6 {-8.71/11 1.2} 56. Kg7 {+7.45/10 0.1} Rc8 {-9.75/10 1.2}
57. f7 {+8.31/9 0.2} Rc7 {-11.06/10 1.2} 58. Rf1 {+8.87/9 0.1} Rd7
{-12.03/10 1.7} 59. Kxh6 {+9.26/8 0.1} Rd8 {-13.68/10 1.2} 60. f8=Q
{+10.39/9 0.1} Rxf8 {-14.93/10 1.2} 61. Rxf8 {+11.00/8 0.1} Kd5
{-15.95/9 1.2} 62. Nc3+ {+11.41/7 0.2} Kc5 {-17.51/7 1.2} 63. Rc8+
{+50.82/7 0.1} Kd6 {-21.16/8 1.2} 64. Rxc4 {+13.50/7 0.2} b5 {-21.76/9 1.2}
65. Nxb5+ {+128.50/3 0.1} Kd5 {-26.42/8 1.2} 66. Rc7 {+128.51/1 0.1} Ke4
{-27.25/9 1.2} 67. Rc3 {+128.51/1 0.1} Kd5 {-29.16/9 1.2} 68. Kg5
{+128.51/1 0.1} Ke5 {-27.12/9 1.2} 69. Rc5+ {+128.51/1 0.1} Ke4
{-25.14/8 1.2} 70. Rc3 {+128.51/1 0.1} Kf3 {-26.74/9 1.2} 71. Na7
{+128.51/1 0.1} Kg3 {-32.32/10 2.1} 72. Rc5 {+128.51/1 0.1} Kf2
{-29.46/10 1.2} 73. Kf4 {+128.51/1 0.1} Ke2 {-1000.07/10 1.1} 74. Nb5
{+128.51/4 0.1} Kd3 {-1000.08/9 1.1} 75. Rc3+ {+128.51/1 0.1} Ke2
{-1000.06/9 1.1} 76. e4 {+128.51/5 0.1} Kf2 {-1000.05/9 1.1} 77. Nd4
{+128.51/5 0.1} Kg2 {-1000.04/9 1.1} 78. e5 {+128.51/1 0.1} Kf2
{-1000.04/9 1.1} 79. g5 {+128.51/1 0.1} Ke1 {-1000.04/8 1.1} 80. Ke3
{+128.51/1 0.1} Kf1 {-1000.03/9 1.1} 81. e6 {+128.51/1 0.1} Kg2
{-1000.04/8 1.1} 82. g6 {+128.51/1 0.1} Kg3 {-1000.04/8 1.1} 83. e7
{+128.51/1 0.1} Kg4 {-1000.04/8 1.1} 84. e8=Q {+128.51/1 0.1} Kg5
{-1000.04/7 1.1} 85. g7 {+128.51/1 0.1} Kf6 {-1000.03/6 1.1} 86. g8=B
{+128.51/1 0.1} Kg5 {-1000.03/6 1.0} 87. Nc2 {+128.51/1 0.1} Kh4
{-1000.03/6 1.0} 88. Kf2 {+128.51/1 0.1} Kg5 {-1000.03/6 1.0} 89. Kf3
{+128.51/1 0.1} Kf6 {-1000.03/6 1.0} 90. Kf4 {+128.51/1 0.1} Kg7
{-1000.02/6 1.0} 91. Ke5 {+128.51/1 0.1} Kh6 {-1000.02/6 1.0} 92. Kf4
{+128.51/1 0.2} Kg7 {-1000.02/7 1.0} 93. Kf5 {+128.51/1 0.1} Kh8
{-1000.02/6 1.0} 94. Qe5+ {+128.51/1 0.1} Kxg8 {-1000.02/6 1.0} 95. Qb8+
{+128.51/1 0.1} Kh7 {-1000.02/6 1.0} 96. Na1 {+128.51/1 0.1} Kg7
{-1000.02/7 1.0} 97. Rc7+ {+128.51/1 0.1} Kh6 {-1000.01/7 1.0} 98. Qh8#
{+1000.01/1 0.1}
{White mates} 1-0
[/pgn]

Then I ran a quick 40 game test against Zappa 1.1

Zappa 1.1 is rated 2604 on the CCRL , latest dev SF performed at a 2722 level with setting of 20 which informed Stockfish to only use 1/2400th the time allotted.

Code: Select all

ResultSet-EloRating>r
Rank Name                  Rating   Δ     +    -     #     Σ    Σ%     W    L    D   W%    =%   OppR 
------------------------------------------------------------------------------------------------------
   1 Stockfish 100616-12y   2722   0.0   90   90    40   27.5  68.8   21    6   13  52.5  32.5  2604 
   2 Zappa 1.1              2604 117.7   90   90    40   12.5  31.2    6   21   13  15.0  32.5  2722 
------------------------------------------------------------------------------------------------------

So maybe I under estimated the strength of Stockfish on a 486-DX , might be closer to 2700-2800.

Stockfish modified source code and MacOS exe can be found here.

https://github.com/MichaelB7/Stockfish

[/url]

[Jesse Gersenson]

I have a Thinkpad 370C we could test with. It's got an Intel 486DX4 75MHz cpu, 11906 KB of ram and an operating system (Windows 95).

http://www.thinkwiki.org/wiki/Category:370C

Now what?

We need a binary.

[Vinvin]

I have a Thinkpad 370C we could test with. It's got an Intel 486DX4 75MHz cpu, 11906 KB of ram and an operating system (Windows 95).

http://www.thinkwiki.org/wiki/Category:370C

Now what?

We need a binary.

Great !
Now we need a compile for 486 and Win95 ...

[MikeB]

Made some changes - option is now called "Throttle" - A Throtle setting of zero allows Stockfish to Stockfish to play full force, a throttle of one cuts the thinking time in half, throttle of 2 cuts thing thinking time to 1/4, a throttle of 3 cuts thinking time to 1/8 . The highest throttle setting will cut thinking time to 1/1048576 ( 2^20). Now obviously, this would require a time control setting where the allotted ms could be divided by such a big number. As an example on my Mac using time control 3 m 3 s - I can see a noticeable difference between the throttle setting of 17 and 18 - but almost no difference between 18,19 and 20. However if I use a time control of 15 m 15 s, the differences are noticeable between the settings 18, 19 and 20.

game 3 3, Throttle setting of 20
[pgn][Event "Computer Chess Game"]
[Site "Mac-Pro.local"]
[Date "2016.10.08"]
[Round "-"]
[White "Stockfish 100816-12y"]
[Black "Mephisto Dallas 32 bit"]
[Result "0-1"]
[TimeControl "180+3"]
[Annotator "3. -1.11"]

1. e4 {+0.90/1} e5 {+0.00/1 0.7} 2. Qh5 {+1.54/2 0.2} Nc6 {+0.36/1 6} 3.
Ne2 {-1.11/5 0.2} Nf6 {+1.16/1 6} 4. Qf3 {-1.75/6 0.1} Bc5 {+1.24/1 6} 5.
Nbc3 {-0.46/1 0.2} Nb4 {+1.45/1 6} 6. Kd1 {-1.02/1 0.1} d6 {+1.08/1 6} 7.
h3 {-2.19/5 0.1} O-O {+1.00/1 6} 8. a3 {-1.27/5 0.1} Nc6 {+0.68/1 6} 9. b4
{-1.15/1 0.1} Bb6 {+0.80/1 6} 10. Bb2 {-1.24/5 0.1} a5 {+0.68/1 6} 11. Nd5
{-1.22/1 0.1} axb4 {+1.45/1 6} 12. Nxb6 {-1.08/3 0.1} cxb6 {+1.00/1 6} 13.
axb4 {-0.81/6 0.1} Rxa1+ {+1.40/1 5} 14. Bxa1 {-0.81/5 0.2} Nxb4
{+1.28/1 5} 15. Ng3 {-0.80/5 0.1} Qc7 {+1.40/1 5} 16. Bc3 {-1.03/5 0.1} Na2
{+1.60/1 5} 17. Bb2 {-1.03/3 0.1} Be6 {+1.72/1 5} 18. Qd3 {-0.65/5 0.1} Ra8
{+2.08/1 5} 19. Be2 {-1.22/5 0.1} Nb4 {+2.24/1 5} 20. Qc3 {-1.12/1 0.1} Qc5
{+2.36/1 5} 21. Qxc5 {-1.22/1 0.2} bxc5 {+2.84/1 5} 22. d3 {-1.15/4 0.2}
Ra2 {+1.88/1 5} 23. Kc1 {-1.64/1 0.1} b6 {+1.76/1 5} 24. Nf5 {-1.09/2 0.1}
Bxf5 {+2.08/1 5} 25. exf5 {-1.44/6 0.2} b5 {+1.45/1 5} 26. Kb1
{-1.34/3 0.1} Ra7 {+1.32/1 5} 27. c3 {-1.12/1 0.1} Nbd5 {+1.36/1 5} 28. c4
{-1.10/1 0.1} Nf4 {+2.76/1 5} 29. Bf1 {-1.94/6 0.2} bxc4 {+2.76/1 5} 30.
dxc4 {-1.94/1 0.1} Ne4 {+2.84/1 5} 31. f3 {-1.94/1 0.1} Nd2+ {+3.08/1 4}
32. Kc2 {-1.94/1 0.1} Nxf1 {+3.28/1 4} 33. Rxf1 {-3.04/6 0.2} Nxg2
{+3.36/1 4} 34. Rg1 {-2.65/5 0.1} Ne3+ {+3.40/1 4} 35. Kd3 {-2.87/7 0.1}
Nxf5 {+3.68/1 4} 36. f4 {-3.01/6 0.1} exf4 {+4.04/1 4} 37. Ke4
{-3.36/6 0.1} g6 {+4.28/1 4} 38. Kxf4 {-3.41/6 0.1} Ra4 {+4.40/1 4} 39. Rc1
{-2.93/1 0.2} Rb4 {+3.92/1 4} 40. Ba3 {-2.72/1 0.2} Rb3 {+6.00/1 4} 41. Ra1
{-4.84/7 0.1} Ne3 {+6.16/1 4} 42. Ra2 {-4.30/6 0.1} Nxc4 {+7.72/1 4} 43.
Bc1 {-5.00/5 0.1} Rxh3 {+7.64/1 4} 44. Kg4 {-5.02/5 0.2} Rh5 {+7.84/1 4}
45. Bf4 {-4.64/5 0.1} f5+ {+7.84/1 4} 46. Kf3 {-4.84/5 0.1} g5 {+7.92/1 4}
47. Rc2 {-4.59/1 0.1} d5 {+7.92/1 4} 48. Bg3 {-5.72/5 0.1} Rh3 {+7.92/1 4}
49. Kg2 {-5.49/6 0.1} Ne3+ {+8.00/1 4} 50. Kxh3 {-4.79/2 0.1} Nxc2
{+8.16/1 4} 51. Bd6 {-5.93/5 0.2} c4 {+9.99/1 4} 52. Kg3 {-7.16/6 0.1} Kf7
{+9.99/1 4} 53. Bc7 {-6.60/1 0.1} f4+ {+9.99/1 4} 54. Kf2 {-6.76/5 0.1} d4
{+9.99/1 4} 55. Kf3 {-6.76/3 0.1} d3 {+9.99/1 4} 56. Ba5 {-6.25/2 0.1} Nd4+
{+9.99/1 4} 57. Kf2 {-8.15/5 0.2} Nb3 {+9.99/1 4} 58. Bb4 {-8.32/8 0.2} d2
{+9.99/1 4} 59. Bxd2 {-9.64/6 0.1} Nxd2 {+9.99/1 4} 60. Ke2 {-9.64/1 0.2}
Nb3 {+9.99/1 4} 61. Ke1 {-9.34/4 0.2} g4 {+9.99/1 4} 62. Kd1 {-53.81/6 0.1}
f3 {+9.99/1 4} 63. Ke1 {-56.89/7 0.1} g3 {+9.99/1 4} 64. Kd1 {-56.93/6 0.1}
g2 {+9.99/1 4} 65. Kc2 {-66.06/6 0.1} g1=Q {+9.99/1 4} 66. Kc3
{-128.50/5 0.1} f2 {+9.99/1 4} 67. Kb4 {-66.10/4 0.1} f1=Q {+9.99/1 0.9}
68. Kc3 {-1000.03/4 0.1} Qd3+ {+0.00/1 0.2} 69. Kb4 {-1000.02/5 0.1} Qc5+
{+0.00/1 0.2} 70. Ka4 {-1000.01/1 0.2} Qd7# {+0.00/1 0.2}
{Black mates} 0-1[/pgn]

and if you combine this setting with the uci limit setting of 1250, you will have the weakest playing stockfish of all time - watch here at Mephisto Dallas 32 (running in emulation) mates Stockfish in less than 30 moves:
game 3 3, throttle setting of 20 with elo skill set 1250
[pgn][Event "Computer Chess Game"]
[Site "Mac-Pro.local"]
[Date "2016.10.08"]
[Round "-"]
[White "Stockfish 100816-12y"]
[Black "Mephisto Dallas 32 bit"]
[Result "0-1"]
[TimeControl "180+3"]
[Annotator "1. +0.16"]

1. d3 {+0.16/4} d5 {+0.00/1 0.7} 2. Be3 {-0.04/4 0.1} Nc6 {+0.55/1 6} 3.
Nd2 {-1.07/4 0.2} e5 {+0.72/1 6} 4. h4 {-0.74/3 0.1} d4 {+3.36/1 6} 5. g3
{-1.16/2 0.1} dxe3 {+4.04/1 6} 6. fxe3 {-3.45/1 0.1} Bc5 {+4.20/1 6} 7. Nc4
{-4.22/4 0.2} Be6 {+4.80/1 6} 8. c3 {-3.62/4 0.1} Bxc4 {+5.28/1 6} 9. dxc4
{-4.08/1 0.2} Bxe3 {+5.40/1 6} 10. Qxd8+ {-3.64/3 0.1} Rxd8 {+5.96/1 6} 11.
Nf3 {-3.94/5 0.2} h6 {+5.68/1 6} 12. Bh3 {-3.46/1 0.1} Nf6 {+5.96/1 6} 13.
a4 {-3.72/3 0.1} Ne4 {+6.04/1 5} 14. b4 {-4.81/1 0.1} Nxc3 {+6.92/1 5} 15.
Kf1 {-4.80/1 0.1} e4 {+7.80/1 5} 16. Nh2 {-5.80/1 0.1} Nxb4 {+8.04/1 5} 17.
Bg4 {-5.84/1 0.1} Nc2 {+9.99/1 5} 18. Re1 {-6.85/1 0.1} Nxe1 {+9.99/1 5}
19. Bf5 {-11.10/3 0.2} h5 {+9.99/1 5} 20. a5 {-11.90/3 0.1} Rd1 {+9.99/1 5}
21. a6 {-12.12/4 0.1} bxa6 {+9.99/1 5} 22. Bh3 {-11.28/2 0.1} Bc5
{+9.99/1 5} 23. Bc8 {-11.82/1 0.1} Nc2+ {+9.99/1 5} 24. Kg2 {-15.77/1 0.1}
Ne3+ {+9.99/1 5} 25. Kh3 {-30.05/6 0.2} Rxh1 {+9.99/1 2.2} 26. g4
{-24.14/6 0.2} hxg4+ {+0.00/1 0.3} 27. Bxg4 {-26.06/8 0.1} Bd6
{+0.00/1 0.2} 28. Bd7+ {-1000.02/5 0.1} Kxd7 {+0.00/1 0.2} 29. c5
{-1000.01/1 0.1} Rxh2# {+0.00/1 0.2}
{Black mates} 0-1[/pgn]

See http://www.talkchess.com/forum/viewtopi ... 806#688806 for link to source and latest Mac exe

[bnemias]

We need a binary.

You can try http://goabq.org/tmp/stockfish-x86-old.7z

Inside there are two SF6 builds that might work.

Anyone is free to post that file elsewhere, as I will be removing it in a few days. I can't have my internet saturated with downloading binaries.