Hey there!

In the next days I will post a little chess engine tournament here.
The conditions are:
- intel i7-8700K @ 3,7 GHz; 6 CPU's
- 1000 mb hash
- use the Fritz-16-GUI
- time control: 2' + 1''
- Round-robin tournament, 10 games per encounter
- ponder off
- general opening book: Fritz16, up to 10 moves
- book settings: "normal"

For the tournament I use only free and/or open source engines.
All engines run on 64 bit and 6 CPU's.
The participants are:
1) Stockfish 201118
2) Fire 7.1
3) Fizbo 2
4) Ethereal 11.00
5) Andscacs 0.94n
6) Booot 6.3.1
7) Xiphos 0.4.11 SSE
8) Gull 3

Any comments? :)

Greetings
ChrisChess

The pairings for the first round are:

Stockfish vs Fire
Fizbo vs Ethereal
Andscacs vs Booot
Xiphos vs Gull

I forgot to mention:
The openings are repeated with swapped colors

sorry
ChrisChess

Nice, although I would only use 6 cores if you're not using the machine for anything else.

Hello Graham,

thank you. The engines use 6 cores (without hyperthreading). As far as I know, the new Fritz-GUI allows only two settings for the engine match: all cores without and with hyperthreading.

Here are the results from the first round:

Stockfish 201118 vs. Fire 7.1 -- 9.5 - 0.5

Fizbo 2 vs. Ethereal 11.00 -- 3.0 - 7.0

Andscacs 0.94n vs. Booot 6.3.1 -- 6.5 - 3.5

Xiphos 0.4.11 vs. Gull 3 -- 5.0 - 5.0

The pairings for the 2th round are:

Stockfish vs Gull
Fire vs Fizbo
Ethereal vs Andscacs
Booot vs Xiphos

Here are the results from the 2th round:

Stockfish 201118 vs. Gull 3 -- 7.5 - 2.5

Fire 7.1 vs. Fizbo 2 -- 6.5 - 3.5

Ethereal 11.00 vs. Andscacs 0.94n -- 5.5 - 4.5

Booot 6.3.1 va. Xiphos 0.4.11 -- 5.0 - 5.0


intermediate result:
1. Stockfish 201118 | 17.0 | 85 %
2. Ethereal 11.00 | 12.5 | 62.5 %
3. Andscacs 0.94n | 11.0 | 55 %
4. Xiphos 0.4.11 | 10.0 | 50 %
5. Booot 6.3.1 | 8.5 | 42.5 %
6. Gull 3 | 7.5 | 37.5 %
7. Fire 7.1 | 7.0 | 35 %
8. Fizbo 2 | 6.5 | 32.5 %

Round three matching:

Stockfish vs. Fizbo
Andscacs vs. Xiphos
Fire vs. Ethereal
Booot vs. Gull

results from round 3:

Stockfish vs. Fizbo :: 8.5 - 1.5
Andscacs vs. Xiphos :: 3.5 - 6.5
Fire vs. Ethereal :: 5.0 - 5.0
Booot vs. Gull :: 4.0 - 6.0

standings:
1. Stockfish 201118 | 25.5 | 85 %
2. Ethereal 11.00 | 17.5 | 58.3 %
3. Xiphos 0.4.11 | 16.5 | 55 %
4. Andscacs 0.94n | 14.5 | 48.3 %
5. Gull 3 | 13.5 | 45 %
6. Booot 6.3.1 | 12.5 | 41.7 %
7. Fire 7.1 | 12.0 | 40 %
8. Fizbo 2 | 8.0 | 26.7 %


Next round matching:
Stockfish vs. Booot
Fizbo vs. Gull
Fire vs. Andscacs
Ethereal vs. Xiphos

Stockfish vs Booot - 8.0 - 2.0
Fizbo vs Gull - 6.0 - 4.0
Fire vs Andscacs - 6.0 - 4.0
Ethereal vs Xiphos - 4.5 - 5.5

Standings after round 4:
1. Stockfish 201118 | 33.5 | 83.8 %
2. Ethereal 11.00 | 22.0 | 55 %
2. Xiphos 0.4.11 | 22.0 | 55 %
4. Andscacs 0.94n | 18.5 | 46.3 %
5. Fire 7.1 | 18.0 | 45 %
6. Gull 3 | 17.5 | 43.8 %
7. Booot 6.3.1 | 14.5 | 36.3 %
8. Fizbo 2 | 14.0 | 35 %

Next round matching:
Stockfish vs Xiphos
Fizbo vs. Andscacs
Fire vs. Gull
Ethereal va. Booot

Stockfish vs Xiphos - 8.0 - 2.0
Fizbo vs Andscacs - 5.0 - 5.0
Fire vs Gull - 7.0 - 3.0
Ethereal vs Booot - 5.0 - 5.0

Standings after round 5:
1. Stockfish 201118 | 41.5 | 83 %
2. Ethereal 11.00 | 27.0 | 54 %
3. Fire 7.1 | 26.0 | 52 %
4. Xiphos 0.4.11 | 24.0 | 48 %
5. Andscacs 0.94n | 23.5 | 47 %
6. Gull 3 | 20.5 | 41 %
7. Booot 6.3.1 | 19.5 | 39 %
8. Fizbo 2 | 19.0 | 38 %

Next round matching:
Stockfish vs Andscacs
Fizbo vs Xiphos
Fire vs Booot
Ethereal vs Gull

Stockfish vs Andscacs - 9.5 - 0.5
Fizbo vs Xiphos - 4.0 - 6.0
Fire vs Booot - 5.5 - 4.5
Ethereal vs Gull - 4.5 - 5.5

Standings after round 6:
1. Stockfish 201118 | 51.0 | 85 %
2. Fire 7.1 | 31.5 | 52.5 %
2. Ethereal 11.00 | 31.5 | 52.5 %
4. Xiphos 0.4.11 | 30.0 | 50 %
5. Gull 3 | 26.0 | 43.3 %
6. Andscacs 0.94n | 24.0 | 40 %
6. Booot 6.3.1 | 24.0 | 40 %
8. Fizbo 2 | 23.0 | 38.3 %

Last round:
Stockfish vs Ethereal
Fire vs Xiphos
Fizbo vs Booot
Andscacs vs Gull

Stockfish vs Ethereal - 8.0 - 2.0
Fire vs Xiphos - 5.0 - 5.0
Fizbo vs Booot - 5.5 - 4.5
Andscacs vs Gull - 6.5 - 3.5

Final standingd:
1. Stockfish 201118 | 59.0 | 84.3 %
2. Fire 7.1 | 36.5 | 52.1 %
3. Xiphos 0.4.11 | 35.0 | 50.0 %
4. Ethereal 11.00 | 33.5 | 47.9 %
5. Andscacs 0.94n | 30.5 | 43.6 %
6. Gull 3 | 29.5 | 42.1 %
8. Fizbo 2 | 28.5 | 40.7 %
8. Booot 6.3.1 | 28.5 | 40.7 %