Stockfish vs Reckless (TCEC Season 29 Replay)

Discussion of computer chess matches and engine tournaments.

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goni-K26
Posts: 12
Joined: Mon Mar 09, 2026 4:16 pm
Full name: Agron Kovaci

Stockfish vs Reckless (TCEC Season 29 Replay)

Post by goni-K26 »

Hi everyone!

I am running a replay of the TCEC 29 Superfinal matchup between Stockfish and Reckless, along with several other top engines. I want to see how these results translate to a different hardware environment and time control.

Tournament Setup:

Code: Select all

Name: 	  TCEC 29 SuFi: Stockfish vs Reckless Replay
Level: 	  Blitz 3/2
Hash: 	  256
Threads:  Single Thread
Openings: TCEC-SuFi29 Openings
GUI:      Arena Chess GUI
Hardware: Intel(R) Core(TM) i5-4570 3.20GHz 8GB RAM
OS:       Windows 11 Pro x64

Integrity & Family Regulations:
To preserve the purity of the competitive rankings and avoid internal redundancy:
Matches between engines of the same family or architectural lineage are not contested on the board.
These pairings are pre-recorded as a Standard Draw (0.5 – 0.5).
Participants:

Code: Select all

No |           Name                 | Elo  |
 1 | Stockfish 18 x64(AVX2)         | 2980 |
 2 | Stockfish 17.1 x64(AVX2)       | 2975 |
 3 | Reckless 0.9.0 x64(AVX2)       | 2970 |
 4 | Reckless 0.8.0 x64(AVX2)       | 2965 |
 5 | PlentyChess 7.0.0 x64(BMI2)    | 2963 |
 6 | Obsidian 16.0 x64(BMI2)        | 2950 |
 7 | Alexandria 9.0.0 x64(BMI2)     | 2945 |
 8 | Komodo Dragon 3.3 x64(AVX2)    | 2930 |
Live Standing:

Code: Select all

No |           Name              |Points|Games|Live Elo| Elo  |  +/-  | Score |
 1 | Stockfish 18 x64(AVX2)      | 76.0 | 120 | 2999.1 | 2980 | +19.2 | 63.3% |
 2 | Stockfish 17.1 x64(AVX2)    | 73.5 | 120 | 2991.3 | 2975 | +16.4 | 61.2% |
 3 | Reckless 0.9.0 x64(AVX2)    | 63.0 | 119 | 2972.1 | 2970 |  +2.2 | 52.9% |
 4 | PlentyChess 7.0.0 x64(BMI2) | 69.0 | 138 | 2962.0 | 2963 |  -1.0 | 50.0% |
 5 | Reckless 0.8.0 x64(AVX2)    | 57.5 | 119 | 2959.5 | 2965 |  -5.5 | 48.3% |
 6 | Alexandria 9.0.0 x64(BMI2)  | 64.0 | 138 | 2942.6 | 2945 |  -2.3 | 46.3% |
 7 | Obsidian 16.0 x64(BMI2)     | 63.0 | 138 | 2944.6 | 2950 |  -5.4 | 45.6% |
 8 | Komodo Dragon 3.3 x64(AVX2) | 49.0 | 138 | 2911.0 | 2930 | -19.0 | 35.5% |
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goni-K26
Posts: 12
Joined: Mon Mar 09, 2026 4:16 pm
Full name: Agron Kovaci

Re: Stockfish vs Reckless (TCEC Season 29 Replay)

Post by goni-K26 »

Live Standing: after 20 rounds

Code: Select all

No |           Name              |Points|Games|Live Elo| +/-  | Score |
 1 | Stockfish 18 x64(AVX2)      | 76,0 | 120 | 2999,1 |+19,2 | 63,3% |
 2 | Stockfish 17.1 x64(AVX2)    | 73,5 | 120 | 2991,3 |+16,4 | 61,2% |
 3 | Reckless 0.9.0 x64(AVX2)    | 64,0 | 120 | 2973,0 | +3,0 | 53,3% |
 4 | PlentyChess 7.0.0 x64(BMI2) | 70,0 | 140 | 2961,8 | -1,1 | 50,0% |
 5 | Reckless 0.8.0 x64(AVX2)    | 57,5 | 120 | 2958,6 | -6,4 | 47,9% |
 6 | Alexandria 9.0.0 x64(BMI2)  | 65,0 | 140 | 2942,6 | -2,3 | 46,4% |
 7 | Obsidian 16.0 x64(BMI2)     | 64,0 | 140 | 2944,6 | -5,4 | 45,7% |
 8 | Komodo Dragon 3.3 x64(AVX2) | 50,0 | 140 | 2911,1 |-18,8 | 35,7% |
------------------------------------------------------------------------
Download Pgn Games(Zip)
------------------------------------------------------------------------
Status: RUNNING: 520/2.600 games played
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goni-K26
Posts: 12
Joined: Mon Mar 09, 2026 4:16 pm
Full name: Agron Kovaci

Re: Stockfish vs Reckless (TCEC Season 29 Replay)

Post by goni-K26 »

________________________________________________________________________________________________
Top-Tournament Setup
________________________________________________________________________________________________
Live Standing: after 24 rounds

Code: Select all

No |           Name              |Points|Games|Live Elo|  +/-  |Score |
 1 | Stockfish 18 x64(AVX2)      | 91,0 | 144 | 3002,6 | +22,7 | 63,1 |
 2 | Stockfish 17.1 x64(AVX2)    | 88,5 | 144 | 2995,1 | +20,2 | 61,4 |
 3 | Reckless 0.9.0 x64(AVX2)    | 79,0 | 144 | 2977,1 |  +7,2 | 54,8 |
 4 | PlentyChess 7.0.0 x64(BMI2) | 82,0 | 168 | 2958,8 |  -4,1 | 48,8 |
 5 | Reckless 0.8.0 x64(AVX2)    | 70,0 | 144 | 2959,0 |  -6,0 | 48,6 |
 6 | Obsidian 16.0 x64(BMI2)     | 78,0 | 168 | 2945,3 |  -4,7 | 46,4 |
 7 | Alexandria 9.0.0 x64(BMI2)  | 76,0 | 168 | 2939,3 |  -5,6 | 45,2 |
 8 | Komodo Dragon 3.3 x64(AVX2) | 59,5 | 168 | 2906,6 | -23,3 | 35,4 |
________________________________________________________________________________________________

Crosstable:
________________________________________________________________________________________________

Code: Select all

----|----------------------------|---------|-|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|-|--------|
Rank|            Name            |  Score  |-| Stockfish 18 x64(AVX2) |Stockfish 17.1 x64(AVX2)|Reckless 0.9.0 x64(AVX2)|PlentyChess 7.0.0 x64(BM|Reckless 0.8.0 x64(AVX2)|Obsidian 16.0 x64(BMI2) |Alexandria 9.0.0 x64(BMI|Komodo Dragon 3.3 x64(AV|-|  S-B   |
----|----------------------------|---------|-|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|-|--------|
  1-|Stockfish 18 x64(AVX2)      |103.0/168|-|························|========================|01==01===1=1===1=1=1=10=|01==0==101=======1=101=1|====1==01=10==1=1=1=1=1=|===1=1=1=1=1==11===1=1==|1===1=1=1=1=====1=10==1=|1===1===1=1===1=1=1=1=10|-| 8279,50|
  2-|Stockfish 17.1 x64(AVX2)    |100.5/168|-|========================|························|=1==010==10====1===101=1|10====10===01=1=10=01=10|1=====1=1==0==10101===10|=1==01=1=1=1=1=1=1=====1|01===1=1=1=1===1===1=1=1|1===1=1=1=1=1=1=1=1=1=10|-| 8072,00|
  3-|Reckless 0.9.0 x64(AVX2)    | 91.0/168|-|10==10===0=0===0=0=0=01=|=0==101==01====0===010=0|························|1===101=101===1010==1=1=|========================|01===10==1=1==0===1==1=1|10==10=01=10====1=101===|111====1=1=1===1=1=1=1=1|-| 7328,00|
  4-|PlentyChess 7.0.0 x64(BMI2) | 82.0/168|-|10==1==010=======0=010=0|01====01===10=0=01=10=01|0===010=010===0101==0=0=|························|1=====101======0101010=0|====1==0======10=010=0=0|01===101==0=====01=1=1==|1===1===1=101=1====01=1=|-| 6785,20|
  5-|Reckless 0.8.0 x64(AVX2)    | 82.0/168|-|====0==10=01==0=0=0=0=0=|0=====0=0==1==01010===01|========================|0=====010======1010101=1|························|=0==1010==1====0==1010==|=0==1=101=10=====0=01===|=1===1=101=1====01=101=1|-| 6759,70|
  6-|Obsidian 16.0 x64(BMI2)     | 78.0/168|-|===0=0=0=0=0==00===0=0==|=0==10=0=0=0=0=0=0=====0|10===01==0=0==1===0==0=0|====0==1======01=101=1=1|=1==0101==0====1==0101==|························|========1=00===010101=10|====01=1===1===1=1=1=101|-| 6385,00|
  7-|Alexandria 9.0.0 x64(BMI2)  | 76.0/168|-|0===0=0=0=0=====0=01==0=|10===0=0=0=0===0===0=0=0|01==01=10=01====0=010===|10===010==1=====10=0=0==|=1==0=010=01=====1=10===|========0=11===101010=01|························|10===0101=1==0====1=101=|-| 6315,00|
  8-|Komodo Dragon 3.3 x64(AVX2) | 59.5/168|-|0===0===0=0===0=0=0=0=01|0===0=0=0=0=0=0=0=0=0=01|000====0=0=0===0=0=0=0=0|0===0===0=010=0====10=0=|=0===0=010=0====10=010=0|====10=0===0===0=0=0=010|01===1010=0==1====0=010=|························|-| 5133,00|
----|----------------------------|---------|-|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|-|--------|
Standing: after 20 rounds
________________________________________________________________________________________________
Download Pgn Games(Zip)
Status: RUNNING: 624/2.600 games played
________________________________________________________________________________________________
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goni-K26
Posts: 12
Joined: Mon Mar 09, 2026 4:16 pm
Full name: Agron Kovaci

Re: Stockfish vs Reckless (TCEC Season 29 Replay)

Post by goni-K26 »

________________________________________________________________________________________________
Top-Tournament Setup
________________________________________________________________________________________________
Live Standing: after 30 rounds(sorted by score)

Code: Select all

No |           Name              |Points|Games|Live Elo|  +/-  |Score |
 1 | Stockfish 18 x64(AVX2)      | 91,0 | 144 | 3002,6 | +22,7 | 63,1% |
 2 | Stockfish 17.1 x64(AVX2)    | 88,5 | 144 | 2995,1 | +20,2 | 61,4% |
 3 | Reckless 0.9.0 x64(AVX2)    | 79,0 | 144 | 2977,1 |  +7,2 | 54,8% |
 4 | PlentyChess 7.0.0 x64(BMI2) | 82,0 | 168 | 2958,8 |  -4,1 | 48,8% |
 5 | Reckless 0.8.0 x64(AVX2)    | 70,0 | 144 | 2959,0 |  -6,0 | 48,6% |
 6 | Obsidian 16.0 x64(BMI2)     | 78,0 | 168 | 2945,3 |  -4,7 | 46,4% |
 7 | Alexandria 9.0.0 x64(BMI2)  | 76,0 | 168 | 2939,3 |  -5,6 | 45,2% |
 8 | Komodo Dragon 3.3 x64(AVX2) | 59,5 | 168 | 2906,6 | -23,3 | 35,4% |
________________________________________________________________________________________________

Crosstable:
________________________________________________________________________________________________

Code: Select all

----|----------------------------|---------|-|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|-|--------|
Rank|            Name            |  Score  |-| Stockfish 18 x64(AVX2) |Stockfish 17.1 x64(AVX2)|Reckless 0.9.0 x64(AVX2)|PlentyChess 7.0.0 x64(BM|Reckless 0.8.0 x64(AVX2)|Obsidian 16.0 x64(BMI2) |Alexandria 9.0.0 x64(BMI|Komodo Dragon 3.3 x64(AV|-|  S-B   |
----|----------------------------|---------|-|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|-|--------|
  1-|Stockfish 18 x64(AVX2)      |103.0/168|-|························|========================|01==01===1=1===1=1=1=10=|01==0==101=======1=101=1|====1==01=10==1=1=1=1=1=|===1=1=1=1=1==11===1=1==|1===1=1=1=1=====1=10==1=|1===1===1=1===1=1=1=1=10|-| 8279,50|
  2-|Stockfish 17.1 x64(AVX2)    |100.5/168|-|========================|························|=1==010==10====1===101=1|10====10===01=1=10=01=10|1=====1=1==0==10101===10|=1==01=1=1=1=1=1=1=====1|01===1=1=1=1===1===1=1=1|1===1=1=1=1=1=1=1=1=1=10|-| 8072,00|
  3-|Reckless 0.9.0 x64(AVX2)    | 91.0/168|-|10==10===0=0===0=0=0=01=|=0==101==01====0===010=0|························|1===101=101===1010==1=1=|========================|01===10==1=1==0===1==1=1|10==10=01=10====1=101===|111====1=1=1===1=1=1=1=1|-| 7328,00|
  4-|PlentyChess 7.0.0 x64(BMI2) | 82.0/168|-|10==1==010=======0=010=0|01====01===10=0=01=10=01|0===010=010===0101==0=0=|························|1=====101======0101010=0|====1==0======10=010=0=0|01===101==0=====01=1=1==|1===1===1=101=1====01=1=|-| 6785,20|
  5-|Reckless 0.8.0 x64(AVX2)    | 82.0/168|-|====0==10=01==0=0=0=0=0=|0=====0=0==1==01010===01|========================|0=====010======1010101=1|························|=0==1010==1====0==1010==|=0==1=101=10=====0=01===|=1===1=101=1====01=101=1|-| 6759,70|
  6-|Obsidian 16.0 x64(BMI2)     | 78.0/168|-|===0=0=0=0=0==00===0=0==|=0==10=0=0=0=0=0=0=====0|10===01==0=0==1===0==0=0|====0==1======01=101=1=1|=1==0101==0====1==0101==|························|========1=00===010101=10|====01=1===1===1=1=1=101|-| 6385,00|
  7-|Alexandria 9.0.0 x64(BMI2)  | 76.0/168|-|0===0=0=0=0=====0=01==0=|10===0=0=0=0===0===0=0=0|01==01=10=01====0=010===|10===010==1=====10=0=0==|=1==0=010=01=====1=10===|========0=11===101010=01|························|10===0101=1==0====1=101=|-| 6315,00|
  8-|Komodo Dragon 3.3 x64(AVX2) | 59.5/168|-|0===0===0=0===0=0=0=0=01|0===0=0=0=0=0=0=0=0=0=01|000====0=0=0===0=0=0=0=0|0===0===0=010=0====10=0=|=0===0=010=0====10=010=0|====10=0===0===0=0=0=010|01===1010=0==1====0=010=|························|-| 5133,00|
----|----------------------------|---------|-|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|-|--------|
________________________________________________________________________________________________
Download Pgn Games(Zip)
Status: RUNNING: 780/2.600 games played
________________________________________________________________________________________________
Standing: after 20 rounds
________________________________________________________________________________________________
Here are some of my posts.:
[Handicap] Houdini 6(Rapid 15+10) vs. Elite-25(Blitz 3+2)
The 100:1 Time Odds Massacre
________________________________________________________________________________________________
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Vinvin
Posts: 5321
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Stockfish vs Reckless (TCEC Season 29 Replay)

Post by Vinvin »

Nice ! Thanks !
Would you add Reckless 0.10.0 at the end ?
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goni-K26
Posts: 12
Joined: Mon Mar 09, 2026 4:16 pm
Full name: Agron Kovaci

Re: Stockfish vs Reckless (TCEC Season 29 Replay)

Post by goni-K26 »

Vinvin wrote: ↑Tue Apr 07, 2026 1:35 am Nice ! Thanks !
Would you add Reckless 0.10.0 at the end ?
You're welcome!
Regarding Reckless 0.10.0, I might include it in a future test once the author releases the official version.
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goni-K26
Posts: 12
Joined: Mon Mar 09, 2026 4:16 pm
Full name: Agron Kovaci

Re: Stockfish vs Reckless (TCEC Season 29 Replay)

Post by goni-K26 »

________________________________________________________________________________________________
Tournament Setup
________________________________________________________________________________________________
Live Standing: after 36 rounds(sorted by score)

Code: Select all

No |           Name              |Points|Games|Live Elo|  +/-  | Score |
 1 | Stockfish 18 x64(AVX2)      | 140,5 | 216 | 3020,6 | +40,6 | 65,6 |
 2 | Stockfish 17.1 x64(AVX2)    | 136,0 | 216 | 3010,6 | +35,7 | 62,9 |
 3 | Reckless 0.9.0 x64(AVX2)    | 119,5 | 216 | 2982,5 | +12,5 | 55,3 |
 4 | Reckless 0.8.0 x64(AVX2)    | 102,5 | 216 | 2951,8 | -13,2 | 47,4 |
 5 | PlentyChess 7.0.0 x64(BMI2) | 118,5 | 252 | 2950,3 | -12,6 | 47,3 |
 6 | Obsidian 16.0 x64(BMI2)     | 116,0 | 252 | 2941,5 |  -8,5 | 46,1 |
 7 | Alexandria 9.0.0 x64(BMI2)  | 112,5 | 252 | 2934,3 | -10,6 | 44,6 |
 8 | Komodo Dragon 3.3 x64(AVX2) |  90,5 | 252 | 2896,8 | -33,2 | 35,9 |
________________________________________________________________________________________________

Crosstable:

Code: Select all

----|----------------------------|---------|-|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|-|------|
Rank|            Name            |  Score  |-|       Stockfish 18 x64(AVX2)       |      Stockfish 17.1 x64(AVX2)      |      Reckless 0.9.0 x64(AVX2)      |      Reckless 0.8.0 x64(AVX2)      |    PlentyChess 7.0.0 x64(BMI2)     |      Obsidian 16.0 x64(BMI2)       |     Alexandria 9.0.0 x64(BMI2)     |    Komodo Dragon 3.3 x64(AVX2)     |-| S-B  |
----|----------------------------|---------|-|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|-|------|
  1-|Stockfish 18 x64(AVX2)      |158.5/252|-|····································|====================================|01==01===1=1===1=1=1=10==101=1===1==|====1==01=10==1=1=1=1=1=1=101=1=1===|01==0==101=======1=101=1=1=1=1===1==|===1=1=1=1=1==11===1=1===1=1=1===11=|1===1=1=1=1=====1=10==1=1=1=1===1==1|1===1===1=1===1=1=1=1=101=1=1=1=1==1|-|18978,|
  2-|Stockfish 17.1 x64(AVX2)    |154.0/252|-|====================================|····································|=1==010==10====1===101=1==0=01===1==|1=====1=1==0==10101===101=101=1=1===|10====10===01=1=10=01=101=1=1=======|=1==01=1=1=1=1=1=1=====1=1=1=1===1==|01===1=1=1=1===1===1=1=1=1=1=1=1=11=|1===1=1=1=1=1=1=1=1=1=101=1=1=1=1==1|-|18444,|
  3-|Reckless 0.9.0 x64(AVX2)    |137.5/252|-|10==10===0=0===0=0=0=01==010=0===0==|=0==101==01====0===010=0==1=10===0==|····································|====================================|1===101=101===1010==1=1=1=1=101=10=1|01===10==1=1==0===1==1=10=01=101=1==|10==10=01=10====1=101===101=1=1===01|111====1=1=1===1=1=1=1=1=1===1=1=1==|-|16587,|
  4-|Reckless 0.8.0 x64(AVX2)    |120.5/252|-|====0==10=01==0=0=0=0=0=0=010=0=0===|0=====0=0==1==01010===010=010=0=0===|====================================|····································|0=====010======1010101=10101=10101==|=0==1010==1====0==1010==1010=000====|=0==1=101=10=====0=01===1=10===010=1|=1===1=101=1====01=101=101=1=101====|-|14889,|
  5-|PlentyChess 7.0.0 x64(BMI2) |118.5/252|-|10==1==010=======0=010=0=0=0=0===0==|01====01===10=0=01=10=010=0=0=======|0===010=010===0101==0=0=0=0=010=01=0|1=====101======0101010=01010=01010==|····································|====1==0======10=010=0=01=10==1==0==|01===101==0=====01=1=1==0=0==1=1=1=0|1===1===1=101=1====01=1======0101===|-|14737,|
  6-|Obsidian 16.0 x64(BMI2)     |116.0/252|-|===0=0=0=0=0==00===0=0===0=0=0===00=|=0==10=0=0=0=0=0=0=====0=0=0=0===0==|10===01==0=0==1===0==0=01=10=010=0==|=1==0101==0====1==0101==0101=111====|====0==1======01=101=1=10=01==0==1==|····································|========1=00===010101=10=010=0=0=0=1|====01=1===1===1=1=1=1010==1=1=1=1==|-|14220,|
  7-|Alexandria 9.0.0 x64(BMI2)  |112.5/252|-|0===0=0=0=0=====0=01==0=0=0=0===0==0|10===0=0=0=0===0===0=0=0=0=0=0=0=00=|01==01=10=01====0=010===010=0=0===10|=1==0=010=01=====1=10===0=01===101=0|10===010==1=====10=0=0==1=1==0=0=0=1|========0=11===101010=01=101=1=1=1=0|····································|10===0101=1==0====1=101=1010101=1=0=|-|13935,|
  8-|Komodo Dragon 3.3 x64(AVX2) | 90.5/252|-|0===0===0=0===0=0=0=0=010=0=0=0=0==0|0===0=0=0=0=0=0=0=0=0=010=0=0=0=0==0|000====0=0=0===0=0=0=0=0=0===0=0=0==|=0===0=010=0====10=010=010=0=010====|0===0===0=010=0====10=0======1010===|====10=0===0===0=0=0=0101==0=0=0=0==|01===1010=0==1====0=010=0101010=0=1=|····································|-|11614,|
----|----------------------------|---------|-|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|------------------------------------|-|------|
________________________________________________________________________________________________
Status: RUNNING: 936/2.600 games played. White Wins 413(44,12%) | Black Wins 18(1,92%) | Draws 505(53,95%)
Download Pgn Games(Zip)
________________________________________________________________________________________________
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goni-K26
Posts: 12
Joined: Mon Mar 09, 2026 4:16 pm
Full name: Agron Kovaci

Re: Stockfish vs Reckless (TCEC Season 29 Replay)

Post by goni-K26 »

The standings after 30 rounds remain identical to the results after 24 rounds. The rankings have stabilized.

Apologies for the mess and the duplicate posts, guys!
The forum edit timer ran out while I was formatting the Round 3 tables.
Just ignore the clutter and focus on the latest standings below. Enjoy the results!

Thank You!
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