Chess Engines Diary

Tarnished - UCI chess engine  Rating Chess Engines Diary CEDR=3690 Author: Anik Patel (Bobingstern) What has changed in the new version  Tarnished 6.0? "The call of long-lost grace speaks to us all..." Stronger multilayer NNUE, +32 elo This may be the final release of Tarnished... NNUE Now using a (768x16hm->1792)x2->(16->32->32)x8 architecture, trained on ~22b positions Tarnished 2.1 JA  - tactical test Tarnished 2.1 JA was tested against the position shown in the diagram, where the non-obvious move 1.Rg4+ wins. Tarnished 2.1JA compiled by Jim Ablett and it solved the problem without any problems. Interestingly, the "original" 2.1 compiled failed and after 10 minutes of analysis it proposed 1.Bd5. Tarnished 4.0 vs other engines: Caissa 1.23 5/14 -4 14 Games Knightx 4.5 10/10 +10 10 Games Belofte 2.1.9 (u) JA 10/10 +10 10 Games Critter 1.6a 9.5/10 +9 10 Games Lynx 1.10.0 9.5/10 +9 10 Games Pawnocchio 1.8 4.5/8 +1 8 Games Titan 1.1.0 4/8 +0 8 Games Vi...

The 3rd Chess Engine League has concluded. Tarnished 5.0 (Hero) won, Igel 3.6.3 JA came in second, and Revenge 4.0 came in third. These three engines have been promoted to the 2nd League.   You can find more information about the CEDR Chess Engine League on the dedicated website -   LEAGUE . CEDR   855.782 games download   (01.04.2026) 💾  Tournament  download with 240 games 💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI - Banksia #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine Score (Tie) +/-/= 1: Tarnished 5.0 (Hero) 17.0 / 30 249.75 (+4 -0 =26) 2: Igel 3.6.3 JA 17.0 / 30 249.50 (+4 -0 =26) 3: Revenge 4.0 16.5 / 30 244.00 (+3 -0 =27) 4: Cinder 0.4.1 16.0 / 30 237.75 (+2 -0 =28) 5: Dragon free 16.0 / 30 237.25 (+2 -0 =28) ...

The 4th Chess Engine League has concluded. Tarnished 5.0 secured a decisive victory, with PZChessBot 6.1 taking second place and Zangdar 6.1.1 finishing third. All three engines have earned promotion to the 3rd League. Additionally, a playoff match for 13th place was held between Marvin 6.3.0 JA and Patricia 5 . Patricia emerged victorious, resulting in the relegation of Marvin 6.3.0 JA. Patricia 5 now awaits the updated CEDR ranking list; if no other engines move up in the rankings, it will remain in the 4th League. You can find more information about the CEDR Chess Engine League on the dedicated website -   LEAGUE . CEDR   837.643 games download   (01.03.2026) 💾  Tournament  download with 240 games 💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI - Arena #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" 4 League edition 03/2026   Play Off Marvin 6.3.0 JA vs Particia 5.0 , 2026.03.17 P...

Tarnished - UCI chess engine Author: Anik Patel (Bobingstern) What has changed in the new version  Tarnished 5.0? "A lone hero fights for his vengeance..." Very strong NNUE and stronger search! +116 LTC UHO, estimated ~3700 CCRL Blitz NNUE Now using a (768x16hm->1536)x2->1x8 architecture, trained on ~22b positions Dataset relabeled with (768x8hm->4096)x2->(96->192->192->1)x8 network Search Hindsight Extension Several Tweaks Actually fixed SMP! Tarnished 2.1 JA  - tactical test Tarnished 2.1 JA was tested against the position shown in the diagram, where the non-obvious move 1.Rg4+ wins. Tarnished 2.1JA compiled by Jim Ablett and it solved the problem without any problems. Interestingly, the "original" 2.1 compiled failed and after 10 minutes of analysis it proposed 1.Bd5. Tarnished 4.0 vs other engines: Caissa 1.23 5/14 -4 14 Games Knightx 4.5 10/10 +10 10 Games Belofte 2.1.9 (u) JA 10/10 +10 10 Games Critter 1.6a 9.5/10 +9 10 Games Lynx 1.10....

Several new versions of chess engines for  Android have recently been released. Here they are:  Artemis 21.2 TR PrO 161225, Artemis 21.3TR PrO 191225, DarkSeid 7.5 Elite Edition, Quirky 2.1 JA, Tactical Titan 5.9 PrO, Tarnished 4.0 dev.1137 JA, Vajolet2 Perspective v1 JA . We'll start testing them soon, so stay tuned for the results. Chess engine for Android - Artemis 21.2 TR PrO 161225 Rating CEDR=???? Artemis 21.2 TR PrO 161225 for Android download 👉 see post  Artemis 21.2 TR PrO 161225 Chess engine for Android - Artemis 21.3TR PrO 191225 Rating CEDR=??? Artemis 21.3TR PrO 191225 for Android download 👉 see post Artemis 21.3TR PrO 191225 for Windows   Chess engine for Android - DarkSeid 7.5 Elite Edition Rating CEDR=??? DarkSeid 7.5 Elite Edition for Android download 👉 see post DarkSeid 7.5 Elite Edition for Windows Chess engine for Android - Petrel 3.2 JA Rating CEDR=???? Petrel 3.2 JA for Android download 👉 see post Petrel 3.2 JA...

Tarnished - UCI chess engine Author: Anik Patel (Bobingstern) What has changed in the new version  Tarnished 4.0 dev.1137 JA? dev release for TCEC bigger network, more data, etc Tarnished 2.1 JA  - tactical test Tarnished 2.1 JA was tested against the position shown in the diagram, where the non-obvious move 1.Rg4+ wins. Tarnished 2.1JA compiled by Jim Ablett and it solved the problem without any problems. Interestingly, the "original" 2.1 compiled failed and after 10 minutes of analysis it proposed 1.Bd5. Tarnished 4.0 vs other engines: Caissa 1.23 5/14 -4 14 Games Knightx 4.5 10/10 +10 10 Games Belofte 2.1.9 (u) JA 10/10 +10 10 Games Critter 1.6a 9.5/10 +9 10 Games Lynx 1.10.0 9.5/10 +9 10 Games Pawnocchio 1.8 4.5/8 +1 8 Games Titan 1.1.0 4/8 +0 8 Games Viridithas 18.0.0 4/8 +0 8 Games RubiChess 20250606 JA 3.5/8 -1 8 Games Motor 0.9.0 3.5/8 -1 8 Games Horsie 1.1.0 3.5/8 -1 8 Games Obsidian dev-16.14 3/8 -2 8 Games PlentyChess 6.0.18 3/8 -2 8 Games Clover 9.0 JA 3/8 -2 8...

The Tarnished 4.0 won the E07 group with a perfect score. The Dog 4.10 came in second, and the Meltdown 1.10 came in third. These three engines advanced to the E08 group.     CEDR   760.349 games download   (01.10.2025) 💾  Tournament  download with 105 games 💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI - Arena 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine CEDR Score (Tie) Chg +/-/= 1: Tarnished 4.0 2400 13.5 / 14 86.25 +94 (+13 -0 =1) 2: Dog 4.10 2400 11.0 / 14 61.50 +70 (+10 -2 =2) 3: Meltdown 1.10 2400 11.0 / 14 59.50 +70 (+10 -2 =2) 4: Prelude Fusion 2.0 2400 10.5 / 14 61.00 +64 (+7 -0 =7) 5: Admete 1.8.0 2645 9.5 / 14 52.50 +10 (+7 -2 =5) 6: Clovis III dev.5d50 JA 2885 9.0 / 14 ...

  Group E-4, the qualifying round for the TOP-64 Elite Chess Engine League , has concluded. Tarnished 4.0 (Consort) won, Meltdown 1.10 came in second, Rodent IV 0.33 JA came in third, and Prelude Fusion 2.0 came in fourth. These four engines advanced to Group E-3. The tournament was played over nine rounds using the Swiss system. The bottom four engines in the standings were relegated to the lower group: Cadabra 2.1.0 JA, Camel 1.6.0, ChessMaster 2023 , and Freda 1.1 JA . CEDR   760.349 games download   (01.10.2025) 💾  Tournament  download with 144 games 💻 Asus Zenbook, AMD Ryzen 9 6900HX, RAM 32,0 GB  🖬 GUI - Aquarium 👍 #chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3" P Engine CEDR Score (Tie) Chg +/-/= 1: Tarnished 4.0 (Consort) 2400 8.5 / 9 49.0 +51 (+8 -0 =1) 2: Meltdown 1.10 2400 6.5 / 9 48.0 +32 (+5 -1 =3) 3: Rodent IV 0.33 JA ...