Chess Engines Diary

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: VandeVondele More: Timestamp: 1498694812  Remove race suppression.  Pull #1134 fixed another race, so that can be removed from the thread sanitizer suppressions.  No functional change.  Closes #1150  ⭐⭐⭐   Stockfish 17062902_VandeVondele  - download

Temp 3' + 3" Hardware: Intel Core i7-4710MQ with 7,9 GB Memory, Windows 10 64-bit 264 Tournament games, GUI- Arena 3.5.1 ,  161.651 JCER games download ,  until 31.12.2016   28.044 JCER games download (from 01.01.2017)  JCER League Book: Perfect 2017 ,     Games, engines, book - download        Table created - Scid vs PC All files (games, tables and engines) -  download from page

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Marco Costalba More: Timestamp: 1498694615  Only main thread checks time  The main change of the patch is that now time check  is done only by main thread. In the past, before lazy  SMP, we needed all the threds to check for available  time because main thread could have been blocked on  a split point, now this is no more the case and main  thread can do the job alone, greatly simplifying the logic.  Verified for regression testing on STC with 7 threads:  LLR: 2.96 (-2.94,2.94) [-3.00,1.00]  Total: 11895 W: 1741 L: 1608 D: 8546  No functional change.  Closes #1152  ⭐⭐⭐   Stockfish 17062902 - download

Dumb - "A simple & stupid UCI chess engine" Homepage Dumb - download All files (games, tables and engines) -  download from page

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Marco Costalba More: Timestamp: 1498694099  Simplify pos_is_ok()  Now we don't need anymore the tricky pointer to  show the failed test. Added some few tests too.  Also small rename in see_ge() while there.  No functional change  Closes #1151  ⭐⭐⭐    Stockfish 17062901 - download

RuyDos - UCI chess engine Author - Álvaro Begué RuyDos 2017.06.26 - download from page

Belofte 0.9.0 - download Homepage We have stopped posting files on Shortest. Currently, you can find the current links on the DOWNLOAD page. Most of them are placed on Katfile servers. If you do not want to wait long with the download, you can support our work and become a donor. As a thank you, we provide you with a link to the MEGA drive, where you can download the engines and other files without waiting. More information can be found on the DONORS page.

Marvin -  Winboard/UCI chess engine Rating JCER=2316 Homepage Author - Martin Danielsson Marvin 2.1.0 - download All files (games, tables and engines) - download from page

Holiday until 1 July 🌴🌴🌴

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: VoyagerOne More: Timestamp: 1498079165  Increase reduction if tt-move is a capture  The idea is that chances are the tt-move is best and will be difficult to raise alpha when playing a quiet move.  STC:  LLR: 2.95 (-2.94,2.94) [0.00,5.00]  Total: 7582 W: 1415 L: 1259 D: 4908  LTC:  LLR: 2.97 (-2.94,2.94) [0.00,5.00]  Total: 59553 W: 7885 L: 7573 D: 44095  Bench: 5725676  Closes #1147  ⭐⭐⭐   Stockfish 17062123_Voyager - download

Temp 3' + 3" Hardware: Intel Core i3-3217U CPU with 3,9 GB Memory , Windows 10 64-bit 840 Tournament games, GUI- Arena 3.5.1 ,  161.651 JCER games download ,  until 31.12.2016   28.044 JCER games (from 01.01.2017)  JCER League Book: Perfect 2017 ,     Table created - Scid vs PC All files (games, tables and engines) - download from page

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: snicolet More: Timestamp: 1498078919  Improve readability of evaluation functions  This patch puts the evaluation helper functions inside EvalInfo struct, which simplifies a bit their signature and (most importantly, IMHO) makes their C++ code much cleaner and simpler to read (by removing the "ei." qualifiers all around in evaluate.cpp).  Also rename the EvalInfo struct into Evaluation class to get a natural invocation v = Evaluation(p).value() to evaluation position p.  The downside is an increase of 20 lines in evaluate.cpp (for the prototypes of the helper functions). The upsides are better readability and a speed-up of 0.6% (by generating all the helpers for the NO_TRACE case together, which helps the instruction cache).  No functional change  Closes #1135  ⭐⭐⭐   Stockfish 17062123 - download

Baislicka - UCI chess engine Author - Robert Taylor Baislicka 1.0 - download All files (games, tables and engines) -  download from page

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: VoyagerOne  More: Timestamp: 1498078030  Update Top CPU - Bench: 6599721  Closes #1145  ⭐⭐⭐   Stockfish 17062122_Voyager - download

Monochrome TM - download All files (games, tables and engines) -  download from page

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Joona Kiiski  More: Timestamp: 1498077903 Revert "Prefetch earlier in qsearch()" This reverts commit b73016bb41d4c2fad3126b2e0018d71a36e78331. No functional change Closes #1144  ⭐⭐⭐   Stockfish 17062122_Kiiski - download

Aristides 220617 - download

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Joost VandeVondele More: Timestamp: 1498077478  Fix four data races.  the nodes, tbHits, rootDepth and lastInfoTime variables are read by multiple threads, but not declared atomic, leading to data races as found by -fsanitize=thread. This patch fixes this issue. It is based on top of the CI-threading branch (PR #1129), and should fix the corresponding CI error messages.  The patch passed an STC check for no regression:  http://tests.stockfishchess.org/tests/view/5925d5590ebc59035df34b9f  LLR: 2.96 (-2.94,2.94) [-3.00,1.00]  Total: 169597 W: 29938 L: 30066 D: 109593  Whereas rootDepth and lastInfoTime are not performance critical, nodes and tbHits are. Indeed, an earlier version using relaxed atomic updates on the latter two variables failed STC testing (http://tests.stockfishchess.org/tests/view/592001700ebc59035df34924), which can be shown to be due to x...

Temp 3' + 3" Hardware: Intel Core i7-4710MQ with 7,9 GB Memory , Windows 10 64-bit 168 Tournament games , GUI- Arena 3.5.1 ,  161.651 JCER games download ,  until 31.12.2016   28.044 JCER games download (from 01.01.2017)  JCER League Book: Perfect 2017 ,     Games, engines, book - download        Table created - Scid vs PC

Temp 3' + 3" Hardware: Intel Core i7-4710MQ with 7,9 GB Memory , Windows 10 64-bit 650 Tournament games , GUI- Arena 3.5.1 ,  161.651 JCER games ,  until 31.12.2016   28.044 JCER games download (from 01.01.2017)  JCER League Book: Perfect 2017 ,     Games, engines, book - download        Table created - Scid vs PC

Cfish 170619 - download Edit on: 25.01.2025. Since the old links have long expired, all versions of the  Cfish  engine that we have (111 files) have been packed into one file today and are available for download.  Cfish - all versions download . If the link has expired, write to us at the email address: EnginesDiary@proton.me All files (games, tables and engines) -  download from page

Counter - UCI chess engine Author - Vadim Chizhov   Counter 2.01 - download

CT800 - winboard chess engine Homepage Author: Rasmus Althoff CT800 v1.11 - download All files (games, tables and engines) -  download from page

Roc  is a new chess engine, derived from  Gull 3 .  Rating JCER=3105 Roc 0.8 - download All files (games, tables and engines) - download from page

Nemorino   - UCI chess engine Author - Christian Günther Home page Rating JCER=2784 Nemorino 3.0 download from page

Chess22k - UCI (java) chess engine Homepage Rating JCER=2333 Chess22k 1.4 - download

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Alain SAVARD  More: Timestamp: 1497668130  Misc coding style fixes  a few comment and blank fixes.  No functional change  Closes #1141  ⭐⭐⭐   Stockfish 17061704_savard - download

Temp 3' + 3" Hardware: Intel Core i7-4710MQ with 7,9 GB Memory , Windows 10 64-bit 650 Tournament games , GUI- Arena 3.5.1 ,  161.651 JCER games ,  until 31.12.2016   28.044 JCER games download (from 01.01.2017)  JCER League Book: Perfect 2017 ,   Table created - Scid vs PC All files (games, tables and engines) - download from page

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Snicolet  More: Timestamp: 1497667958  Prefetch earlier in qsearch()  Closes #1139  ⭐⭐⭐   Stockfish 17061704_snicolet - download

NG Play  - winboard chess engine Author - George Georgopoulos  JCER =1962 NG Play 9.87b download All files (games, tables and engines) -  download from page

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Marco Costalba  More: Timestamp: 1497666824  Better naming in endgame code  And small clean-up of magic bitboards code.  No functional change.  Closes #1138    ⭐⭐⭐    Stockfish 17061704_costalba - download

Embla  - UCI chess engine Author - Folkert van Heusden Rating JCER=1720 All files (games, tables and engines) - download from page   Embla 0.9.91 - download

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Brian Sheppard  More: Timestamp: 1497666619  Move depth calculation in probCut  The change passed an STC regression:  LLR: 2.95 (-2.94,2.94) [-3.00,1.00]  Total: 59350 W: 10793 L: 10738 D: 37819  Base Test Diff  Mean 2014338 2016121 -1783  StDev 62655 63441 3860  p-value: 0.678  speedup: 0.001  No functional change.  Closes #1137    ⭐⭐⭐    Stockfish 17061704_Brian Sheppard - download

ChessBrainVB  -  winboard chess engine Rating JCER=2479 Author - Roger Zuehlsdorf   ChessBrainVB 3.31 - download

Stockfish , chess engine UCI Leader rating list JCER = 3372 🔬 Author: Joost VandeVondele More: Timestamp: 1497666001  Call TT.new_search() earlier.  TT.new_search() was being called by mainThread in Thread::search(). However, mainThread is the last to start searching, and helper threads could reach a measured rootDepth 10 (on 64 cores) before mainThread increments the TT generation. Fixed by moving the call to MaintThread::search() before helper threads start searching.  No functional change.  Closes #1134    ⭐⭐⭐    Stockfish 17061704 - download