23.12.2025

DOWNLOADS:

Please don't publish or share direct file download links offered from this page!
Just use the link for this page.
(There is a reason why this general download page exists, with a direct link no one
can see the given informations for the downloads - e.g. author/date/etc.)

GUIs
  • Cutechess EXPER-3.5.0(cli and GUI)
    		• commit date 2022-01-29 from 'alweys' test branch EXPER-3(see readme), with add. changes by myself2022-04-02
  • Cutechess (cli and GUI)
    		• commit date 2020-09-25 from 'alweys' test branch EXPER-1(see changes.txt), with add. changes by myself2020-10-01
  • Winboard 4.91x (WB 4.91 with some mods by me + a few preinstalled engines)
    		• compiled 2020-04-012021-12-15

    BOOKS/STARTPOSITIONS
  • My current self created pgn test book
    		• fixed 6 plies only! 1185 positions + randomized version + readme)2022-07-19
  • GS_medium.bin
    		• *Polyglot book for bookless programs against programs with books, max depth 30 plies2009-12-30
  • Rybka.bin
    		• *Polyglot book made for Rybka and Shredder, max depth 40 plies2009-12-30
  • GS_Alaric_11f.book
    		• Alaric main book, max depth 40 plies2009-12-30

    OTHER BOOKS
  • Gerbil book
    		• Kurt Utzinger
  • KingOfKings medium book
    		• Dann Corbit

    RWBC GAMES (pgn)
  • RWBC classes games
    		• PIII 650Mhz
  • RWBC classes games
    		• PIV 2.66Ghz + Q8200 2.33Ghz

    TOOLS
  • PGN-Scanner 0.92
    		• Gabriel Guillory
  • Toms Game Analyser GUI version 1.6
    		• Thomas McBurney
  • Toms Live Chess Server version 1.72b
    		• Thomas McBurney (you need to adapt names and server.ini)

    => ENGINES FREE DOWNLOAD (Windows versions/compilations)

    Historical releases from gone websites or compilations added to the XB/UCI chronology.

    The entries with an asterisk (*) in the listing number are directly linked to another download place, because they were flagged false positive by Google once!

    Since 2025-09-09 I have added a password:rwbc to most downloads (just zipped the 7z again to keep the same name and added the pw to save time, after I was informed and realized that meanwhile around a dozen of downloads were falsely flagged for containing a potential virus! from the crappy google virus detection)
    You might get a message that Google cannot check the download and it is on your on risk - Either trust, or discard... cannot help here.

    If the sources are not directly attached to my compilations you'll find a link to them in the readmeGS.txt file!

    DC = compiled by Dann Corbit
    DJ = compiled by Daniel Jose Queralto
    LC = compiled by *linuxchess* (Chess2U forum)
    HK =compiled by Hermann Krause

    #NAME/VERSIONCOMPILATION(S)BYAUTHOR (COUNTRY)DATE
    added/changed
    197OctoChess rev 5506various original + GSDJ/DC/HK/GSTim Kosse (DEU)2025-12-23
    196Philou old versions 1.0.3 - 3.6originalPhilippe Gailhac (FRA)2025-12-23
    195FoxChess 9d61661 + e3984cc GSavx2/bmi2 pgoGSNathan Faltermeier (USA)2025-12-09
    194Natto 0.1.9 24bdb7c GSbmi2/avx2GSRichard Glenister (GBR)2025-11-28
    193Caissa 1.23.10 GSbmi2/avx2 pgoGSMichal Witanowski (POL)2025-11-23
    192Oops!Mate 0.0.3 + 0.0.4 GSavx2/bmi2GSSwoyam Pokharel (NPL)2025-11-23
    191Pytteliten 0.1 GSbmi2/avx2GSChristopher Torgrip (SWE)2025-11-18
    190Spaghet 1.1.3 GSavx2/bmi2 pgoGSYi Ling (USA)2025-11-18
    189PlentyChess 7.0.15 + 7.0.19 GSbmi2/avx2 zen3-pgoGSPatrick Leonhardt (DEU)2025-11-15
    188Chess-rs 0.6.0 GSavx2/bmi2 pgoGSTom Cant (GBR)2025-11-11
    187Prokopakop 1.0dev fb7ccfe GSavx2/bmi2 pgoGSTomas Slama (CZE)2025-11-09
    186MOCHI 20251105_1300 GSavx2/bmi2GSChris Mair (ITA)2025-11-06
    185Chess-3 2.0 e58516b GSavx2/bmi2 pgoGSPaul Sonkoly (GBR)2025-11-06
    184Kimbo 0.2.1 + 0.3.0(+src) + 1.0.0(+src)originalJamie Whiting (GBR)2025-11-05
    183Chess-rs 0.5.0 GSavx2/bmi2 pgoGSTom Cant (GBR)2025-11-04
    182Reckless 0.9.0dev ac1b1d87 GSbmi2/avx2 pgoGSArseniy Surkov + Shahin M. Shahin + Andrew Matthews2025-10-31
    181Prokopakop 1.0dev 250e041 GSavx2/bmi2 pgoGSTomas Slama (CZE)2025-10-31
    180FoxChess 1136b94 GSavx2/bmi2 pgoGSNathan Faltermeier (USA)2025-10-31
    179Goldfinger 1a1707f GSavx2/bmi2GSDaniel Yang (USA)2025-10-24
    178Chess-rs 0.4.2 fbb7a51 GSavx2/bmi2GSTom Cant (GBR)2025-10-14
    177MyGoEngine 0.8dev 72a0632 GSavx2/bmi2GSAdam Griffiths (GBR)2025-10-24
    176Prokopakop 9119428 GSavx2/bmi2GSTomas Slama (CZE)2025-10-11
    175Tuna 1.0.0 GSavx2/bmi2GSBill Chow (USA)2025-09-29
    174Clovis 1.7 + 1.8 + 2.0 GSavx2/bmi2GSJonathan McDermid (CAN)2025-09-26
    173Prokopakop 7cfbb74 GSavx2/bmi2GSTomas Slama (CZE)2025-09-25
    172Crab 4.6.3 GSavx2/bmi2GSJasper Shovelton (GBR)2025-09-17
    171(*)pounce 2.0.1 GSavx2/bmi2GSAlex Flick (USA)2025-08-19
    170Prometheus 0.2.1 GSavx2GSAlex Gisi (USA)2025-08-18
    169Celeris 2.0.0 GSavx2/nmi2 pgoGSFung Evan + Rawlinson George (GBR)2025-08-18
    168pounce 1.2.4 + 1.2.4.8 GSavx2/bmi2GSAlex Flick (USA)2025-08-09
    167FoxChess c9f053e GS + c94e7c3 GSavx2/bmi2GSNathan Faltermeier (USA)2025-07-19
    166(*)MOCHI 20250709_1400 GSavx2/bmi2GSChris Mair (ITA)2025-07-13
    165chessnut 8231b1f GSavx2/bmi2GSAria Kafie (USA)2025-06-22
    164FoxChess 01af4eb GSavx2/bmi2GSNathan Faltermeier (USA)2025-05-20
    163Chess-3 0147aea GSavx2/bmi2 pgoGSPaul Sonkoly (GBR)2025-05-13
    162Carlito 0.1.0 083b730 GSavx2/bmi2GSLovis Hagemeyer (DEU)2025-04-16
    161Minke 0.0.1 17125d2 GSavx2/bmi2GSEduardo Marinho(BRA)2025-04-16
    160Minnow bc07526 GSavx2/bmi2GSKyle Davis (USA)2025-04-06
    159Publius 0.045 + 0.051 GSavx2/bmi2GSKoziol Pawel (POL)2025-03-29
    158Napoleon 12032025 GSavx2/bmi2 (uci opt. fix)GSMarco Pampaloni (ITA)2025-03-27
    157chessnut ebd5b72 GSavx2/bmi2GSAria Kafie (USA)2025-03-20
    156Sunbird 1.2.0 + 1.2.1 + 1.2.5 GSavx2/bmi2GSJan M. D. Hansen (DNK)2025-03-15
    155(*)Nicarao 1085a5f GSavx2/bmi2GSDeybis Melendez (NIC)2025-03-15
    154Axiom 1.1.9 GSavx2/bmi2GSSindre Wolden (NOR)2025-03-15
    153(*)MOCHI 20250308_0000 GSavx2/bmi2GSChris Mair (ITA)2025-03-15
    152PeacockSpider r348 GSavx2/bmi2GSLukasz Szpakowski (POL)2025-03-15
    151(*)Vixen 0.0.5 r256 GSavx2/bmi2GSLazlo Paal (HUN)2025-03-15
    150Clemens 0.40 dev r209 GSavx2/bmi2GSSven Haardiek (DEU)2025-03-15
    149(*)Fiddler 0.1.0 r588 + Fiddler 0.1.0 744fe39 GSavx2/bmi2GSClayton Ramsey (USA)2025-03-11
    148Kojiro 0.1.3 GSavx2/bmi2GSBabak Sefidgar (IRN)2025-03-09
    147Kojiro 0.1.1 GSavx2/bmi2GSBabak Sefidgar (IRN)2025-03-05
    146FoxChess 99a419f GSavx2/bmi2GSNathan Faltermeier (USA)2025-02-22
    145Whitespine 1.1.2 GSavx2/bmi2GSMiloslav Macurek (CZE)2025-02-22
    144Kopyto 5df55e1 GSavx2/bmi2GSPawel Szanja (POL)2025-02-16
    143Motsog 22 GShaswell/pop/ryzen7GSJan M. D. Hansen (DNK)2025-02-14
    142Motsog 19fix GShaswell/pop/ryzen7GSJan M. D. Hansen (DNK)2025-02-14
    141Monchester 1.01-26 D5 GSavx2/bmi2 + sse4.2/popGSTaimo Peelo (EST)2025-02-01
    140Scam 0.4avx2/bmi2GSz + GSFabian von der Warth/Terje Kirstihagen (DEU/NOR)2025-01-31
    139Eidolon 0.1.0 GSavx2/bmi2GSDaniel Malanca (ROU)2025-01-13
    138Frolic 2.5 GSavx2/bmi2GSChris Bao (USA)2025-01-13
    137chestnut dev-892e476 GSavx2/bmi2GSAria Kafie (USA)2024-12-30
    136Rudim 1.4 GSdefaultGSVishnu Bhagyanath (IND)2024-12-18
    135Renegade 1.1.60 GSavx2/bmi2GSKrisztian Peocz (HUN)2024-12-07
    134Weiss 2.1 dev r746 GSavx2 pgoGSTerje Kirstihagen (NOR)2024-12-07
    133Rudim 1.3 GSdefaultGSVishnu Bhagyanath (IND)2024-12-05
    132Pixie 0.8.1 GSavx2/bmi2GSAshish Prasad (IND)2024-11-29
    131Byte-Knight 0.10-665af7e GSavx2/bmi2GSPaul Tsouchlos (USA)2024-11-26
    130(*)Hardfiskur rev-cdeec8a GSavx2/bmi2GSTyler Zhang (USA)2024-11-26
    129Motsog 19 GShaswell/pop/ryzen7GSJan M. D. Hansen (DNK)2024-11-15
    128Toad 0.7.0 GSavx2/bmi2GSDanny Hammer (USA)2024-10-16
    127Hardfiskur rev-66b215f GSavx2/bmi2GSTyler Zhang (USA)2024-10-14
    126Toad 0.6.0 GSavx2/bmi2GSDanny Hammer (USA)2024-10-14
    125Brogle 0.1.0 GSavx2/bmi2GSDanny Hammer (USA)2024-10-08
    124Obsidian 13.25 dev GSavx2 + ssse3 pgoGSGabriele Lombardo (ITA)2024-10-08
    123Crab 4.4.0 GSavx2/bmi2GSJasper Shovelton (GBR)2024-09-28
    122Crab 4.0.0 GSavx2/bmi2GSJasper Shovelton (GBR)2024-09-23
    121Halogen 12.9.0 GSavx2/pext pgoGSKieren Pearson (AUS)2024-09-22
    120Crab 3.33.0 GSavx2/bmi2GSJasper Shovelton (GBR)2024-09-22
    119Obsidian 13.16 dev GSavx2/bmi2 pgoGSGabriele Lombardo (ITA)2024-09-20
    118Altair 7.1.5 dev GSavx2/bmi2 pgoGSAlexander Tiang (CHN)2024-09-17
    117Goldfish 2.1.0 GSavx2/bmi2GSBendik Samseth (NOR)2024-09-15
    116Crab 3.28.0 GSavx2/bmi2GSJasper Shovelton (GBR)2024-08-31
    115Crab 3.24.0 GSavx2/bmi2GSJasper Shovelton (GBR)2024-08-25
    114Goldfish 2.0.0 GSavx2/bmi2GSBendik Samseth (NOR)2024-08-25
    113Crab 3.20.0-dc8b087 GSavx2GSJasper Shovelton (GBR)2024-08-08
    112Annie 0.11 GSavx2GSJoey Bednar (USA)2024-08-08
    111Baryonyx 0.1.16-4a74c7d GSavx2GSIbai Burgos Sanchez (ESP)2024-08-02
    110Annie 0.10 GSavx2GSJoey Bednar (USA)2024-08-02
    109Prometheus 0.2-4b797d3 GSavx2GSAlex Gisi (USA)2024-08-01
    108Illumina 1.0 dev-07fe6f GSavx2+bmi2GSThomas Mergener (BRA)2024-07-30
    107Illumina 1.0 r189 GSavx2GSThomas Mergener (BRA)2024-07-26
    106Prometheus 0.2 GSavx2GSAlex Gisi (USA)2024-07-19
    105Baryonyx 0.1.13 GSavx2GSIbai Burgos Sanchez (ESP)2024-07-09
    104Nibble 0.1 r131 GSavx2GSIbai Burgos Sanchez (ESP)2024-07-09
    103Annie 2ca4ccd GSavx2GSJoey Bednar (USA)2024-07-08
    102ElephantGambit 0.7.0 GSavx2GSAlexander Loodin Ek (SWE)2024-07-04
    101Crab 3.12.0 GSavx2GSJasper Shovelton (GBR)2024-05-07
    100Titan 1.0 GSavx2 + sse4.2/popGSJeffrey Powell (USA)2024-05-07
    99Crab 3.10.0 GSavx2GSJasper Shovelton (GBR)2024-05-02
    98Delocto 0.7 20230720 GSbmi2/avx2GSMoritz Terink (AUT)2024-04-12
    97Cadabra 2.0.1 GSbmi2/avx2GSJoachim Enggard Nebel (SWE)2024-04-12
    96BetsabeII 1.47 - 2023originalJuan Benitez (ESP)2024-04-12
    95Weiss 2.1 dev r717 GSavx2 pgoGSTerje Kirstihagen (NOR)2024-04-07
    94Axon 0.1 - 0.3 + srcoriginalJasper Sinclair (USA)2024-03-10
    93Stellar 1.2.0 GSavx2GSDimitrije Dobrota (SRB)2024-03-09
    92Ciorap 0.3dev r129 GSavx2/popGSVlad Ciocoiu (ROU)2024-03-09
    91Camel 1.3.1 GS(sse4.1 no-pop)GSBruno Mendes (PRT)2024-01-24
    90BasicChessEngine 1.0 GSold/bmi2GSAlexander Wimmer (FRA)2024-01-12
    89Lxna 0.3.1 GSdefaultGSLudovic Debever (FRA)2023-12-18
    88Vividmind 1.0 GS(old + bmi2)GSMauritz Sjödin (SWE)2023-12-18
    87Lxna 0.1.0 + 0.2.0defaultGSLudovic Debever (FRA)2023-11-09
    86Piglet 1.3.3 GS(old + bmi2)GSPaul Webster (USA)2023-10-31
    85Camel 1.1.0 + 1.2.0 GS(sse4.1 no-pop)GSBruno Mendes (PRT)2023-09-20
    84SSEChessII 2.02 + 2.045 +2.050originalDCSam Slutzky (USA)2023-09-20
    83Camel 1.0.0 + 1.0.1 GS(sse4.1 no-pop)GSBruno Mendes (PRT)2023-09-05
    82ChandraChess 1.0 GSold/bmi2GSAditya Chandra (IND)2023-08-21
    81Redtail 0.1.0 rev111 GSold/bmi2 (+less memory usage)GSGeorge Munroyo (ZAF)2023-08-20
    80Rengar 1.0.0default (bmi2)GSThomas Swayze (GBR)2023-08-18
    79Freda 0.9 GSdefault + slower search timeGSShaun Howe (GBR)2023-08-18
    78(*)Blaze 0.1 (fka Trappist)sse4.1 no-popGSAzri Antar (DZA)2023-08-18
    77JikChess 0.0.2originalJanne I. Kokkola (FIN)2023-07-21
    76Megalodon 1.1.0sse4.1/no-pop and bmi2GSPatrick Huang + Arjun Sahlot (USA)2023-07-18
    75Homura 230517 GS(sse4.1 no-pop + bmi2)GSEllie Moore (USA)2023-05-21
    74Carp 1.2 +1.3 GS(sse4.1 no-pop)GSAndrea Sgobbi (ITA)2023-02-19
    73Camel 0.3.1 GS(sse4.1 no-pop)GSBruno Mendes (PRT)2023-02-08
    72Camel 0.2.0 GS(sse4.1 no-pop)GSBruno Mendes (PRT)2023-01-31
    71(*)Halcyon 0.2 GS(sse4.1 no-pop)GSNicholas Hamilton (USA)2023-01-31
    70Black-Cat 1.2a - 2.3 GS(sse4.1 no-pop)GSAlexander Wimmer (FRA)2022-12-04
    69Luna 0.2.1 GSdefault (debug + release)GSThomas Mergener (BRA)2022-10-24
    68Swordfish 0.1.0defaultGSPatrick Huang (USA)2022-08-19
    67MisterQueen 2014-11-26no popcount/sse4.1 (two versions s. readme)GSMichael Fogleman (USA)2022-04-02
    66Naum (free versions 1.0 - 2.0)originalAlex Naumov (CAN)2022-04-02
    65Chengine r38original + various new buildsLC+GSHenning Sperr (DEU)2022-04-02
    64Keele 1.0dev GSold, sse3+pop, bmi, bmi2GSMartin Wyngaarden (USA)2022-02-15
    63Kingfisher 1.2dev r59 GSoldGSEric Yip (HKG)2022-02-02
    62Thinker collection (4.2m - 5.4d)originalLance Perkins (CAN)2022-01-10
    61Monchester 1.0.1-18ssse3, amd10, haswellGSTaimo Peelo (EST)2022-01-07
    60(*)ECE 0.1 - 20.1originalLuigino Viscione (ITA)2022-01-02
    59Sachy 0.2.05 RCcore2, amd10GSMartin Macok (CZE) modified by Roland Chastain2021-12-21
    58Kengine 1.0.2 r19defaultGSBen-Hur Carlos Langoni Junior (BRA)2021-12-11
    57DeepChess r113core2, popcount, avx2, amd10GSAdam Jedrych (POL)2021-05-21
    56Isa 2.0.83originalDaniel Anuliero (FRA)2021-05-11
    55Isa 1.9.51 - 2.0.61 + BookoriginalDaniel Anuliero (FRA)2021-05-11
    54Robocide 0.464-bit (Cygwin)TMDaniel White (GBR)2021-05-11
    53Robocide 2017071832 and 64-bit (Cygwin)TMDaniel White (GBR)2021-05-11
    52Invictus r324ssse3, amd10, sandy, ivy, nehalem, bdver1GSEdsel Apostol (PHL)2021-05-11
    51SamChess 0.1RCssse3GSJonathan Kreuzer (USA)2021-05-05
    50Megalodon 1.0.0ssse3, amd10 and bmi2GSPatrick Huang + Arjun Sahlot (USA)2021-04-15
    49Micah 1.0, 0.10, 0.9, 0.8, 0.5originalFolkert van Heusden (NLD)2021-04-13
    48Embla 2.07, 2.06, 2.00, 1.03, 1.02, 1.01, 0.991, 0.91originalFolkert van Heusden (NLD)2021-04-13
    47CPP1 0.1038originalFolkert van Heusden (NLD)2021-04-13
    46Megalodon 0.4.3ssse3, amd10 and bmi2GSPatrick Huang + Arjun Sahlot (USA)2021-04-13
    45Megalodon 0.3.2old, bmi2GSPatrick Huang + Arjun Sahlot (USA)2021-04-01
    44Rodent IV 0.30old, amd10 and bmi2GSPawel Koziol (POL) & Bernhard C. Maerz (DEU)2021-03-30
    43Snowy 0.1old-64?Jason Creighton (USA)2021-03-20
    42Feeks 180109 + 180926 binariesdefaultLMFolkert van Heusden (NLD)2021-03-19
    41Crafty 25.6old-64MBRobert Hyatt (USA)2021-03-08
    40(*)Pigeon 1.51 fix (MS)sse4.1/np, ssse3/np, ssse3/p, avx2/bmi2GSStuart Rifles (USA)2021-03-04
    39Nemorino 6.05ssse3, amd10, avx2/bmi2, avx2GSChristian Guenther (DEU)2021-02-03
    38Cheops 1.3 HKdefaultHKTristan Miller (CAN)2021-02-03
    37Spartan 1.0-64sse4.1/np, amd10, bmi2GSChristian Daley (USA)2021-01-26
    36Clever Girl r185old, amd10, bmi2GSSeth Kasmann (USA)2021-01-26
    35(*)Gunborg 1.65sse4.1/np, amd10, bmi2GSTorbjörn Nilsson (SWE)2022-01-02
    34Achillees 1.01old, amd10, bmi2GSDaniel Diaz (ESP)2021-01-26
    33Claudia 0.51sse4.1/np, amd10, avx2GSAntonio Garro (ESP)2021-01-26
    32Floyd 0.5 - 0.9originalMarcel van Kervinck (NLD)2021-01-16
    31Delocto_200419various buildsGSMoritz Terink (AUT)2021-01-14
    30Iathena (5.20) + 20200505old,amd10,avx2GSTimothee Schmoderer (FRA)2020-12-19
    29Monochrome rev203old +amd10GSBrades/Charan/Koskeridis/*Taylor2020-12-19
    28Chareth 0.1.0 (r182)oldGSJohn Mc Farland (USA)2020-12-15
    27Rasch r142oldGSIngo Wechsung (DEU)2020-12-15
    26Chessier 0.1.0 (r75)oldGSAndrew Chien (USA)2020-12-15
    25Haddock 0.2.1 devoldGSHans Blom (NLD)2020-12-15
    24Rasher r380oldGSMorten Lohner (NOR)2020-12-15
    23RamJet all versions (0.9 - 0.14+src)originalEdoardo Manino (ITA)2020-12-10
    22KingSlayer 1.00defaultGSHarm-Geert Muller (NLD)2020-11-16
    21Quokka 2.1defaultGSMatt Palmer (USA)2020-11-15
    20N.E.G. 1.3bdefaultGSHarm-Geert Muller (NLD)2020-11-15
    19Monchester 0.99 + 0.99-D5default (clang)GSTaimo Peelo (EST)2020-11-04
    18Chess-At-Nite 12.12.25defaultGSDomig, Lipiridis, Petrik, Tuong2020-10-12
    17Defenchess 2.3 devbmi2, avx2 and oldGSCan Cetin & Dogac Eldenk (TUR)2020-09-16
    16Koivisto 1.0 and 2.0bmi2 and oldGSFinn Eggers (DEU) & Kim Kahre (FIN)2020-09-09
    15Neocortex 1.0 + nps fixvarious buildsGSJustin Stanley (USA)2020-09-07
    14Yace 0.9987 + 0.9986boriginalDieter Buerssner (DEU)2020-08-16
    13Dorpsgek various versionsoriginalMatthew Brades (GBR)2020-07-26
    12ProChess 1.02ADoriginalEdoardo Manino (ITA)2020-04-17
    11Stash 8.1.4 GSavx2 + popMorgan Houppin (FRA)2020-02-17
    10Delocto_06devno popcnt sse4.1GSMoritz Terink (AUT)2020-01-01
    9Senpai 2.0x64no popcntTMFabien Letouzey (FRA)2019-12-23
    8SmallPotato 0.70TMAlejandro Dubowski (AUS)2019-12-23
    7RubiChess versions 0.5/0.6/0.7TMAndreas Matthies (DEU)2019-12-23
    6Gromit 2.13 + 2.20originalFrank Schneider (DEU)2019-12-17
    5FreeChess versions 2.16a 2.16e 2.17bunpacked! (no virus alarm!)GSIvan Maklyakov (RUS)2018-10-17
    4Aldebaran 0.70originalMauro Scarpa (ITA)2018-06-13
    3Nebiyu 1.45aoriginalDaniel Shawul (ETH)2018-06-13
    2Tornado 25 versions from 0.8017b - final 8originalEngin Uestuen (DEU)2018-06-13
    1Nemeton, Neurosis, Neurosis3D & StansChess older programs/versionsoriginalStan Arts (NLD)2017-12-20