Changes

a [https://en.wikipedia.org/wiki/ROM_cartridge ROM cartridge] [[:Category:Console|video chess game]] by the now defunct German electronics manufacturer [https://en.wikipedia.org/wiki/SABA_%28electronics_manufacturer%29 SABA] for the [https://en.wikipedia.org/wiki/Fairchild_Channel_F Fairchild Channel F] and licensed [https://en.wikipedia.org/wiki/Video_game_console video game consoles] with [[Fairchild F8|F8]] processor, such as the ''SABA Videoplay'' <ref>[https://www.videospielgeschichten.de/debuet-fuer-die-steckmodule/ SABA Videoplay - Debüt für die Steckmodule] by [https://www.videospielgeschichten.de/author/torsten-othmer/ Torsten Othmer], October 2009 (German)</ref>.

today available as [https://en.wikipedia.org/wiki/Disassembler disassembled] source code, is playable under the [https://en.wikipedia.org/wiki/Multi_Emulator_Super_System Multi Emulator Super System MESS] <ref>[http://channelf.se/veswiki/index.php?title=Disassembly:SABA_Videoplay_20 Disassembly: SABA Videoplay 20 - veswiki] playable in [https://en.wikipedia.org/wiki/Multi_Emulator_Super_System MESS] under [https://en.wikipedia.org/wiki/Fairchild_Channel_F Channel F]</ref>. The game has four difficulty levels, where it turns in a matter of seconds in the easiest level until up to 50 minutes in the highest difficulty.To allow the player to watch something else on the TV while the system is busy, the game cart indicates its "thinking" state with a [https://en.wikipedia.org/wiki/Light-emitting_diode led] <ref>[https://www.mobygames.com/game/videocart-20-schach Videocart-20: Schach for Channel F (1979)] - [https://en.wikipedia.org/wiki/MobyGames MobyGames]</ref>.