The Fighter. The greatest player never to become World Champion. Defected from the USSR and fought Karpov in two legendary matches.
One-time purchase · Windows download · UCI compatible · works offline · instant download after purchase
The browser version lets you meet the personality before buying. The installed engine plays locally, in CZUBATRONIC 2400 and your own chess software, with the full personality model.
Korchnoi takes what you offer and defends it. He accepts material, absorbs pressure and keeps finding resources in positions most players would quietly give up on, and then he counterattacks with real force.
Beating him requires proof. A promising attack is not enough; he will defend for as long as it takes and punish the first moment your initiative runs out of genuine threats.
Regular games against Korchnoi build endurance. You learn to press an advantage without overextending, to keep your nerve through long resistance and to respect defence as an active weapon. Few opponents in the catalogue teach you more about finishing games.
A single game shows part of the personality. Repeated games reveal more: you begin to recognise familiar structures, recurring plans and the kinds of positions this opponent prefers. That is where the collection becomes interesting, because different personalities put different questions to your chess.
Viktor Korchnoi was the fiercest competitor in chess history. He defected from the Soviet Union in 1976 and fought Anatoly Karpov in two World Championship matches that were as much Cold War drama as chess, the KGB surveilled his team, a parapsychologist was deployed against him, and his family was held hostage in the USSR. He lost both matches narrowly but never stopped fighting. He remained in the world top 20 into his 60s and played competitive chess until 2012, aged 81. His tenacity was legendary: Korchnoi would defend lost positions for 80 moves just to make his opponent prove they could win. His style combined deep defensive skill with explosive counterattacking ability.
Notable: Played competitive chess across seven decades. Four-time Soviet Champion. The oldest player ever to defeat a reigning world top-10 player (at age 75).
| Era | Soviet Era |
| Years | 1931–2016 |
| Peak rating | 2695 |
| Born | Leningrad, USSR, 1931 |
| Title | World Championship Challenger (1978, 1981) |
| Style | Tenacious defense, fierce counterattacks, iron willpower, fighting spirit |
The ChessGate personality of Korchnoi, reconstructed from the historical player's games, with their own style, their own plans and their own idea of chess. A chess partner with real character, at any level, whenever you like. Play it inside CZUBATRONIC 2400 and the built-in Coach can flag weak moves and show a stronger one. The engine runs offline on your machine, in CZUBATRONIC 2400 and any UCI chess interface.
| File | ChessGate_Kortschnoj.exe · 51 MB |
| Runs in | CZUBATRONIC 2400 (as an external engine) and any UCI chess interface |
| Requirements | Windows 10 / 11, 64-bit; any UCI chess interface; CZUBATRONIC 2400 lists it as an external engine |
| Delivery | Instant download after purchase. Installer, no administrator rights; if CZUBATRONIC 2400 is installed, the personality registers itself there as an engine. |
| Works offline | Yes. No account, no server. |
| Packs | – |
| Collection | Complete Personality Collection |
| In the browser | A lighter version of ChessGate Korchnoi plays on ChessGate. |