Gull II, the chess engine by Vadim Demichev, is the sole leader of TCEC computer championship. After four rounds Gull has collected 3,5/4 and is half a point ahead of competition. So far Gull has three victories – against Dirty, Critter, and Spike and a draw with Chiron.
Gull is closely followed by five engines with 3,0/4. Among them is Houdini 3 with two victories and two draws. After a shaky start, Houdini recovered in the best possible way after beating Stockfish with black in a 101 moves thriller. Other engines sharing second position are the second seeded Komodo, Hiarcs 14.0b, Chiron 1,5, Rybka 4.1, and Vitruvius.
In the group with 2,5/4 points, we find some of the top competitors as the third seeded Critter, by Richard Vida, rated 3104 ELO, as well as a well performing Scorpio 2.75 rated only at 2794 ELO.
The lowest scoring 3000+ engine so far – Equinox, started recovering with a victory against Crafty, and now stands at 2,0/4.
TCEC report round 1 / TCEC report round 2 / TCEC report round 3 / TCEC report round 4
Official website / Replay all games with analysis
Standings
| Engine | ELO | Points | |
| 1 | Gull II | 3083 | 3.5 |
| 2 | Houdini 3 | 3191 | 3 |
| 3 | Chiron | 2990 | 3 |
| 4 | Komodo | 3126 | 3 |
| 5 | Hiarcs 14.0b | 2970 | 3 |
| 6 | Rybka 4,1 | 3101 | 3 |
| 7 | Vitruvius | 3070 | 3 |
| 8 | Critter 1.6a | 3104 | 2.5 |
| 9 | Shredder | 2960 | 2.5 |
| 10 | Scorpio | 2787 | 2.5 |
| 11 | Stockfish | 3086 | 2.5 |
| 12 | Spike | 2926 | 2.5 |
| 13 | Hannibal | 2955 | 2.5 |
Where’s Rybka?