The Comeback Machine
Carlus Mansen, known online as Marcoco18, has spent more than eight years turning a modest beginning into one of the most active profiles on the platform. Mansen started 2018 with a blitz rating near 924 and a single bullet game at 800, then went on to play more than 10,900 games across every time control. By August 2026 the Rapid rating reached 2064 (2026-08-01), and the Blitz ceiling climbed to 1910 (2026-07-21). The climb was anything but smooth: it includes a 15 game winning streak, a 12 game losing streak, and a comeback rate of 79.6%.
A Shape Shifting Opening Repertoire
Mansen's opening choices tell a story of constant reinvention. In 2018, 1.e4 ruled his white games; by 2022, 1.d4 had taken over; and by 2025 and 2026, the Nimzo-Larsen Attack with 1.b3 became a signature weapon. He has played hundreds of games in that opening, while also showing deep loyalty to the Sicilian Defense with the black pieces. The Australian Defense, the Dory Defense, and even the Siberian Attack appear throughout his records, which gives the repertoire a creative and slightly chaotic feel.
Mansen wins with both colors: 52.9% as White and 51.0% as Black, and his games tend to go deep. The average win lasts around 68 moves, while the average loss lasts about 71, which points to a player who fights well into the endgame.
Friendly Feuds
No biography of Marcoco18 would be complete without il-bobby, his most frequent opponent with 120 meetings. That rivalry has been tough, with il-bobby winning 88 of those games. Against fabio zennaro, however, Mansen has been the boss, taking 66 wins from 94 encounters. The contrast defines his match play: dangerous against some, haunted by others.
Speed and Resilience
Bullet is the preferred habitat. Mansen has played more than 4,200 bullet games and over 5,000 blitz games, which makes the clock part of the fun. His best winning hour is 06:00, when the win rate jumps to 61.5%, while games after 01:00 are best avoided. He also carries a 71% early resignation rate, which sounds negative until you remember the comeback rate: when he loses a piece, he still wins 48.4% of the time. Mansen knows when to fold, and he knows when to keep fighting.
- More than 10,900 rated games played
- Longest winning streak: 15
- Longest losing streak: 12
- First to check wins 60.2% of the time