The Mobile Chess Engine Circuit (MCEC) is a passion-driven, hobbyist Android tournament inspired by elite desktop events like TCEC and the Chess.com Computer Chess Championship (CCC).Born out of curiosity, MCEC explores a fascinating question: How do the world's strongest chess engines actually perform when constrained to a practical, daily-use mobile phone?
Unlike massive desktop server setups that brute-force thousands of games overnight, MCEC games are run selectively during free time when the device is available. It is a real-world, practical exploration of software efficiency under strict resource limits.
MCEC Circuit History• Season 1 (Completed & Success): Established the core structural proof-of-concept for high-stakes mobile tournament ladders on everyday hardware. The format proved highly competitive and successfully ranked our original mobile engine pool.
• Season 2 (Halted / Stopped): Due to technical adjustments, real-world scheduling limitations, and the evolution of the mobile engine landscape, Season 2 was prematurely stopped to recalibrate the entire ecosystem.
• Season 3 (Now Beginning!): Rebuilt, optimized, and officially launching. Season 3 implements an expanded 72-engine baseline benchmark, strict stability filters, and a clean CCC-style tier framework to accommodate powerful newcomers.
Tournament Goals & Focus• The Low-End Gauntlet: To document how elite, world-class chess engines scale down and perform under limited mobile resources.
• Elite Threshold: Exclusively features the strongest open-source chess engines capable of reaching 3300+ Elo environments.
• The Stability Filter: MCEC is as much about compatibility, stability, and efficiency as it is about raw strength. Engines must handle mobile thermal conditions and OS constraints without crashing.
• Performance Tracking: Rather than calculating official Elo ratings (due to the practical limits of resource-constrained testing), MCEC focuses on head-to-head performance data, structural stability, and mobile win-probabilities.
MCEC Technical Specifications, Settings & AdjudicationAll games are strictly monitored and conducted under identical, controlled conditions. To ensure games run efficiently on mobile hardware without wasting battery on dead-drawn or completely decided positions, the tournament utilizes strict GUI Adjudication Rules:
Setting / RuleConfiguration / Value
Current Stage
Season 3 — Structural Benchmark Phase
Hardware:
Samsung A16 5G (Daily-use personal phone)
Time Control (TC):
1+1 (1 minute base + 1 second increment)
Processor Allocation1 Core / 1 Thread (To isolate single-core efficiency)
Graphical Interface:
ChessEnginesTournament
Opening Book:
UHO Stefan Pohl Book
Engine Settings:
Strict Defaults
Syzygy Tablebases:
Disabled (False)
Pondering:
Disabled (False)
Max Moves per Game:
160 moves
Moves to Start Rules:
40 moves
Fast Win Score:
20.00
Win Score (Greater than):
10.00
Plies to Win:
10 plies
Draw Score:
0.08
Plies to Draw:
10 plies
Special AcknowledgmentsMCEC would not be possible without the incredible support and dedication of the computer chess community. Heartfelt thanks go to:
• The Engine Developers:
The brilliant minds behind the open-source codebases pushing the boundaries of chess science.
• Jim Ablett:
For his high-performance Android engine builds form the absolute backbone of this circuit.
• Archimedes:
For his highly-optimized Android engine compilations.
• Stefan Pohl:
For his outstanding UHO (Unbalanced Human Opening) Books, which provide the perfect, mathematically balanced testing ground to push these engines to their tactical limits.
Our MissionMCEC is ultimately a passion-project driven by curiosity, learning, and a profound appreciation for computer chess. It operates strictly as a casual, long-term testing sandbox run entirely in my spare time on independent, everyday consumer mobile hardware.
Phase 1: The Play-In Matches (The Gateway)
Phase 2: The League Tiers (The Ascent)
Phase 3: The Championship Stages (The Elite)