One score is useful only when its measurement conditions travel with it. Luna is terminal and likelihood-rated. DeepSeek remains a clean-only live readout—not a finished Elo claim.
Evidence snapshotAugust 5, 2026 at 5:12 AM UTC
Ranked by joint local Elo
Luna
Terminal cohort
01
top2
Top 2
2 randomized, unranked proposals
Local protocol Elo28322680–2992 profile 95%
Clean W–D–L41–11–860 across all visited anchors · 78% score
Clean W–D–L2–2–610 across all visited anchors · 30% score
Current anchor13202–2–6 · 30% · N=10
Terminal · frozenVisited 13200 provider-error records excluded
05
regular
Regular
No engine proposals
Local protocol Elo1067705–1351 profile 95%
Clean W–D–L0–5–510 across all visited anchors · 25% score
Current anchor13200–5–5 · 25% · N=10
Terminal · frozenVisited 13200 provider-error records excluded
Candidate-width fingerprint
The curve runs backward.
Among candidate-assisted conditions, the observed point estimate rises as the visible set narrows. Select a point to inspect the uncertainty—not just the line.
Shared vertical scale · interval bars show profile 95% · line joins point estimates only
Top 101127Local protocol Elo
Profile 95%805–1407Frozen Davidson WDL likelihood
Estimate input2–2–610 clean games at the synthesis cutoff
Frozen Luna evidence. These protocol-specific estimates do not identify a candidate-count effect: sets were separately generated, games were unpaired, and anchors were adaptive.
Measurement contract
Same harness. Visible boundaries.
Opponent
Stockfish 18 with UCI LimitStrength
Colors
LLM always Black; no color-balanced claim
Clock
0.1 seconds per Stockfish move
Game limit
200 plies maximum
Reasoning
high effort
Candidate display
randomized; scores and ranks hidden
How to read this page
Four boundaries prevent a number from becoming a myth.
04
01
These are local protocol-specific measurements, not FIDE, online-platform, or general model ratings.
02
Anchors were selected adaptively. Earlier blocks remain part of the frozen Luna likelihood.
03
DeepSeek has no published Elo until its suites are terminal and the joint likelihood is frozen.
04
Candidate conditions are complete agent protocols, not isolated estimates of base-model chess strength.
W-D-L and scores include clean completed games only; provider-error records are excluded.