3x3 Speedcubing: The Ultimate Limits Forecast
History · Methods · Hardware · Math · Biomech · Top Cubers · Training · Statistics — toward a single & average forecast.
Final Forecast — Single + Ao5 (BMA Ensemble)
Single WR Forecast
2026 now2.76 sZajder
20272.55[2.40–2.70]
20302.30[2.05–2.55]
20352.05[1.80–2.30]
20401.90[1.65–2.15]
20501.70[1.45–1.95]
100-yr~1.50method-reachable
wall~0.9916 STM × 17 TPS
Ao5 WR Forecast
2026 now3.71 sGeng
20273.45[3.30–3.60]
20303.00[2.75–3.25]
20352.65[2.40–2.90]
20402.40[2.15–2.65]
20502.15[1.90–2.40]
asymptote~1.90execution-noise floor
Methodology. BMA ensemble (GEV 0.55 + Exp-floor 0.30 + Gompertz 0.15), 80% CI from residual bootstrap. Ao5/single ratio from σ_log = 0.10-0.12 + Ao5 trimmed-mean √5 shrinkage; top same-round Ao5/min-single ≈ 1.25-1.35. Lower bounds capped at physical floor 0.99 s and Ao5 1.9 s.
Forecast Confidence Band
WR Single (actual)Ensemble medianWR Ao5 (actual)Ensemble median (Ao5)
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