Round 11 · 1991

Circuit de Spa-Francorchamps

Spa, Belgium · August 25, 1991 · Circuit History · Wikipedia

Kings of this circuit
The race, in perspective

Race debrief

What did we expect after qualifying—and who beat it?

R111991
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34 stored results 34/34 Elo snapshots 26/34 numbered grid slots 0/34 qualifying results
Elo × qualifying → race result

Did they beat the expectation?

A strong driver recovering from a poor qualifying position isn't automatically a surprise. This model estimates a finish from both inputs, then compares it with what happened.

Experimental · v1

Expected finish assumes a classified finish. DNFs stay in the full grid but receive no performance verdict. Qualifying is not the starting grid; grid differences are flagged, not silently substituted.

This race has insufficient earlier history: 0/20 races and 0/200 classified finishes with Elo and qualifying. Estimates are withheld.

0/34 entrants have an estimate. Missing Elo or qualifying stays visible below; a grid position is not used as a qualifying result.

Top 3

Beat the estimate

No comparable estimates available for this race yet.

Flop 3

Below the estimate

No comparable estimates available for this race yet.

0/34 entrants assessed. Up to three per side, ranked by expected minus actual finish. DNFs, missing estimates and gaps rounding to 0.0 are excluded. “Flop” means below the model's estimate—not poor driving. A ranked gap can still be inside the usual error range.

Full grid: pre-race Elo rank, qualifying position, estimated finish, actual result and difference from expectation. Positive differences mean finishing ahead of the estimate.
DriverPre-race EloQualifyingExpectedResultP1 ← position → P34vs expectedReading
A. SennaMcLaren #22502 No error range P1 Not assessedQualifying unavailable
G. BergerMcLaren #62321 No error range P2 Not assessedQualifying unavailable
N. PiquetBenetton #102235 No error range P3 Not assessedQualifying unavailable
R. MorenoBenetton #82264 No error range P4 Not assessedQualifying unavailable
R. PatreseWilliams #32395 No error range P5 Not assessedQualifying unavailable
M. BlundellBrabham #212148 No error range P6 Not assessedQualifying unavailable
J. HerbertTeam Lotus #142175 No error range P7 Not assessedQualifying unavailable
E. PirroDallara #232093 No error range P8 Not assessedQualifying unavailable
M. BrundleBrabham #222125 No error range P9 Not assessedQualifying unavailable
O. GrouillardFondmetal #301857 No error range P10 Not assessedQualifying unavailable
T. BoutsenLigier #92246 No error range P11 Not assessedQualifying unavailable
P. MartiniMinardi #132178 No error range DNFGearbox Not assessedQualifying unavailable
A. de CesarisJordan #52327 No error range DNFEngine Not assessedQualifying unavailable
S. ModenaTyrrell #72279 No error range DNFOil leak Not assessedQualifying unavailable
J. JärvilehtoDallara #202150 No error range DNFOil pressure Not assessedQualifying unavailable
J. AlesiFerrari #42348 No error range DNFEngine Not assessedQualifying unavailable
G. MorbidelliMinardi #192155 No error range DNFGearbox Not assessedQualifying unavailable
M. HäkkinenTeam Lotus #172161 No error range DNFEngine Not assessedQualifying unavailable
É. ComasLigier #182155 No error range DNFEngine Not assessedQualifying unavailable
N. MansellWilliams #12513 No error range DNFElectrical Not assessedQualifying unavailable
É. BernardLola #242073 No error range DNFGearbox Not assessedQualifying unavailable
I. CapelliLeyton House #162164 No error range DNFEngine Not assessedQualifying unavailable
S. NakajimaTyrrell #122188 No error range DNFSpun off Not assessedQualifying unavailable
A. ProstFerrari #112232 No error range DNFFuel leak Not assessedQualifying unavailable
M. GugelminLeyton House #152175 No error range DNFEngine Not assessedQualifying unavailable
M. SchumacherJordan #262000 No error range DNFClutch Not assessedQualifying unavailable
A. SuzukiLola #252054 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
N. LariniLambo #281921 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
A. CaffiFootwork #291867 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
E. van de PoeleLambo #331782 Grid unnumbered No error range DNQDid not qualify Not assessedQualifying unavailable
M. AlboretoFootwork #271968 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
G. TarquiniAGS #311835 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
P. ChavesColoni #341662 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
F. BarbazzaAGS #321800 Grid unnumbered No error range DNQDid not prequalify Not assessedQualifying unavailable
How useful is the model? See the historical check

There is not enough earlier history for a rolling hold-out check yet.

The range scales the 80th percentile of earlier held-out absolute errors to this field size, rounding outward. It is an empirical error guide, not a guaranteed 80% chance for a particular driver. We require at least five checked races and 100 checked finishes before showing it.

Inputs are field-normalised Elo rank and qualifying position. The target is position among all race entries, trained only on classified finishers. Estimates are averages, not a unique predicted finishing order. Penalties, the circuit, weather, incidents and strategy aren't model inputs. Historical qualifying coverage is patchy; this is an exploratory backtest on corrected records, not proof of live forecasting accuracy.

The rating ledger

What changed in Elo?

These are actual rating changes. The expectation model above does not change Elo or fantasy scoring.

Largest Elo loss

Mansell−92.5 Elo

Largest grid-to-finish gain

Pirro+17 places

The bigger picture

Championship after this round

Top five in the stored standings. Points include sprint results where applicable.

  1. 1 Senna 71pts 0
  2. 2 Mansell 49pts 0
  3. 3 Patrese 34pts 0
  4. 4 Berger 28pts 0
  5. 5 Piquet 22pts +1

Movement since round 10. A dash means the earlier standing is unavailable.

Explore the season →
Across the garage

Teammate results

Two-driver constructor entries from this race. A result comparison, not an adjustment for strategy or reliability.

Ligier

BoutsenP11+13.8 Elo
ComasDNF−14.6 Elo

Non-finish recorded; no finishing gap comparison.

Ferrari

AlesiDNF−39.9 Elo
ProstDNF−64.5 Elo

Non-finish recorded; no finishing gap comparison.

Lola

BernardDNF−7.3 Elo
SuzukiDNQ−40.5 Elo

Non-finish recorded; no finishing gap comparison.

AGS

TarquiniDNQ−28.1 Elo
BarbazzaDNQ−35.2 Elo

Non-finish recorded; no finishing gap comparison.

What this analysis can—and cannot—tell you

This debrief is calculated from stored results and rating snapshots. The experimental expectation model learns from earlier races only, using Elo rank and qualifying together; it never feeds back into Elo. It is not a separately reviewed race report.

Elo uses the result order, including retirements. It does not isolate driver skill from the car, reliability, penalties or strategy. Elo seed comparisons use pre-race ratings, never today's ratings. Equal ratings share the midpoint of their rank range (for example, tied first and second become seed 1.5).

Grid gains use numbered starting slots and classified finishes only. Zero or missing grid values are excluded; a position gained is not necessarily an overtake. Qualifying gaps use the latest segment both teammates have a valid time for, never Q1 against Q3.

Lap-by-lap pace, tyre stints, pit-stop execution and safety-car effects are not available in this report. Missing data is omitted, not inferred.

Read the Elo methodology →
34
Result Entries
Avg Elo
Highest Elo (Senna)
23
Non-finishes

Race

Qualifying

# Driver Grid +/- Points Season Pts Season # Elo Change Elo
P1 🇧🇷 A.Senna 1 +10 71 P1 +28.0 2,530
P2 🇦🇹 G.Berger 4 +2 +6 28 P4 +53.4 2,374
P3 🇧🇷 N.Piquet 6 +3 +4 22 P5 +66.5 2,301
P4 🇧🇷 R.Moreno 8 +4 +3 8 P10 +53.3 2,318
P5 🇮🇹 R.Patrese 17 +12 +2 34 P3 +19.9 2,415
P6 🇬🇧 M.Blundell 13 +7 +1 1 P17 +68.7 2,216
P7 🇬🇧 J.Herbert 21 +14 0 0 P24 +55.7 2,231
P8 🇮🇹 E.Pirro 25 +17 0 1 P16 +69.3 2,163
P9 🇬🇧 M.Brundle 16 +7 0 0 P29 +55.3 2,181
P10 🇫🇷 O.Grouillard 23 +13 0 0 P31 +106.2 1,963
P11 🇧🇪 T.Boutsen 18 +7 0 0 P22 +13.8 2,259
DNF 🇮🇹 P.Martini 9 0 3 P13 +23.6 2,202
DNF 🇮🇹 A.de Cesaris 11 0 9 P9 -16.9 2,310
DNF 🇮🇹 S.Modena 10 0 9 P8 -12.6 2,266
DNF 🇫🇮 J.Järvilehto 14 0 4 P11 +11.8 2,161
DNF 🇫🇷 J.Alesi 5 0 14 P7 -39.9 2,308
DNF 🇮🇹 G.Morbidelli 19 0 0 P23 -2.0 2,153
DNF 🇫🇮 M.Häkkinen 24 0 2 P15 -9.8 2,151
DNF 🇫🇷 É.Comas 26 0 0 P27 -14.6 2,140
DNF 🇬🇧 N.Mansell 3 0 49 P2 -92.5 2,421
DNF 🇫🇷 É.Bernard 20 0 1 P18 -7.3 2,065
DNF 🇮🇹 I.Capelli 12 0 1 P19 -35.7 2,129
DNF 🇯🇵 S.Nakajima 22 0 2 P14 -47.7 2,140
DNF 🇫🇷 A.Prost 2 0 21 P6 -64.5 2,168
DNF 🇧🇷 M.Gugelmin 15 0 0 P25 -57.0 2,118
DNF 🇩🇪 M.Schumacher 7 0 0 P34 -22.0 1,978
DNQ 🇯🇵 A.Suzuki 0 0 1 P20 -40.5 2,013
DNQ 🇮🇹 N.Larini 0 0 0 P26 -18.2 1,902
DNQ 🇮🇹 A.Caffi 0 0 0 P35 -14.7 1,853
DNQ 🇧🇪 E.van de Poele 0 0 0 P30 -7.6 1,775
DNQ 🇮🇹 M.Alboreto 0 0 0 P33 -46.6 1,922
DNQ 🇮🇹 G.Tarquini 0 0 0 P28 -28.1 1,807
DNQ 🇵🇹 P.Chaves 0 0 0 P38 -12.2 1,650
DNQ 🇮🇹 F.Barbazza 0 0 0 P36 -35.2 1,765

Qualifying results are not available for this race.

Elo Changes