Round 4 · 1971

Circuit Park Zandvoort

Zandvoort, Netherlands · June 20, 1971 · Circuit History · Wikipedia

Kings of this circuit
The race, in perspective

Race debrief

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

R041971
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23 stored results 23/23 Elo snapshots 23/23 numbered grid slots 0/23 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.

0/23 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.

0/23 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 → P23vs expectedReading
J. IckxFerrari #12406 No error range P1 Not assessedQualifying unavailable
P. RodríguezBRM #52225 No error range P2 Not assessedQualifying unavailable
C. RegazzoniFerrari #92155 No error range P3 Not assessedQualifying unavailable
R. PetersonMarch-Ford #72182 No error range P4 Not assessedQualifying unavailable
J. SurteesSurtees #102143 No error range P5 Not assessedQualifying unavailable
J. SiffertBRM #201965 No error range P6 Not assessedQualifying unavailable
H. GanleyBRM #191981 No error range P7 Not assessedQualifying unavailable
G. van LennepSurtees #16.52000 No error range P8 Not assessedQualifying unavailable
J. BeltoiseMatra #62187 No error range P9 Not assessedQualifying unavailable
G. HillBrabham #211949 No error range P10 Not assessedQualifying unavailable
J. StewartTyrrell #22359 No error range P11 Not assessedQualifying unavailable
D. HulmeMcLaren #32346 No error range P12 Not assessedQualifying unavailable
H. PescaroloMarch-Ford #82165 No error range NCNot classified Not assessedQualifying unavailable
S. BarberMarch-Ford #221916 No error range NCNot classified Not assessedQualifying unavailable
P. GethinMcLaren #152041 No error range NCNot classified Not assessedQualifying unavailable
A. Soler-RoigMarch-Ford #231811 No error range DNFEngine Not assessedQualifying unavailable
T. SchenkenBrabham #122106 No error range DNFSuspension Not assessedQualifying unavailable
F. CevertTyrrell #142050 No error range DNFAccident Not assessedQualifying unavailable
R. StommelenSurtees #112106 No error range DSQDisqualified Not assessedQualifying unavailable
R. WisellLotus-Ford #132105 No error range DSQDisqualified Not assessedQualifying unavailable
M. AndrettiFerrari #181994 No error range DNFFuel pump Not assessedQualifying unavailable
D. WalkerLotus-Pratt & Whitney #16.52000 No error range DNFAccident Not assessedQualifying unavailable
C. AmonMatra #42286 No error range DNFSpun off 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 gain

Siffert+110.3 Elo

Largest Elo loss

Amon−176.4 Elo

Largest grid-to-finish gain

van Lennep+13 places

The bigger picture

Championship after this round

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

  1. 1 Stewart 24pts 0
  2. 2 Ickx 19pts 0
  3. 3 Andretti 9pts 0
  4. 4 Rodríguez 9pts +4
  5. 5 Peterson 9pts −1

Movement since round 3. 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.

Matra

BeltoiseP9+8.1 Elo
AmonDNF−176.4 Elo

Non-finish recorded; no finishing gap comparison.

Brabham

HillP10+70.4 Elo
SchenkenDNF−55.9 Elo

Non-finish recorded; no finishing gap comparison.

Tyrrell

StewartP11−60.5 Elo
CevertDNF−49.4 Elo

Non-finish recorded; no finishing gap comparison.

McLaren

HulmeP12−68.6 Elo
GethinNC−13.0 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 →
23
Result Entries
Avg Elo
Highest Elo (Ickx)
11
Non-finishes

Race

Qualifying

# Driver Grid +/- Points Season Pts Season # Elo Change Elo
P1 🇧🇪 J.Ickx 1 +9 19 P2 +41.3 2,447
P2 🇲🇽 P.Rodríguez 2 +6 9 P4 +75.0 2,300
P3 🇨🇭 C.Regazzoni 4 +1 +4 8 P6 +85.0 2,240
P4 🇸🇪 R.Peterson 13 +9 +3 9 P5 +65.3 2,248
P5 🇬🇧 J.Surtees 7 +2 +2 2 P10 +66.3 2,210
P6 🇨🇭 J.Siffert 8 +2 +1 1 P14 +110.3 2,076
P7 🇳🇿 H.Ganley 9 +2 0 0 P15 +94.5 2,076
P8 🇳🇱 G.van Lennep 21 +13 0 0 P20 +77.7 2,078
P9 🇫🇷 J.Beltoise 11 +2 0 1 P12 +8.1 2,195
P10 🇬🇧 G.Hill 16 +6 0 0 P22 +70.4 2,019
P11 🇬🇧 J.Stewart 3 -8 0 24 P1 -60.5 2,299
P12 🇳🇿 D.Hulme 14 +2 0 6 P8 -68.6 2,277
NC 🇫🇷 H.Pescarolo 15 0 0 P18 -29.9 2,135
NC 🇺🇸 S.Barber 24 0 0 P24 +34.5 1,951
NC 🇬🇧 P.Gethin 23 0 0 P19 -13.0 2,028
DNF 🇪🇸 A.Soler-Roig 17 0 0 P25 +36.8 1,848
DNF 🇦🇺 T.Schenken 19 0 0 P21 -55.9 2,050
DNF 🇫🇷 F.Cevert 12 0 0 P16 -49.4 2,001
DSQ 🇩🇪 R.Stommelen 18 0 1 P13 -78.3 2,028
DSQ 🇸🇪 R.Wisell 4 0 3 P9 -89.1 2,016
DNF 🇺🇸 M.Andretti 16 0 9 P3 -65.5 1,928
DNF 🇦🇺 D.Walker 22 0 0 P29 -78.5 1,921
DNF 🇳🇿 C.Amon 5 0 6 P7 -176.4 2,109

Qualifying results are not available for this race.

Elo Changes