Professor Calculus (GB)
Professor Calculus won one of 26 starts, the success coming in a Class 5 handicap hurdle at Taunton in Feb 2023 over 2m1f – 2m4f on good ground. The gelding, by Twilight Son out of Roslea Lady, finished 10 of 11 in a Class 5 handicap hurdle at Hereford in Oct 2023 when last raced off OR 84, 13lb below his highest ever mark of 97. He raced on turf in 25 of those starts.
- 1–26Wins / Runs
- 3.8%Strike rate
- 4 (15.4%)Placed
- +3.00£1 level staken=26 at SP
- 0.83Fair A/E n=26 · 0.69 incl. margin
- 97Highest OR
- 36dAvg between runs
A/E compares actual wins with what starting prices implied. "Fair" strips the bookmaker margin from the expectation, so favourites and longshots are judged on the same footing — figures near 1.00 mean the market priced this horse about right.
KTB Speed and Rating
Best recent Speed 106
How fast the horse ran, as points against the day-corrected standard time for its course and distance: 100 is the median GB Class 4 handicap winner on that code; one point is 0.1% of the standard time. A, B or C is how much the day's card could tell us, not how good the run was. What this means →
| Going | Runs | Best | Median | Since 22 Oct 2025 |
|---|---|---|---|---|
| Good | 9 | 106A | 86 | — |
| Good to Soft | 3 | 82B | 71 | — |
| Good to Firm | 1 | — | — | — |
| Distance | Runs | Best | Median | Since 22 Oct 2025 |
|---|---|---|---|---|
| 2m1f – 2m4f | 6 | 106A | 90 | — |
| 1m5f – 2m | 6 | 104B | 80.5 | — |
| 2m5f – 3m | 1 | — | — | — |
| Going | Runs | Best | Median | Since 22 Oct 2025 |
|---|---|---|---|---|
| Good | 4 | 82A | 79.5 | — |
| Good to Firm | 3 | 93A | 72 | — |
| Standard (AW) | 1 | — | — | — |
| Soft | 1 | — | — | — |
| Distance | Runs | Best | Median | Since 22 Oct 2025 |
|---|---|---|---|---|
| 1m – 1m1f | 4 | 81C | 72.5 | — |
| 1m2f – 1m4f | 3 | 93A | 78 | — |
| 1m5f – 2m | 1 | — | — | — |
| 6f – 7f | 1 | — | — | — |
Of 26 runs looked at, 4 have no figure: did not complete (2) · obstacles omitted — the race ran a shortened course (2).
KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 22 figures from 26 runs · as at 3 Oct 2026 · a record, not a forecast
Both figures are KTB's own, computed from the archive; no vendor rating enters either. Every run's figure is on its form line below with its grade. Grades measure how much the archive could see, never the merit of the run.
Run style is derived from in-running commentary, which our data provider does not supply for this horse's races.
Pedigree intelligence
Progeny in our archive have won 9.6% of 3,643 runs since Jan 2008 (281 horses).
Strongest at trips under 6f (all codes): 12.6% from 613.
| Going | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Firm | 12 | 4 | 33.3% | +23.7 | — |
| Good to Firm | 651 | 71 | 10.9% | +1.3 | 0 from 4 |
| Good | 816 | 80 | 9.8% | +0.2 | 1 from 14 |
| Good to Soft | 302 | 23 | 7.6% | −2 | 0 from 4 |
| Soft | 329 | 37 | 11.2% | +1.6 | 0 from 2 |
| Heavy | 90 | 9 | 10% | +0.4 | 0 from 1 |
| Standard (AW) | 1,442 | 127 | 8.8% | −0.8 | 0 from 1 |
| Distance (all codes) | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Under 6f | 613 | 77 | 12.6% | +3 | — |
| 6f – 7f | 1,898 | 179 | 9.4% | −0.2 | 0 from 1 |
| 1m – 1m1f | 684 | 52 | 7.6% | −2 | 0 from 4 |
| 1m2f – 1m4f | 367 | 39 | 10.6% | +1 | 0 from 3 |
| 1m5f – 2m | 62 | 3 | 4.8% | −4.8 | 0 from 9 |
| 2m1f – 2m4f | 18 | 1 | 5.6% | −4 | 1 from 8 |
| 2m5f – 3m | 1 | 0 | 0% | −9.6 | 0 from 1 |
Flat and jumps together (all codes) · since Jan 2008 · as at 21 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast
10 siblings in the archive, 3 winners — best of them Royal Roslea (GB) (2 wins).
The wins came over 6f–1m4f; the highest grade won is Class 4 (Hoot (IRE)).
| Produce | Runs | Wins | Win trips | Best grade |
|---|---|---|---|---|
| Royal Roslea (GB) | 29 | 2 | 1m2f–1m4f | Class 6 |
| Tanseeq (GB) | 38 | 2 | 7f–1m | Class 5 |
| Hoot (IRE) | 4 | 1 | 6f | Class 4 |
| Pearl Bounty (IRE) | 4 | 0 | — | — |
| Capelena (GB) | 8 | 0 | — | — |
| Roselea Girl (GB) | 4 | 0 | — | — |
| Monadante (GB) | 4 | 0 | — | — |
| Roswood (GB) | 2 | 0 | — | — |
| Beautiful Firth (GB) | 2 | 0 | — | — |
| Cashmere Rose (GB) | 1 | 0 | — | — |
Record by conditions
| Going | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Good | 14 | 1 | 7% | +15.00 |
| Good to Firm | 4 | 0 | 0% | −4.00 |
| Good to Soft | 4 | 0 | 0% | −4.00 |
| Soft | 2 | 0 | 0% | −2.00 |
| Heavy | 1 | 0 | 0% | −1.00 |
| Standard (AW) | 1 | 0 | 0% | −1.00 |
| Class | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Class 5 | 20 | 1 | 5% | +9.00 |
| Class 4 | 4 | 0 | 0% | −4.00 |
| Class 6 | 2 | 0 | 0% | −2.00 |
| Course | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Taunton | 5 | 1 | 20% | +24.00 |
| Newton Abbot | 3 | 0 | 0% | −3.00 |
| Newbury | 3 | 0 | 0% | −3.00 |
| Hereford | 2 | 0 | 0% | −2.00 |
| Uttoxeter | 2 | 0 | 0% | −2.00 |
| Exeter | 2 | 0 | 0% | −2.00 |
| Leicester | 2 | 0 | 0% | −2.00 |
| Doncaster | 1 | 0 | 0% | −1.00 |
| Kempton (AW) | 1 | 0 | 0% | −1.00 |
| Windsor | 1 | 0 | 0% | −1.00 |
| Market Rasen | 1 | 0 | 0% | −1.00 |
| Warwick | 1 | 0 | 0% | −1.00 |
| Nottingham | 1 | 0 | 0% | −1.00 |
| Salisbury | 1 | 0 | 0% | −1.00 |
| Distance | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 1m5f – 2m | 9 | 0 | 0% | −9.00 |
| 2m1f – 2m4f | 8 | 1 | 13% | +21.00 |
| 1m – 1m1f | 4 | 0 | 0% | −4.00 |
| 1m2f – 1m4f | 3 | 0 | 0% | −3.00 |
| 2m5f – 3m | 1 | 0 | 0% | −1.00 |
| 6f – 7f | 1 | 0 | 0% | −1.00 |
| Jockey | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| David Noonan | 7 | 1 | 14% | +22.00 |
| Tom Buckley | 7 | 0 | 0% | −7.00 |
| Pat Dobbs | 3 | 0 | 0% | −3.00 |
| Kieren Buckley | 2 | 0 | 0% | −2.00 |
| Edward Rees | 1 | 0 | 0% | −1.00 |
| Angus Cheleda | 1 | 0 | 0% | −1.00 |
| Theodore Ladd | 1 | 0 | 0% | −1.00 |
| Frederick Larson | 1 | 0 | 0% | −1.00 |
| Thore Hammer Hansen | 1 | 0 | 0% | −1.00 |
| Andrea Atzeni | 1 | 0 | 0% | −1.00 |
| Rossa Ryan | 1 | 0 | 0% | −1.00 |
| Headgear | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| None | 13 | 0 | 0% | −13.00 |
| Tongue tie + visor | 5 | 1 | 20% | +24.00 |
| Tongue tie | 4 | 0 | 0% | −4.00 |
| Tongue tie + cheekpieces | 2 | 0 | 0% | −2.00 |
| Cheekpieces | 2 | 0 | 0% | −2.00 |
| Season | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 2023 | 10 | 1 | 10% | +19.00 |
| 2022 | 9 | 0 | 0% | −9.00 |
| 2021 | 7 | 0 | 0% | −7.00 |
| Type | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Hurdle | 15 | 1 | 7% | +14.00 |
| Flat | 9 | 0 | 0% | −9.00 |
| Chase | 2 | 0 | 0% | −2.00 |
Splits include every sample, however small — muted rows are under 3 runs. A one-from-one record is a fact, not a trend: read the Runs column before the strike rate.
Form
Quick answers
- How many races has Professor Calculus (GB) won?
- Professor Calculus (GB) won 1 of 26 archived starts between 2021 and 2023, a strike rate of 3.8%. Placed 4 times in total (15.4% of starts).
- Who trained Professor Calculus (GB)?
- Professor Calculus (GB) was trained by Nigel Hawke on the most recent run on record, at Hereford on 17 October 2023.
- Who is Professor Calculus (GB)'s sire?
- Professor Calculus (GB) is by Twilight Son (GB) out of Roslea Lady (IRE), whose sire is Alhaarth.
- What going does Professor Calculus (GB) prefer?
- Professor Calculus (GB) has the best record on good going: 1 win from 14 starts (7.1%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
- What is Professor Calculus (GB)'s official rating?
- The most recent official rating on record is 84, from the run on 17 October 2023. The highest on record is 97.
- What is Professor Calculus (GB)'s sire's record?
- Twilight Son (GB)'s progeny in our archive have won 9.6% of 3,643 runs since Jan 2008 (281 horses), Flat and jumps together. Strongest at trips under 6f (all codes): 12.6% from 613.
- Who are Professor Calculus (GB)'s siblings?
- Out of Roslea Lady (IRE), Professor Calculus (GB) has 10 other produce in our archive, 3 of them winners. Most wins: Royal Roslea (GB) (2). Highest grade won: Class 4 (Hoot (IRE)). The wins came over 6f–1m4f. As at Oct 2026.