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Horse profile

One Good Emperor (IRE)

3yo gelding (at last run, Jun 2010) · Last trainer John Best · Last owner S Malcolm M Winwright P Tindall
by Antonius Pius (USA) out of Break of Day (USA) (Favorite Trick)
8 runs · 7 courses · from Jul 2009
As at 5 Nov 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 17 Jun 2010 — 5,985 days ago. Our archive can't say whether the horse is still in training.
Last run Jun 2010 · 7th of 27 Won at Newmarket Last raced off OR 81
KTB Profile

One Good Emperor (IRE) is 1 from 8, the win coming at Class 5 level. Hasn't won since May 2010. Last raced off a career-high mark of 81.

Based on 8 archived runs · updated 5 Nov 2026
KTB at a glance Win at Class 5 OR at career high
Official rating81At career-high mark
81 73–81

KTB Speed and Rating

KTB Speed

No KTB Speed figures for this horse. The engine scores GB and Irish racing from Oct 2016; runs elsewhere, or earlier, have no figure.

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 0 figures from 0 runs · a record, not a forecast

KTB Rating

Best recent KTB Rating 93A the best of the last 3 rated runs · Newmarket, 14 May 2010 Official rating 81 at the last run, 17 Jun 2010

What the horse achieved in each race, in pounds on the official-rating scale, from the weight carried, the lengths beaten and the race's own level solved across the archive — never the market, never the official rating as a starting point. The headline is the best of the horse's last three rated runs on that code — its best recent day. The KTB Rating on a racecard is a different reading of the same figures: the level the horse has been running to, an average of up to its last six runs with the latest counting most, so the two can differ. A, B or C on a run is how much known form was in that race. What this means →

Flat 8 figures · best 93A · median 73.5
GoingRunsBestMedianSince 5 Nov 2025
Good to Firm393A80—
Standard (AW)390A79—
Good267A66—
DistanceRunsBestMedianSince 5 Nov 2025
1m – 1m1f493A74—
6f – 7f490A73—

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 8 figures from 8 runs · as at 4 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

Sire

Progeny in our archive have won 8.1% of 3,236 runs since Apr 2009 (195 horses).

Weakest on good to soft going: 5% from 339.

GoingRunsWinsSRvs sireThis horse
Firm2414.2%−3.9—
Good to Firm640619.5%+1.41 from 3
Good799729%+0.90 from 2
Good to Soft339175%−3.1—
Soft476428.8%+0.7—
Heavy213125.6%−2.5—
Standard (AW)745587.8%−0.30 from 3
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f230156.5%−1.6—
6f – 7f977969.8%+1.70 from 4
1m – 1m1f651497.5%−0.61 from 4
1m2f – 1m4f389266.7%−1.4—
1m5f – 2m574457.8%−0.3—
2m1f – 2m4f306216.9%−1.2—
2m5f – 3m76810.5%+2.4—
Over 3m3339.1%+1—

Flat and jumps together (all codes) · since Apr 2009 · as at 5 Nov 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Break of Day (USA) (Favorite Trick)

6 siblings in the archive, 5 winners — best of them Lush Life (IRE) (4 wins).

The wins came over 6f–1m; the highest grade won is Class 2 (Laddies Poker Two (IRE)).

ProduceRunsWinsWin tripsBest grade
Lush Life (IRE)1547f–1mClass 3
Laddies Poker Two (IRE)536f–7fClass 2
Chooseday (IRE)3336fClass 3
Rock Ace (IRE)626fClass 5
Serenity (IRE)817fClass 5
Luisa Tetrazzini (IRE)280——

Record by conditions

GoingRunsWinsSR£1
Good to Firm 3 1 33% +23.00
Standard (AW) 3 0 0% −3.00
Good 2 0 0% −2.00

ClassRunsWinsSR£1
Class 5 3 1 33% +23.00
Class 2 2 0 0% −2.00
Class 6 2 0 0% −2.00
Class 3 1 0 0% −1.00

CourseRunsWinsSR£1
Newmarket 2 1 50% +24.00
Ascot 1 0 0% −1.00
Windsor 1 0 0% −1.00
Wolverhampton (AW) 1 0 0% −1.00
Kempton (AW) 1 0 0% −1.00
Lingfield (AW) 1 0 0% −1.00
Goodwood 1 0 0% −1.00

DistanceRunsWinsSR£1
1m – 1m1f 4 1 25% +22.00
6f – 7f 4 0 0% −4.00

JockeyRunsWinsSR£1
Kieren Fox 3 1 33% +23.00
Steve Drowne 2 0 0% −2.00
Robert Winston 2 0 0% −2.00
Marc Halford 1 0 0% −1.00

SeasonRunsWinsSR£1
2010 4 1 25% +22.00
2009 4 0 0% −4.00

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

DateCourseRace PosBtn Wgt ORKTB Jockey SP
2010 · 4 runs
17 Jun 10+19d Ascot Britannia Stakes (Heritage Handicap) (Str) Class 2 · 1m · Good To Firm · 27 ran 7/27 ½ 7-8 8180A Kieren Fox 33/1
29 May 10+15d Newmarket Home Of Racing Handicap Class 3 · 1m · Good To Firm · 11 ran 5/11 ¾ 8-5 8168A Kieren Fox 17/2
14 May 10+18d Newmarket 32red.com Handicap Class 5 · 1m · Good To Firm · 10 ran 1/10 8-11 7393A Kieren Fox 25/1
26 Apr 10+192d Windsor Follow Windsor & Eton F.C. At wefc.co.uk Handicap Class 5 · 1m · Good · 14 ran 8/14 1¼ 9-4 7565A Steve Drowne 66/1
2009 · 4 runs
16 Oct 09+16d Wolverhampton (AW) totesportgames.com Median Auction Maiden Stakes Class 6 · 6f · Standard To Fast · 10 ran 8/10 1½ 9-0 7852A Marc Halford 5/2J
30 Sep 09+34d Kempton (AW) 'buy A 10,000 Racing Post Bonus Yearling' Maiden Auction Stakes Class 5 · 7f · Standard · 13 ran 3/13 2½ 9-2 —79A Robert Winston 2/1F
27 Aug 09+30d Lingfield (AW) Lashings World XI Median Auction Maiden Stakes (AW) Class 6 · 6f · Standard · 12 ran 3/12 nk 9-3 —90A Robert Winston 20/1
28 Jul 09 Goodwood E.B.F. Selsey Maiden Stakes (C&G) Class 2 · 6f · Good · 9 ran 5/9 1¼ 9-0 —67A Steve Drowne 25/1

Quick answers

How many races has One Good Emperor won?
One Good Emperor (IRE) won 1 of 8 archived starts between 2009 and 2010, a strike rate of 12.5%. Placed 3 times in total (37.5% of starts).
Who trained One Good Emperor?
One Good Emperor (IRE) was trained by John Best on the most recent run on record, at Ascot on 17 June 2010.
Who is One Good Emperor's sire?
One Good Emperor (IRE) is by Antonius Pius (USA) out of Break of Day (USA), whose sire is Favorite Trick.
What going does One Good Emperor prefer?
One Good Emperor (IRE) has the best record on good to firm going: 1 win from 3 starts (33.3%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
What is One Good Emperor's official rating?
The most recent official rating on record is 81, from the run on 17 June 2010. That is also the highest on record.
What is One Good Emperor's sire's record?
Antonius Pius (USA)'s progeny in our archive have won 8.1% of 3,236 runs since Apr 2009 (195 horses), Flat and jumps together. Weakest on good to soft going: 5% from 339.
Who are One Good Emperor's siblings?
Out of Break of Day (USA), One Good Emperor (IRE) has 6 other produce in our archive, 5 of them winners. Most wins: Lush Life (IRE) (4). Highest grade won: Class 2 (Laddies Poker Two (IRE)). The wins came over 6f–1m. As at Nov 2026.

Record shown from July 2009. Our archive holds racing in Great Britain, Ireland and France from January 2005. Any runs before that, or in other countries, are not in it. In-running comments are available from 2024 onward.