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Horse profile

Diamond Supreme (IRE)

8yo gelding (at last run, Mar 2010) · Last trainer Henrietta C Knight · Last owner Ms Heather Topping
by Supreme Leader (GB) out of Castlemartin (IRE) (Carlingford Castle)
5 runs · 5 courses · from Mar 2007
As at 27 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 1 Mar 2010 — 6,084 days ago. Our archive can't say whether the horse is still in training.
Last run Mar 2010 Last raced off OR 81
KTB Profile

Diamond Supreme (IRE) is yet to win from 5 starts. Last raced off a career-high mark of 81.

Based on 5 archived runs · updated 27 Oct 2026

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 85C the best of the last 3 rated runs · Plumpton, 16 Nov 2009 Official rating 81 at the last run, 1 Mar 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. A, B or C on a run is how much known form was in that race. What this means →

Jumps 4 figures · best 93C · median 85
GoingRunsBestMedianSince 27 Oct 2025
Good to Soft293C89—
Heavy1———
Good1———
DistanceRunsBestMedianSince 27 Oct 2025
1m5f – 2m293C89—
2m1f – 2m4f1———
2m5f – 3m1———

Of 5 runs looked at, 1 has no figure: did not complete (or a non-runner row) (1).

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 4 figures from 5 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
Supreme Leader (GB)

Progeny in our archive have won 9.2% of 2,984 runs since Jan 2008 (349 horses).

GoingRunsWinsSRvs sireThis horse
Firm2627.7%−1.5—
Good to Firm184189.8%+0.6—
Good665578.6%−0.60 from 1
Good to Soft470449.4%+0.20 from 2
Soft885859.6%+0.40 from 1
Heavy744668.9%−0.30 from 1
Standard (AW)10220%+10.8—
Distance (all codes)RunsWinsSRvs sireThis horse
1m2f – 1m4f900%−9.2—
1m5f – 2m575559.6%+0.40 from 2
2m1f – 2m4f1,0661059.8%+0.60 from 2
2m5f – 3m1,019918.9%−0.30 from 1
Over 3m315237.3%−1.9—

Flat and jumps together (all codes) · since Jan 2008 · as at 27 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Castlemartin (IRE) (Carlingford Castle)

1 sibling in the archive, 1 winner — best of them Augher Castle (IRE) (1 win).

The wins came over 2m6f.

ProduceRunsWinsWin tripsBest grade
Augher Castle (IRE)1412m6f—

Record by conditions

GoingRunsWinsSR£1
Good to Soft 2 0 0% −2.00
Soft 1 0 0% −1.00
Heavy 1 0 0% −1.00
Good 1 0 0% −1.00

ClassRunsWinsSR£1
Class 5 2 0 0% −2.00
Class 4 2 0 0% −2.00
Class 3 1 0 0% −1.00

CourseRunsWinsSR£1
Hereford 1 0 0% −1.00
Plumpton 1 0 0% −1.00
Newton Abbot 1 0 0% −1.00
Towcester 1 0 0% −1.00
Newbury 1 0 0% −1.00

DistanceRunsWinsSR£1
2m1f – 2m4f 2 0 0% −2.00
1m5f – 2m 2 0 0% −2.00
2m5f – 3m 1 0 0% −1.00

JockeyRunsWinsSR£1
Warren Marston 3 0 0% −3.00
Sam Jones 1 0 0% −1.00
Dominic Elsworth 1 0 0% −1.00

SeasonRunsWinsSR£1
2010 1 0 0% −1.00
2009 2 0 0% −2.00
2008 1 0 0% −1.00
2007 1 0 0% −1.00

TypeRunsWinsSR£1
Hurdle 3 0 0% −3.00
Chase 1 0 0% −1.00
NH Flat 1 0 0% −1.00

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 · 1 run
01 Mar 10+105d Hereford Weatherbys Single Race Bloodstock Insurance Handicap Chase Class 5 · 19f · Soft · 17 ran PU/17 — 11-0 81— Sam Jones 40/1
2009 · 2 runs
16 Nov 09+182d Plumpton Artemis Fund Managers Hindu Kush 'national Hunt' Novices' Hurdle Class 4 · 20.5f · Heavy · 9 ran 7/9 30 10-12 8185C Warren Marston 66/1
18 May 09+143d Newton Abbot Another Birthday For Sean Dooner Novices' Hurdle Class 4 · 21.5f · Good · 12 ran 7/12 22 10-12 —84C Dominic Elsworth 33/1
2008 · 1 run
26 Dec 08+643d Towcester E.B.F. 'National Hunt' Novices' Hurdle (Qualifier) Class 3 · 16f · Good To Soft · 15 ran 9/15 18 10-12 —85C Warren Marston 50/1
2007 · 1 run
24 Mar 07 Newbury West Berkshire Racing Club Standard Open NH Flat Race Class 5 · 16.5f · Good To Soft · 22 ran 18/22 hd 11-4 —93C Warren Marston 33/1

Quick answers

How many races has Diamond Supreme won?
Diamond Supreme (IRE) has yet to win, from 5 archived starts between 2007 and 2010.
Who trained Diamond Supreme?
Diamond Supreme (IRE) was trained by Henrietta C Knight on the most recent run on record, at Hereford on 1 March 2010.
Who is Diamond Supreme's sire?
Diamond Supreme (IRE) is by Supreme Leader (GB) out of Castlemartin (IRE), whose sire is Carlingford Castle.
What is Diamond Supreme's official rating?
The most recent official rating on record is 81, from the run on 1 March 2010. That is also the highest on record.
What is Diamond Supreme's sire's record?
Supreme Leader (GB)'s progeny in our archive have won 9.2% of 2,984 runs since Jan 2008 (349 horses), Flat and jumps together.
Who are Diamond Supreme's siblings?
Out of Castlemartin (IRE), Diamond Supreme (IRE) has 1 other produce in our archive, 1 of them a winner. Most wins: Augher Castle (IRE) (1). The wins came over 2m6f. As at Oct 2026.

Record shown from March 2007. Our archive holds racing in Great Britain, Ireland and France from January 2005. Runs in other countries are not in it, and earlier runs are not available from our data provider. In-running comments are available from 2024 onward.