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Trainer profile

Mlle Valerie Boussin

196 runners in the lifetime window · 35 individual horses
As at 6 Nov 2026 · KTB archive: 2005–present, updated daily
Last runner Sep 2013 100% of runners on the flat
Last 5 seasons Lifetime (2008→)
No runners in the last 5 seasons — showing the lifetime record, from 1 Jan 2008 — the aggregate floor: every horse in the window has a complete captured career behind it.
8–196
Wins / Runs
4.1%
Strike rate
n=196
27 (14%)
Placed
0.56
Fair A/E
n=182 · 0.48 incl. margin
−131.60
£1 level stake
n=182 at SP · −72.3%
£273k
Prize money (window)
Strike by season
0%
KTB Yard Profile

Sent out around 30 runners a season, almost all on the flat, winning with 4% of them — a touch below the margin-free market read across the lifetime window (Fair A/E 0.56).

Deterministic profile computed from 196 archived runs (lifetime window) · updated 6 Nov 2026
KTB at a glance Fresh horses: 4.3% Sebastien Maillot: 5.4% from 92
The read

Runners with a claiming rider up have been a poor signal at 0% (n=30, Fair A/E 0.00). Sebastien Maillot rode 47% of the entries and matches the yard's average almost exactly (5.4%, A/E 0.58). The market has consistently overbet the yard over 1m2f – 1m4f: Fair A/E 0.37 across 59 runners (1.7% strike, −49.60 to a £1 stake) — runners there underperformed what the price implied.

Written from the figures on this page — every claim carries its sample. Descriptive, not a tip.

Yard patterns

the angles behind the record · vs 4.1% baseline
Fresh · 61+ days off
4.3%+0.2
n=47 · A/E 0.69 · £1 −32.60
New recruits · first run for the yard
5.9%+1.8
n=17 · A/E 0.00 · £1 −15.00
Debutants · first career start
0%−4.1
n=18 · A/E 0.00 · £1 −17.00
First-time headgear · true-first definition
0%−4.1
n=8 · A/E 0.00 · £1 −8.00
Headgear returns · back on after a bare run
0%−4.1
n=2 · A/E 0.00 · £1 −2.00
When favourite
0%
n=1 · A/E 0.00 · £1 −1.00
Claiming riders · a claimer in the saddle
0%−4.1
n=30 · A/E 0.00 · £1 −30.00
Group / Graded races · pattern & listed
0%−4.1
n=14 · A/E 0.00 · £1 −14.00

Each tile is the record in that situation vs the 4.1% baseline — descriptive splits with the sample always shown, for you to weigh. Tiles under 30 runs render muted. Headgear figures use the true-first definition (first gear appearance in the captured career); returns are gear back on after a bare run. Claiming riders are runs where the booked rider carried a weight claim. Group / Graded covers pattern and listed races. The same beliefs, tested across every yard and every GB and Irish race since 2005: Racing myths.

Notable angles

vs their own baseline
With claiming riders up 0% vs 4.1% · n=30
Over 1m2f – 1m4f 1.7% vs 4.1% · n=59
On Good going 6.3% vs 4.1% · n=64
Over 6f – 7f 6.1% vs 4.1% · n=49
On Soft going 2.1% vs 4.1% · n=48
With a new jockey booking 2.6% vs 4.1% · n=76 · A/E 0.51
Descriptive splits ranked by divergence × sample — insight, not instruction. Every angle carries its N; nothing under 30 runs qualifies. Rows within 2pts of the baseline appear only when the market-relative read (Fair A/E) diverges, and show it.

Record by conditions

same window as header

Going

GoingRWSR£1
Good 64 4 6.3% −49.80
Soft 48 1 2.1% −37.60
Standard (AW) 34 1 2.9% −12.70
Good to Soft 29 2 6.9% −12.50
Heavy 21 0 0% −19.00

Courses

CourseRWSR£1
Maisons-Laffitte (FR) 53 3 5.7% −30.10
Deauville (FR) 42 2 4.8% −19.70
Saint-Cloud (FR) 40 1 2.5% −36.00
Chantilly (FR) 27 0 0% −27.00
Longchamp (FR) 24 2 8.3% −13.80
Fontainebleau 2 0 0% −1.00
Compiegne 2 0 0% −1.00
Dieppe 1 0 0% —
Bordeaux Le Bouscat (FR) 1 0 0% −1.00
Le-Grand-Fougeray 1 0 0% —
Le Croise-Laroche (FR) 1 0 0% −1.00
Toulouse (FR) 1 0 0% −1.00
Clairefontaine 1 0 0% —

Class

ClassRWSR£1
Class 1 14 0 0% −14.00

Market position

In the bettingRWSRA/E£1
Favourite 1 0 0% 0.00 −1.00
2nd–3rd fav 9 2 22.2% 1.76 +9.60
4th–6th fav 32 1 3.1% 0.45 −20.50
7th+ in betting 140 1 0.7% 0.28 −119.70
Fair A/E per band is the tell: near 1.00 the market had it priced right; well above, the wins came where the market didn't expect them.

Rows below n=30 are shown faded — a small sample is a fact, not a trend. Every figure carries its N.

Horses trained

same window as header · most-raced first
HorseRWPlLast ran
Garde Slickly (FR)then Robert Collet 31 3 6 5 Sep 13
Nuit De Glace (FR)from Robert Collet 28 3 6 8 Oct 11
Blue San (FR)then Mlle J Legatte 17 0 4 9 Oct 12
Un Jour (FR)then F Belmont 12 1 4 15 Nov 12
Big Blind (FR)from G Collet · then E Wianny 11 0 1 10 Sep 13
Secret Of Gruchy (FR)then Mme V Deiss 10 0 1 12 Sep 11
Australian Dream (FR) 8 0 1 5 Nov 12
El Miesquo (FR)from Robert Collet 6 0 0 23 May 11
Diagora (FR) 5 0 2 15 Mar 11
Unborn Spring (IRE)from Robert Collet 5 0 0 11 Jan 11
Calvero (FR)from Robert Collet · then Mme C Barande-Barbe 5 0 0 8 Nov 10
For Love (FR) 4 0 0 3 Nov 11
All 35 horses sent out in this window. Runs, wins and places only: a strike rate or a return on a handful of runs is noise, so none is quoted per horse — each horse's full record is on its own page.
Where they came from · where they went next

Of the 35 horses listed, 17 arrived from another yard in our archive, most often from Robert Collet (12) and M Cesandri (2); 18 had their first archived run for this yard.

12 have since run for another yard, most often for Mme C Barande-Barbe (2) and Remy Nerbonne (2); 23 have no later run for another yard in our archive.

Read from each listed horse's whole archived career (2005 onwards), not only this window, and counted over the horses listed above, not the whole string. “First archived run” means our archive holds nothing earlier, not that the horse was unraced. A horse with no later run elsewhere may still be here, be off the track, or have run somewhere our archive does not cover — none of that is asserted.

When the yard fires

strike by month, lifetime
JFMAMJJASOND
0·0630125100010
A flat yard: the season runs Mar–Oct. Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Jockey bookings

same window · biggest samples first
Go-to riderSebastien Maillot
47% of all rides
5.4% SR · A/E 0.58
RiderRWSR£1
Sebastien Maillot 92 5 5.4% −56.30
Muted rows are under 30 rides and sit behind "Show all".

Career highlights

lifetime archive, 2008→
8
Archived wins
£273k
Prize money
2011
Best season · 3 wins
Nuit De Glace (FR) — Prix de Cagny (Handicap) Deauville (FR) · Aug 2009
£26,466
Un Jour (FR) — Prix Albine (Handicap) (3yo Fillies) (Turf) Maisons-Laffitte (FR) · Sep 2011
£23,500
Garde Slickly (FR) — Prix Des Caves Du Nord (Handicap) (3yo) (Turf) Maisons-Laffitte (FR) · Jul 2011
£23,500
Notable horses
Garde Slickly (FR) Nuit De Glace (FR) Un Jour (FR) Jenne Jelois (FR)

Sires in the string

progeny record · win % by ground and trip
Slickly (FR) 9.7% · 3–31
Progeny have won 8% of 3,073 runs since 2008 (318 horses). Strongest on Heavy going: 11% from 310. Weakest over 1m5f – 2m (all codes): 4.9% from 243.
Verglas (IRE) 10.7% · 3–28
Progeny have won 10.2% of 6,977 runs since 2008 (499 horses).
Anabaa Blue (GB) 0% · 0–17
Progeny have won 9.3% of 1,937 runs since 2008 (227 horses). Strongest on Good to Soft going: 12.6% from 278. Weakest on Standard (AW) going: 6% from 417.
Miesque's Son (USA) 0% · 0–16
Progeny have won 7.4% of 647 runs since 2008 (72 horses). Weakest on Soft going: 3.8% from 130.
Kahyasi (IRE) 8.3% · 1–12
Progeny have won 10.7% of 2,120 runs since 2008 (185 horses).
Panis (USA) 0% · 0–11
Progeny have won 8.4% of 1,980 runs since 2008 (211 horses). Strongest on Heavy going: 12.2% from 147. Weakest over 2m1f – 2m4f (all codes): 4.3% from 116.
Top line: the yard's own record with each sire's runners (win %, wins–runs), same window as the header; faded under 30 runs. Beneath it: every run by that sire's progeny in our archive since 2008, as at 6 Nov 2026 — what they have done, not a forecast. A going or a distance is named only where at least 100 progeny runs sit 3 or more points from the sire's own win rate. Distance bands cover Flat and jumps together.

The record

latest 50 of 196 · newest first

The latest 50 of 196 archived runners, newest first. The full record runs from 26 September 2008 to 10 September 2013.

DateCourseHorseRaceFinishSP
10 Sep 13 Chantilly (FR) Big Blind (FR)J: Anthony Crastus Prix des Chataigniers (Handicap) (4yo+) (Turf)6f · Soft · 13 ran 12th 26/1
05 Sep 13 Longchamp (FR) Garde Slickly (FR)J: Tony Piccone Prix Mackensie Grieves (Handicap) (3yo+) (Turf)7f · Good · 16 ran 12th 19/1
04 Sep 13 Chantilly (FR) Bleue Jour (FR)J: Pamela Boehm Prix De La Segneurie (Maiden) (3yo) (Polytrack)7f · Standard · 10 ran 10th 51/1
20 Aug 13 Deauville (FR) Big Blind (FR)J: Anthony Crastus Prix Du Mesnil-Germain - Etalon Mawaatheeq (Handicap) (4yo) (Fibresand)6.5f · Standard · 14 ran 13th 11/1
15 Aug 13 Deauville (FR) Bleue Jour (FR)J: Thomas Messina Prix De Tortisambert (Claimer) (3yo) (Fibresand)9.5f · Standard · 16 ran 16th 94/1
10 Aug 13 Deauville (FR) Garde Slickly (FR)J: Olivier Peslier Prix de Bayeux (Handicap) (3yo+) (Turf)8f · Good · 17 ran 10th 12/1
06 Aug 13 Deauville (FR) Big Blind (FR)J: Anthony Crastus Prix Du Canal De Tancarville (Handicap) (4yo+) (Fibresand)6.5f · Standard · 15 ran 4th 29/1
25 Jul 13 Chantilly (FR) Bleue Jour (FR)J: Stevan Bourgois Prix Du Crochet Du Coye (Claimer) (3yo) (Jockeys & Young Jockeys without 10 winners in 2013) (Turf)9f · Good · 13 ran — 57/1
10 Jul 13 Maisons-Laffitte (FR) Garde Slickly (FR)J: Stevan Bourgois Prix A Tempo (Conditions) (4yo+) (Jockeys and Young Jockeys without 10 winners in 2013) (Turf)8f · Good · 16 ran 9th 17/1
29 Jun 13 Deauville (FR) Big Blind (FR)J: Anthony Crastus Prix du Petit Parc (Handicap) (4yo+) (Turf)5f · Good To Soft · 19 ran — 14/1
01 Jun 13 Longchamp (FR) Garde Slickly (FR)J: Sebastien Maillot Prix Andre Carrus (Handicap) (4yo+) (Turf)8.5f · Soft · 18 ran — 44/1
30 May 13 Chantilly (FR) Big Blind (FR)J: Anthony Crastus Prix De Versigny (Handicap) (4yo+) (Turf)5f · Very Soft · 20 ran 6th 15/1
21 May 13 Longchamp (FR) Big Blind (FR)J: Anthony Crastus Prix Des Morillons (Handicap) (4yo+) (Turf)5f · Very Soft · 16 ran 4th 11/1
12 May 13 Longchamp (FR) Garde Slickly (FR)J: Eddy Hardouin Grand Handicap des Milers (Handicap) (4yo+) (Turf)8f · Good · 18 ran 9th 66/1
06 May 13 Maisons-Laffitte (FR) Big Blind (FR)J: Ioritz Mendizabal Prix De Malton (Handicap) (4yo+) (Turf)6f · Good · 20 ran — 17/1
15 Apr 13 Maisons-Laffitte (FR) Big Blind (FR)J: Sebastien Maillot Prix De Franche Comte (Handicap) (4yo+) (Turf)6f · Very Soft · 18 ran 10th 18/1
15 Mar 13 Chantilly (FR) Big Blind (FR)J: Sebastien Maillot Prix De La Londe (Handicap) (4yo) (Polytrack)7.5f · Standard · 17 ran — 36/1
12 Jan 13 Deauville (FR) Big Blind (FR)J: Sebastien Maillot Prix de la Perotiere (Conditions) (4yo) (Fibresand)6.5f · Standard · 8 ran 5th 65/1
28 Dec 12 Deauville (FR) Big Blind (FR)J: Sebastien Maillot Prix Des Vagues (Handicap) (3yo) (Fibresand)6.5f · Standard · 13 ran 8th 33/1
19 Dec 12 Deauville (FR) Garde Slickly (FR)J: Sebastien Maillot Prix de Medavy (Handicap) (4yo+) (Fibresand)7.5f · Standard · 16 ran 1st 193/10

Drawn from the whole archive (2005 onwards), so it can include runs outside the window the header statistics cover. Non-runners are not listed. A finish shown in letters is a non-completion (F fell · UR unseated · PU pulled up · BD brought down).

Quick answers

What is Mlle Valerie Boussin's strike rate?
Mlle Valerie Boussin has won 8 of 196 runners since 2008, a strike rate of 4.1% (as at 6 November 2026). Figures are computed from our own results archive.
Which course does Mlle Valerie Boussin do best at?
Maisons-Laffitte (FR) by strike rate: 3 wins from 53 runners (5.7%) since 2008. Read from the 15 courses with the most runners on the same basis, and only those with at least 30 — a small sample cannot top the list, and a rarely-visited course is not in the comparison.
Who rides most for Mlle Valerie Boussin?
Sebastien Maillot, with 92 runners since 2008 — 47% of the total. That pairing has won 5 (5.4%).
What is Mlle Valerie Boussin's Fair A/E?
0.56, from 182 runners with a computed fair probability since 2008. Fair A/E compares actual wins with a margin-stripped market expectation, so 1.00 is par: above it the wins came at bigger prices than the margin-free market implied, below it they did not.
Fair A/E compares wins with a margin-stripped market expectation. Favourite-heavy samples — top yards, leading riders — naturally read a few points warm, so 1.05 means "beat the margin-free market read", not "the market underrates this by 5%". Three sample sizes are reported and never blended: runs (n), the ROI basis (n at SP), and the fair-A/E basis (n with a computed fair probability).

Strike rate is wins over all runs (n). ROI is £1 level stakes at SP over runs with a parseable price (n at SP). Fair A/E is wins over margin-stripped market expectation, over runs with a computed fair probability (n fair). The three Ns can legitimately differ and are always shown. Figures as at 6 November 2026, computed from our own results archive (2005 onwards; aggregates from 2008).