Official NHA Assessment

Race 5: TRACK AND BALL CHATSWORTH FM 67 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse

Duchess Of Sussex

Reference for assessment

Exact Matches

2 / 18

Calculated = Official

Close Matches

5 / 18

Within 2 points

Significant Diffs

6 / 18

More than 5 points

Detailed Assessment

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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Laurel Lane          4    54.5    1    0.00     0.5   56    53           56    +0
2    Alittlebitnaughty    4    60.0    2    1.30     0.5   67    67           67    +0
3    Duchess Of Sussex    4    57.5    3    2.00     0.5   62    62           62    +0
4    Symmetry             3    55.0    4    2.30     1.5   60    54           54    -6
5    Family Favourite     3    58.0    5    2.55     1.5   66    60           60    -6
6    Grue Of Ice          6    59.0    6    3.45     0.0   68    64           64    -4
7    Flower Season        5    56.5    7    4.85     0.0   60    58           58    -2
8    Raspberry Beret      3    56.5    8    5.10     1.5   63    55           55    -8
9    Hot Strike           7    59.0    9    5.35     0.0   65    63           63    -2
10   Fateful Mistress     5    55.5    10   6.40     0.0   58    56           56    -2
11   Angelofthemorning    3    59.0    11   6.45     1.5   68    60           60    -8
12   Razzle Dazzle Em     4    57.5    12   6.50     0.5   62    59           59    -3
13   Kildonan Bay         5    54.0    13   6.75     0.0   55    53           53    -2
14   Hot Money            5    57.5    14   8.05     0.0   65    60           60    -5
15   Owlette              4    56.0    15   8.55     0.5   59    56           56    -3
99   Capriccio            5    53.5    99   0.00     0.0   -     52           52    +0
99   Noble Storm          3    60.0    99   0.00     1.5   -     62           62    +0
99   Hatta                4    53.5    99   0.00     0.5   -     51           51    +0
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Horse-by-Horse Comparison

Pos	Horse	Pre-Rating	Official New	Calculated	Discrepancy	WFA (kg)	Line Horse
1	Laurel Lane	56	60	56	+4	0.5	-
2	Alittlebitnaughty	67	62	67	-5	0.5	-
3	Duchess Of Sussex Line	62	62	62	✓ Match	0.5
4	Symmetry	60	57	54	+3	1.5	-
5	Family Favourite	66	69	60	+9	1.5	-
6	Grue Of Ice	68	53	64	-11	0.0	-
7	Flower Season	60	54	58	-4	0.0	-
8	Raspberry Beret	63	61	55	+6	1.5	-
9	Hot Strike	65	59	63	-4	0.0	-
10	Fateful Mistress	58	51	56	-5	0.0	-
11	Angelofthemorning	68	48	60	-12	1.5	-
12	Razzle Dazzle Em	62	57	59	-2	0.5	-
13	Kildonan Bay	55	54	53	+1	0.0	-
14	Hot Money	65	62	60	+2	0.0	-
15	Owlette	59	56	56	✓ Match	0.5	-
99	Capriccio	-	55	52	+3	0.0	-
99	Noble Storm	-	78	62	+16	1.5	-
99	Hatta	-	59	51	+8	0.5	-

Assessment Methodology

Calculation Steps:

Identify Line Horse - consistent performer used as reference
Calculate WFA Allowance based on age, distance, and month
Apply Drag Adjustment for beaten margin
Calculate Actual Weight Performance:
Weight - Drag - WFA
Compare to Line Horse to determine race rating
Apply special rules (maiden caps, layoff allowance)

Key Formulas:

Drag Effect: Varies by distance (see Benchmarks page)
1 length ≈ 1kg at 1 mile (1600m)
WFA Scale: Based on Admiral Rous's 1855 table
Rating Points: 1kg = 2 rating points