Official NHA Assessment

Race 3: BOOK FOR CHARITY MILE MAIDEN PLATE (For all Maidens)

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Line Horse
Big Dreamer
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
10 / 12
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Samthewiseman        5    58.0    1    0.00     0.0   67    -            67    +0
2    Billy Spellbound     2    58.0    2    1.75     0.0   -     3            3     +3
3    Celtic Rush          5    58.0    3    4.00     0.0   -     1            1     +1
4    Us Open              3    58.0    4    4.25     8.0   -     -15          -     +0
5    Big Dreamer          2    58.0    5    5.50     0.0   -     -            -     +0
6    Kilbrannan Sound     2    58.0    6    5.55     0.0   60    -            55    -5
7    Big Five             3    60.0    7    6.75     8.0   59    -12          49    -10
8    Arctic Time          3    58.0    8    9.00     8.0   -     -16          -     +0
9    Namaqua Red          2    54.0    9    9.25     0.0   65    -8           55    -10
10   Kimbolton Castle     3    58.0    10   13.50    8.0   -     -16          -     +0
11   Thermopylae          2    58.0    11   13.75    0.0   78    -            68    -10
12   Dungeons             2    58.0    12   15.00    0.0   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Samthewiseman 67 52 67 -15 0.0 -
2 Billy Spellbound - 73 3 +70 0.0 -
3 Celtic Rush - 69 1 +68 0.0 -
4 Us Open - 60 - +60 8.0 -
5 Big Dreamer Line - 52 - +52 0.0
6 Kilbrannan Sound 60 67 55 +12 0.0 -
7 Big Five 59 53 49 +4 8.0 -
8 Arctic Time - 49 - +49 8.0 -
9 Namaqua Red 65 59 55 +4 0.0 -
10 Kimbolton Castle - 48 - +48 8.0 -
11 Thermopylae 78 54 68 -14 0.0 -
12 Dungeons - 73 - +73 0.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. 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