Official NHA Assessment

Race 3: PLAY SOCCER 6, 10 AND 13 MAIDEN PLATE (For all Maidens)

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Line Horse
Joe Harman
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 8
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    Music Box Special    3    60.0    1    0.00     10.0  53    42           42    -11
2    Mansooriya           3    56.5    2    0.25     10.0  56    35           46    -10
3    Joe Harman           4    60.0    3    3.00     7.0   51    51           51    +0
4    Jack In The Box      5    60.0    4    3.10     0.0   58    65           65    +7
5    Colour Coded         3    56.5    5    4.35     10.0  50    36           40    -10
6    Stepdance            2    55.5    6    6.10     0.0   55    53           53    -2
7    Fort Dawn            4    60.0    7    27.10    7.0   52    48           48    -4
99   Antonia Augusta      2    51.5    99   0.00     0.0   -     45           45    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Music Box Special 53 53 42 +11 10.0 -
2 Mansooriya 56 52 46 +6 10.0 -
3 Joe Harman Line 51 54 51 +3 7.0
4 Jack In The Box 58 53 65 -12 0.0 -
5 Colour Coded 50 54 40 +14 10.0 -
6 Stepdance 55 57 53 +4 0.0 -
7 Fort Dawn 52 49 48 +1 7.0 -
99 Antonia Augusta - 57 45 +12 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