Official NHA Assessment

Race 2: TAB TELEBET 011 074 0300 MAIDEN PLATE (For all Maidens)

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Line Horse
Rock My Boat
Reference for assessment
Exact Matches
2 / 6
Calculated = Official
Close Matches
2 / 6
Within 2 points
Significant Diffs
3 / 6
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    Proper               3    60.0    1    0.00     2.0   -     62           6     +6
2    Rock My Boat         3    60.0    2    2.25     2.0   65    65           65    +0
3    Sutter's Mill        2    56.0    3    7.00     0.0   -     58           58    +58
4    River Kitten         3    60.0    4    99.99    2.0   55    62           62    +7
99   Emerald Countess     2    57.0    99   0.00     0.0   -     60           60    +0
99   Captain's Express    3    57.5    99   0.00     2.0   -     57           57    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Proper - 73 6 +67 2.0 -
2 Rock My Boat Line 65 65 65 ✓ Match 2.0
3 Sutter's Mill - - 58 - 0.0 -
4 River Kitten 55 55 62 -7 2.0 -
99 Emerald Countess - 72 60 +12 0.0 -
99 Captain's Express - 57 57 ✓ Match 2.0 -
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