Official NHA Assessment

Race 1: TABGOLD SCORE 10 SCORE 8 CONDITIONAL MAIDEN (F & M) (For Mdn F&M with 3 runs or more, Nett Rating of 68 & below)

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Line Horse
Chakpori
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
9 / 9
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    Glamorz              3    60.0    1    0.00     8.5   78    77           77    -1
2    Miss Mayfly          3    54.5    2    0.20     8.5   61    66           66    +5
3    Chakpori             3    59.0    3    0.90     8.5   75    75           75    +0
4    Head Girl            5    59.0    4    4.10     0.0   64    92           92    +28
5    Sunka Wakan          2    52.0    5    4.20     5.5   66    67           67    +1
6    Queen Of Ice         3    56.0    6    5.30     8.5   66    69           69    +3
7    Admirals Queen       2    54.0    7    8.50     5.5   47    71           71    +24
8    Lightinthedarkness   3    57.0    8    9.80     8.5   68    71           71    +3
9    Take Note            2    54.5    9    10.10    5.5   65    72           72    +7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Glamorz 78 62 77 -15 8.5 -
2 Miss Mayfly 61 53 66 -13 8.5 -
3 Chakpori Line 75 64 75 -11 8.5
4 Head Girl 64 62 92 -30 0.0 -
5 Sunka Wakan 66 58 67 -9 5.5 -
6 Queen Of Ice 66 60 69 -9 8.5 -
7 Admirals Queen 47 47 71 -24 5.5 -
8 Lightinthedarkness 68 59 71 -12 8.5 -
9 Take Note 65 58 72 -14 5.5 -
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