Official NHA Assessment

Race 6: RACING240 MR 74 HANDICAP (Open)

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Line Horse
Mount Darwin
Reference for assessment
Exact Matches
2 / 12
Calculated = Official
Close Matches
6 / 12
Within 2 points
Significant Diffs
3 / 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    Instant Attraction   3    53.0    1    0.00     2.5   60    56           60    +0
2    Mount Darwin         3    61.5    2    2.30     2.5   77    77           77    +0
3    Casus Belli          3    55.0    3    4.30     2.5   64    61           61    -3
4    Repetition           3    60.0    4    4.70     2.5   74    71           71    -3
5    Dj Junior            3    61.5    5    5.00     2.5   77    73           73    -4
6    Thoonsil             3    59.0    6    8.70     2.5   77    68           68    -9
7    Full Go              6    52.5    7    10.10    0.0   59    60           60    +1
8    Arumugam             6    60.0    8    11.30    0.0   74    75           75    +1
9    Sand Script          3    59.5    9    11.80    2.5   78    69           69    -9
10   Majalun              3    52.0    10   14.05    2.5   56    54           54    -2
11   Romeo's Magic        7    59.0    11   16.55    0.0   72    73           73    +1
12   Terrence             3    59.5    12   28.30    2.5   78    69           69    -9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Instant Attraction 60 60 60 ✓ Match 2.5 -
2 Mount Darwin Line 77 77 77 ✓ Match 2.5
3 Casus Belli 64 64 61 +3 2.5 -
4 Repetition 74 74 71 +3 2.5 -
5 Dj Junior 77 77 73 +4 2.5 -
6 Thoonsil 77 77 68 +9 2.5 -
7 Full Go 59 59 60 -1 0.0 -
8 Arumugam 74 74 75 -1 0.0 -
9 Sand Script 78 78 69 +9 2.5 -
10 Majalun 56 56 54 +2 2.5 -
11 Romeo's Magic 72 72 73 -1 0.0 -
12 Terrence 78 78 69 +9 2.5 -
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