Official NHA Assessment

Race 6: TAB 4RACING APP MR 70 HANDICAP (Open)

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Line Horse
Flinders Range
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
7 / 11
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    Alingalonga          4    60.5    1    0.00     3.0   71    71           71    +0
2    Chariot Master       4    55.0    2    0.25     3.0   60    60           60    +0
3    Flinders Range       3    55.5    3    0.75     5.0   61    61           61    +0
4    Then In Focus        2    59.5    4    2.00     0.0   79    78           78    -1
5    Dammi                2    57.5    5    2.50     0.0   75    73           73    -2
6    Power Surge          3    55.5    6    3.00     5.0   61    59           59    -2
7    Can Col              2    59.5    7    8.50     0.0   79    75           75    -4
8    Reginas Angel        4    52.0    8    9.00     3.0   54    54           54    +0
9    Global Ash           4    55.5    9    9.50     3.0   61    61           61    +0
10   Royal Shindig        4    60.5    10   9.75     3.0   71    71           71    +0
11   Humble Tune          4    60.0    11   15.00    3.0   70    70           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Alingalonga 71 82 71 +11 3.0 -
2 Chariot Master 60 61 60 +1 3.0 -
3 Flinders Range Line 61 71 61 +10 5.0
4 Then In Focus 79 71 78 -7 0.0 -
5 Dammi 75 55 73 -18 0.0 -
6 Power Surge 61 53 59 -6 5.0 -
7 Can Col 79 71 75 -4 0.0 -
8 Reginas Angel 54 49 54 -5 3.0 -
9 Global Ash 61 61 61 ✓ Match 3.0 -
10 Royal Shindig 71 62 71 -9 3.0 -
11 Humble Tune 70 58 70 -12 3.0 -
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