Official NHA Assessment

Race 5: TAB 4RACING APP MR 74 HANDICAP (Open)

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Line Horse
Gamer
Reference for assessment
Exact Matches
2 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
5 / 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    American Rebel       4    60.5    1    0.00     2.0   75    72           75    +0
2    Gamer                4    55.5    2    3.00     2.0   65    65           65    +0
3    Safe Space           5    61.5    3    4.30     0.0   77    79           79    +2
4    Circle Of Grace      4    59.0    4    4.35     2.0   72    70           70    -2
5    George Handel        4    58.0    5    7.15     2.0   78    67           68    -10
6    Japanese Maple       4    53.0    6    7.95     2.0   60    57           57    -3
7    The Merciful         5    52.0    7    8.00     0.0   63    59           59    -4
8    Full Go              6    52.0    8    9.40     0.0   55    59           59    +4
9    Page Boy             3    58.5    9    22.50    4.5   80    63           70    -10
99   Celtic Rush          5    60.0    99   0.00     0.0   -     75           75    +0
99   Panning Gold         3    58.5    99   0.00     4.5   -     63           63    +0
99   Crepuscolo           4    55.5    99   0.00     2.0   -     62           62    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 American Rebel 75 81 75 +6 2.0 -
2 Gamer Line 65 65 65 ✓ Match 2.0
3 Safe Space 77 83 79 +4 0.0 -
4 Circle Of Grace 72 51 70 -19 2.0 -
5 George Handel 78 85 68 +17 2.0 -
6 Japanese Maple 60 56 57 -1 2.0 -
7 The Merciful 63 54 59 -5 0.0 -
8 Full Go 55 59 59 ✓ Match 0.0 -
9 Page Boy 80 79 70 +9 4.5 -
99 Celtic Rush - 69 75 -6 0.0 -
99 Panning Gold - 68 63 +5 4.5 -
99 Crepuscolo - 58 62 -4 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