Official NHA Assessment

Race 3: WWW.TAB4RACING.COM MR 80 HANDICAP (Open)

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Line Horse
Quatermain
Reference for assessment
Exact Matches
3 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
4 / 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    Immediate Edge       3    56.5    1    0.00     5.0   83    66           83    +0
2    Diesel's Shadow      4    58.5    2    1.30     2.5   77    80           80    +3
3    Dark Silver          4    59.0    3    1.55     2.5   78    81           81    +3
4    Quatermain           2    56.5    4    1.85     0.0   81    81           81    +0
5    Casus Belli          3    55.5    5    4.45     5.0   80    65           70    -10
6    Thambi               5    52.5    6    4.75     0.0   64    68           68    +4
7    Beynac               2    58.0    7    9.50     0.0   86    79           79    -7
8    High Queue           4    58.0    8    16.25    2.5   76    74           74    -2
9    Flag Bearer          3    53.5    9    16.55    5.0   67    60           60    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Immediate Edge 83 108 83 +25 5.0 -
2 Diesel's Shadow 77 80 80 ✓ Match 2.5 -
3 Dark Silver 78 84 81 +3 2.5 -
4 Quatermain Line 81 79 81 -2 0.0
5 Casus Belli 80 64 70 -6 5.0 -
6 Thambi 64 55 68 -13 0.0 -
7 Beynac 86 90 79 +11 0.0 -
8 High Queue 76 74 74 ✓ Match 2.5 -
9 Flag Bearer 67 60 60 ✓ Match 5.0 -
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