Official NHA Assessment

Race 4: SUMMER COUNTRY CHAMPIONSHIP 1800 FINAL (For horses with nett rating of 82 and below. NBT)

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Line Horse
Gentleman Joe
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
3 / 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    La Pulga             3    59.5    1    0.00     5.0   88    75           75    -13
2    Gentleman Joe        3    61.5    2    1.75     5.0   82    82           82    +0
3    Groovejet            4    61.5    3    1.80     2.5   82    87           87    +5
4    Kwite A King         4    59.5    4    2.20     2.5   77    83           83    +6
5    Aladdin's Lamp       4    57.5    5    5.45     2.5   76    76           76    +0
6    Tothemoonandback     5    55.0    6    10.70    0.0   69    76           76    +7
7    Happy Days           2    58.5    7    11.95    0.0   83    83           83    +0
8    Green Isle           2    57.0    8    19.95    0.0   77    80           80    +3
9    Marshall Field       3    60.5    9    27.95    5.0   77    77           77    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 La Pulga 88 95 75 +20 5.0 -
2 Gentleman Joe Line 82 83 82 +1 5.0
3 Groovejet 82 82 87 -5 2.5 -
4 Kwite A King 77 79 83 -4 2.5 -
5 Aladdin's Lamp 76 106 76 +30 2.5 -
6 Tothemoonandback 69 69 76 -7 0.0 -
7 Happy Days 83 81 83 -2 0.0 -
8 Green Isle 77 77 80 -3 0.0 -
9 Marshall Field 77 77 77 ✓ 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