Official NHA Assessment

Race 7: OPEN A TABGOLD ACCOUNT - 031 314 1874 CLASS 4 (Open. Benchmark at 60.0kg = 80)

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Line Horse
Go Grayson Go
Reference for assessment
Exact Matches
0 / 18
Calculated = Official
Close Matches
3 / 18
Within 2 points
Significant Diffs
15 / 18
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    Famous Warrior       3    57.5    1    0.00     5.0   88    80           80    -8
2    Rodriguez            6    60.0    2    0.30     0.0   80    100          100   +20
3    Go Grayson Go        3    59.5    3    0.60     5.0   89    89           89    +0
4    Ralph The Rascal     8    58.0    4    0.70     0.0   76    96           96    +20
5    Down By The River    2    57.5    5    1.10     0.0   80    94           94    +14
6    Nocturnal Flight     3    59.0    6    1.70     5.0   78    86           86    +8
7    Jazz Festival        5    57.0    7    1.80     0.0   74    92           92    +18
8    Jp's Palace          3    59.0    8    2.40     5.0   88    85           85    -3
9    Master Of Destiny    8    59.0    9    2.45     0.0   78    95           95    +17
10   Send Me              3    58.0    10   2.50     5.0   76    83           83    +7
11   Mvelelo              2    59.5    11   3.60     0.0   79    95           95    +16
12   Papa C               6    57.5    12   3.65     0.0   75    91           91    +16
13   Palermo              4    58.5    13   5.15     2.5   77    87           87    +10
14   Arverni King         5    60.0    14   5.65     0.0   80    95           95    +15
15   Night Rocker         2    58.5    15   8.45     0.0   87    92           92    +5
99   Record High          3    53.5    99   0.00     5.0   -     72           72    +0
99   Nightjar             3    55.0    99   0.00     5.0   -     75           75    +0
99   Star Of The Future   3    56.0    99   0.00     5.0   -     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 Famous Warrior 88 90 80 +10 5.0 -
2 Rodriguez 80 69 100 -31 0.0 -
3 Go Grayson Go Line 89 95 89 +6 5.0
4 Ralph The Rascal 76 73 96 -23 0.0 -
5 Down By The River 80 95 94 +1 0.0 -
6 Nocturnal Flight 78 72 86 -14 5.0 -
7 Jazz Festival 74 70 92 -22 0.0 -
8 Jp's Palace 88 93 85 +8 5.0 -
9 Master Of Destiny 78 73 95 -22 0.0 -
10 Send Me 76 64 83 -19 5.0 -
11 Mvelelo 79 84 95 -11 0.0 -
12 Papa C 75 73 91 -18 0.0 -
13 Palermo 77 76 87 -11 2.5 -
14 Arverni King 80 86 95 -9 0.0 -
15 Night Rocker 87 77 92 -15 0.0 -
99 Record High - 71 72 -1 5.0 -
99 Nightjar - 67 75 -8 5.0 -
99 Star Of The Future - 78 77 +1 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