Official NHA Assessment

Race 7: play.tabonline.co.za CLASS 4 (Open. Benchmark at 60.0kg = 78)

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Line Horse
Dance Variety
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 10
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    Night Tiger          5    57.0    1    0.00     0.0   75    80           80    +5
2    Dance Variety        2    60.5    2    0.40     2.0   83    83           83    +0
3    Benjamin             4    60.0    3    0.60     3.5   78    79           79    +1
4    Axl                  3    56.0    4    2.10     3.0   70    72           72    +2
5    Kimball O'Hara       2    56.0    5    2.30     2.0   74    74           74    +0
6    Swift Action         3    56.5    6    3.55     3.0   71    73           73    +2
7    Gimme's Laddie       2    60.5    7    4.80     2.0   83    83           83    +0
8    Fort Red             4    59.5    8    5.10     3.5   77    78           78    +1
9    Winter Pearl         6    53.0    9    12.85    0.0   64    72           72    +8
99   Bonanza              3    53.0    99   0.00     3.0   -     66           66    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Night Tiger 75 67 80 -13 0.0 -
2 Dance Variety Line 83 114 83 +31 2.0
3 Benjamin 78 75 79 -4 3.5 -
4 Axl 70 84 72 +12 3.0 -
5 Kimball O'Hara 74 61 74 -13 2.0 -
6 Swift Action 71 77 73 +4 3.0 -
7 Gimme's Laddie 83 101 83 +18 2.0 -
8 Fort Red 77 66 78 -12 3.5 -
9 Winter Pearl 64 71 72 -1 0.0 -
99 Bonanza - 57 66 -9 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