Official NHA Assessment

Race 6: play.tabonline.co.za CLASS 4 (Open. Benchmark at 60.0kg = 78)

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Line Horse
Katsu
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
5 / 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    Rule Of Thumb        2    56.5    1    0.00     0.0   72    85           78    +6
2    Gentleman Joe        3    55.5    2    0.30     9.0   69    70           70    +1
3    Katsu                3    57.0    3    0.35     9.0   73    73           73    +0
4    Sylvan Theater       3    58.0    4    2.10     9.0   75    73           73    -2
5    Tothemoonandback     5    57.5    5    3.35     0.0   74    88           88    +14
6    Global Ally          6    61.5    6    4.10     0.0   81    96           96    +15
7    Que Shiraz           3    57.0    7    4.60     9.0   72    68           68    -4
8    Ntabazondi           3    56.0    8    7.35     9.0   70    66           66    -4
9    Guy Alexander        3    57.0    9    24.10    9.0   72    68           68    -4
99   Max The Otter        2    60.5    99   0.00     0.0   -     93           93    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rule Of Thumb 72 86 78 +8 0.0 -
2 Gentleman Joe 69 83 70 +13 9.0 -
3 Katsu Line 73 81 73 +8 9.0
4 Sylvan Theater 75 73 73 ✓ Match 9.0 -
5 Tothemoonandback 74 69 88 -19 0.0 -
6 Global Ally 81 97 96 +1 0.0 -
7 Que Shiraz 72 72 68 +4 9.0 -
8 Ntabazondi 70 70 66 +4 9.0 -
9 Guy Alexander 72 72 68 +4 9.0 -
99 Max The Otter - 72 93 -21 0.0 -
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