Official NHA Assessment

Race 7: RACE COAST CLASS 4 (Open. Benchmark at 60.0kg = 80)

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Line Horse
Sweeper Keeper
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
3 / 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    Wing Walker          3    60.5    1    0.00     8.5   82    75           75    -7
2    Run To Rio           4    54.0    2    0.60     6.0   68    72           72    +4
3    Sweeper Keeper       4    55.0    3    3.80     6.0   70    70           70    +0
4    Firelighter          3    55.0    4    5.30     8.5   71    64           64    -7
5    Dont Judge           2    60.5    5    6.30     0.0   82    92           92    +10
6    Sea Shanty           4    57.0    6    8.80     6.0   74    73           73    -1
7    Griffin Park         4    53.5    7    9.60     6.0   67    66           66    -1
99   Slytherin            3    55.0    99   0.00     8.5   -     64           64    +0
99   King Of Numbers      4    60.0    99   0.00     6.0   -     79           79    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Wing Walker 82 87 75 +12 8.5 -
2 Run To Rio 68 71 72 -1 6.0 -
3 Sweeper Keeper Line 70 67 70 -3 6.0
4 Firelighter 71 63 64 -1 8.5 -
5 Dont Judge 82 74 92 -18 0.0 -
6 Sea Shanty 74 71 73 -2 6.0 -
7 Griffin Park 67 58 66 -8 6.0 -
99 Slytherin - 70 64 +6 8.5 -
99 King Of Numbers - 75 79 -4 6.0 -
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