Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION MR 73 HANDICAP (Open)

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Line Horse
Top Sail
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
7 / 11
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    African Torrent      2    58.0    1    0.00     0.0   81    77           81    +0
2    Celestial City       4    59.5    2    0.75     3.0   73    78           78    +5
3    Top Sail             2    56.5    3    1.20     0.0   78    78           78    +0
4    Foreign Field        4    60.0    4    1.25     3.0   73    79           79    +6
5    Sequoia              6    59.5    5    2.50     0.0   73    82           82    +9
6    Chasing Mavericks    4    56.0    6    3.50     3.0   65    68           68    +3
7    Global Breeze        2    54.5    7    6.00     0.0   74    70           70    -4
8    Bally Magic          6    57.5    8    8.25     0.0   69    76           76    +7
9    Wondering Star       3    57.0    9    9.25     6.0   68    63           63    -5
99   Fifth Of July        5    60.0    99   0.00     0.0   -     81           81    +0
99   Duke Of Rain         3    58.5    99   0.00     6.0   -     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 African Torrent 81 68 81 -13 0.0 -
2 Celestial City 73 92 78 +14 3.0 -
3 Top Sail Line 78 85 78 +7 0.0
4 Foreign Field 73 73 79 -6 3.0 -
5 Sequoia 73 99 82 +17 0.0 -
6 Chasing Mavericks 65 65 68 -3 3.0 -
7 Global Breeze 74 75 70 +5 0.0 -
8 Bally Magic 69 60 76 -16 0.0 -
9 Wondering Star 68 67 63 +4 6.0 -
99 Fifth Of July - 63 81 -18 0.0 -
99 Duke Of Rain - 70 66 +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