Official NHA Assessment

Race 4: PLAY SOCCER 6, 10 AND 13 MR 80 HANDICAP (Open)

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Line Horse
Silvery Surfer
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
7 / 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    Igugulethu           2    60.5    1    0.00     0.0   81    96           81    +0
2    Silvery Surfer       3    56.5    2    0.25     7.0   74    74           74    +0
3    Pedro                6    57.5    3    0.35     0.0   75    95           95    +20
4    Guarding The Wall    4    55.5    4    1.35     4.5   70    80           80    +10
5    Pyromaniac           6    59.0    5    1.45     0.0   78    96           96    +18
6    Mr Belvedere         4    52.5    6    1.55     4.5   65    74           74    +9
7    New Mexico           2    62.0    7    1.60     0.0   84    102          102   +18
8    One Scotch           2    56.5    8    2.10     0.0   82    91           91    +9
9    Arabian Red          4    60.0    9    2.85     4.5   80    88           88    +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Igugulethu 81 83 81 +2 0.0 -
2 Silvery Surfer Line 74 72 74 -2 7.0
3 Pedro 75 72 95 -23 0.0 -
4 Guarding The Wall 70 67 80 -13 4.5 -
5 Pyromaniac 78 71 96 -25 0.0 -
6 Mr Belvedere 65 55 74 -19 4.5 -
7 New Mexico 84 83 102 -19 0.0 -
8 One Scotch 82 77 91 -14 0.0 -
9 Arabian Red 80 74 88 -14 4.5 -
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