Official NHA Assessment

Race 4: PLAY SOCCER 6, 10 AND 13 MIDDLE STAKES (For horses with nett rating of 92 and below)

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Line Horse
Graduation Time
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
5 / 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    Eyjafjallajokull     2    57.5    1    0.00     0.0   78    87           84    +6
2    Montelena            4    60.0    2    0.25     4.5   91    83           83    -8
3    Dubai Hills          4    55.5    3    0.75     4.5   78    78           78    +0
4    Graduation Time      4    53.5    4    2.25     4.5   73    73           73    +0
5    Thunder Master       6    57.5    5    2.75     0.0   82    89           89    +7
6    Purple Operator      3    55.5    6    5.75     7.0   74    69           69    -5
7    Path Of Choice       5    53.5    7    6.25     0.0   70    79           79    +9
8    Grey Smoke           2    57.5    8    6.35     0.0   79    87           87    +8
9    Lady Majorca         4    52.0    9    8.35     4.5   71    67           67    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Eyjafjallajokull 78 86 84 +2 0.0 -
2 Montelena 91 90 83 +7 4.5 -
3 Dubai Hills 78 95 78 +17 4.5 -
4 Graduation Time Line 73 70 73 -3 4.5
5 Thunder Master 82 80 89 -9 0.0 -
6 Purple Operator 74 74 69 +5 7.0 -
7 Path Of Choice 70 68 79 -11 0.0 -
8 Grey Smoke 79 77 87 -10 0.0 -
9 Lady Majorca 71 62 67 -5 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