Official NHA Assessment

Race 8: RACEHORSE OWNERS ASSOCIATION MR 66 HANDICAP (Open)

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Line Horse
Clap Of Thunder
Reference for assessment
Exact Matches
0 / 14
Calculated = Official
Close Matches
6 / 14
Within 2 points
Significant Diffs
5 / 14
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    My Best Shot         3    60.0    1    0.00     1.5   88    64           88    +0
2    Arturo               2    58.0    2    2.50     0.0   66    65           65    -1
3    Clap Of Thunder      3    60.5    3    3.25     1.5   67    67           67    +0
4    Charlie Malone       5    60.0    4    3.50     0.0   66    68           68    +2
5    Wind Sock            3    59.5    5    5.00     1.5   65    63           63    -2
6    Destiny's Angel      3    61.0    6    5.05     1.5   68    66           66    -2
7    Absolu Noir          8    52.0    7    6.30     0.0   47    51           51    +4
8    Gunsmoke             3    61.5    8    8.05     1.5   69    67           67    -2
9    Mister Whistle       4    52.5    9    8.55     0.5   53    51           51    -2
10   Valyrian Sword       2    50.5    10   10.30    0.0   51    48           48    -3
11   My Ami Beach         6    58.0    11   11.30    0.0   70    63           63    -7
12   Admiral's Ransom     3    52.5    12   11.80    1.5   51    49           49    -2
13   Swiss Walt           4    60.5    13   12.30    0.5   71    67           67    -4
14   Princess Azariah     2    56.0    14   33.55    0.0   62    59           59    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 My Best Shot 88 116 88 +28 1.5 -
2 Arturo 66 76 65 +11 0.0 -
3 Clap Of Thunder Line 67 66 67 -1 1.5
4 Charlie Malone 66 71 68 +3 0.0 -
5 Wind Sock 65 68 63 +5 1.5 -
6 Destiny's Angel 68 92 66 +26 1.5 -
7 Absolu Noir 47 50 51 -1 0.0 -
8 Gunsmoke 69 68 67 +1 1.5 -
9 Mister Whistle 53 52 51 +1 0.5 -
10 Valyrian Sword 51 50 48 +2 0.0 -
11 My Ami Beach 70 70 63 +7 0.0 -
12 Admiral's Ransom 51 48 49 -1 1.5 -
13 Swiss Walt 71 74 67 +7 0.5 -
14 Princess Azariah 62 62 59 +3 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