Official NHA Assessment

Race 7: JACKPOT CITY DINGAANS (Grade 2) (For 3 year-olds)

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Line Horse
Jan Van Goyen
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
2 / 13
Within 2 points
Significant Diffs
9 / 13
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    Trust                2    60.0    1    0.00     0.0   92    113          98    +6
2    Jan Van Goyen        2    60.0    2    0.70     0.0   118   118          118   +0
3    All Systems Go       3    60.0    3    5.10     7.0   96    99           99    +3
4    Shadowfax            2    60.0    4    5.40     0.0   104   113          113   +9
5    Copper Eagle         2    60.0    5    6.30     0.0   91    113          113   +22
6    Chronicle King       2    60.0    6    7.20     0.0   114   113          113   -1
7    Singleton Sam        2    60.0    7    8.20     0.0   91    113          113   +22
8    Zalatoris            2    60.0    8    8.25     0.0   105   113          113   +8
9    Tin Pan Alley        2    60.0    9    8.65     0.0   116   113          113   -3
10   Tommy Shelby         2    60.0    10   9.65     0.0   97    113          113   +16
11   Tenjiku              2    60.0    11   11.65    0.0   104   113          113   +9
12   Whispering Death     2    60.0    12   14.25    0.0   104   113          113   +9
13   Echo Check           2    60.0    13   24.50    0.0   98    113          113   +15
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Trust 92 110 98 +12 0.0 -
2 Jan Van Goyen Line 118 118 118 ✓ Match 0.0
3 All Systems Go 96 102 99 +3 7.0 -
4 Shadowfax 104 102 113 -11 0.0 -
5 Copper Eagle 91 100 113 -13 0.0 -
6 Chronicle King 114 115 113 +2 0.0 -
7 Singleton Sam 91 98 113 -15 0.0 -
8 Zalatoris 105 108 113 -5 0.0 -
9 Tin Pan Alley 116 128 113 +15 0.0 -
10 Tommy Shelby 97 101 113 -12 0.0 -
11 Tenjiku 104 96 113 -17 0.0 -
12 Whispering Death 104 99 113 -14 0.0 -
13 Echo Check 98 98 113 -15 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