Official NHA Assessment

Race 7: TAB GAUTENG GUINEAS (Grade 2) (For 3 year-olds (1st Leg SA Triple Crown))

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Line Horse
Grand Empire
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
2 / 13
Within 2 points
Significant Diffs
8 / 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    Splittheeights       3    60.0    1    0.00     4.0   97    103          103   +6
2    Grand Empire         3    60.0    2    0.60     4.0   108   108          108   +0
3    Trust                2    60.0    3    0.90     0.0   119   115          115   -4
4    One Eye On Vegas     3    60.0    4    1.40     4.0   106   106          106   +0
5    Yippee Kiyay         2    60.0    5    2.15     0.0   101   114          114   +13
6    Tin Pan Alley        2    60.0    6    2.45     0.0   117   113          113   -4
7    All Systems Go       3    60.0    7    6.85     4.0   106   103          103   -3
8    King Harald          2    60.0    8    7.85     0.0   102   111          111   +9
9    Golden Warrior       2    60.0    9    9.25     0.0   103   111          111   +8
10   Radio Star           2    60.0    10   10.85    0.0   95    111          111   +16
11   I'm A Fireball       2    60.0    11   13.95    0.0   105   111          111   +6
12   Shadowfax            2    60.0    12   28.15    0.0   102   111          111   +9
13   Copper Eagle         2    60.0    13   29.15    0.0   103   111          111   +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Splittheeights 97 109 103 +6 4.0 -
2 Grand Empire Line 108 111 108 +3 4.0
3 Trust 119 110 115 -5 0.0 -
4 One Eye On Vegas 106 106 106 ✓ Match 4.0 -
5 Yippee Kiyay 101 105 114 -9 0.0 -
6 Tin Pan Alley 117 128 113 +15 0.0 -
7 All Systems Go 106 102 103 -1 4.0 -
8 King Harald 102 102 111 -9 0.0 -
9 Golden Warrior 103 97 111 -14 0.0 -
10 Radio Star 95 102 111 -9 0.0 -
11 I'm A Fireball 105 108 111 -3 0.0 -
12 Shadowfax 102 102 111 -9 0.0 -
13 Copper Eagle 103 100 111 -11 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