Official NHA Assessment

Race 10: NEXT TURFFONTEIN RACEMEETING THURSDAY 16 MARCH MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Tamarisk Tree
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 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    Willow's Wish        4    56.0    1    0.00     2.0   85    89           89    +4
2    Supreme Dance        4    60.0    2    0.10     2.0   94    97           97    +3
3    Tamarisk Tree        5    54.0    3    3.50     0.0   90    90           90    +0
4    Southern Song        4    53.5    4    5.00     2.0   85    84           84    -1
5    Libeccio             5    50.0    5    7.00     0.0   76    81           81    +5
6    Motown Magic         3    58.0    6    7.25     4.5   89    88           88    -1
7    Ballroom Bliss       4    53.5    7    11.00    2.0   84    84           84    +0
8    Allez Moris          2    54.0    8    15.00    0.0   90    89           89    -1
9    Invincible Warrior   4    54.0    9    34.00    2.0   80    85           85    +5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Willow's Wish 85 96 89 +7 2.0 -
2 Supreme Dance 94 76 97 -21 2.0 -
3 Tamarisk Tree Line 90 105 90 +15 0.0
4 Southern Song 85 90 84 +6 2.0 -
5 Libeccio 76 62 81 -19 0.0 -
6 Motown Magic 89 75 88 -13 4.5 -
7 Ballroom Bliss 84 84 84 ✓ Match 2.0 -
8 Allez Moris 90 95 89 +6 0.0 -
9 Invincible Warrior 80 76 85 -9 2.0 -
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