Official NHA Assessment

Race 9: NEXT TURFFONTEIN RACEMEETING THURSDAY 14 MARCH PINNACLE STAKES (Open)

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Line Horse
Meridius
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
4 / 12
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    Shoemaker            2    54.0    1    0.00     0.0   108   102          102   -6
2    Meridius             2    56.0    2    1.25     0.0   110   110          110   +0
3    Gilded Butterfly     3    53.5    3    2.50     4.5   111   94           101   -10
4    Litigation           3    58.0    4    3.50     4.5   115   102          105   -10
5    Ipso Facto           2    50.0    5    3.65     0.0   94    95           95    +1
6    Street Art           3    56.0    6    3.75     4.5   110   98           100   -10
7    Whafeef              6    50.0    7    4.25     0.0   101   95           95    -6
8    Aragosta             3    56.0    8    7.00     4.5   118   97           108   -10
9    Twin Turbo           4    50.0    9    7.10     2.0   96    90           90    -6
10   Nebraas              8    56.0    10   12.00    0.0   112   106          106   -6
11   Zeus                 3    62.0    11   13.50    4.5   122   109          112   -10
12   River Romeo          2    50.0    12   34.00    0.0   101   94           94    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Shoemaker 108 109 102 +7 0.0 -
2 Meridius Line 110 115 110 +5 0.0
3 Gilded Butterfly 111 108 101 +7 4.5 -
4 Litigation 115 113 105 +8 4.5 -
5 Ipso Facto 94 92 95 -3 0.0 -
6 Street Art 110 78 100 -22 4.5 -
7 Whafeef 101 91 95 -4 0.0 -
8 Aragosta 118 109 108 +1 4.5 -
9 Twin Turbo 96 88 90 -2 2.0 -
10 Nebraas 112 101 106 -5 0.0 -
11 Zeus 122 117 112 +5 4.5 -
12 River Romeo 101 94 94 ✓ Match 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