FIDE Performance Rating

1. 1 · Score2.5 / 4 (62.5%)
2. 2 · Average opponent rating R_a2050
3. 3 · d(p) from FIDE Table 8.1b at p = 0.63+95
4. 4 · Performance rating R_a + d(p)2145

The iterative figure solves for the rating at which your expected score exactly equals your actual score — a stricter numerical method that agrees with the table within rounding but avoids the table’s 1%-granularity steps.