🔍 Fix third killer move population logic

[eduherminio]

Score of Lynx-third-killer-condition-2059-win-x64 vs Lynx 2058 - main: 2178 - 2220 - 2904  [0.497] 7302
...      Lynx-third-killer-condition-2059-win-x64 playing White: 1455 - 769 - 1427  [0.594] 3651
...      Lynx-third-killer-condition-2059-win-x64 playing Black: 723 - 1451 - 1477  [0.400] 3651
...      White vs Black: 2906 - 1492 - 2904  [0.597] 7302
Elo difference: -2.0 +/- 6.2, LOS: 26.3 %, DrawRatio: 39.8 %
SPRT: llr -2.26 (-78.2%), lbound -2.25, ubound 2.89 - H0 was accepted

2061:

Score of Lynx-third-killer-condition-2061-win-x64 vs Lynx 2058 - main: 5260 - 5016 - 6450  [0.507] 16726
...      Lynx-third-killer-condition-2061-win-x64 playing White: 3512 - 1674 - 3178  [0.610] 8364
...      Lynx-third-killer-condition-2061-win-x64 playing Black: 1748 - 3342 - 3272  [0.405] 8362
...      White vs Black: 6854 - 3422 - 6450  [0.603] 16726
Elo difference: 5.1 +/- 4.1, LOS: 99.2 %, DrawRatio: 38.6 %
SPRT: llr 2.9 (100.2%), lbound -2.25, ubound 2.89 - H1 was accepted