more-cleanup vs master

  LLR +3.08 −2.94LO +2.94HI BOUNDS for −5.00LO +0.00HI ELO
  ELO +0.02 ± 2.01 (−1.99LO +2.03HI)
 CONF 8.0+0.08 with 1 THREAD 16 MB CACHE
GAMES 29216 (²⁴·²%7067W ⁵¹·⁶%15084D ²⁴·²%7065L)
PENTA 97+² 3303+¹ 7835⁰ 3251−¹ 122−²

  LLR +3.08 (−2.94LO +2.94HI BOUNDS for −5.00LO +0.00HI ELO)
  ELO +0.02 ± 2.01 (−1.99LO +2.03HI)
 CONF 8.0+0.08 (1 THREAD 16 MB CACHE)
GAMES 29216 (7067W24.2% 15084D51.6% 7065L24.2%)
PENTA 97+2 3303+1 7835+0 3251−1 122−2

  LLR +3.08 (−2.94 LO +2.94 HI BOUNDS for −5.00 LO +0.00 HI ELO)
 PERF +0.02 ± 2.01 ELO (−1.99 LO +2.03 HI ELO)
 CONF 8.0+0.08 SEC (1 THREAD 16 MB CACHE)
GAMES 29216 (7067 W 15084 D 7065 L = 24.2% W 51.6% D 24.2% L)
PENTA 97⁺² 3303⁺¹ 7835⁰ 3251⁻¹ 122⁻²