0.05$       $0.13^{+0.01+0.02}_{-0.01-0.02}$    $0.15^{+0.02+0.02}_{-0.01-0.02}$       $0.07$
  $\bar{B}^0 \to K^0 \bar{K}^0$          $1.21 \pm 0.16$       $1.22^{+0.11+0.27}_{-0.08-0.24}$    $1.32^{+0.12+0.27}_{-0.08-0.25}$       $1.58$
  $B^- \to \pi^- \pi^0$              $5.48^{+0.35}_{-0.34}$    $5.20^{+0.64+1.11}_{-0.47-1.00}$    $5.59^{+0.68+1.15}_{-0.51-1.04}$        $5.1$
  $\bar{B}^0 \to \pi^+ \pi^-$            $5.10 \pm 0.19$       $5.88^{+0.66+1.66}_{-0.49-1.45}$    $5.74^{+0.64+1.63}_{-0.47-1.42}$        $5.2$
  $\bar{B}^0 \to \pi^0 \pi^0$        $1.91^{+0.22}_{-0.23}$    $1.67^{+0.22+0.25}_{-0.19-0.23}$    $2.13^{+0.29+0.32}_{-0.24-0.29}$        $0.7$
  $R_{+-}^{\pi \pi}$                     $1.99 \pm 0.15$       $1.64^{+0.06+0.13}_{-0.06-0.11}$    $1.80^{+0.07+0.17}_{-0.07-0.13}$       $1.82$
  $R_{00}^{\pi \pi}$                     $0.75 \pm 0.09$       $0.57^{+0.06+0.16}_{-0.06-0.12}$    $0.74^{+0.08+0.22}_{-0.08-0.17}$       $0.27$

  : The CP-averaged branching ratios (in units of $10^{-6}$) of $B$ ${\to}$ $\pi K$, $K \bar{K}$, $\pi \pi$ decays. For the Part A results of scenario I and II, the first and second theoretical uncertainties are caused by the CKM and other input parameters, respectively.[]{data-label="pikbr"}

                                      Exp. [@HFAG]               scenario I                          scenario II              S4 [@Beneke2]
  --------------------------------- ---------------- ----------------------------------- ----------------------------------- ---------------
  $B^- \to \pi^- \bar{K}^0$          $-1.5 \pm 1.9$   $-0.05^{+0.00+0.13}_{-0.00-0.15}$   $-0.17^{+0.01+0.14}_{-0.01-0.15}$       $0.3$
  $B^- \to \pi^0 K^-$                $4.0 \pm 2.1$       $3.2^{+0.2+0.6}_{-0.2-0.6}$         $2.5^{+0.1+0.6}_{-0.1-0.6}$         $-3.6$
  $\bar{B}^0 \to \pi^+ K^-$          $-8.2 \pm 0.6$     $-7.7^{+0.4+0.9}_{-0.4-0.9}$        $-9.1^{+0.4+0.9}_{-0.5-0.9}$         $-4.1$
  $\bar{B}^0 \to \pi^0 \bar{K}^0$     $-1 \pm 10$       $-10.3^{+0.6+0.9}_{-0.6-1.0}$       $-10.6^{+0.6+0.9}_{-0.6-0.9}$         $0.8$
  $\Delta A$                         $12.2 \pm 2.2$     $10.9^{+0.6+0.9}_{-0.5-0.8}$        $11.6^{+0.6+0.9}_{-0.6-0.8}$          $0.5$
  $B^- \to K^- K^0$                  $3.9 \pm 14.1$     $-0.6^{+0.0+3.2}_{-0.0-2.9}$         $2.0^{+0.1+3.4}_{-0.1-3.0}$         $-4.3$
  $\bar{B}^0 \to K^0 \bar{K}^0$       $-6 \pm 26$            $-17^{+1+2}_{-1-2}$                 $-16^{+1+2}_{-1-2}$             $-11.5$
  $B^- \to \pi^- \pi^0$              $2.6 \pm 3.9$      $-1.1^{+0.1+0.1}_{-0.1-0.1}$        $-1.2^{+0.1+0.1}_{-0.1-0.1}$         $-0.02$
  $\bar{B}^0 \to \pi^+ \pi^-$          $29 \pm 5$            $19^{+1+4}_{-1-4}$                  