[Chess] Concentration of power enables tactics

In chess as in other games, players assist their ability to calculate with a recognition of common patterns between games. Here, International Master Christof Sielecki (aka Chessexplained on YouTube and Twitch) briefly draws our attention to the simple but critical point that concentrations of power can enable tactical shots. This general pattern appears in non-chess games as well.

[AoE2] Early and midgame commentary selections

YouTuber ZeroEmpires provides insightful Age of Empires II coverage on a game between players Skittles and Melkor. The whole cast is great, but here are a few moments of especially clear presentation.

First an assessment of Skittle's unfortunate spawn location:

The open terrain around Skittle's base enabled early harassment that in turn contributed to an economic advantage for Melkor:

Melkor's larger and safer economy is invested in an army size and upgrade advantage which in turn is used to keep some pressure against Skittle's awkward home terrain, preserving Melkor's economic advantage:

Melkor takes a cost-efficient tactical shot with a well-chosen armor upgrade to enable raiding under watchtowers. Skittles continues to lose gathering time with his villagers: