Editorial runway · derived from lib-0860Endgame19×19Difficulty ★★★★★
Black to play — best endgame move
Black to play · Tap an empty intersection to place a stone
Coordinates use (x,y) with the top-left as (0,0). 19x19 puzzles may show only a local corner.
Shortcuts: Arrow keys move the cursor · Enter or Space places a stone · R resets · Esc clears the current move