FEN: 1rb4k/p5np/3p1rp1/1ppB4/2N2P2/1P2R1P1/P1P4P/4R1K1 w - - 0 24
Source: Hard 2016.14 by Vincent Lejeune
Best move: Re8+

White sacrifies quality to force black in an amazing zugzwang position with still so many pieces left on the board.