How do you play a bare horse versus horse endgame?
These answers restate the rules implemented by our open-source engine, which follows the WXF laws and is regression-tested against the official 110-diagram repetition casebook. Where an answer refers to a specific position, that position lives on the linked reference page, where the build verifies it against the engine before publishing.
Direct answer
With nothing else on the board, horse versus horse is generally a draw with accurate play from both sides. Neither horse has enough independent force to overpower the other or to force a breakthrough against careful, central defence, so the practical goal for both players is usually just not blundering the piece away.
Why neither side can normally force progress
A single horse can defend itself and its general's immediate surroundings adequately as long as it stays reasonably central and does not wander into a position where it can be trapped or forked by the opposing horse. Without additional material to create a second threat, there is rarely a way to overload the defence.
Where the practical danger actually lies
Games are not lost through some forced technique here so much as through a horse getting stranded on the rim of the board, blocked by its own leg at an inconvenient moment, or wandering within reach of a fork. Keep the horse active and central, and treat any drawing chances your opponent creates with the same care you would in a more materially complex position.
Related questions
Does having soldiers on the board change this a lot?
Yes, considerably; the addition of even one soldier each can turn a clean draw into a genuine fight, which is covered separately at horse endgames.
Is this endgame ever worth playing on for practical chances?
Against a weaker opponent it can be, since the drawing technique, while simple, is not always intuitive to a less experienced player.