Xiangqi vs janggi: how Korean chess rewires the same 9x10 board — diagonal palaces, roaming elephants, screen-hungry cannons, and the bikjang draw rule.
Xiangqi vs janggi is the closest sibling rivalry in the whole chess family, because Janggi (장기, Korean chess) grew directly out of Xiangqi (象棋). Same 9x10 board, same seven kinds of pieces, even the same Chinese characters on many of them — and yet Korea quietly rewired how half of those pieces behave.
If you know one, you can learn the other in an afternoon and then lose for two weeks while the changed rules sink in. That's not a knock; it's the fun of it. Having bounced between the two, I can tell you the hard part isn't memorizing new pieces — it's unlearning old reflexes. Here's exactly what shifts.
The board and the palace
Both games use a board of 9 files and 10 ranks, sixteen pieces a side, all resting on the intersections. The starting cast is the same: a general, two guards, two elephants, two horses, two chariots, two cannons, and five soldiers. The most visible difference is that Xiangqi has a river the elephants and soldiers must respect, while Janggi's central band is just paint — pieces cross it freely, and elephants roam the whole board.
Look closer at the palace and you'll spot diagonal lines drawn corner to corner in the Janggi version. Those diagonals are real roads, not decoration.
In Janggi the general and its guards can travel along those palace diagonals as well as the straight lines, so a general parked on the center point covers more directions than its Xiangqi cousin, which only ever steps one point orthogonally. The Xiangqi general is a pure prisoner; the Janggi general is a prisoner with a slightly nicer cell.
Pieces that stayed, and pieces that changed
The chariot and the horse make the jump almost untouched. The chariot slides like a rook in both games — and in Janggi it can also ride the palace diagonals — and the horse makes the same knight-style step and is stopped by the same leg-blocking rule in both. If you only played those two, you'd barely notice you'd switched games.
The elephant is where habits get you burned. A Xiangqi elephant steps exactly two points diagonally, can't cross the river, and is blocked at its 'eye.' The Janggi elephant is a different animal: it moves one point straight and then two points diagonally outward, a long three-step leap that can cross the entire board and can be blocked at any point along that path. I still misjudge its reach when I've been playing too much Xiangqi.
Soldiers shift too. A Xiangqi soldier plods one point forward and only earns a sideways step after crossing the river. A Janggi soldier can step forward or sideways from the very first move — there's no river gate to wait behind — and it can follow the palace diagonals once it reaches the enemy palace. Neither one ever retreats.
The cannon is where it all goes sideways
The cannon is where Janggi diverges hardest, and it trips up every Xiangqi player alive. Both cannons capture by jumping exactly one screen piece. But a Janggi cannon needs a screen even to move a single point — it can never glide down an empty line the way a Xiangqi cannon happily does from the opening.
On top of that, a Janggi cannon may not jump over another cannon, may not capture a cannon, and may not use a cannon as its screen. In Xiangqi the cannon is a nimble early sniper you fling out on move one; in Janggi it's a heavier weapon that only fires when the board is arranged just so, which is why Janggi players fuss endlessly about parking a friendly piece as a launch pad.
Get this one difference wrong and you'll reach for a cannon on an open file, find it can't move, and hand your opponent a free tempo. Ask me how I know. Retraining the cannon is honestly the single biggest job in crossing between the two games.
Setup choices and the bikjang draw
Janggi hands you a choice Xiangqi never does. Before the game starts, you may swap the opening positions of your horse and elephant on each wing, which produces several standard setups and a little rock-paper-scissors of formations. Xiangqi's starting position is completely fixed — everyone begins from the same square one.
The most surprising rule is what happens when the two generals end up facing each other on an open file. In Xiangqi that's the illegal flying-general position, flat-out forbidden. In Janggi the same face-off is called bikjang and is scored as a draw instead.
Janggi also often counts material as points and gives one side a small handicap to offset the advantage of moving first, with some rulesets even letting a player pass. That means a Janggi game can be won by a slim material margin rather than a knockout — a genuinely different endgame incentive from Xiangqi's all-or-nothing hunt for checkmate. You play the final phase watching a scoreboard, not just the general.
Which one should you learn?
If you like a sharp, structured fight, Xiangqi's river and fixed setup give it a classical shape. If you want a busier, more fluid opening with free-roaming elephants and a general that can slide diagonally, Janggi delivers that. Honestly, knowing one makes the other richer — they're two answers to the same question, and neither is 'better.'
My advice: get solid at Xiangqi first, since its fixed rules give you a stable foundation, then branch into Janggi to see how Korea reimagined the very same board. Play a few games on XiangqiPlay to lock in how the cannon, elephant, and soldier really move — then, when you meet a Janggi board, you'll feel every clever thing Korea changed.