Arimaa/Lone Elephant Attacks

A Lone Elephant Attack occurs when an elephant advances while the rest of its army stays behind. Extended lone elephant attacks were popular early in Arimaa history, and may still work if the opponent isn't good at multi-piece trap attacks.

a b c d e f g h 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 a b c d e f g h

By pulling rabbits, the gold elephant has disrupted Silver's trap defense. (Game)

• to push and pull enemy pieces toward one's home traps for potential capture
• to disrupt the enemy defensive position
• to threaten capture in a poorly defended away trap, perhaps during a race

At right, the gold elephant has pulled two silver rabbits to the sixth rank. Unable to retreat homeward, these rabbits are vulnerable to eventual capture in f3, but Gold might leave them in place and first go after the silver camel, whose escape paths are limited. If the silver camel flees west, the eastern gold horse might safely advance. An initial lone elephant attack might thus pave the way for a multi-piece trap attack, which could in turn become a goal attack if the opponent is weak in the area. Due to the position of the rabbits, defending f6 might now be tricky for Silver. Silver may thus need to quickly move ahead with a multi-piece attack against c3 or f3.

• Advancing an elephant beyond the sixth rank, or into a corner, may expose it to a blockade.
• An elephant in a corner cannot immediately defend against a threat on the other wing.
  • A gold elephant in the northeast corner would need at least two turns to defend the c3 trap.
• An enemy piece dragged forward might itself create a threat.
  • Enemy rabbits dragged forward, but not captured, may later become goal threats.
• One who keeps nearly all friendly pieces at home could become cramped if the opponent plays aggressively.

When the enemy elephant pulls non-rabbit pieces, there are defensive and counter-attacking options:

• Use friendly pieces, especially the elephant, to help pulled pieces retreat.
• Respond in kind, pulling enemy pieces homeward.
• Launch a multi-piece trap attack, which might make it hard for the opponent to continue with lone elephant play.

When the opponent pulls rabbits, the options are similar, but narrower. Since rabbits can't retreat homeward, it is urgent to counterattack somehow.

a b c d e f g h 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 a b c d e f g h

Dual Lone Elephant game after 9s.

A Dual Lone Elephant game occurs when neither player actively uses any piece other than his elephant. This was a Dual Lone Elephant game until 14s, when Silver advanced a horse. Although neither side took advantage of this, the d- and e-file rabbits were vulnerable here. One who intends to begin with a lone elephant attack should probably use a 99of9 setup, which allows for flexibility.

If players shield their rabbits and retreat pulled pieces, a Dual Lone Elephant opening might go on and on without capture. In other cases, players might simply pull pieces on opposite wings and gradually decimate each other's armies. Either way, deviation from lone elephant play will be key to the outcome. One might advance non-elephant pieces into weakly defended territory, setting up a trap attack or goal attack.

This Dual Lone Elephant game featured sweeps beneath the traps, rabbit pulls along the perimeter, and threats to push stronger pieces into the center. Gold outdid Silver, capturing five rabbits while losing only one rabbit himself in the first 51 turns. Had Silver played differently, however, Gold would not have had time for such methodical play.