Ruy Lopez that after the common retreat 4.Ba4, Black will have the possibility of breaking a future pin on his by playing ...b5. White must take some care not to fall into the Ruy Lopez, Noah's Ark Trap, in which Black traps White's on the b3-square with a ...a6, ...b5, and ...c4 pawn advance on the . Ercole del Rio, in his 1750 treatise "Sopra il giuoco degli Scacchi, Osservazioni pratiche dell'anonimo Modenese" (On the game of Chess, practical Observations by an anonymous Modenese), was the first author to mention 3...a6. However, the move became popular after it was played by Paul
Army Moves to a review in Zzap!. However, it received mixed reviews from ZX Spectrum magazines and was successful enough in Spain to spawn two follow-ups, Navy Moves in 1988 and Arctic Moves in 1995. The latter appeared only for the PC platform, and it included the first two chapters of the series, playable through a ZX Spectrum emulator, as an extra. A fourth entry in the series, "Desert Moves" was announced at the end of the game Arctic Moves, but never appeared. The game music in non-Spanish versions is based on the Colonel Bogey March. Army Moves Army Moves is a