Old Indian Defense Other Variations Skewer in Chess

In the Old Indian Defense “other variations,” a skewer occurs when a line piece (often a bishop or rook) attacks a front target and forces a more valuable piece behind it to move. A defining feature is that Black’s setup commonly places pieces on the same file/diagonal so a tactical “line attack” becomes possible after a specific move order. The result is a forced sequence where the back piece can’t stay protected while the front piece is displaced.