ChessOverloading is when one enemy piece has two defensive jobs at the same time. It can only do one thing at a time. Force it to handle the first job, and nobody is left to handle the second. Whenever you play a free chess game, ask yourself: "How many things is this enemy piece guarding right now?"
What it looks like
Black's rook on d8 has two jobs: protecting the knight on d5, and guarding the back rank so the white rook can't land on e8.
But if the black rook takes the queen, it leaves the 8th rank and nobody guards e8:
So Black can't take back, and is simply a knight down. The rook on d8 had two jobs at once. That's overloading.
Common kinds of overloading
One pawn guarding two pieces
Pawns get overloaded easily too. Here the black pawn on d6 protects both the knight on c5 and the bishop on e5:
White gives a bishop and gets a knight and a bishop, winning a piece. If Black doesn't take the bishop back, he's simply a knight down.
The queen gets overloaded most
The queen can guard anything, so she often gets sent to guard too much.
A real example: a trap in Alekhine's Defense
Kings get overloaded too. In one line of Alekhine's Defense, the black king protects both the pawn on f7 and the queen on d8:
The black king was guarding two things on its own. White hit one of them first, and the other couldn't be held.
How to defend
- Count what each of your pieces is guarding. One piece protecting two or more things is a warning sign.
- Send another piece to help. Important pieces and squares are best guarded twice.
- Give your king an escape square. Lots of overloading has to do with the back rank. Push h6 or g6 once, and the piece guarding the back rank no longer has to stay tied there.
- Trade off the attacker first. If you can trade the piece your opponent would use to hit your overloaded piece, the problem goes away.
Practice puzzles
Show answer
1. Bxf5 The bishop takes the bishop on f5 first. When the e6 pawn takes back, the knight on d5 is left unprotected, and the white rook takes it. White gives one bishop for two pieces. Taking the knight with the rook first also wins something, but a rook is worth more than a bishop, so you win less.
Show answer
1. Rxd5 Nxd5 2. Qxh7# The white rook takes the bishop on d5. If the knight takes back, it no longer guards h7, and the white queen, backed by the bishop on b1, takes on h7. Checkmate. If the knight doesn't take back, White is simply a bishop up.
Show answer
1... Qxd4 2. Rxd4 Re1# The black queen takes the knight on d4. If the white rook takes back, it leaves the 1st rank, and the black rook lands on e1. Checkmate. If the rook doesn't take back, White is a knight down.
FAQ
What's the difference between overloading and deflection?
They're close and often come together. Overloading is the weakness: one enemy piece has too many jobs. Deflection is the action: a move that drags that piece away. When you spot an overloaded piece, you usually break it with a deflection.
How do I spot overloading at a glance?
Look for your opponent's only defenders. If the same piece is the only defender of two different things, it's overloaded. The usual suspects are a rook guarding the back rank, a pawn protecting two pieces, and a queen helping out everywhere.
Can the king be overloaded?
Yes. The king is often the only defender of f7 (f2 for White) while also protecting a queen or rook next to it. A sacrifice with check lures the king away, and the piece next to it is left unguarded.
Try it yourself
Overloading often goes hand in hand with deflection and forks. Look at the other tactics in chess tactics, or review the fork first. Then play some online chess against the computer and, every move, count what your opponent's pieces are guarding.