quadrupled-pawns2.cql
// Download quadrupled-pawns2.cql// PGN output when run on sample.pgn
/********* Find games with quadrupled pawns. This uses the square filter **********/ cql(input hhdbvi.pgn) s∊a-h1 ⬓ ♙∩vertical s ≥4
/********* Find games with quadrupled pawns. This uses the square filter **********/ cql(input hhdbvi.pgn) s∊a-h1 ⬓ ♙∩vertical s ≥4