Prokeš was joint Czech Champion in 1921 and played for the Czech Olympiad team in 1927, 1928, and 1930. In 1951 he published a collection of studies "Kniha šachových studií". His 1,159 endgame studies, as listed in Harold van der Heijden's database, rank fourth among all composers.
The Prokeš maneuver is a tactic in chess that enables a rook to draw against two advanced pawns in a chess endgame. Prokeš composed an endgame study in 1939 which illustrated the Prokeš maneuver for the first time. The solution begins:
- 1. Kg4 e2
- 2. Rc1+ Kd4
- 3. Kf3 d2
and Black threatens to promote a pawn, which would win. But White forces the draw with:
- 4. Rc4+! Kd3
- 5. Rd4+! Kxd4
- 6. Kxe2 Kc3
- 7. Kd1 Kd3 stalemate
The idea is, that by vacating the c1-square on the fourth move, White's rook prevents Black's pawn from capturing on c1. The white king is then able to reach the d1-square, stopping the pawn. The position after 6.Kxe2 is drawn (see King and pawn versus king endgame).
- Whyld, Ken (1986), Chess: The Records, Guinness Books, p. 159, ISBN 0-85112-455-0
- Prokeš, Ladislav team chess record at olimpbase.org
- My Computerised Collection Archived 2005-05-13 at the Wayback Machine by Harold van der Heijden. EG 130, October 1998, page 413.
- Article by Tim Krabbe (See Diagram 12.) Viewed 6 August 2007