August 22, 2009
if the theme and setting of a particular problem has already appeared in an earlier problem without the knowledge of the later composer, the problem is said to be anticipated. The position does not have to be exactly the same, just very similar. Where this is done deliberately by the later composer, the term plagiarised is more appropriate. There is a real chance of anticipation if the problem has a relatively simple theme, since there are only a finite number of positions and themes, and chess problems have been composed for hundreds of years. However, anticipations are not always noticed immediately.
P.F. Copping 1st Prize The Problemist, 1961 Mate in 3 moves (11+14)
1. Qe2! [2. Qf3+ Se4 3. Qxe4#] 1…Qxg8 / Qh7 / Qh6 / Qh5 / Qh4 / Qg7 / Qf6 2. Qf3+ Se4 3. Qxe4# 1…Qe5 2. Sf7 [3. Se7, Sb6#] 2…Sa8, Sxa4, Ba1/d4 3. Se7#, 2…Qg5/xd6/f6 3. Sb6#, 2…Ba3 3. Se7, Qxe5#, 2…Bc3 3. Se7, Qc4# 1…Qd4 2. Kxc7 [3. Se7, Sb6#] 2…Sxa4/e4/b3/d3, Qb4, Ba1/c3 3. Se7#, 2…Qf6/g7 3. Sb6#, 2…Ba3 3. Se7, Raxd4, Rfxd4# 1…Qc3 2. Sxb7 [3. Se7, Sb6#], 2…Sa8, Qb3/b4/a5, Ba1/a3 3. Se7#, 2…Sxb7 3. Qe4#, 2…Sxa4 3. Se7, Qe4#, 2…Qf6/g7 3. Sb6#