A Portrait of the Babson-Task as a Young Man ...
Joseph Ney Babson in 1873
... In the beginning, there was just a Babson-Task without a key...
(1) Pierre Drumare
"Thèmes 64" 1965
NOTE (completed june 22th): (To insert this one in Your Chess Engine, the 'f' Pawn should be placed in f2, You play successively to f1 Q, R, B and N and the machine as white will answer with the Echoes Q, R, B, and N) - With the others You insert the FEN and let the machine find the Key, and You can play as black the defenses. The exception is the last one - number (17) - where a thematic try is to be found)
...there was nothing missing, but a proper introduction - and so the sixties gone away without a Babson-Task with a key.
The space race produced a perfect moon landing still in the sixties, but the Babson-Task race went until the early eighties, with some mixed results...
(2) Bo Lindgren "Probleemblad" 1972 #5 1.Qxf3! FEN 1rN3q1/P2R2PR/B4p1K/Bp1n1P1Q/7p/1B1kPr1P/1Pp3P1/8
(3) Pierre Drumare "Memorial Seneca" 1980 Sp Pr #5 1.Rf2! FEN 3R2qB/5P2/1N5B/1K3P2/RPP1pR2/1B1Pn3/Rppkn1p1/bQbrrbrb
(4) Peter Hoffmann "Die Schwalbe" 1982 #4 1.Nh5! FEN Q1bRR3/1P6/1p1NPNP1/1P1Pk3/1Kpn3p/2B1bppr/3pRpBb/3R1nBr
Almost a handfull of complete Babson-Tasks. Some supernumerary pieces (Your engine will not be troubled by them...) - The keys were being slowly improved: Lindgren takes a Rook and three (!) flights, and moreover sets a battery, Drumare fires a battery, and moreover pins both black Knights; and Hoffmann (relativelly the best) just give-and-take a flight and takes another with his Knight jump ...
Then - 1983 came. And novelties from the USSR
(5) Leonid V. Yarosh "Shakhmaty v SSSR" 1983 #4 1.Rxh4! FEN 1q5R/P2N4/5p2/2p2p2/2Pk1b1n/6P1/PNpP1P1K/BQ3R1B
A jump for the Babson-Task, but the "Record of the Twentieth Century" , "Non Perishable Problem", "Resplendent Diamond" could still win an improved version (Mainly because the key was still .. well - Rook takes Knight pining a Bishop and preventing two checks)
(6) Leonid V. Yarosh
"Shakhmaty v SSSR" 1983
FEN Bq1B1K2/3PpN2/P3Pp2/P1p2P2/2Pk1b1R/1p6/pN1P1P2/QR6 *Key: 1. a7!!
The white Babson-Pawn advance from 'a6' to 'a7', threatening nothing but it's very promotions. This perfectly thematical key was already a favorite in the 'Partial' (or 3/4) Babsons since the middle of the Century. The idea of a white Babson-Pawn 'approaching' the eight horizontal is here associated to a wonderfull algorithm, and Yarosh produces finally "The Eight Wonder", "Diagram of the Century" (Tim Krabbé), and even "Problem of the Millenium" (in a poll of the Dutch Society, covering the years between 1001 and 2000). *****(NOTE: Thanks to David Moody, from Detroit MI, for the Babson photo above)