| DoctorD: Well-known American composer with a theme named after him. Specialized in model mates, echoes, and cross-checks. Dr. GS Dobbs
American Chess Bulletin 1942
White to Play and mate in four
click for larger viewFrom: How To Solve Chess Problems, Kenneth S. Howard, Dover, 1945. "After Dr. Dobbs' death in 1941 this beautiful four-movers was found amongst his unpublished compositions." "The lines of play are echoed throughout and they terminate in two pairs of echoed mates, the mates in one pair being models. The odd pawn on e7 stops a second solution by 1. Qf7, while the white king is placed so as to prevent a solution by 1. Qh1+." 1. ♕d1 ♔xc5 2. ♕b1 ♔d5 3. ♕e1 ♔c5 4. ♕a5#
3... c5 4. ♕e4#
1... ♔xe5 2. ♕f1 ♔d5 3. ♕c1 ♔e5 4. ♕g5#
3... e5 4. ♕c4#
Here is one of his early cross-check problems:
Dr. GS Dobbs
Good Companions Meredith Tourney 1915
4th Prize
White to Play and mate in two
click for larger viewFrom: One Hundred Years of the American Two-Move Chess Problem, Kenneth S. Howard, Dover 1962. pg. 44. Shows "a conspicuous self-pinning self capture check by the black queen [in set-play]where white can mate by a return capture. ... white gives up the set mate and threatens a mate that will be unaffected by black's checking capture, but which will be a cross-check if black makes the capture." The set mate (1. .. ♕xe5+ 2. ♗xe5#) with a cross-checking mate) is replaced with 1. ♖h6! and now if 1. .. ♕xe5 then 2. ♖d6#, another cross-checking mate exploiting the pin on the queen. | 
Kibitzing
