Helpmate in 4
A neat single-line helpmate which should not prove too difficult to solve.
1.Qg1 Bb6 2.Kg3 Sxe4+ 3.Kh2 Sf2 4.Bg2 Bc7.
The knight must remove the pawn to allow the bishop to reach g2, but finds itself pinned by the queen, hence the white bishop, which must move to allow the king through, helps by unpinning the knight. The result is two switchbacks from an open position.
Richard Stein: This was indeed a cute solve, once I saw that black king on h2 would be mate with the bishop on g2 and the queen on g1. At first I thought I had a delightful little baklava-shaped rundlauf, with Sxe4-g3-h1-f2, though I then saw the two problems. So I had to “settle” for the nested switchback. We get our money’s worth with the line clearances and unpins.
Raju Rajendiran: Perfect timing and forced order of moves. Selfblock, pinning, unpinning, line clearance and interference – all in a miniature – stunning!!
Ravi Shankar: A neat single-line helpmate which did not prove too difficult to solve but brought a smile to my face!