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A superbly constructed three-mover by the great Dutch composer, showing four highly
Jacob Hoover: In the diagrammed position, if White moves the d4-knight, he threatens Qd4 mate as well as some knight mates depending on where the knight moves, but in each case Black refutes by moving the f6-knight to both guard one of the threat squares and open the h8-bishop's guard of the other threat squares: 1 Sxb3? (threats Qd4, Sxc5) Sfd7!; 1 Sb5? (threats Qd4, Sxc3, Sd6) Se8!; 1 Sf3? (threats Qd4, Sg5) Sh7!; 1 Se2? (threats Qd4, Sxc3, Sg3) Sh5!. White solves this problem by playing 1 Bc6! for the full-length threat 2 Qh1+ Kd3 3 Bb5. Black can defend by moving the queen to guard either b5 or h1, but each of these queen moves obstructs the f6-knight and allows one of the tries to work:
1 ... Qd7 2 Sxb3 (threats Qd4, Sxc5) Sxb3 3 Qc2; 2 ... Sd3 3 Qh1 (2 ... Sd7?) 1 ... Qe8 2 Sb5 (threats Qd4, Sxc3, Sd6) (2 ... Se8?) 1 ... Qh7 2 Sxf3 (threats Qd4, Sg5) (2 ... Sh7?) 1 ... Qh5 2 Se2 (threats Qd4, Sxc3, Sg3) (2 ... Sh5?)
We have two by-play variations, 1 ... g3 2 Qf3+ Kd3 3 Bb5 and 1...cxb2 2.Qb1+ Sd3 3.Qh1.
An interesting problem, and a very rewarding solve.
Dafydd Johnston: Another splendid three-mover. White needs a threat on the white squares to force the black queen to take away squares from the f6 knight. Then mate is achieved by dual threats on the black squares. Very nice coordination.
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