I had a hard time with this one, though I shouldn't have. How will you do?
1N1K4/2R5/3ppP2/1P1kpb2/2n4P/2P1PPB1/2npp1NQ/4b3 w - - 0 1
At first I got a lot of mates in 5. Then I guessed how to mate in 4.
1.Qh1 d1=Q2.e4+ Bxe43.Ne3+ N2xe34.fxe4#
Ra6, d1 (Queen promotion)
Na6, d1 (Queen promotion); Rc6, Bxg3; Qxg3, Nxe3; Nc7+mate
1.Qh1 N2Xe32.Na6 Nc23.Rc6 e44.Nc7#
1.Qh1 N4xe32.Nd7 Nc43.f7 e44.Nf6#
1.Qh1 Be42.Nf4+ exf43.fxe4+ Ke54.Nd7#
Will White MATE IN 4 when 1. Ra6, e4?
Will White MATE IN 4 when 1. Qh1, e4?
After 1.Qh1 e4 then 2.Nf4 Ke5 3.Nd7#, so not in four, but in three which satisfies the puzzle's stipulation which is mate in no more than 4.
The last line is the key one for 1.f7. 1.f7 Bg3 2.Nd7 e4, and I could never find a mate in 4, but only mate in 5.
There are some really nice zugzwang motifs inside this chess problem in both the main line and the variations.
White has a strong attack but is there a win?
2018 Summer Chess Classic is a 10-player round-robin tournament taking place from 15-23 May at STL Chess Club
You should be able to spot the tactic motif in 5-10 seconds.
This is from an actual chess game which took place at Kolkata International Chess Open
This is from a real chess game of chess master Kucuksari
Precise tactic execution is required
Review of the new book by Russian Correspondence GM Nikolay Kalinichenko
This is a very famous chess position from 1869
what if you do 1. Qb1?? and your opponent does ..c1=Q!! then white is screwed.
For me, this is Rambo Attack Tactic [ 1) R5e8+!! Kh7 2) Qxd2! R8xd2 3) Rexa8 ~ Black resigned 1-0 ]