Real puzzles from rated games · median rating 1428 · solved 43,804,970 times
Difficulty 1200–1599
These are mate in 4 puzzles rated 1200–1599, the Developing level on this site. They come from real rated games: 8,786 puzzles, median rating 1428, solved 43,804,970 times. The twelve below are among the most-solved of them; try each on the board, then read the numbers further down to see how solutions at this level are built.
How the solutions work · counted by a rules engine
What a typical mate in 4 solution looks like
Sample: 2,000 mate in 4 puzzles at developing level (22.8% of all 8,786).
100% need 4 solver moves. Median rating: 1429 for the shortest solutions, 1429 for the longest.
48.7% open with a queen move. The first move captures in 47.4% and gives check in 97.2%; 100% end in checkmate, 65.4% involve a sacrifice, 51.8% have White to move.
47.4%first move captures
97.2%first move gives check
100%end in checkmate
65.4%involve a sacrifice
How many moves does the solver need?
4 solver moves
100% · median rating 1429
Which piece plays the key move?
Key move by a queen
48.7%
Key move by a rook
28.2%
Key move by a knight
10.4%
Key move by a bishop
7%
Key move by a pawn
4.6%
Key move by the king
1%
What does the solver win?
Most valuable capture: rook
35.8%
Most valuable capture: queen
26.4%
Captures nothing along the line
11.2%
Most valuable capture: bishop
10.9%
Most valuable capture: pawn
10.7%
Most valuable capture: knight
5%
Material balance along the whole line, counting every capture by both sides (pawn 1, minor piece 3, rook 5, queen 9):
No material gained (mating or positional)
33.7%
Up to 2 pawns’ worth
20.6%
3–4 points (about a minor piece)
13.4%
5–8 points (a rook or more)
25.4%
9 or more points (a queen’s worth)
7%
How much is left on the board?
28 or more pieces on the board
1%
21–27 pieces
23.4%
13–20 pieces
71.3%
12 pieces or fewer
4.4%
How it is counted: every puzzle in the sample is replayed move by move with a chess rules engine. A sacrifice means a piece that is captured on the very next ply and was worth more than what it captured itself (pawn 1, minor piece 3, rook 5, queen 9). Sample of 2,000 puzzles. Percentages are shares of the sample.
Where it happens
Where the key move lands
Where the solver’s first move ends, drawn from their own side (rank 1 is their back rank). Busiest squares: f7 (23.5%), h7 (9.5%), e7 (6.2%), h8 (6%), g7 (5.5%).
2.1
1.5
2.1
3.1
3.4
3.2
1.5
6
8
1.7
1.1
6.2
23.5
5.5
9.5
7
2.3
3.1
4.3
2.7
6
1.1
1.1
1.3
2.9
5
1.1
4
3
2
1
a
b
c
d
e
f
g
h
Counted from the same 2,000-puzzle sample. Squares under 1% are left blank.
Study positions
The most-solved mate in 4 puzzles, from each difficulty level. Play each one on the board, then open the answer for the full line.
♜
♚
♟
♟
♟
♟
♜
♟
♛
♙
♙
♕
♙
♖
♙
♙
♖
♔
White to move · rating 1221 · solved 2,924 times
· Mate in 4. It ends in checkmate on f8 with the rook. It gives up the queen (Qxf7+) on the way. The solver captures 3 pieces (pawn, queen, rook).Reveal line
Black to move · rating 1273 · solved 2,747 times
· Mate in 4. It ends in checkmate on f1 with the rook. It gives up the queen (Qxf2+) on the way. The solver captures 3 pieces (pawn, queen, rook).Reveal line
White to move · rating 1353 · solved 2,950 times
· Mate in 4. It ends in checkmate on e8 with the rook. It gives up the queen (Qxf6+) on the way. The solver captures 3 pieces (rook, rook, knight).Reveal line
Black to move · rating 1355 · solved 2,816 times
· Mate in 4. It ends in checkmate on f1 with the rook. The solver captures 3 pieces (queen, rook, rook).Reveal line
Black to move · rating 1450 · solved 3,323 times
· Mate in 4. It ends in checkmate on b1 with the queen. The solver captures 2 pieces (rook, pawn).Reveal line
White to move · rating 1455 · solved 3,293 times
· Mate in 4. It ends in checkmate on g7 with the queen. The solver captures 3 pieces (pawn, pawn, pawn).Reveal line
White to move · rating 1493 · solved 4,937 times
· Mate in 4. It ends in checkmate on f8 with the rook. It gives up the queen (Qxc8+) on the way. The solver captures 2 pieces (rook, bishop).Reveal line
White to move · rating 1537 · solved 3,878 times
· Mate in 4. It ends in checkmate on f8 with the rook. It gives up the queen (Qxf7+) on the way. The solver captures 3 pieces (pawn, rook, rook).Reveal line
White to move · rating 1541 · solved 2,827 times
· Mate in 4. It ends in checkmate on h4 with the rook. It gives up the rook (Rxh7+) on the way. The solver captures 3 pieces (pawn, pawn, queen).Reveal line