Real puzzles from rated games · median rating 1139 · solved 10,372,295 times
Opening: Caro–Kann Defence
These mate in 2 puzzles were set in games that began as the Caro–Kann Defence: 4,969 puzzles, median rating 1139, solved 10,372,295 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 the solutions are built.
How the solutions work · counted by a rules engine
What a typical mate in 2 solution looks like
Sample: 2,000 mate in 2 puzzles from Caro–Kann Defence games (40.2% of all 4,969).
100% need 2 solver moves. Median rating: 1137 for the shortest solutions, 1137 for the longest.
55.4% open with a queen move. The first move captures in 38.9% and gives check in 100%; 100% end in checkmate, 27.7% involve a sacrifice, 65.8% have White to move.
38.9%first move captures
100%first move gives check
100%end in checkmate
27.7%involve a sacrifice
How many moves does the solver need?
2 solver moves
100% · median rating 1137
Which piece plays the key move?
Key move by a queen
55.4%
Key move by a knight
18.9%
Key move by a bishop
14.3%
Key move by a rook
10%
Key move by a pawn
1.4%
What does the solver win?
Most valuable capture: pawn
35.7%
Captures nothing along the line
28.3%
Most valuable capture: knight
14%
Most valuable capture: rook
11.2%
Most valuable capture: bishop
6.1%
Most valuable capture: queen
4.6%
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)
52.4%
Up to 2 pawns’ worth
28.8%
3–4 points (about a minor piece)
9.4%
5–8 points (a rook or more)
6.5%
9 or more points (a queen’s worth)
2.9%
How much is left on the board?
28 or more pieces on the board
16%
21–27 pieces
78.9%
13–20 pieces
5.1%
12 pieces or fewer
0%
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: h7 (14.4%), f6 (12.2%), f7 (9.2%), e6 (7.7%), d8 (6%).
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6
4.7
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g
h
Counted from the same 2,000-puzzle sample. Squares under 1% are left blank.
Study positions
The most-solved mate in 2 puzzles, from each difficulty level. Play each one on the board, then open the answer for the full line.
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Black to move · rating 1021 · solved 1,861 times
· Mate in 2. It ends in checkmate on f2 with the queen.Reveal line
Opponent's last move: Nb3
Solution: Qh4+ → Kf1 → Qf2#
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White to move · rating 1082 · solved 1,644 times
· Mate in 2. It ends in checkmate on c8 with the rook. The solver captures a knight.Reveal line
Opponent's last move: Rd8
Solution: Bxd7+ → Rxd7 → Rc8#
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White to move · rating 1096 · solved 2,432 times
· Mate in 2. It ends in checkmate on h6 with the queen.Reveal line
Opponent's last move: g6
Solution: Nf6+ → Kf8 → Qh6#
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Black to move · rating 1285 · solved 3,329 times
· Mate in 2. It ends in checkmate on h3 with the queen. The solver captures 2 pieces (pawn, pawn).Reveal line
Opponent's last move: g3
Solution: Qxg3+ → Kh1 → Qxh3#
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White to move · rating 1340 · solved 1,965 times
· Mate in 2. It ends in checkmate on c8 with the queen. It gives up the knight (Nd6+) on the way. The solver captures a rook.Reveal line
Opponent's last move: cxd4
Solution: Nd6+ → Bxd6 → Qxc8#
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White to move · rating 1418 · solved 2,467 times
· Mate in 2. It ends in checkmate on a6 with the bishop. It gives up the rook (Rxc6+) on the way. The solver captures a pawn.Reveal line
Opponent's last move: Bg6
Solution: Rxc6+ → bxc6 → Ba6#
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White to move · rating 1443 · solved 2,952 times
· Mate in 2. It ends in checkmate on h7 with the queen.Reveal line
Opponent's last move: Nxg7
Solution: Rh6+ → Kg8 → Qh7#
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White to move · rating 1725 · solved 1,365 times
· Mate in 2. It ends in checkmate on a6 with the bishop. It gives up the queen (Qxc6+) on the way. The solver captures a pawn.Reveal line
Opponent's last move: Qd4
Solution: Qxc6+ → bxc6 → Ba6#
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White to move · rating 1786 · solved 1,575 times
· Mate in 2. It ends in checkmate on a6 with the bishop. It gives up the queen (Qxc6+) on the way. The solver captures a pawn.Reveal line
Opponent's last move: Qxc3
Solution: Qxc6+ → bxc6 → Ba6#
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White to move · rating 1960 · solved 1,556 times
· Mate in 2. It ends in checkmate on a6 with the bishop. It gives up the queen (Qxc6+) on the way. The solver captures a pawn.Reveal line
Opponent's last move: Qg4
Solution: Qxc6+ → bxc6 → Ba6#
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White to move · rating 2005 · solved 541 times
· Mate in 2. It ends in checkmate on d8 with the queen. The solver captures a pawn.Reveal line
Opponent's last move: Ne5
Solution: Nxb7+ → Ke8 → Qd8#
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Black to move · rating 2383 · solved 481 times
· Mate in 2. It ends in checkmate on f3 with the knight.Reveal line
Opponent's last move: Bxf8
Solution: Nh4+ → Ke1 → Nf3#
Positions and move sequences come from real rated games (CC0 data). Engine evaluations, where shown, are stored evaluations of the position (CC0).