Real puzzles from rated games · median rating 1077 · solved 21,077,064 times
Difficulty 600–1199
These are defensive move puzzles rated 600–1199, the Foundation level on this site. They come from real rated games: 24,256 puzzles, median rating 1077, solved 21,077,064 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 defensive move solution looks like
Sample: 2,000 defensive move puzzles at foundation level (8.2% of all 24,256).
65.8% need 2 solver moves, 29.4% need 3 solver moves, 3.9% need 4 solver moves, 0.8% need 5 or more solver moves. Median rating: 1064 for the shortest solutions, 1164 for the longest.
37% open with the king move. The first move captures in 36.5% and gives check in 14.8%; 0.2% end in checkmate, 12.6% involve a sacrifice, 51.4% have White to move.
36.5%first move captures
14.8%first move gives check
0.2%end in checkmate
12.6%involve a sacrifice
How many moves does the solver need?
2 solver moves
65.8% · median rating 1064
3 solver moves
29.4% · median rating 1103
4 solver moves
3.9% · median rating 1111
5+ solver moves
0.8% · median rating 1164
Which piece plays the key move?
Key move by the king
37%
Key move by a pawn
21%
Key move by a rook
20.8%
Key move by a bishop
9.2%
Key move by a queen
6.4%
Key move by a knight
5.5%
What does the solver win?
Most valuable capture: rook
25.5%
Most valuable capture: queen
22.1%
Captures nothing along the line
21.2%
Most valuable capture: pawn
15.2%
Most valuable capture: bishop
9.4%
Most valuable capture: knight
6.6%
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)
38.6%
Up to 2 pawns’ worth
17.8%
3–4 points (about a minor piece)
22.6%
5–8 points (a rook or more)
17%
9 or more points (a queen’s worth)
4.1%
How much is left on the board?
28 or more pieces on the board
0.8%
21–27 pieces
8.2%
13–20 pieces
29.2%
12 pieces or fewer
61.8%
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: f4 (3.8%), f3 (3.7%), e3 (3.3%), e4 (3.1%), g3 (3.1%).
8
1.4
1.7
2.5
1.9
1.7
1.2
1
7
1.2
1.5
2.1
2.1
2.3
2.5
2.5
6
1
1.4
2.1
2.4
2.4
2.3
2.5
1.2
5
1.5
1.9
2.2
2.1
3.1
3.8
2.5
1.8
4
1.3
1.9
2.2
3.3
3.7
3.1
1.9
3
1.1
2.5
2
3
1.7
2.2
2
1.1
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 defensive move puzzles, from each difficulty level. Play each one on the board, then open the answer for the full line.
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White to move · rating 922 · solved 1,805 times
· 2 solver moves to find. It gives up the bishop (Bxe2) on the way. The solver captures a pawn.Reveal line
Opponent's last move: e2
Solution: Bxe2 → Nxe2 → a5
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White to move · rating 1064 · solved 8,490 times
· 3 solver moves to find. The solver captures a bishop.Reveal line
Opponent's last move: c5
Solution: Nb6+ → Kc6 → Nxa8 → Kb7 → Nb6
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Black to move · rating 1127 · solved 2,093 times
· 3 solver moves to find. The solver captures a pawn.Reveal line
Opponent's last move: c3
Solution: d4+ → cxd4+ → cxd4+ → Kd3 → Kd5
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Black to move · rating 1139 · solved 1,932 times
· 2 solver moves to find. It gives up the bishop (Be5) on the way. The solver captures a queen.Reveal line
Opponent's last move: Qc3+
Solution: Be5 → Qxe5+ → Qxe5
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White to move · rating 1147 · solved 2,339 times
· 2 solver moves to find. The solver captures a knight.Reveal line
Opponent's last move: h5
Solution: Rxb8 → Qb2+ → Kg3
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White to move · rating 1150 · solved 3,114 times
· 3 solver moves to find. The solver captures 2 pieces (queen, rook).Reveal line
Opponent's last move: Qe4+
Solution: Qxe4 → fxe4 → Bxd7 → a3 → Be6
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White to move · rating 1163 · solved 1,742 times
· 3 solver moves to find. The solver captures a bishop.Reveal line
Opponent's last move: a4
Solution: Ne7+ → Kd7 → Nxf5 → a3 → Kc1
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White to move · rating 1166 · solved 1,881 times
· 2 solver moves to find. The solver captures a rook.Reveal line
Opponent's last move: Ra5
Solution: Rxa5 → bxa5 → c4
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Black to move · rating 1166 · solved 1,821 times
· 2 solver moves to find. The solver captures a knight.Reveal line
Opponent's last move: Qxb4+
Solution: Be7 → Qa4 → exd4
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Black to move · rating 1173 · solved 1,837 times
· 3 solver moves to find. A quiet solution: no capture and no mate.Reveal line
Opponent's last move: Kxd4
Solution: c3 → Kd3 → Kb3 → Bd5+ → Kb2
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Black to move · rating 1180 · solved 2,224 times
· 3 solver moves to find. It gives up the knight (Ng5+) on the way. The solver captures a queen.Reveal line
Opponent's last move: Qxg7+
Solution: Kf4 → Qh6+ → Ng5+ → Qxg5+ → Kxg5
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Black to move · rating 1183 · solved 7,835 times
· 3 solver moves to find. The solver captures a pawn.Reveal line
Opponent's last move: Ke5
Solution: Kg5 → f4+ → Kg4 → Kf6 → Kxg3
Positions and move sequences come from real rated games (CC0 data). Engine evaluations, where shown, are stored evaluations of the position (CC0).