106.4M
positions
22.5M
practically solved
396.04T
engine nodes
2.9M
analyses
8,778
in queue
active workers
132
active cores
151.6M
nodes / sec
64.6
positions / min
120
proof number
4,002
disproof number
Root conquest: 0/20 first moves solved · 21.1% of tree positions solved · last 24h: 228,571 closures, 9.45T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 200 open obligations, of which 36 (18.0%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · positions a visitor asked for close in 3.2m (median of 87) · measured at 2026-11-02 09:00 UTC
Closures by source, last 24h (228568 of 228568 labelled): USER 98.1% (224297) · FILL 1.4% (3304) · AUTO 0.4% (890) · SOLVE 0.0% (0) · NONE 0.0% (77) · last 7d (1248067 of 1248067): USER 98.1% (1224596) · FILL 0.8% (10049) · AUTO 1.0% (12927) · SOLVE 0.0% (0) · NONE 0.0% (495). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. Nf3 d6 2. Ng5 f5 … a5 11. O-O Nb6 12. b4 e5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … a5 11. O-O Nb6 12. b4 d5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … a5 11. O-O Nb6 12. b4 h4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … a5 11. O-O Nb6 12. b4 f4 (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ng1 g6 … 6. Nc3 Bb4 7. Qxh7 Kf8 8. h4 (User) · 128.0M nodes · daybreak
Play to explore drag a piece or click two squares
Keyboard move list
First moves from the starting position
| move | state | eval | visits | |
|---|---|---|---|---|
| g1f3 | unsolved | 1144 | 2 | |
| g1h3 | unsolved | 748 | 2 | |
| d2d4 | unsolved | 443 | 2 | |
| e2e3 | unsolved | 437 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -59 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 3 | |
| h2h4 | unsolved | -500 | 3 | |
| a2a4 | unsolved | -514 | 2 | |
| g2g4 | unsolved | -604 | 3 | |
| c2c4 | unsolved | -700 | 3 |
Contributors by engine nodes
Every position in this tree was searched by somebody's machine. Ties share a place, and the share is measured against everything the whole fleet searched in that window.
Last 24 hours
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | gannet 38.5% of the fleet | 3.64T | 26,140 |
| 2 | Torom 35.2% of the fleet | 3.33T | 24,829 |
| 3 | BManBJ 17.5% of the fleet | 1.66T | 6,939 |
| 4 | RickEdinson 4.7% of the fleet | 442.11B | 2,891 |
| 5 | MoNiKaMaDnEsS 3.6% of the fleet | 335.99B | 2,337 |
| 6 | soothdest 0.5% of the fleet | 45.48B | 271 |
6 accounts · 9.45T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 22.8% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.4% of the fleet | 80.87T | 540,285 |
| 3 | Torom 13.6% of the fleet | 53.88T | 388,351 |
| 4 | tenzink 10.8% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 7.9% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.84T | 143,277 |
| 7 | randomchampgamer 5.0% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.2% of the fleet | 12.88T | 89,077 |
| 9 | gannet 3.0% of the fleet | 11.77T | 79,603 |
| 10 | JackIV 2.5% of the fleet | 10.06T | 67,859 |
and 25 more.
35 accounts · 396.42T nodes searched by the whole fleet.
Proposed campaigns
Anyone can put a line up and vote for it. The site owner decides which one the solver actually runs.
- Should be easiest proof for nf3 e51. Nf3 e5 2. e4proposed by quasa · 18 votes
- Pls nh4 is more solvable than c31. Nf3 f6 2. e4 e6 3. Nc3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. d4 g6 7. Nh4proposed by 67king · 6 votes
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- Let's solve Qc8 in 2N Nh6 mainline and/or use it as a benchmark1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Bg4 11. Bh3 Qc8 12. Bh6proposed by soothdest · 3 votes
Showing the 6 most voted of 23 proposals · see every proposal
Milestones
- Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 8. Nxa7 Nf2 9. Qa4 Ne4 10. g3
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 h5 8. Nxa7 Nf2 9. Qa4 Ne4 10. g3 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 8. Nxa7 Nf2 9. Qa4 Ne4 10. b3
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 h5 8. Nxa7 Nf2 9. Qa4 Ne4 10. b3 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 Nh6 … 8. Nxa7 Nf2 9. Qa4 Ne4 10. a3
1. Nf3 f6 2. Nd4 Nh6 3. f4 Ng4 4. e3 e6 5. Nb5 Bb4 6. c3 c6 7. h3 h5 8. Nxa7 Nf2 9. Qa4 Ne4 10. a3 - Nov 02 09:50 Solved: BLACK_WIN via MINIMAXview
1. Nf3 f6 2. Ne5 fxe5 … 8. f4 Rf6 9. e3 h6 10. Qxd7
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 15. Ke1 Re2 16. Kf1 Re1 17. Kf2
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2 14. g3 Rf2 15. Ke1 Re2 16. Kf1 Re1 17. Kf2 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Rf2 15. Ke1 Re2 16. Kf1 Re1
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2 14. g3 Rf2 15. Ke1 Re2 16. Kf1 Re1 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 14. g3 Rf2 15. Ke1 Re2 16. Kf1
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2 14. g3 Rf2 15. Ke1 Re2 16. Kf1 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Rd2 14. g3 Rf2 15. Ke1 Re2
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2 14. g3 Rf2 15. Ke1 Re2 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 13. Kf1 Rd2 14. g3 Rf2 15. Ke1
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2 14. g3 Rf2 15. Ke1 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … gxf6 13. Kf1 Rd2 14. g3 Rf2
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2 14. g3 Rf2 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 12. Bf6 gxf6 13. Kf1 Rd2 14. g3
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2 14. g3 - Nov 02 09:50 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Bxc3 12. Bf6 gxf6 13. Kf1 Rd2
1. Nf3 f6 2. Ne5 fxe5 3. Nc3 c6 4. d4 e6 5. Bg5 Nf6 6. d5 Bb4 7. dxe6 O-O 8. f4 Rf6 9. e3 h6 10. Qxd7 Rd6 11. Bc4 Bxc3 12. Bf6 gxf6 13. Kf1 Rd2