73.6M
positions
13.7M
practically solved
263.47T
engine nodes
2.0M
analyses
5,127
in queue
8
active workers
48
active cores
15.0M
nodes / sec
17.2
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 222,897 closures, 3.62T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 208 open obligations, of which 39 (18.8%) 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 35s (median of 24) · measured at 2026-10-03 11:00 UTC
Closures by source, last 24h (222897 of 222897 labelled): USER 99.5% (221879) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.5% (1018) · last 7d (2433749 of 2433749): USER 98.6% (2400444) · FILL 0.3% (7655) · AUTO 0.9% (21287) · SOLVE 0.0% (0) · NONE 0.2% (4363). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. d4 d5 … 14. g4 f5 15. e5 Nd1 16. b4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Bb1 25. Be7 g5 26. f3 Ba2 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. d4 Na6 … b5 27. h5 a5 28. h6 g6 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. d4 Na6 … 26. f5 b5 27. h5 a5 28. h6 (User) · 128.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. d4 d5 … f5 15. e5 Nd1 16. b4 Rg8 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
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 | 1101 | 2 | |
| g1h3 | unsolved | 816 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 440 | 2 | |
| e2e4 | unsolved | 418 | 2 | |
| b1c3 | unsolved | 114 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 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 | 2 | |
| a2a4 | unsolved | -514 | 2 | |
| g2g4 | unsolved | -604 | 2 | |
| 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 | BManBJ 37.9% of the fleet | 1.37T | 10,185 |
| 2 | tenzink 18.8% of the fleet | 683.00B | 5,011 |
| 3 | randomchampgamer 18.5% of the fleet | 669.30B | 5,206 |
| 4 | RickEdinson 12.9% of the fleet | 468.52B | 3,425 |
| 5 | auranvesdranor 10.4% of the fleet | 376.56B | 2,867 |
| 6 | MoNiKaMaDnEsS 1.1% of the fleet | 41.03B | 322 |
| 7 | quasa 0.2% of the fleet | 7.94B | 62 |
| 8 | soothdest 0.2% of the fleet | 5.48B | 51 |
8 accounts · 3.62T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 34.3% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 39.78T | 329,102 |
| 3 | BManBJ 13.2% of the fleet | 34.75T | 245,030 |
| 4 | auranvesdranor 11.9% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 4.8% of the fleet | 12.60T | 93,884 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.1% of the fleet | 8.23T | 55,374 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.21T | 34,838 |
| 10 | NeoArcturus 1.6% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 263.56T 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 · 16 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 · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 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 21 proposals · see every proposal
Milestones
- Oct 03 11:43 LANE_CAP_HIT
- Oct 03 11:43 LANE_CAP_HIT
- Oct 03 11:43 LANE_CAP_HIT
- Oct 03 11:43 LANE_CAP_HIT
- Oct 03 11:43 LANE_CAP_HIT
- Oct 03 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf8 20. Qe5 Rf6 21. d8=Q Rf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 a5 13. e5 Nc7 14. Qe2 e6 15. exd6 Rd8 16. d5 f4 17. d6 Rd7 18. Qe4 Rf7 19. d7 Rf8 20. Qe5 Rf6 21. d8=Q Rf8 - Oct 03 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 19. d7 Rf8 20. Qe5 Rf6 21. d8=Q
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 a5 13. e5 Nc7 14. Qe2 e6 15. exd6 Rd8 16. d5 f4 17. d6 Rd7 18. Qe4 Rf7 19. d7 Rf8 20. Qe5 Rf6 21. d8=Q - Oct 03 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rf7 19. d7 Rf8 20. Qe5 Rf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 a5 13. e5 Nc7 14. Qe2 e6 15. exd6 Rd8 16. d5 f4 17. d6 Rd7 18. Qe4 Rf7 19. d7 Rf8 20. Qe5 Rf6 - Oct 03 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 18. Qe4 Rf7 19. d7 Rf8 20. Qe5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 a5 13. e5 Nc7 14. Qe2 e6 15. exd6 Rd8 16. d5 f4 17. d6 Rd7 18. Qe4 Rf7 19. d7 Rf8 20. Qe5 - Oct 03 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd7 18. Qe4 Rf7 19. d7 Rf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 a5 13. e5 Nc7 14. Qe2 e6 15. exd6 Rd8 16. d5 f4 17. d6 Rd7 18. Qe4 Rf7 19. d7 Rf8 - Oct 03 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 17. d6 Rd7 18. Qe4 Rf7 19. d7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 a5 13. e5 Nc7 14. Qe2 e6 15. exd6 Rd8 16. d5 f4 17. d6 Rd7 18. Qe4 Rf7 19. d7 - Oct 03 11:43 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … f4 17. d6 Rd7 18. Qe4 Rf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 h5 5. d4 Rh7 6. Bg5 Nf6 7. Nd8 g6 8. Ne6 Bh6 9. Nxc7 Kf8 10. Bxh6 Ne8 11. Nc3 Kg8 12. Bb5 a5 13. e5 Nc7 14. Qe2 e6 15. exd6 Rd8 16. d5 f4 17. d6 Rd7 18. Qe4 Rf7