74.3M
positions
13.8M
practically solved
266.29T
engine nodes
2.1M
analyses
1,169
in queue
8
active workers
48
active cores
0
nodes / sec
22.9
positions / min
82
proof number
3,797
disproof number
Root conquest: 0/20 first moves solved · 18.6% of tree positions solved · last 24h: 108,650 closures, 3.59T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 68 over 212 open obligations, of which 40 (18.9%) 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 17.0m (median of 21) · measured at 2026-10-04 06:00 UTC
Closures by source, last 24h (108650 of 108650 labelled): USER 99.1% (107631) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.9% (1019) · last 7d (2205224 of 2205224): USER 99.8% (2200833) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4391). 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. Ne5 fxe5 … 31. a3 Ke7 32. h6 Nd8 33. f5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … 30. g5 Kd8 31. f6 Kc7 32. f7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Ne5 fxe5 … 30. g5 Kd8 31. f6 Nf8 32. d5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … Kd7 32. h4 a6 33. c5 bxc5 (User) · 128.0M nodes · RickEdinson-MSI-atomicdb
- 1. Nf3 f6 2. Ne5 fxe5 … gxf5 29. h4 Nc1 30. g4 Be8 (User) · 128.0M nodes · tenzink-compute-vm-4-8-20-ssd-1785501211339-chess-atomicdb#0
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 | 724 | 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 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -73 | 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 46.9% of the fleet | 1.68T | 12,573 |
| 2 | randomchampgamer 19.9% of the fleet | 714.21B | 5,106 |
| 3 | tenzink 19.4% of the fleet | 694.31B | 4,809 |
| 4 | RickEdinson 13.8% of the fleet | 494.27B | 3,200 |
4 accounts · 3.59T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 33.9% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.1% of the fleet | 40.33T | 332,923 |
| 3 | BManBJ 13.6% of the fleet | 36.12T | 255,256 |
| 4 | auranvesdranor 11.8% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 4.9% of the fleet | 13.17T | 97,977 |
| 6 | JackIV 3.8% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.2% of the fleet | 8.62T | 57,863 |
| 8 | gannet 2.7% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.0% of the fleet | 5.21T | 34,838 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 266.45T 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 · 17 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 04 07:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Ke8 32. f7 Ke7 33. f8=Q Ke6
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. g4 Bd3 22. Bg7 Nb8 23. Be5 Kd8 24. f4 g5 25. Bh8 Bf1 26. f5 Ke7 27. Bf6 Ke8 28. a4 Bh3 29. Bxg5 Nd7 30. f6 Kf7 31. g5 Ke8 32. f7 Ke7 33. f8=Q Ke6 - Oct 04 07:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 31. g5 Ke8 32. f7 Ke7 33. f8=Q
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. g4 Bd3 22. Bg7 Nb8 23. Be5 Kd8 24. f4 g5 25. Bh8 Bf1 26. f5 Ke7 27. Bf6 Ke8 28. a4 Bh3 29. Bxg5 Nd7 30. f6 Kf7 31. g5 Ke8 32. f7 Ke7 33. f8=Q - Oct 04 07:04 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … Kf7 31. g5 Ke8 32. f7 Ke7
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. g4 Bd3 22. Bg7 Nb8 23. Be5 Kd8 24. f4 g5 25. Bh8 Bf1 26. f5 Ke7 27. Bf6 Ke8 28. a4 Bh3 29. Bxg5 Nd7 30. f6 Kf7 31. g5 Ke8 32. f7 Ke7 - Oct 04 07:03 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 33. d6 Nc4 34. Kf2 Ne3 35. b5
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. d5 Ne5 22. Bf4 Nf7 23. a4 a6 24. Bxd6 b6 25. a5 Ne5 26. f4 Nd3 27. Kd1 Nf2 28. Ke1 Kb8 29. c5 bxc5 30. h4 Nd3 31. Kd1 Nb2 32. Ke2 Bd7 33. d6 Nc4 34. Kf2 Ne3 35. b5 - Oct 04 07:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd6 17. exd5 Kg8 18. Qf8 Kh7
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 Rh8 10. Bb5 Kf8 11. Be8 Rg8 12. Qe2 Rd8 13. Qc4 e6 14. Bf7 Rg7 15. Bxe6 d5 16. Qb4 Rd6 17. exd5 Kg8 18. Qf8 Kh7 - Oct 04 07:02 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 33. d6 Kd7 34. b6 Bb7 35. h5
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. d5 Ne5 22. Bf4 Nf7 23. a4 a6 24. Bxd6 b6 25. a5 Ne5 26. f4 Nd3 27. Kd1 Nf2 28. Ke1 Kb8 29. c5 bxc5 30. h4 Bc8 31. b5 Nd3 32. Kf1 Kc7 33. d6 Kd7 34. b6 Bb7 35. h5 - Oct 04 07:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 16. Qb4 Rd6 17. exd5 Kg8 18. Qf8
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 Rh8 10. Bb5 Kf8 11. Be8 Rg8 12. Qe2 Rd8 13. Qc4 e6 14. Bf7 Rg7 15. Bxe6 d5 16. Qb4 Rd6 17. exd5 Kg8 18. Qf8 - Oct 04 07:02 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. Ne5 fxe5 … 33. d6 Kd7 34. b6 Bb7 35. f5
1. Nf3 f6 2. Ne5 fxe5 3. e4 c6 4. Na3 d6 5. Nb5 cxb5 6. d4 Nc6 7. Bc4 e6 8. b4 Qa5 9. Bg5 Nf6 10. Bxe6 Qf5 11. Qf3 g6 12. Bh6 Be7 13. exf5 Bh4 14. O-O-O Bf5 15. c4 O-O-O 16. Qg3 Bxg3 17. Rde1 Rde8 18. Re3 Rxe3 19. Re1 Re8 20. Re7 Rxe7 21. d5 Ne5 22. Bf4 Nf7 23. a4 a6 24. Bxd6 b6 25. a5 Ne5 26. f4 Nd3 27. Kd1 Nf2 28. Ke1 Kb8 29. c5 bxc5 30. h4 Bc8 31. b5 Nd3 32. Kf1 Kc7 33. d6 Kd7 34. b6 Bb7 35. f5 - Oct 04 07:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … d5 16. Qb4 Rd6 17. exd5 Kg8
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 Rh8 10. Bb5 Kf8 11. Be8 Rg8 12. Qe2 Rd8 13. Qc4 e6 14. Bf7 Rg7 15. Bxe6 d5 16. Qb4 Rd6 17. exd5 Kg8 - Oct 04 07:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rg8 12. Qe2 Rd8 13. Qc4 e6
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 Rh8 10. Bb5 Kf8 11. Be8 Rg8 12. Qe2 Rd8 13. Qc4 e6 - Oct 04 07:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 11. Be8 Rg8 12. Qe2 Rd8 13. Qc4
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 Rh8 10. Bb5 Kf8 11. Be8 Rg8 12. Qe2 Rd8 13. Qc4 - Oct 04 07:02 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf8 11. Be8 Rg8 12. Qe2 Rd8
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 Rh8 10. Bb5 Kf8 11. Be8 Rg8 12. Qe2 Rd8