83.8M
positions
16.0M
practically solved
308.17T
engine nodes
2.3M
analyses
23
in queue
2
active workers
14
active cores
14.6M
nodes / sec
3.9
positions / min
85
proof number
4,538
disproof number
Root conquest: 0/20 first moves solved · 19.1% of tree positions solved · last 24h: 111,055 closures, 2.00T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 71 over 217 open obligations, of which 41 (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 1.6m (median of 18) · measured at 2026-10-14 19:00 UTC
Closures by source, last 24h (111055 of 111055 labelled): USER 99.6% (110648) · FILL 0.2% (240) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (167) · last 7d (1120709 of 1120709): USER 97.0% (1087421) · FILL 0.3% (3309) · AUTO 2.6% (29472) · SOLVE 0.0% (0) · NONE 0.0% (507). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 d5 2. Nc3 h6 … 14. h3 g4 15. Be8 d3 16. f4 (User) · 512.0M nodes · randomchampgamer-2026PC-atomicdb
- 1. Nf3 f6 2. e4 e6 … 14. b5 f5 15. g3 h5 16. a5 (User) · 512.0M 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 | 1134 | 2 | |
| g1h3 | unsolved | 703 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 395 | 2 | |
| b1c3 | unsolved | 127 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| b2b4 | unsolved | -65 | 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 | randomchampgamer 34.2% of the fleet | 684.40B | 2,852 |
| 2 | BManBJ 25.5% of the fleet | 508.99B | 2,818 |
| 3 | MoNiKaMaDnEsS 20.8% of the fleet | 415.09B | 2,360 |
| 4 | RickEdinson 19.6% of the fleet | 391.02B | 2,058 |
4 accounts · 2.00T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 29.3% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 16.2% of the fleet | 49.94T | 344,541 |
| 3 | tenzink 13.9% of the fleet | 42.83T | 349,427 |
| 4 | auranvesdranor 10.2% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 6.2% of the fleet | 19.22T | 135,458 |
| 6 | Torom 5.1% of the fleet | 15.70T | 113,354 |
| 7 | RickEdinson 4.3% of the fleet | 13.22T | 86,471 |
| 8 | JackIV 3.3% of the fleet | 10.06T | 67,859 |
| 9 | MoNiKaMaDnEsS 2.5% of the fleet | 7.71T | 51,450 |
| 10 | gannet 2.3% of the fleet | 7.24T | 46,848 |
and 25 more.
35 accounts · 308.20T 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
- Oct 14 19:41 Solved: BLACK_WIN via MATE_PVview
1. Nf3 f6 2. e4 e6 … 14. c3 d5 15. Rac1 b4 16. a3
1. Nf3 f6 2. e4 e6 3. Na3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. O-O Bd6 7. Ng5 Qa5 8. Bxc6 fxg5 9. Qh5 g6 10. Qe5 Qxe5 11. d4 b5 12. Bh6 Nxh6 13. g3 Ba6 14. c3 d5 15. Rac1 b4 16. a3 - Oct 14 19:39 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. e4 c6 … Nc6 8. c3 Qa5 9. Ng5 Bxg4
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Qa4 16. Bxa4 Kf8 17. Qe6 Bg5
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 Rf5 15. dxe5 Qa4 16. Bxa4 Kf8 17. Qe6 Bg5 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 15. dxe5 Qa4 16. Bxa4 Kf8 17. Qe6
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 Rf5 15. dxe5 Qa4 16. Bxa4 Kf8 17. Qe6 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Rf5 15. dxe5 Qa4 16. Bxa4 Kf8
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 Rf5 15. dxe5 Qa4 16. Bxa4 Kf8 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 14. Kd1 Rf5 15. dxe5 Qa4 16. Bxa4
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 Rf5 15. dxe5 Qa4 16. Bxa4 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … Rf8 14. Kd1 Rf5 15. dxe5 Qa4
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 Rf5 15. dxe5 Qa4 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 13. exf5 Rf8 14. Kd1 Rf5 15. dxe5
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 Rf5 15. dxe5 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … f5 13. exf5 Rf8 14. Kd1 Rf5
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 Rf5 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 12. Qh3 f5 13. exf5 Rf8 14. Kd1
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 14. Kd1 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … g6 12. Qh3 f5 13. exf5 Rf8
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5 Rf8 - Oct 14 19:39 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. e4 c6 … 11. Qh5 g6 12. Qh3 f5 13. exf5
1. Nf3 f6 2. e4 c6 3. Nc3 e5 4. g4 Nh6 5. Nb5 cxb5 6. d4 d6 7. Bb5 Nc6 8. c3 Qa5 9. Ng5 Bxg4 10. Bxh6 Be7 11. Qh5 g6 12. Qh3 f5 13. exf5