67.5M
positions
12.1M
practically solved
243.28T
engine nodes
1.9M
analyses
8,200
in queue
18
active workers
128
active cores
23.3M
nodes / sec
31.0
positions / min
57
proof number
3,815
disproof number
Root conquest: 0/20 first moves solved · 18.0% of tree positions solved · last 24h: 325,116 closures, 6.51T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 81 over 199 open obligations, of which 32 (16.1%) 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 3.1m (median of 132) · measured at 2026-09-29 19:00 UTC
Closures by source, last 24h (325007 of 325051 labelled): USER 99.9% (324624) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (383) · last 7d (1839507 of 1839570): USER 97.6% (1796108) · FILL 0.5% (8795) · AUTO 1.7% (32065) · SOLVE 0.0% (0) · NONE 0.1% (2539). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f6 2. Nc3 h6 … e5 13. Bb2 Kh7 14. h4 Kh6 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. e3 d5 … Kg7 12. Bxe7 a5 13. c4 Rac8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 g6 … b6 10. O-O f5 11. Kh1 Kg8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. e4 h6 … Nc6 13. Nb5 Nb4 14. Rae1 O-O (User) · 512.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nh3 e6 2. e3 Nc6 … 7. Nxe6 Bb4 8. Nc3 f5 9. O-O (User) · 128.0M nodes · cloudlet
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 | 1050 | 2 | |
| g1h3 | unsolved | 760 | 2 | |
| e2e3 | unsolved | 439 | 3 | |
| d2d4 | unsolved | 437 | 2 | |
| e2e4 | unsolved | 363 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -299 | 3 | |
| h2h4 | unsolved | -497 | 2 | |
| a2a4 | unsolved | -510 | 2 | |
| g2g4 | unsolved | -600 | 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 | gannet 35.1% of the fleet | 2.28T | 10,549 |
| 2 | BManBJ 21.6% of the fleet | 1.41T | 10,615 |
| 3 | auranvesdranor 15.6% of the fleet | 1.02T | 7,756 |
| 4 | randomchampgamer 8.9% of the fleet | 583.05B | 4,716 |
| 5 | tenzink 8.5% of the fleet | 550.90B | 3,825 |
| 6 | RickEdinson 5.1% of the fleet | 330.49B | 2,210 |
| 7 | MoNiKaMaDnEsS 4.3% of the fleet | 278.53B | 2,074 |
| 8 | rhaxier 0.9% of the fleet | 59.29B | 406 |
| 9 | soothdest <0.1% of the fleet | 2.19B | 35 |
9 accounts · 6.51T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.1% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.4% of the fleet | 37.43T | 311,934 |
| 3 | BManBJ 12.1% of the fleet | 29.41T | 203,805 |
| 4 | auranvesdranor 11.6% of the fleet | 28.23T | 203,802 |
| 5 | randomchampgamer 4.2% of the fleet | 10.27T | 75,496 |
| 6 | JackIV 4.1% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 2.8% of the fleet | 6.83T | 45,280 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.42T | 28,639 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 25 more.
35 accounts · 243.39T 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
- 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Sep 29 19:36 LANE_CAP_HIT
- Sep 29 19:36 SEEDEDview
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… - Sep 29 19:36 SEEDEDview
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… - Sep 29 19:36 LANE_CAP_HIT
- Sep 29 19:36 LANE_CAP_HIT
- Sep 29 19:36 LANE_CAP_HIT
- Sep 29 19:36 SEEDEDview
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… - Sep 29 19:36 SEEDEDview
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… - Sep 29 19:36 LANE_CAP_HIT
- Sep 29 19:36 LANE_CAP_HIT
- Sep 29 19:36 LANE_CAP_HIT
- Sep 29 19:36 LANE_CAP_HIT