CCRL Challenger
Play against a huge library of chess engines in your browser
Computer Chess

Choose your opponent

This site allows you to play against 539 different chess engine opponents in your browser.

All engines are open-source engines taken from the CCRL (Computer Chess Rating List).

539 engine opponents
152 unique engines
0 games in progress
447 games played
63% engine win rate

Showing strongest versions of engines, sorted by release date.

Strongest versions · Sort by release date · Complete list · Complete list by date · Engines rated below 2000

LogoRankNameRatingRelease date
#75
1 games - 1W 0D 0L (100%)
3581 2026-09-23
#5
0 games - 0W 0D 0L (0%)
3764 2026-09-19
#8
2 games - 0W 2D 0L (0%)
3757 2026-09-10
#60
5 games - 4W 1D 0L (80%)
3649 2026-09-09
#211
2 games - 1W 1D 0L (50%)
3136 2026-09-08
#1
217 games - 154W 58D 5L (71%)
3793 2026-09-05
#246
0 games - 0W 0D 0L (0%)
3015 2026-08-28
#34
7 games - 7W 0D 0L (100%)
3701 2026-08-27
#6
3 games - 2W 0D 1L (67%)
3762 2026-08-22
#196
0 games - 0W 0D 0L (0%)
3203 2026-08-17
#141
7 games - 2W 3D 2L (29%)
3383 2026-08-09
#71
1 games - 1W 0D 0L (100%)
3597 2026-08-08
#198
1 games - 1W 0D 0L (100%)
3189 2026-08-08
#31
1 games - 1W 0D 0L (100%)
3705 2026-08-07
#155
0 games - 0W 0D 0L (0%)
3344 2026-08-02
#785
0 games - 0W 0D 0L (0%)
1449 2026-08-01
#65
5 games - 5W 0D 0L (100%)
3626 2026-07-29
#16
6 games - 6W 0D 0L (100%)
3744 2026-07-22
#49
0 games - 0W 0D 0L (0%)
3683 2026-07-17
#53
1 games - 0W 1D 0L (0%)
3671 2026-07-13
#95
1 games - 1W 0D 0L (100%)
3527 2026-07-12
#139
0 games - 0W 0D 0L (0%)
3392 2026-07-12
#179
1 games - 1W 0D 0L (100%)
3258 2026-07-09
#244
0 games - 0W 0D 0L (0%)
3020 2026-07-08
#159
0 games - 0W 0D 0L (0%)
3335 2026-07-07
#8
1 games - 1W 0D 0L (100%)
3757 2026-06-29
#277
2 games - 1W 0D 1L (50%)
2896 2026-06-29
#3
4 games - 3W 1D 0L (75%)
3774 2026-06-27
#20
1 games - 0W 1D 0L (0%)
3732 2026-06-27
#30
1 games - 1W 0D 0L (100%)
3712 2026-06-27
#211
0 games - 0W 0D 0L (0%)
3135 2026-06-27
#43
0 games - 0W 0D 0L (0%)
3693 2026-06-17
#16
0 games - 0W 0D 0L (0%)
3741 2026-06-10
#101
0 games - 0W 0D 0L (0%)
3509 2026-05-28
#21
3 games - 3W 0D 0L (100%)
3731 2026-05-26
#84
1 games - 1W 0D 0L (100%)
3549 2026-05-17
#128
3 games - 2W 0D 1L (67%)
3425 2026-05-11
#283
1 games - 0W 0D 1L (0%)
2863 2026-05-01
#818
0 games - 0W 0D 0L (0%)
1305 2026-04-23
#73
0 games - 0W 0D 0L (0%)
3588 2026-04-21
#524
1 games - 1W 0D 0L (100%)
2219 2026-04-20
#208
0 games - 0W 0D 0L (0%)
3141 2026-04-14
#294
1 games - 1W 0D 0L (100%)
2808 2026-04-10
#154
0 games - 0W 0D 0L (0%)
3345 2026-04-08
#180
0 games - 0W 0D 0L (0%)
3257 2026-04-04
#522
1 games - 1W 0D 0L (100%)
2233 2026-03-08
#109
1 games - 0W 0D 1L (0%)
3473 2026-03-06
#177
3 games - 2W 1D 0L (67%)
3274 2026-03-03
#5
23 games - 13W 7D 3L (57%)
3766 2026-03-01
#525
1 games - 1W 0D 0L (100%)
2218 2026-01-19
#105
3 games - 0W 0D 3L (0%)
3490 2026-01-06
#167
0 games - 0W 0D 0L (0%)
3306 2026-01-05
#180
0 games - 0W 0D 0L (0%)
3257 2025-12-21
#848
0 games - 0W 0D 0L (0%)
1115 2025-12-20
#110
2 games - 2W 0D 0L (100%)
3464 2025-12-10
#102
3 games - 0W 1D 2L (0%)
3506 2025-12-07
#272
3 games - 3W 0D 0L (100%)
2910 2025-11-02
#89
0 games - 0W 0D 0L (0%)
3539 2025-10-31
#24
0 games - 0W 0D 0L (0%)
3727 2025-09-14
#50
10 games - 7W 3D 0L (70%)
3675 2025-07-28
#521
0 games - 0W 0D 0L (0%)
2240 2025-06-22
#4
9 games - 7W 2D 0L (78%)
3771 2025-05-21
#82
0 games - 0W 0D 0L (0%)
3553 2025-05-05
#94
2 games - 2W 0D 0L (100%)
3528 2025-04-10
#133
1 games - 1W 0D 0L (100%)
3402 2025-04-01
#264
0 games - 0W 0D 0L (0%)
2948 2025-03-22
#10
0 games - 0W 0D 0L (0%)
3755 2025-03-03
#348
1 games - 1W 0D 0L (100%)
2640 2024-12-07
#668
0 games - 0W 0D 0L (0%)
1860 2024-11-21
#81
2 games - 1W 1D 0L (50%)
3567 2024-11-08
#127
0 games - 0W 0D 0L (0%)
3432 2024-11-05
#203
0 games - 0W 0D 0L (0%)
3176 2024-11-03
#30
1 games - 0W 1D 0L (0%)
3707 2024-10-29
#23
0 games - 0W 0D 0L (0%)
3728 2024-10-24
#134
6 games - 2W 4D 0L (33%)
3400 2024-09-30
#515
0 games - 0W 0D 0L (0%)
2252 2024-09-21
#681
2 games - 2W 0D 0L (100%)
1828 2024-09-20
#719
0 games - 0W 0D 0L (0%)
1690 2024-09-10
#310
2 games - 0W 1D 1L (0%)
2758 2024-09-02
#22
0 games - 0W 0D 0L (0%)
3729 2024-08-17
#250
1 games - 1W 0D 0L (100%)
2994 2024-08-11
#849
5 games - 0W 0D 5L (0%)
1092 2024-07-31
#163
0 games - 0W 0D 0L (0%)
3315 2024-07-22
#78
1 games - 0W 1D 0L (0%)
3356 2024-07-11
#63
0 games - 0W 0D 0L (0%)
3642 2024-07-01
#54
0 games - 0W 0D 0L (0%)
3670 2024-06-14
#465
0 games - 0W 0D 0L (0%)
2362 2024-06-05
#121
0 games - 0W 0D 0L (0%)
3070 2024-05-28
#114
4 games - 2W 2D 0L (50%)
3458 2024-05-25
#220
1 games - 1W 0D 0L (100%)
3093 2024-04-29
#286
3 games - 2W 1D 0L (67%)
2828 2024-04-13
#211
5 games - 3W 1D 1L (60%)
3126 2024-04-03
#12
7 games - 5W 2D 0L (71%)
3751 2024-03-31
#197
6 games - 1W 5D 0L (17%)
3194 2024-03-22
#92
0 games - 0W 0D 0L (0%)
3531 2024-03-18
#548
0 games - 0W 0D 0L (0%)
2169 2024-03-18
#81
0 games - 0W 0D 0L (0%)
3560 2024-03-15
#526
0 games - 0W 0D 0L (0%)
2215 2024-03-11
#708
0 games - 0W 0D 0L (0%)
1713 2024-03-01
#66
2 games - 0W 1D 1L (0%)
3622 2024-02-28
#41-42
1 games - 1W 0D 0L (100%)
3543 2024-02-04
#153
2 games - 2W 0D 0L (100%)
3352 2024-02-03
#551
0 games - 0W 0D 0L (0%)
2165 2024-02-03
#108
2 games - 0W 2D 0L (0%)
3477 2024-01-21
#217
1 games - 0W 1D 0L (0%)
3107 2023-12-14
#384
2 games - 1W 1D 0L (50%)
2564 2023-09-24
#665
0 games - 0W 0D 0L (0%)
1865 2023-09-15
#679
0 games - 0W 0D 0L (0%)
1839 2023-08-29
#556
0 games - 0W 0D 0L (0%)
2145 2023-06-09
#184
0 games - 0W 0D 0L (0%)
3245 2023-06-01
#187
1 games - 0W 1D 0L (0%)
3229 2023-05-25
#328
1 games - 1W 0D 0L (100%)
2714 2023-04-17
#129
0 games - 0W 0D 0L (0%)
3421 2023-03-28
#124
0 games - 0W 0D 0L (0%)
3438 2023-03-02
#77
1 games - 1W 0D 0L (100%)
3575 2023-01-29
#50
1 games - 0W 0D 1L (0%)
3682 2023-01-15
#387
3 games - 3W 0D 0L (100%)
2553 2023-01-09
#585
2 games - 0W 1D 1L (0%)
2077 2022-10-18
#585
0 games - 0W 0D 0L (0%)
2078 2022-09-23
#745
0 games - 0W 0D 0L (0%)
1593 2022-09-06
#496
0 games - 0W 0D 0L (0%)
2308 2022-07-06
#572
0 games - 0W 0D 0L (0%)
2110 2022-06-03
#560
0 games - 0W 0D 0L (0%)
2143 2022-04-05
#709
1 games - 0W 0D 1L (0%)
1708 2022-03-10
#459
1 games - 0W 0D 1L (0%)
2384 2022-02-06
#567
0 games - 0W 0D 0L (0%)
2120 2022-02-06
#125
0 games - 0W 0D 0L (0%)
3437 2022-01-15
#442
0 games - 0W 0D 0L (0%)
2422 2021-12-30
#211
0 games - 0W 0D 0L (0%)
3131 2021-11-30
#326
0 games - 0W 0D 0L (0%)
2727 2021-11-11
#339
3 games - 2W 1D 0L (67%)
2678 2021-09-14
#241
1 games - 1W 0D 0L (100%)
3035 2021-08-30
#431
1 games - 0W 0D 1L (0%)
2439 2021-08-29
#222
0 games - 0W 0D 0L (0%)
3087 2021-08-21
#129
0 games - 0W 0D 0L (0%)
3425 2021-08-04
#448
9 games - 2W 1D 6L (22%)
688 2021-06-14
#809
0 games - 0W 0D 0L (0%)
1331 2021-06-13
#183
3 games - 2W 0D 1L (67%)
3248 2021-05-02
#165
3 games - 2W 1D 0L (67%)
2754 2021-01-01
#769
0 games - 0W 0D 0L (0%)
1510 2020-06-21
#770
7 games - 0W 5D 2L (0%)
1509 2020-06-19
#216
1 games - 1W 0D 0L (100%)
3111 2020-01-16
#540
1 games - 0W 0D 1L (0%)
2188 2019-11-17
#149
1 games - 1W 0D 0L (100%)
3360 2019-08-23
#130
0 games - 0W 0D 0L (0%)
3416 2019-02-07
#750
1 games - 0W 1D 0L (0%)
1578 2019-01-16
#517
0 games - 0W 0D 0L (0%)
2245 2018-10-24
#198
0 games - 0W 0D 0L (0%)
3188 2018-10-03
#723
0 games - 0W 0D 0L (0%)
1667 2018-06-09
#462
0 games - 0W 0D 0L (0%)
2373 2018-03-08
#662
0 games - 0W 0D 0L (0%)
1872 2018-01-12
#190-191
1 games - 1W 0D 0L (100%)
2605 2017-07-03
Limitations: Engines have been tested but reliability cannot be guaranteed · maximum 5 seconds computer move time · 32MB hash table · pawns auto-promote to queens.