Guess the Code Game

Read the clues and tap the one code that fits them all.

Question 1 of 10

3 digits, none repeated. 390: two right, one in place. 304: two right, one in place. 169: one right, in place.

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Pick an answer, then press Check answer. Then you see Correct or Not quite, with the reason. Keys: A to D pick, Enter checks.

Scored round: 10 questions, no time limit.

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Written for this site. Not affiliated with any game maker or puzzle book. Answers last checked October 2, 2026.

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How it works

In this guess the code game a lock has three or four different digits. Each clue is a guess, and it says how many of its digits are right and whether they are in place. One code fits every clue.

Read the full guide

How to read a clue

314: one right, in place means the code shares exactly one digit with 314, in the same position. Out of place means the digit is in the code, but somewhere else. None right rules out every digit of that guess. The puzzles come in three sets: three clues, five clues and four-digit codes.

The pencil game for two

1. Each player writes down a secret code of four different digits. 2. Take turns guessing the other player's code. 3. After each guess, the other player says how many digits are right and in place, and how many are right but out of place. 4. The first to name the other's code wins. It is the old game of bulls and cows.

Questions and answers

How do you solve a guess the code puzzle?

Where a clue says none right, begin there and cross out its digits in every other clue. Then test what is left against the clues about place. One code fits them all.

Does every puzzle have exactly one answer?

Yes. Each puzzle was checked against every possible code, and exactly one fits. Every clue is needed: take one away and more than one code fits.

Where is the reasoning for each code?

Tap a code and the card shows the right one, then goes through the clues one by one: which digits each clue shares with the code, and whether they are in place.

All 41 questions with answers

Three clues 11

3 digits, none repeated. 062: two right, one in place. 370: one right, in place. 426: two right, one in place. Answer: 460. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 063: one right, out of place. 760: one right, in place. 456: two right, out of place. Answer: 540. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 187: two right, out of place. 961: two right, out of place. 897: two right, one in place. Answer: 819. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 269: one right, in place. 568: two right, in place. 540: two right, in place. Answer: 560. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 390: two right, one in place. 304: two right, one in place. 169: one right, in place. Answer: 349. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 501: two right, in place. 425: two right, out of place. 790: none right. Answer: 541. Source: Own work: a logic puzzle with one provable answer

Show all 41 puzzles (35 more)

Three clues, continued

3 digits, none repeated. 581: one right, out of place. 123: two right, one in place. 394: two right, one in place. Answer: 134. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 671: two right, one in place. 165: all three right, one in place. 921: one right, out of place. Answer: 615. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 759: two right, one in place. 653: two right, one in place. 247: none right. Answer: 956. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 936: one right, in place. 091: one right, in place. 964: two right, out of place. Answer: 046. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 940: one right, out of place. 213: two right, in place. 160: none right. Answer: 293. Source: Own work: a logic puzzle with one provable answer

Five clues 20

3 digits, none repeated. 174: one right, out of place. 705: one right, out of place. 571: one right, in place. 293: one right, in place. 089: none right. Answer: 543. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 175: one right, out of place. 098: one right, in place. 217: one right, in place. 321: one right, out of place. 148: none right. Answer: 037. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 194: one right, in place. 309: one right, in place. 583: one right, out of place. 650: one right, out of place. 285: none right. Answer: 364. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 234: one right, out of place. 869: one right, in place. 751: one right, out of place. 840: one right, in place. 197: none right. Answer: 825. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 251: one right, in place. 193: one right, in place. 719: one right, out of place. 708: one right, out of place. 413: none right. Answer: 290. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 271: one right, in place. 473: one right, out of place. 305: one right, out of place. 263: one right, in place. 603: none right. Answer: 254. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 318: one right, out of place. 824: one right, in place. 052: one right, in place. 083: one right, out of place. 960: none right. Answer: 857. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 346: one right, out of place. 537: one right, in place. 541: one right, out of place. 230: one right, in place. 708: none right. Answer: 139. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 359: one right, out of place. 239: two right, out of place. 469: one right, out of place. 480: one right, in place. 816: none right. Answer: 920. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 419: one right, in place. 751: one right, out of place. 926: one right, in place. 968: one right, out of place. 581: none right. Answer: 476. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 542: one right, in place. 350: one right, out of place. 123: one right, out of place. 863: one right, in place. 039: none right. Answer: 561. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 548: one right, out of place. 682: one right, out of place. 863: one right, in place. 237: one right, in place. 803: none right. Answer: 467. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 657: one right, out of place. 816: one right, in place. 936: one right, out of place. 473: one right, in place. 296: none right. Answer: 513. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 674: one right, out of place. 087: one right, in place. 462: one right, out of place. 105: one right, in place. 598: none right. Answer: 127. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 697: one right, in place. 203: one right, in place. 196: one right, out of place. 532: one right, out of place. 875: none right. Answer: 643. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 765: one right, in place. 548: one right, out of place. 056: two right, out of place. 783: one right, out of place. 193: none right. Answer: 860. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 804: two right, out of place. 861: one right, out of place. 930: one right, in place. 238: one right, out of place. 531: none right. Answer: 780. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 816: one right, out of place. 078: one right, in place. 047: one right, in place. 589: one right, out of place. 417: none right. Answer: 065. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 830: one right, out of place. 120: two right, out of place. 172: two right, out of place. 519: one right, out of place. 984: none right. Answer: 701. Source: Own work: a logic puzzle with one provable answer
3 digits, none repeated. 905: one right, in place. 690: one right, out of place. 318: one right, in place. 478: one right, out of place. 324: none right. Answer: 917. Source: Own work: a logic puzzle with one provable answer

Four-digit codes 10

4 digits, none repeated. 0469: two right, in place. 6210: two right, one in place. 7694: one right, out of place. 2817: one right, out of place. 5847: none right. Answer: 0239. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 1863: one right, in place. 5260: one right, in place. 1479: three right, one in place. 0324: one right, out of place. 8625: none right. Answer: 1790. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 2405: two right, out of place. 4153: three right, out of place. 3751: two right, one in place. 5628: two right, one in place. 3927: none right. Answer: 5841. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 3827: two right, out of place. 8947: three right, one in place. 0975: two right, out of place. 7216: one right, out of place. 5016: none right. Answer: 9743. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 4703: two right, one in place. 8432: two right, one in place. 9826: two right, out of place. 9401: two right, out of place. 0712: none right. Answer: 4639. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 4731: two right, one in place. 9650: two right, one in place. 8947: one right, out of place. 4082: two right, out of place. 7983: none right. Answer: 0451. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 7346: three right, one in place. 4219: two right, one in place. 8406: two right, out of place. 8904: one right, in place. 1095: none right. Answer: 7264. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 7540: two right, one in place. 1753: one right, in place. 2891: two right, one in place. 7162: two right, out of place. 5638: none right. Answer: 2749. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 8750: one right, in place. 0156: one right, out of place. 5987: two right, one in place. 2648: three right, out of place. 3470: none right. Answer: 8962. Source: Own work: a logic puzzle with one provable answer
4 digits, none repeated. 9781: two right, one in place. 4956: two right, one in place. 8736: one right, out of place. 4019: three right, out of place. 7653: none right. Answer: 0984. Source: Own work: a logic puzzle with one provable answer

How this list was compiled: Own work. The Game Night Generator editors made 41 code puzzles on 2 and 3 October 2026: 11 with a three-digit code and three clues, 20 with a three-digit code and five clues, and 10 with a four-digit code and five clues. No digit repeats inside a code or inside a clue. Every puzzle was proved by trying every possible code of three or four different digits: exactly one fits all of its clues, every clue is needed, and each wrong choice fails at least one clue. The pencil game for two in the page's guide is the traditional game Bulls and Cows, read on 2 October 2026 in its English Wikipedia article (https://en.wikipedia.org/wiki/Bulls_and_cows; text under the Creative Commons Attribution-ShareAlike license). No boxed game is described. Licence: own work