So similar :D

Please mention in the description that different providers can have the same name.

Nice kata

It seems you're not allowed to lead with a point card. I didn't see this in the description.

Stars are also used for markup, to make text bold or italic. So in the description they get omitted.

Try using ```*3*``` or \*3\* instead of *3*, to show the stars correctly.

Given initial array

[
  'KJ', 'JK', 'wr', 'Dk', 'N6', 'oU', 'Uo', 'sX',
  'Kc', 'cK', '5A', 'A5', 'xT', 'Tx', 'RO', 'OR',
  'yV', 'Vy', '8Q', 'qq', 'KM', 'MK', 'kQ', 'Qk',
  'Hy', 'yH', 'BQ', 'QB', 'jP', 'Pj', 'ZN', 'wI',
  'Iw', 'Yo', 'oY', 'EO', 'Yx', 'xY', 'cJ', 'Jc',
  'yr', 'ry', 'fe', 'ef', 'll', 'll', 'Hq', 'U5',
  'g3', '3g', 'BB', 'yN', 'Ny', 'A0', '0A', 'Nv',
  'aR', 'Ra', 'Po', 'oP', 'ab', 'p2', '2p', 'wd',
  'dw', 'Ev', 'vE', 'pm', 'ir', 'ri'
]

The first entry of the reference solution is {"wr":["wrriirryyVVyyHHyyNN6","wrriirryyVVyyHHyyNNvvEEOORRaab"]}. This doesn't satisfy the rule that chains in each of resulting array's element's value should respect initial array's elements order. You can't continue the chain after wrri because ri is the last element.

Also, I would expect the solution to start with {"KJ":["KJJc",...]}. But that's another issue.

Please fix the solution or describe the problem better.

Good job !

Years like 1700 are not leap years: https://en.wikipedia.org/wiki/Leap_year

Some cases in the random tests are still pretty strange.

For example, starting from the board:

k.......
.B..Q...
...p....
.....P.q
n.p..P..
....RP..
.....N..
...Br..K

The moves are ['h1-g1', 'a8xb7', 'f5-f6', 'f2-e3', 'g1-f1']. The fourth move f2-e3 moves a white knight into a square with a white rook. Three observations:

• White is moving, but it's black turn
• The knight is not moving like a knight
• A piece is capturing its own color

It's sometimes hard to judge whether things are an issue when you don't have to validate if moves are legal. But I think at the very least the third observation should not be in the test cases. Perhaps also the first. This will also improve the experience for people solving the kata.

Looks good !

Well I have to solve the kata first...

Please make sure that moves in the random tests don't move onto a square with a piece of the same color.

For example, I had one random test starting from position:

kn......
........
..R.P...
..P..P..
..P.P...
..P.....
.bqB..b.
Q....nrK

The moves are ['c6-c8', 'b2xc3', 'c4-c5', 'c3xa1', 'e6-e7', 'a8-b7', 'h1xg1', 'g2-h3']. The third move c4-c5 moves a white pawn into a square with another white pawn.

Side note: I know there is no need to validate if moves are legal, so in this test case it's fine that moves are made while kings are in check. I just think that capturing your own pieces is an issue.

My pleasure. I use an online chess board to play the moves.

Something similar occurs in the fourth test case in Complicated Move Sequences. Here the move g3xd4 is not possible. There is no piece on g3. I think you mean f3xd4.

In the second test case in Complicated Move Sequences, the move b3-d5 is not possible. There is no piece on b3. I think you mean c3-d5.