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5 votes

Simplest position where promotion to rook is unique drawing move

I think I found a position with 7 units [Title "White to play and draw"] [FEN "6Kn/6PP/6kb/7r/8/8/8/8 w - - 0 1"] 1. gxh8=R! Rf5 1.gh8Q? (or 1.gh8B?) loses to 1...Rf5! 1.Kh8? (or ...
Evargalo's user avatar
  • 16.4k
4 votes
Accepted

Simplest position where promotion to rook is unique drawing move

Six units (verified by both the Nalimov and Syzygy tablebases): [Title "NDE(?) after Lazard: White to move and draw"] [FEN "8/1P7/r4k1b/8/8/8/p7/K7 w - - 0 1"] 1. b8=R! Bg7 2. Rb2!...
Noam D. Elkies's user avatar
3 votes

Simplest position where promotion to rook is unique drawing move

This 7-unit draw-study is in PDB with id P1394451. [Title "Marek Kacewicz; Szachy, Jun 1980, 36v"] [StartFlipped "0"] [fen "8/p2b4/PP5b/K7/5k2/8/8/8 w - - 0 1"] 1.b7! ...
Rosie F's user avatar
  • 6,385
3 votes
Accepted

Max number of promoted units on the board in a monochromatic game

It takes four captures to promote a pawn in monochromatic. Only 15/16 of each sides' pieces are capturable. Thus, in theory, each side may only promote three pawns at most, or a total maximum of six ...
Rewan Demontay's user avatar
3 votes

Position where promotion to bishop is the unique best move?

This answer brings two additions to the already existing answers: One example to demonstrate another motivation for a bishop promotion : self-stalemating. [FEN "1K6/PP1k4/2r5/1n6/r7/8/8/8 w - - ...
Evargalo's user avatar
  • 16.4k
2 votes

Position where promotion to bishop is the unique best move?

[fen "3n3k/1P2N3/6K1/8/8/8/8/8 w - - 0 1"] 1. b8=B Nc6 2. Nxc6 Kg8 3. Bd6 Kh8 4. Bf4 Kg8 5. Bh6 Kh8 6. Bg7+ Kg8 7. Ne7#
Gotitinaday's user avatar
1 vote

Max number of promoted units on the board in a monochromatic game

I want to complement @RewanDemontay's accepted answer. It's clear that the number of promotions can't be more than 6, because each promotion involves 4 captures, plus the promoted unit itself which is ...
Laska's user avatar
  • 12.1k
1 vote

Promote a piece to queen by moving back aside of king?

I had a crashed play, and set-up the board manualy. As I was playing black, I mistakenly flipped the board. Thereby the computer thought I'm already on the other side.
Gaston's user avatar
  • 111
1 vote
Accepted

Running out of time mid promotion to checkmate. Who wins?

Who won? Nobody won. It was a draw. According to the FIDE Laws of Chess: Except where one of Articles 5.1.1, 5.1.2, 5.2.1, 5.2.2, 5.2.3 applies, if a player does not complete the prescribed number ...
Brian Towers's user avatar
  • 98.3k

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