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{|
| <fentt border="double" style="font-size:24pt">...Q..../......../......../(....)K.../(.....).../(.....).../(pk...).../(.[k]k...)...</fentt>| <fentt border="double" style="font-size:24pt">.......Q/......../......../(....)K.../(.....).../(.....).../(pk...).../(.k....)...</fentt>
|-
| Draw, ¬([[King|♚]][[Squares|a1]] ∧ [[Queen|♕]][[Square Control|⤇]][[Squares|c1]])
| Win due to [[Discovered Check|discovered check]]
|}
Critical squares are the neighbouring square on the [[Pawn Spans|luff-side]] (i.e. for black pawn on c2, d2),
and the diagonal neighbouring square on the lee-side one rank back (i.e. for black pawn on c2, b3).
Only if the attacking king can reach these squares in one move, it can assist in a [[Checkmate|checkmate|Checkmate]] with the queen - otherwise it is a draw
- except the rare cases the attacking king may reduce the [[Distance|Chebyshev distance]] accordantly, giving [[Discovered Check|discovered check]] <ref>Lee-case implemented as [[Interior Node Recognizer]] in [[IsiChess]]</ref>.
{|
| <fentt border="double" style="font-size:24pt">...Q..../......../......../......../(...)K..../(.+...).../(.kp+.).../kk[k]k(...)...</fentt>
| <fentt border="double" style="font-size:24pt">.......Q/......../......../......../(...)K..../(.+...).../(.kp+.).../k.(...)...</fentt>
|-
| Draw, ¬([[King|♚]][[Squares|a1]] ∧ [[Queen|♕]][[Square Control|⤇]][[Squares|c1]])
| Win due to [[Discovered Check|discovered check]]
|}
==Luff case==
When the defending king supports its pawn from the "wrong" [[Pawn Spans|luff-side]], including occupying its [[Promotion Square|promotion square]], the <span style="background-color: #c0ffc0;">winning area </span> for the attacking king is enlarged by at least one move, in luff-direction even two moves.The critical luff-side square is now one more file farther away (i.e. for black pawn on c2, e2), and both squares need one critical square needs to be reached in two moves now,
to either transpose to a winning [[#Lee|lee-side case]], or to assist in a checkmate on the luff-side.
