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[what is this?]

3rd rank rook deployment . 11 games, 1890-2009 Connected Passed Pawns . 1 game, 1908 Ground Truth in opp-colored KBPP vs KBP endgames games such that they reach an opposite-colored KBPP vs KBP endgame ​and ​there was at least one result-changing error after that point ​ and ​I posted the tablebase report of what those errors were ​ ​ ​ Honorable mention goes to A Pena Riasco vs J Henrichsen, 2013, in which, on 3 consecutive moves, black could've drawn by going into an opposite-colored KBPP vs KBP endgame, but when black finally did so, it was lost and white kept the win from that point on. The "usual situation" for this collection is ​connected passers vs. passer, with at least 2 pawnless files in-between. 12 games, 1896-2016 too many sacs Games where one side sacrifices so much material that they do not have enough left to finish the attack. 5 games, 1849-2003