Non capture positions

Win: 0 (0.0%)
Draw: 40.920 (99.4%)
Lose: 236 (0.6%)

All positions

Win: 3.240 (5.5%)
Draw: 54.988 (93.5%)
Lose: 572 (1.0%)

Native examples were selected after counting from 13793 sampled White-quiet boards, including targeted starting-rank and losing candidates. Statistics still cover every enumerated position. An absent example does not prove the category is absent.


Special WDL positions

One example per category. Every starting position is double quiet: neither side has a capture. Results and move outcomes are relative to the player to move in the diagram. Kings have a double ring.

White-to-move examples are preferred; Black-to-move examples are retained when no qualifying White-to-move example was found.

Pip count means remaining rank distance to promotion (kings: zero). Highest pip count puts men nearest their starting ranks; both sides must simultaneously attain their material's maximum. Material disadvantage means fewer pieces.

Only move to win

At least three legal moves; exactly one wins and every alternative draws or loses.

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Black to move: Win. Pip count: White 0, Black 0.

B:WK1:BK17,K50

MoveResult
17-11Draw
17-6Draw
17-12Draw
17-8Draw
17-3Draw
17-21Draw
17-26Draw
17-22Draw
17-28Draw
17-33Draw
17-39Draw
17-44Draw
50-44Draw
50-39Draw
50-33Draw
50-28Draw
50-22Draw
50-45Win

Only move to draw

At least two legal moves; exactly one draws and every alternative loses.

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White to move: Draw. Pip count: White 0, Black 0.

W:WK6:BK15,K50

MoveResult
6-1Draw
6-11Loss
6-17Loss
6-22Loss
6-28Loss
6-33Loss
6-39Loss
6-44Loss

Mutual zugzwang

On this same board, White to move loses and Black to move loses.

No qualifying example proved from the available WDL data.

Whoever moves wins

On this same board, White to move wins and Black to move wins.

No qualifying example proved from the available WDL data.

Win with fewer pieces

The player to move has fewer pieces and a proven win.

No qualifying example proved from the available WDL data.

Draw with fewer pieces

The player to move has fewer pieces and a proven draw.

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White to move: Draw. Pip count: White 0, Black 0.

W:WK2:BK49,K50

MoveResult
2-7Draw
2-11Loss
2-16Draw
2-8Draw
2-13Draw
2-19Draw
2-24Draw
2-30Draw
2-35Draw

Unique winning sacrifice

Exactly one of at least two moves wins; every compulsory reply captures the piece offered by that move.

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Black to move: Win. Pip count: White 0, Black 0.

B:WK16:BK2,K50

MoveResult
2-7Draw
2-11Draw
2-8Draw
2-13Draw
2-19Draw
2-24Draw
2-30Draw
2-35Draw
50-44Draw
50-39Draw
50-33Draw
50-28Draw
50-22Draw
50-17Draw
50-11Win
50-6Draw
50-45Draw

Promotion trap

A promotion draws or loses, while a non-promoting move wins.

No qualifying example proved from the available WDL data.

Both sides at highest pip count: win

Both sides attain their maximum pip count; the player to move wins.

No qualifying example proved from the available WDL data.

Both sides at highest pip count: loss

Both sides attain their maximum pip count; the player to move loses.

No qualifying example proved from the available WDL data.