Non capture positions

Win: 469.575 (98.4%)
Draw: 7.865 (1.6%)
Lose: 0 (0.0%)

All positions

Win: 821.215 (99.1%)
Draw: 7.865 (0.9%)
Lose: 0 (0.0%)

Native examples were selected after counting from 10884 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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White to move: Win. Pip count: White 0, Black 1.

W:WK9,K14,K32:B45

MoveResult
9-3Draw
9-4Draw
9-13Draw
9-18Draw
9-22Win
9-27Draw
9-31Draw
9-36Draw
14-10Draw
14-5Draw
14-19Draw
14-23Draw
14-28Draw
14-20Draw
14-25Draw
32-27Draw
32-21Draw
32-16Draw
32-28Draw
32-23Draw
32-19Draw
32-37Draw
32-41Draw
32-46Draw
32-38Draw
32-43Draw
32-49Draw

Only move to draw

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

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Black to move: Draw. Pip count: White 0, Black 1.

B:WK1,K3,K43:B44

MoveResult
44-50Draw
44-49Loss

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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Black to move: Draw. Pip count: White 0, Black 1.

B:WK1,K36,K41:B45

MoveResult
45-50Draw

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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White to move: Win. Pip count: White 0, Black 1.

W:WK1,K13,K24:B44

MoveResult
1-6Draw
1-7Draw
1-12Draw
1-18Draw
1-23Draw
1-29Draw
1-34Draw
1-40Win
1-45Draw
13-8Draw
13-2Draw
13-9Draw
13-4Draw
13-18Draw
13-22Draw
13-27Draw
13-31Draw
13-36Draw
13-19Draw
24-19Draw
24-20Draw
24-15Draw
24-29Draw
24-33Draw
24-38Draw
24-42Draw
24-47Draw
24-30Draw
24-35Draw

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.