Non capture positions

Win: 11.146.803 (2.9%)
Draw: 367.330.453 (97.0%)
Lose: 116.698 (0.0%)

All positions

Win: 192.935.060 (28.0%)
Draw: 489.510.735 (70.9%)
Lose: 7.826.755 (1.1%)

Native examples were selected after counting from 9734 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 8, Black 0.

W:W6,9,K13,32:BK36,K44

MoveResult
13-8Draw
13-2Draw
13-18Draw
13-22Draw
13-27Draw
13-31Draw
13-19Draw
13-24Draw
13-30Draw
13-35Draw
9-3Draw
32-27Draw
6-1Draw
9-4Win
32-28Draw

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 21, Black 0.

W:W22,41,K47,48:BK15,K35

MoveResult
47-42Loss
47-38Loss
47-33Loss
47-29Loss
47-24Loss
47-20Loss
22-17Loss
41-36Loss
48-42Draw
22-18Loss
41-37Loss
48-43Loss

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.

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White to move: Win. Pip count: White 17, Black 0.

W:W9,K13,43,45:BK23,K36

MoveResult
13-8Draw
13-2Draw
13-18Loss
13-22Loss
13-27Loss
13-31Loss
13-19Loss
13-24Draw
13-30Draw
13-35Draw
9-3Draw
43-38Loss
45-40Draw
9-4Win
43-39Loss

Win with fewer pieces

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

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Black to move: Win. Pip count: White 4, Black 0.

B:WK1,6,7,11:BK2,K16

MoveResult
2-8Loss
2-13Loss
2-19Loss
2-24Loss
2-30Loss
2-35Loss
16-21Win
16-27Win
16-32Win
16-38Win
16-43Win
16-49Win

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 18, Black 0.

B:WK5,16,38,42:BK41,K46

MoveResult
41-36Draw
41-37Loss
41-32Loss
41-28Draw
41-23Draw
41-19Draw
41-14Draw
41-10Draw
41-47Draw

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 13, Black 0.

W:W6,30,K35,38:BK8,K23

MoveResult
35-40Draw
35-44Draw
35-49Draw
30-24Win
38-32Draw
6-1Draw
30-25Draw
38-33Draw

Promotion trap

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

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White to move: Win. Pip count: White 7, Black 0.

W:W6,14,K17,22:BK24,K50

MoveResult
17-11Win
17-12Draw
17-8Draw
17-3Draw
17-21Draw
17-26Draw
14-9Draw
6-1Draw
14-10Draw
22-18Draw

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.