Non capture positions

Win: 1.452.604 (0.4%)
Draw: 194.469.458 (50.6%)
Lose: 188.395.854 (49.0%)

All positions

Win: 7.416.707 (1.2%)
Draw: 311.017.826 (50.0%)
Lose: 303.300.317 (48.8%)

Native examples were selected after counting from 11930 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 9, Black 1.

W:W10,14,33:BK40,K41,43

MoveResult
10-4Draw
14-9Draw
33-28Draw
10-5Win
33-29Draw

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 15, Black 1.

W:W11,34,36:BK4,K42,45

MoveResult
11-6Loss
34-29Loss
11-7Draw
34-30Loss
36-31Loss

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.

No qualifying example proved from the available WDL data.

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 15, Black 1.

B:W8,30,47:BK4,K10,45

MoveResult
4-9Draw
4-13Win
4-18Draw
4-22Draw
4-27Draw
4-31Draw
4-36Draw
10-5Draw
10-14Draw
10-19Draw
10-23Draw
10-28Draw
10-32Draw
10-37Draw
10-41Draw
10-46Draw
10-15Draw
45-50Draw

Promotion trap

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

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Black to move: Win. Pip count: White 8, Black 1.

B:W6,11,26:BK12,45,K49

MoveResult
12-7Draw
12-1Win
12-8Draw
12-3Draw
12-17Draw
12-21Draw
12-18Win
12-23Win
12-29Win
12-34Win
12-40Draw
49-43Draw
49-38Draw
49-32Draw
49-27Draw
49-21Draw
49-16Draw
49-44Draw
49-40Win
49-35Draw
45-50Draw

Both sides at highest pip count: win

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

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Black to move: Win. Pip count: White 27, Black 9.

B:W46,47,48:BK1,K2,5

MoveResult
1-6Win
1-7Win
1-12Win
1-18Win
1-23Win
1-29Win
1-34Win
1-40Win
1-45Win
2-7Win
2-11Win
2-16Win
2-8Win
2-13Win
2-19Win
2-24Win
2-30Win
2-35Win
5-10Win

Both sides at highest pip count: loss

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

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White to move: Loss. Pip count: White 27, Black 9.

W:W46,47,48:BK1,K2,5

MoveResult
47-41Loss
48-42Loss
46-41Loss
47-42Loss
48-43Loss