17451 Players currently online!
Man vs. Machine - good luck!
Turn-based games at any time!
Vote for the best move to win!
Do you have what it takes?
Backgammon, Yatzy, and more!
Sharpen your tactical vision!
Get advice and game insights!
Learn from top players & pros!
View millions of master games!
Your virtual chess coach!
Perfect your opening moves!
Test your skills vs. computer!
Find the right private coach!
Can you solve it each day?
Bring it all together!
Beginners, start here!
Make friends & play team games!
News from the world of chess!
Search all Chess.com members!
Find local clubs & events!
Who's the best of your friends?
Read what members are saying!
Here's another tough PG with lots of pawn captures.
Find a legal game that reaches the diagram after Black's 26th move.
This one was surprisingly very easy, and very fun.
Looking at the board, we see black has made at least 4 captures, and white has lost 5 pawns, 4 of which (a, b, c, e) are useless for helping black's pawn structure. Therefore white has promoted at least 3 of those pawns (f-pawn could have been captured by bPe3xf2.)
Now counting ply, white has made 2N, 1R, 5K and at least (3 x 6)P ply, which adds up to 26 ply exactly. So we have established that white has promoted exactly 3 pawns, and sacced each of them on a square within one ply range of their promotions.
Counting black's moves, he has made at least 2K and 4 (e-pawn) + 5 (the other kingside pawns) = 11 ply. That leaves him 15 ply to do what? Seeing as black's a-, b- and c- pawns are absent, they could have promoted.
A little mental plotting of pawn trajectories suggests the black a- and b- pawns promoted on a1, the white c- and d-pawns on d8 (sac to h4 and g5) and the e-pawn on e8 (sac to h5). This means that the black pawn moves must've been Pe7-e5-e4-e3xf2, Pf7-f6xg5xh4, Pg7-g6xh5 and Ph7-h6. (...Pf6 after wBh4 and g5, ...Pg6 after wBh5.) So black has made 2K ply, 10 kingside pawn ply and 14P promote-and-return-to-d8 ply. 26 total.
Construction is now easy, bearing in mind the choreographed dancing of the kings to avoid checks.
This one won 1st Honorable Mention in StrateGems 2012.
why do people say thanks?
by Charlotte a few minutes ago
Chess.com's Weekly Study: January 17th 2016
by n9531l a few minutes ago
Computer analysis - Legends
by ChessOath 3 minutes ago
How fast should I castle?
by ANOK1 3 minutes ago
by ChessOath 6 minutes ago
best song to listen to while playing chess
by ANOK1 8 minutes ago
5/3/2016 - The Slip
by aidenkang04 10 minutes ago
Anybody owning the Staunton Europa?
by BungaBungaFischer 12 minutes ago
Special dedicated to my Angsa Cantik
by Anti-Runner 16 minutes ago
2826-4000 Worst Things To Do While Playing Chess
by ChessPlayinDude47 17 minutes ago
Why Join | Chess Topics |
Help & Support |
© 2016 Chess.com
• Chess - English
We are working hard to make Chess.com available in over 70 languages. Check back over the year as we develop the technology to add more, and we will try our best to notify you when your language is ready for translating!