# The longest checkmate problem - 290 move

Otto Blathy was born in Tata, Hungary on August 11, 1860 and he is credited for creating a mate in 290 moves. This problem is the longest checkmate problem and Blathy won a prize for this work in 1929. The position is not legal (easy retro analysis) and it is easy to convert it to a legal position, but the original Blathy position is shown. The analysis/solution given here was done by Cyril Banderier in 1992 and has been online since 1998.  Mr. Blathy died on September 26, 1939 in Budapest.

insane.

How about 3.b4 and mate in 2?

@Player8-CHAMPION: Then there will be indeed a mate in 2: 3. b4 Nd5+ 4. Ka6 Bb7#. Only the wrong colour. :-)

Unbelievably amazing. An alien from another planet probably give him this problem.

Player8-CHAMPION

1....Rd1+ Bd4

2....c4+ Kd6

3....Rxg1 Bc3

4....Rd1+ Bd4

5....b4 b1=Q

6....Rxb1 cxb4+

Mandy711 : LOOOOL

LoekBergman: Nd5+ is illegal, the knight is pinned by the bishop. though I figured that that pawn on b2 spoils it all :p

@Player8-Champion: oops, I stand corrected.

Ayoubi-W wrote:

Otto Blathy was born in Tata, Hungary on August 11, 1860 and he is credited for creating a mate in 290 moves. This problem is the longest checkmate problem and Blathy won a prize for this work in 1929. The position is not legal (easy retro analysis) and it is easy to convert it to a legal position, but the original Blathy position is shown. The analysis/solution given here was done by Cyril Banderier in 1992 and has been online since 1998.  Mr. Blathy died on September 26, 1939 in Budapest.

I like it!

i doubt this.

thanks all for feedback, hope you enjoyed

This is one of few problems that computers don't understand. Triangulation with the king is out of there mind.

Position with one additional bishop on the same color tends not to be detected as illegal position. Chessmaster might be the only program that display error message - atleast from what i'm aware off.

[COMMENT DELETED]

White has 2 fighter of the same color and 8 farmers, it's impossible??!!

LOOL !

Houdini 3 Pro's evaluation on Blathys puzzle:

Houdini 3 Pro x64 -4.80 (depth 22)

Main line suggestion: 1.Rd1+ 1...Bd4 2.c4+ Kd6 3.Rxg1 h4 4.Rd1 h3 5.Ka5 h5 6.Ka4 h6 7.Ka3 h4 8.Rh1 Bb7 9.Ka2 h2 10.Kb1 Ba8 11.Ka2 h5 12.Rxh2 Bg7 13.Rh1 Bf6 14.Rd1+ Bd4 15.Rh1

1. ( -14.84 (depth 21) 1.Bxe7 Bdxe7 2.Rd1+ Bd4 3.c4+ Kd6 4.Rxg1 h4 5.Rb1 h3 6.Rd1 h2 7.Rh1 Bef6 8.Rd1 Bd8 9.Ka5 Ke7 10.Ka4 Kf6 11.Ka3 Kxf5 12.Ka2 Nxe6 13.Rh1 Bc7 14.Rxh2 Bxb8 15.Rh5+)
2. ( -25.56 (depth 21) 1.c4+ Kd4 2.Ka5 Nd5+ 3.Ka4 Nc3+ 4.Ka3 Nxb1+ 5.Kxb2 Nd2 6.Bd6 Nxe2 7.Kc2 Nxf3 8.Bxc5+ Kxc5 9.Kd3 Nfd4 10.Kxe3 h4 11.Kf2 h3 12.Kf1 Nxf4 13.Kg1 Nxf5 14.Kh2 Bd4 15.Kh1)
3. ( #-9 (depth 21) 1.Ka5 Nb5+ 2.Ka4 Nc3+ 3.Ka3 Nxb1+ 4.Ka2 Bc3 5.Kxb1 Nxf3 6.exf3 e2 7.Ka2 e1=Q 8.b4 Qa1+ 9.Kb3 b1=Q#)

It's not that computers can't see triangulation. It's that they have trouble seeing 290 moves ahead outside of an endgame tablebase.

Agree - sorry for being late :)

Ayoubi-W wrote:

... it is easy to convert it to a legal position ...

Now that I'd like to see.