Résolution de 31 daily puzzles chess.com

Le challenge : résoudre 31 diagrammes du jour en 45 minutes

Première session, inspirée de Daniel Rensch :)

En mode motivé... et fatigué !

Toujours intéressant de voir
comment son propre cerveau réfléchit !

Knight versus 4 pawns

[Event "?"] [Site "?"] [Date "2011.03.08"] [Round "?"] [White "finales de Cavaliers"] [Black "Etude Chekhover 1938"] [Result "*"] [Annotator ",Sylvain"] [SetUp "1"] [FEN "8/8/p4p1p/8/1k6/p5N1/8/K7 b - - 0 1"] *

Chekhover 1938

Black to play. What will be the result ?
(not very difficult but funny)

Very nice study

To start this snowy December, here is a "not so simple not so hard" study of Herbstmann.

[Event "Niv 2"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Etude Herbstmann"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "8/4B1pp/8/pp1PppP1/b3p3/P7/P3KP1P/2k5 w - - 0 1"] [PlyCount "11"] 1. g6 $3 (1. Bb4 Bd1+ 2. Ke1 Bh5 3. d6 Be8) (1. d6 b4) 1... hxg6 2. Bb4 $1 Bd1+ (2... axb4 3. d6 $18) 3. Ke1 Bg4 4. Bd2+ Kc2 5. Bf4 $1 exf4 6. d6 $18 *

White to play and win.

Hint : the first idea doesn't work immediately. The second idea does but you will have to find a third idea for that!

Delightful study of the weekend

Kakovin - 1936

[Event "?"] [Site "?"] [Date "1936.??.??"] [Round "?"] [White "Kakovin"] [Black "?"] [Result "1-0"] [SetUp "1"] [FEN "8/2p5/3prpb1/4k3/4p3/4KP2/4NP2/2R5 w - - 0 1"] [PlyCount "13"] 1. f4+ Kd5 2. f5 $1 Bxf5 (2... Re8 3. fxg6 $18) 3. Nf4+ Ke5 4. Rd1 $1 c6 5. Rd5+ $1 cxd5 6. Nd3+ exd3 7. f4# 1-0

White to play and win. (level medium)

Funny tactic

(2385) vs. (2330)
-

[Event "Athens"] [Site "?"] [Date "1994"] [Round "2"] [White "Kofidis, Andreas"] [Black "Gogolis, Alexandros"] [Result "*"] [SetUp "1"] [FEN "r2q2k1/1p4p1/p1np3p/2b1pr2/6n1/2NQ4/PPP1NPB1/R1B2RK1 w - - 0 15"] [PlyCount "5"] [EventDate "1994.??.??"] *

Black just sacrificed with 14...Rxf5. How should white react?

Crazy computer tactical pattern

[Event "?"] [Site "?"] [Date "2010.??.??"] [Round "?"] [White "NN"] [Black "NN"] [Result "*"] [ECO "?"] [SetUp "1"] [FEN "6k1/pb1q1pp1/1pR1p2p/3r4/Q7/P3PN2/1P2BPPP/6K1 w - - 0 21"] [PlyCount "11"] [EventDate "2010.??.??"] [SourceDate "2000.01.01"] 21. Rc4 b5 22. Ne5 Rxe5 23. Qxa7 Rg5 24. Qb8+ (24. Rg4 Rxg4 25. Bxg4 Qc6) 24... Kh7 25. Rd4 Rxg2+ 26. Kf1 *

White took a knight in c6, Black (thus a piece down) just played Qd7, pinning the rook. After 1.Rc4 b5 The computer says white can stay in the game with the stunning 2.Ne5!! . Try to understand why.

(you can see the answer by clicking one time on the board and then with the right arrow of your keyboard)

The good choice

[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "r2r2k1/p4p1p/1p3Q2/5p2/1bbP4/4R3/PP3PPP/6K1 w - - 0 26"] *

White is on the attack. How to proceed now ?
Allocated time: < 1 min.

Fast calculation

Black to play. How many seconds to find the mate ?

Chess tactic

NN - Sarno,S
1993
Black to play. Do you have this pattern in your mind ?

Chess tactic

Black to play.
(not so easy, not so hard)