Chess diary

18 October 2026

22 games at 3+0. 5 won, 16 lost, 1 drawn. The engine flagged 33 blunders and 39 further mistakes.

A blunder is a move after which the engine evaluation drops by three pawns or more. A mistake is a drop of one and a half to three pawns. Times are UTC.

Sessions

The day is split into parts (by time control, or by when the games ended on a long day), so the course of the day is visible.
SessionGames endedGamesWon and lostBlunders per gameMistakes per gameLost from +3.0
Morning06:08 to 07:3942−21.253.000
Afternoon15:53 to 16:0132−12.001.000
Evening18:32 to 21:59151−131.471.605

Key positions

4 positions from the day. Use the buttons under each board: test yourself first, then see what happened and the better move, or open the whole game up to that point. The red arrow is the move that was played.

Morning

4 games, 2 won and 2 lost. 1.25 blunders per game.

Afternoon

3 games, 2 won and 1 lost. 2.00 blunders per game.

Evening

15 games, 1 won and 13 lost. 1.47 blunders per game.

A bishop on e3 with one defender

Hanging pieces and moved defenders 25...Be3?? Black, game lost Opponent rated 1127

Clock: this move took 6.1 s, and 54.2 s were left after it.

At move 25 Black was clearly ahead (+4.9). 25...Be3 put the bishop where the pawn on f2 and the queen on b3 attacked it, and only the queen on d2 defended it. The engine's reply 26.Rad1 attacks that queen, and the bishop loses its defender when the queen moves (−5.3).

White played 26.Nh1 and missed it, so Black was ahead again, but the game was later lost on time. 25...Be3 took 6.1 seconds; Black had 54.2 seconds left against White's 105.9 in this 3+0 game. 25...Rc3 keeps the lead (+4.9).

Count attackers and defenders of the square before putting a piece there. A piece defended only by the queen falls when the queen is chased.

The bishop was the only guard of g7

Hanging pieces and moved defenders 6...Be7?? Black, game lost Opponent rated 1128

Clock: this move took 13.3 s, and 2:36 were left after it.

At move 6 the white queen on d4 aimed at the pawn on g7, and the bishop on f8 was its only defender. 6...Be7 moved that defender away, and 7.Qxg7 followed (−8.5). From g7 the queen attacked the rook on h8 and, together with the bishop on c4, the pawn on f7.

The game ended at once with 7...Bf6 8.Qxf7#. 6...Be6 keeps the position playable (−0.8). The bishop move took 13.3 seconds, with 156.8 seconds left.

Before moving a piece, ask what it is guarding. A bishop on f8 often guards g7 against a queen on the long diagonal.

The rook on e7 was attacked twice in a row

Hanging pieces and moved defenders 25.c3?? White, game lost Opponent rated 1040

Clock: this move took 9.2 s, and 1:22 were left after it.

At move 25 White was clearly ahead (+4.6), but the knight that had just arrived on f5 attacked the rook on e7. 25.c3 left the rook there, and the engine gives 25...Nxe7 with −6.4. 25.Rd7 moves the rook to safety and keeps the advantage (+4.6).

Black answered 25...Rf8 and missed the capture. 26.g4 then left the rook on e7 again; the engine rates that position at −6.2, and this time 26...Nxe7 followed. After 27.Bxe7 Re8 the game ended by resignation. The two moves took 9.2 and 3.9 seconds, with 82.0 and 78.1 seconds left in this 3+0 game.

After every opponent move, ask what it attacks. A threat that was not carried out is still there on the next move.

A pawn fork on e5 was skipped

Forks and pins 7.O-O?? White, game lost Opponent rated 987

Clock: this move took 1.3 s, and 2:36 were left after it.

At move 7 the black knight on f6 and bishop on d6 both stood on the sixth rank, two squares apart, and 7.e5 attacks both. The pawn on e5 is defended by the knight on f3 and the bishop on b2, and after Black's best reply 7...Be7 the line 8.exf6 Bxf6 wins a piece for a pawn (+4.4).

7.O-O was played instead (−0.5), and 7...Bb8 took the bishop off d6, so the fork was gone. Castling took 1.3 seconds by the clock readings.

When two enemy pieces stand on the same rank two squares apart, look for a pawn push between them that attacks both.

All games

Every game of the day in the order played. Peak is the best evaluation the author had during the game.
#SessionColourOpponentResultMovesBlundersMistakesPeakSeconds per moveFeatured
1MorningWhite1132Lost by resignation3705+2.64.5
2MorningBlack1055Lost by resignation810+1.23.2
3MorningWhite1008Won by the clock4547+5.03.7
4MorningBlack1131Won by other1700+5.63.7
5AfternoonWhite1101Lost by resignation1640+1.13.7
6AfternoonBlack1042Won by checkmate1900mate4.1
7AfternoonWhite1086Won by checkmate5123mate3.2
8EveningBlack1108Won by resignation3102+7.03.6
9EveningBlack1127Lost by the clock2912+3.05.625...Be3
10EveningWhite1118Drawn by other1330+6.42.5
11EveningWhite1125Lost by resignation3812+5.64.1
12EveningBlack1128Lost by checkmate720+0.13.86...Be7
13EveningBlack1099Lost by resignation1701+0.24.0
14EveningBlack1065Lost by resignation3502+0.14.3
15EveningWhite1040Lost by resignation2722+4.33.925.c3
16EveningWhite1020Lost by the clock2810+0.55.8
17EveningWhite1019Lost by the clock3312+1.35.3
18EveningBlack1013Lost by the clock3522+1.74.6
19EveningWhite987Lost by the clock2621+3.66.37.O-O
20EveningBlack969Lost by resignation3213+1.14.8
21EveningWhite977Lost by resignation2653+3.74.7
22EveningBlack938Lost by resignation2312+1.66.3

Losses on time

5 of the 16 losses ended on the clock. When the clock ran out the engine rated these positions at +0.9, −5.1, −3.8, −4.6, −3.6 for the author. A rating below −3.0 means the game was already lost on the board; 1 of them was not. The Clock page shows how time use relates to blunders.