Casual club player · Grinder
Play chess against Grandma Rosa
Patient grinder. Trades down and wins the endgame.
touch_appTry the opening against Grandma Rosa: it answers with the moves from its own opening book. The full game, with the engine and chat, is in the app.
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You have White. Make your first move.
How Grandma Rosa plays
Patient grinder. Trades down and wins the endgame. Grandma Rosa plays patiently, trades pieces and squeezes you in the endgame.
How strong it is
Grandma Rosa is rated about 1100. Its strength comes from a model of how players at that rating actually err: how far they look ahead and how often they slip, not from a weakened engine.
- 4 ply
- Looks ahead
- 1.4% of moves
- Real mistakes
- −213 centipawns
- Worst normal move
- 18
- Candidate moves weighed
What it plays in the opening
Like a real club player, Grandma Rosa picks opening moves from a human opening book. As White:
1.e460%
1.d425%
1.c45%
1.Nf35%
1.e33%
1.Nc32%
Against 1.e4:
1...e545%
1...c515%
1...d510%
1...e68%
1...c66%
1...Nc66%
1...d65%
1...Nf63%
1...g62%
What Rosa says
Grandma Rosa reacts to your moves while you play. A few of its lines:
“Sit down, dear. Let's have a nice, slow game.”
“Patience wins more games than cleverness, dear.”
“Nf3, lovely move, dear.”
“Now that's what I like to see: Nf3.”
“Oh dear, Nf3. Always check what's hanging before you move.”
How to beat Grandma Rosa
- 1Keep pieces on the board and create imbalances.
- 2Learn basic king and pawn endgames: that's where this bot wins.
- 3Don't drift: make a plan and push your pawn majority.