Tactics
Pin9 test positions · 8 golden puzzlesSkewer1 test position · 11 golden puzzlesFork14 test positions · 10 golden puzzlesAnnihilation3 test positions · 10 golden puzzlesDeflection4 test positions · 8 golden puzzlesDistraction4 test positionsDiscovered Check1 test position · 10 golden puzzlesDouble Check1 test position · 10 golden puzzlesWindmill1 test positionDiscovered Attack8 test positions · 11 golden puzzlesDouble Attack3 test positionsDecoy2 test positions · 8 golden puzzlesX-Ray5 test positions · 10 golden puzzlesIntermediate Move2 test positions · 10 golden puzzlesCounter Threat3 test positionsInterference0 test positions · 9 golden puzzlesBlocking2 test positionsBombardinio0 test positions · not in X-ray CoachClearance4 test positions · 6 golden puzzlesPromotion9 test positions · 11 golden puzzlesUnder Promotion9 test positions · 10 golden puzzlesDestroying2 test positionsCounter Tactics0 test positionsAttacking Pinned Piece6 test positionsCheckmate3 test positionsFavorable Exchange6 test positions · 1 golden puzzleHanging Piece9 test positionsMissed Opportunity0 test positions · not in X-ray CoachPinned Defender9 test positionsPreparatory Move5 test positionsSmothered Mate1 test positionTrapped Piece8 test positionsUnforced Error0 test positions · not in X-ray Coach
Lichess comparison
X-ray Coach concepts
OpeningsHow well you come out of the opening compared to peers at your rating.StrategyQuiet middlegame positions with no forcing move — where several moves are nearly equally good and only the plan separates them.ExchangesTrade judgement: how often you initiate an exchange the engine judges worse for you — when ahead, level, or behind.TacticsSpotting and converting tactical chances when your opponent slips.WWP — Winning Won PositionsHow often you actually convert when you have an advantage.Time ManagementAvoiding time-trouble blunders and using the clock well.BlundersYour own blunder rate vs peers, including which severity tier they fall in.Mental GameRust, fatigue late in a session, and tilt after losses.EndgameHow well you convert different endgame situations — winning, balanced, and saving lost.CalculationDepth and accuracy when forced lines need to be worked out.SLP — Saving Lost PositionsFighting back from worse positions and avoiding early resignations.Decision MakingAvoiding impulse moves, premoves, and missed retreats.Doubled PawnsTwo same-color pawns ending up on the same file.Isolated PawnsA pawn left with no friendly pawn on adjacent files.