Allderdice83 has kibitzed 405 times to chessgames   [more...]

May-30-25 D Sedgwick vs Aditya Dhanwani, 2020   Allderdice83: Black is doing better until 20 ... Ne3? (instead, 20 ... Bc6 is fine). Black compounded the error with 21 ... h5? (21 ... Kh8 to answer 22. Qh6 with 22 ... Rg8 was necessary, though White is still winning after 23. Rxc8 Bxc8 24. Bxe3, and not 24 ... dxe3? 25. Rf3 e5 26. f5! ...      May-20-25 B Zuckerman vs R Hartoch, 1968    Allderdice83: I had 17. Bh6, and on any rook move, 18. Be6 to block the queen's defense of g4. After 17 ... Re8, Stockfish has 18. Rxe7!! as the top move at +8.88, but 18. Be6 is the second choice at +5.88. 18 ... fxe6? gets mated on 19. Qg4+, so Black plays 18 ... Qxe6 19. Rxe6 (when 19 ...      May-05-25 G Marco vs R Loman, 1892    Allderdice83: I was studying in-between moves earlier today, and here's a case where Black's in-between move (16 ... Rxd1) gets trumped by White's (17. Bxd1!). Black foolishly tries to get the pawn back, playing right into the game-winning 20. Qe8+ Bf8 (forced) 21. Bb3! Black should now play      Apr-13-25 Romanishin vs Dorfman, 1976    Allderdice83: I thought this was, "Black to move and not lose," and obviously, 17 ... Nxe3 18. Rxd8 Raxd8 jumps out, but Stockfish says this is a big advantage for Black after 19. Ng3 g6 20. Qe2 or Qh3. Black will get the queenside pawns going. White's queen can harass Black's pieces and ...      Apr-12-25 D Lintchevski vs R Mamedov, 2005   Allderdice83: White's doing fine according to Stockfish until 18. Qf2?! That just moves the queen to a passive square for no reason. Even if the a7 pawn were undefended, why would White take it and open up another file against the White king? Stockfish suggests 18. h5 Nf4 19. Bd6 Qc8 20. Qb4      Apr-07-25 Z Frometa Castillo vs L Kristol, 1988    Allderdice83: Aha! A trick puzzle. You just expect a spectacular move like 30. Re8+, but no, it's just the simple 30. Qh5 and mate can't be stopped.      Apr-07-25 W Braakhuis vs J Copie, 2001   Allderdice83: White's doing fine until 14. dxc6? This move violates a basic principle -- make your opponent trade unless there's a good reason to do so. This move just opens up the center where Black is ready to roll. White should continue the attack with 14. h4. 15. Kb1 continues the ...      Apr-06-25 G Milos vs W Sapis, 2000    Allderdice83: It's a strong attack, but maybe not as strong as White thought. 25. Ne4? squanders all of White's advantage -- 25 ... Ng3! 26. Nxg3? Rf8 27. Qb3 Qh2 (-0.8); better is 26. Ng5! Nf5 27. Qxf5! gxf5 28. Nf7+ Kg8 29. Nxh6 Bxh6 30. Kd2 c6 (0.0). In fairness, the move I came up with ...      Apr-04-25 Negi vs S Erenburg, 2005    Allderdice83: ugh -- "textbook winning position"      Apr-03-25 L Barenbaum vs Suetin, 1959    Allderdice83: 37 ... Rxg2+ 38. Kxg2 Qxc6+ is obvious and can be played without further analysis -- it has to lead to a win. After that, I think there are likely multiple winning lines. The line I found was 39. Kh2 Bb7 (threatening Qg2# or Qh1# if the rook leaves the back rank). Now 40. Qd2 ...

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