Wednesday Workout: April 14, 2021

Hey! Long time, no talk. Are you ready to get to work and start solving?

First up: five mates of increasing length. Then we'll test our hand at five positions of a broadly tactical nature.

Mates:

Varia:

Solutions (also available in downloadable pgn):

[pgn][Event "IV Closed GM Barcelona"] [Site "Barcelona ESP"] [Date "2021.04.05"] [Round "1.5"] [White "Maurizzi, Marc Andria"] [Black "Hernandez, Crist COL"] [Result "0-1"] [ECO "E32"] [WhiteElo "2479"] [BlackElo "2357"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "8/8/p2P2k1/1p3p2/7K/P1Q4P/1P1B2P1/3q3r b - - 0 43"] [PlyCount "1"] [EventDate "2021.04.05"] [EventType "tourn"] [EventRounds "9"] [EventCountry "ESP"] [EventCategory "8"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 43... Qg4# 0-1 [/pgn]

[pgn][Event "Rujna Zora-1 IM 2021"] [Site "Arandjelovac SRB"] [Date "2021.04.07"] [Round "7.1"] [White "Kostic, VG..."] [Black "Singh, Ojasva"] [Result "1-0"] [ECO "B23"] [WhiteElo "2302"] [BlackElo "1933"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "4r3/p4p2/2p2Qpk/3b1R2/6pP/4r3/2P2K2/8 w - - 0 32"] [PlyCount "3"] [EventDate "2021.04.03"] [EventType "tourn"] [EventRounds "9"] [EventCountry "SRB"] [EventCategory "1"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 32. Rh5+ Kxh5 33. Qg5# 1-0 [/pgn]

[pgn][Event "Titled Tuesday 6th Apr"] [Site "chess.com INT"] [Date "2021.04.06"] [Round "1"] [White "Kozin, Y..."] [Black "Nakamura, Hi"] [Result "0-1"] [ECO "B06"] [WhiteElo "2251"] [BlackElo "2736"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "r3r1k1/p4p1p/2p5/3bPpp1/2N5/5q2/PPQ4K/R3RB2 b - - 0 26"] [PlyCount "3"] [EventDate "2021.04.06"] [EventType "swiss (blitz)"] [EventRounds "11"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 26... Qh1+ 27. Kg3 Qh4# 0-1 [/pgn]

[pgn][Event "Rated Blitz game"] [Site "lichess.org"] [Date "2020.12.31"] [Round "?"] [White "NN1"] [Black "NN2"] [Result "1-0"] [ECO "D20"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "2rk1b1r/1pNbpppp/1Q4q1/8/5B2/8/P4PPP/2R2RK1 w - - 0 20"] [PlyCount "5"] [EventDate "2020.??.??"] [EventType "blitz"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 20. Ne6+ Ke8 21. Qd8+ Rxd8 22. Nc7# 1-0 [/pgn]

[pgn][Event "Sergievskiy Mem Rapid"] [Site "Cheboksary RUS"] [Date "2021.04.11"] [Round "10.4"] [White "Volkov, Sergey1"] [Black "Matinian, N..."] [Result "0-1"] [ECO "A42"] [WhiteElo "2557"] [BlackElo "2470"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "8/R1p4r/1p1p4/PP1Pb3/2P5/5p2/4kB2/6K1 b - - 0 52"] [PlyCount "5"] [EventDate "2021.04.09"] [EventType "swiss (rapid)"] [EventRounds "11"] [EventCountry "RUS"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 52... Bh2+ 53. Kh1 Bg3+ 54. Kg1 Bxf2# 0-1 [/pgn]

[pgn][Event "Third Sat Mix 200 2021"] [Site "Novi Sad SRB"] [Date "2021.04.07"] [Round "1.4"] [White "Savitha, Shri B"] [Black "Nikitenko, M...."] [Result "0-1"] [ECO "B31"] [WhiteElo "2261"] [BlackElo "2477"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "5rqk/p5bp/3N2n1/6Q1/b7/B3N3/5PPP/4R1K1 b - - 0 35"] [PlyCount "33"] [EventDate "2021.04.07"] [EventType "swiss"] [EventRounds "10"] [EventCountry "SRB"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 35... Qa2 $1 {[%csl Ga3,Gf2]} 36. Ndf5 $2 (36. Bb4 Qxf2+ 37. Kh1 Bc6) 36... Qxa3 37. Nxg7 Qc3 $1 (37... Kxg7 $2 38. Qa5) 38. Rb1 Qxg7 $19 39. Qa5 Bc6 40. Rc1 Qb2 41. Rf1 Bb5 42. Nd1 Qb3 43. Re1 a6 44. Qa1+ Kg8 45. Ne3 Qf7 46. Ng4 Qg7 47. Qa2+ Kh8 48. h3 h5 49. Ne3 Nf4 50. Rd1 Ne2+ 51. Kh1 Nc3 0-1 [/pgn]

[pgn][Event "Third Sat Mix 200 2021"] [Site "Novi Sad SRB"] [Date "2021.04.07"] [Round "1.8"] [White "Sreyas, Payyappat"] [Black "Drazic, S...."] [Result "0-1"] [ECO "C10"] [WhiteElo "2150"] [BlackElo "2366"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "5rk1/1q3ppp/4p3/3nN3/3P4/Q7/1P3PPP/2R3K1 b - - 0 25"] [PlyCount "17"] [EventDate "2021.04.07"] [EventType "swiss"] [EventRounds "10"] [EventCountry "SRB"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 25... Nf4 $1 {[%csl Ge2,Gg2]} 26. Nc6 Ne2+ 27. Kh1 Nxc1 28. Ne7+ Kh8 29. Ng6+ hxg6 30. Qxf8+ Kh7 31. Qd8 Qe4 32. h3 Ne2 33. Kh2 Qf4+ 0-1 [/pgn]

[pgn][Event "Third Sat Mix 200 2021"] [Site "Novi Sad SRB"] [Date "2021.04.08"] [Round "3.4"] [White "Fernandez, Dani"] [Black "Lazic, Mir"] [Result "1-0"] [ECO "C41"] [WhiteElo "2465"] [BlackElo "2353"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "r3nrk1/1p2bppp/1qppn3/p7/P1Q1P3/1PN2NBP/2P2PP1/3RR1K1 w - - 0 16"] [PlyCount "11"] [EventDate "2021.04.07"] [EventType "swiss"] [EventRounds "10"] [EventCountry "SRB"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 16. Nd5 $1 cxd5 17. exd5 N8c7 (17... Qc7 18. Qxc7 N8xc7 19. dxe6 Nxe6 $18 ) 18. dxe6 Nxe6 19. Rxe6 fxe6 20. Qxe6+ Rf7 21. Ne5 1-0 [/pgn]

[pgn][Event "2nd Charlotte Masters"] [Site "Charlotte USA"] [Date "2021.04.11"] [Round "5.4"] [White "Wang, Tianqi"] [Black "Eckert, D...."] [Result "1-0"] [ECO "C45"] [WhiteElo "2335"] [BlackElo "2162"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "r1b2rk1/1p1pnpp1/ppn2q1p/8/4P3/1NP2N2/PP1Q1PPP/2KR1B1R b - - 0 14"] [PlyCount "80"] [EventDate "2021.04.09"] [EventType "swiss"] [EventRounds "6"] [EventCountry "USA"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 14... d5 $1 15. exd5 (15. Bd3 dxe4 16. Bxe4 Bf5 $11) 15... Rd8 $1 16. c4 b5 (16... Bf5 $5) 17. Qc3 bxc4 (17... Qd6 $1 {wti ...Nc6-b4}) 18. Bxc4 $2 (18. Qxf6 gxf6 19. Bxc4 $16) 18... Qf4+ 19. Kb1 Bf5+ $2 (19... Nxd5 $142 20. Bxd5 Qf5+ 21. Ka1 Rxd5 $17) 20. Ka1 b5 21. dxc6 bxc4 22. Na5 $16 Bd3 23. Qe5 Qxe5 24. Nxe5 Rd5 25. Naxc4 Bxc4 26. Nxc4 Rc5 27. Nb6 Re8 28. Rhe1 Rxc6 29. Nd5 Re6 30. Rxe6 fxe6 31. Nc7 Rc8 32. Nxe6 Rc2 33. Rf1 Nd5 34. Kb1 Re2 35. Nc5 Kf7 36. Nd3 Rd2 37. Ne5+ Kf6 38. Nf3 Re2 39. Ng1 Rd2 40. Kc1 Rd4 41. Ne2 Rc4+ 42. Kd2 Ke5 43. Rc1 Rb4 44. b3 Rb7 45. Rc4 g5 46. g3 Nf6 47. Nc3 g4 48. b4 h5 49. a4 Nd5 50. b5 Rf7 51. Ke2 Rf3 52. Nxd5 Kxd5 53. Rb4 Kc5 54. Re4 1-0 [/pgn]

[pgn][Event "ch-IRI 2021"] [Site "Tehran IRI"] [Date "2021.04.05"] [Round "1.1"] [White "Tabatabaei, M...."] [Black "Hakemi, Arman"] [Result "1-0"] [ECO "A21"] [WhiteElo "2629"] [BlackElo "2316"] [Annotator "Hartmann,John"] [SetUp "1"] [FEN "r1bqnr1k/2p2ppp/1p1p4/pPn2NP1/2P1pP1Q/4P3/PB1PB2P/R4RK1 w - - 0 19"] [PlyCount "9"] [EventDate "2021.04.05"] [EventType "tourn"] [EventRounds "15"] [EventCountry "IRI"] [EventCategory "8"] [SourceTitle "Workout 210414"] [SourceDate "2021.04.14"] [SourceVersion "1"] [SourceVersionDate "2021.04.14"] [SourceQuality "1"] {[#]} 19. Nxg7 $1 Nxg7 20. Qh6 Rg8 21. f5 Bxf5 22. Rxf5 Qe7 23. Rf6 (23. Rf6 { and now the idea is 24. Qxh7+ Kxh7 25. Rh6 mate.}) 1-0 [/pgn]