[Event "Lección 1"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3N4/2p5/8/3q4/3k4/8/3PKP2/R7 w - - 0 1"]

1.Ra4+ Ke5 2.Ra5 $1 c5 $1 3.Rxc5 $3 Qxc5 4.d4+ Qxd4 (4...Kxd4 5.Ne6+) 5.Nc6+   *

[Event "Ejercicio 1"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "6k1/5r1p/3N4/p1p3q1/1pP5/1P6/PQ5P/7K w - - 0 1"]

1.Qh8+ $1 Kxh8 2.Nxf7+   *

[Event "Lección 2"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3r2k1/Rbqnrpbp/1p4p1/1Ppnp1N1/2N5/1Q1PP3/1B2BPPP/5RK1 w - - 0 1"]

1.Nxf7 $1 Rxf7 2.Rxb7 $1 Qxb7 3.Nd6 Qa8 4.Ra1 Qb8 5.Qxd5   *

[Event "Ejercicio 2"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1b4k/1p4pp/p1nR1rq1/4ppN1/2Q5/2P1B3/P1P2PPP/R5K1 w - - 0 1"]

1.Qxc6 $1 Rxd6 2.Qxd6 Qxd6 3.Nf7+   *

[Event "Lección 3"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3r2k1/5p2/5PB1/R3b3/1p1q3p/2p3P1/1r5P/1N2QR1K b - - 0 1"]

1...Rxh2+ $1 (1...hxg3 2.hxg3 Qg4) 2.Kxh2 Bxg3+ 3.Qxg3 hxg3+ 4.Kxg3 fxg6   *

[Event "Ejercicio 3"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3r1k1/pp1n1pp1/2p4p/q2p1P2/3b2n1/1PNP2PP/PB1Q1PB1/3R1RK1 b - - 0 1"]

1...Ne3 $1   *

[Event "Lección 4"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3qrk1/pbp3p1/1pnppn1p/2P2pN1/P2P4/B1P3P1/4PPBP/R2Q1RK1 w - - 0 1"]

1.Nxe6 $1 Qxe6 2.d5 Qe8 3.dxc6 Bxc6 4.Bxc6 Qxc6 5.cxd6 cxd6 6.Bxd6 Rfd8 7.Qb3+ Kh7 8.Be5
  *

[Event "Ejercicio 4"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r4rk1/3qppb1/n1p3p1/pp2P1Np/2nPN3/P5Q1/1PP3PP/2BR1R1K w - - 0 1"]

1.Rxf7 $1 Rxf7 2.e6   *

[Event "Lección 5"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "7R/1k5P/8/2P5/8/8/7r/4K3 w - - 0 1"]

1.c6+ $1 Kc7 (1...Kxc6 2.Rc8+) 2.Ra8 $1 Rxh7 3.Ra7+   *

[Event "Ejercicio 5"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r7/7R/8/8/5R2/4k3/8/4K3 w - - 0 1"]

1.Ra4 $1 Rxa4 2.Rh3+ Kd4 3.Rh4+   *

[Event "Lección 6"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "7k/pp2rRbp/1np1q1p1/3pN3/3P4/2P3QP/PP4PB/6K1 w - - 0 1"]

1.Nxg6+ $1 hxg6 2.Qh4+ Kg8 3.Rxe7   *

[Event "Ejercicio 6"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1b2rk1/2q2ppp/pp1ppn2/2p1N3/5P2/1P1PP1Q1/PBP3PP/R4RK1 w - - 0 1"]

1.Nd7 $1 Nh5 2.Nf6+ $1 Nxf6 3.Bxf6 g6 4.Qg5   *

[Event "Lección 7"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2rq1kr1/bp3p2/p2pb3/5N1p/1P1pB2P/P5P1/2P1QP2/3R1RK1 b - - 0 1"]

1...Bxf5 $1 2.Bxf5 Rxg3+ $1 3.fxg3 d3+ $1   *

[Event "Ejercicio 7"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2kr1b1r/p2b1ppp/2B1p3/2p5/Q3P3/2q5/P3KPPP/1RB4R b - - 0 1"]

1...Qd3+ $3 2.Kxd3 Bxc6+   *

[Event "Lección 8"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1b1qrk1/p4ppp/1p6/2pNb3/5N2/P7/1P4PQ/K1R1R3 w - - 0 1"]

1.Rxe5 $1 Qxe5 2.Ng6 $3 (2.Ng6 Qxh2 3.Nde7#)  *

[Event "Ejercicio 8"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "7k/3r2p1/p6p/1p2qN2/3bP3/3Q4/P5PP/3R3K b - - 0 1"]

1...Bg1 $3   *

[Event "Lección 9"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1rn5/kp1bnppq/p7/8/1R6/P5Q1/1P4BP/K7 w - - 0 1"]

1.Qxb8+ $3 Kxb8 2.Rxb7+ Ka8 3.Rxd7+ Kb8 4.Rb7+ Ka8 5.Rxe7+ Kb8 6.Rb7+ Ka8 7.Rxf7+ Kb8
8.Rb7+ Ka8 9.Rxg7+ Kb8 10.Rxh7   *

[Event "Ejercicio 9"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4nnk1/qbppbpp1/1p2p2p/8/2P5/1P5P/1B4RK/6R1 w - - 0 1"]

1.Rxg7+ Nxg7 2.Rxg7+ Kh8 3.Rxf7+ Kg8 4.Rg7+ Kh8 5.Rxe7+ Kg8 6.Rg7+ Kh8 7.Rxd7+ Kg8
8.Rg7+ Kh8 9.Rxc7+ Kg8 10.Rg7+ Kh8 11.Rxb7+ Kg8 12.Rxa7   *

[Event "Lección 10"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3rnk1/pb3pp1/3pp2p/1q4BQ/1P1P4/4N1R1/P4PPP/4R1K1 w - - 0 1"]

1.Bf6 $3 Qxh5 2.Rxg7+ Kh8 3.Rxf7+ Kg8 4.Rg7+ Kh8 5.Rxb7+ Kg8 6.Rg7+ Kh8 7.Rg5+ Kh7 8.Rxh5
Kg6 9.Rh3 Kxf6 10.Rxh6+   *

[Event "Ejercicio 10"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2nk1r1/pb3q1p/4p3/3p2pQ/3P4/BP6/P4PPP/2R1R1K1 w q - 0 1"]

1.Rc7 $3 Qxh5 2.Re7+ Kf8 3.Rxb7+ Ke8 4.Re7+ Kf8 5.Rxh7+ Ke8 6.Rxh5   *

[Event "Lección 11"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "6rk/7p/Q2R1p2/1p2n3/4b3/1P4NP/P1P2PPK/2q5 b - - 0 1"]

1...Qf1 $3 2.Nxf1 (2.f3 Nxf3+) 2...Rxg2+ 3.Kh1 Rxf2+ 4.Kg1 Rg2+ 5.Kh1 Rxc2+ 6.Kg1 Nf3+
7.Kh1 Ng5+ 8.Kg1 Nxh3# $1   *

[Event "Ejercicio 11"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "b4rrk/2Q1n2p/4p1q1/p3P2R/1b1B4/6NP/1PB2PPK/3R4 b - - 0 1"]

1...Qxh5 $3 2.Nxh5 Rxg2+ 3.Kh1 Rxf2+ 4.Kg1 Rg2+ 5.Kh1 Rxc2+   *

[Event "Lección 12"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1r3rn1/p5bk/b3P2p/q2P1p2/4nP1N/3QB2P/PP4B1/3NRRK1 w - - 0 1"]

1.Qxe4 $3 fxe4 2.Bxe4+ Kh8 3.Ng6+ Kh7 4.Nxf8+ Kh8 5.Ng6+ Kh7 6.Ne5+ Kh8 7.Nf7#   *

[Event "Ejercicio 12"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "5b1k/5pp1/5n2/5B1p/4p2Q/7R/q1r2PP1/6K1 w - - 0 1"]

1.Qxh5+ $3 Nxh5 2.Rxh5+ Kg8 3.Bh7+ Kh8 4.Bxe4+ Kg8 5.Bh7+ Kh8 6.Bxc2+ Kg8 7.Bh7+ Kh8
8.Bb1+ Kg8 9.Bxa2   *

[Event "Lección 13"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4r3/1p4pk/2b2pq1/7p/3B1P2/2P4P/4RQP1/7K b - - 0 1"]

1...Qxg2+ $1 2.Qxg2 Rxe2   *

[Event "Ejercicio 13"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1r2nk1/p2qppbp/1pbp1np1/1B4B1/3P4/P2QPN2/1P3PPP/2R2RK1 w - - 0 1"]

1.Rxc6 Rxc6 2.Bxf6 Bxf6 3.d5   *

[Event "Lección 14"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2qk2r/ppp2pp1/2n1bb1p/3p4/2B4Q/2N2N2/PPP2PPP/2KRR3 w kq - 0 1"]

1.Qh5 Bxc3 $2 (1...Kf8 $1) 2.Rxe6+ $1 Kf8 3.Rxd5 Qc8 4.Rxc6 (4.Rxc6 bxc6 5.Rd8+) 4...g6
5.Rxg6   *

[Event "Ejercicio 14"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2r5/p4p1k/1p1Q2pp/7q/1P3P2/6P1/6KP/3R1B2 b - - 0 1"]

1...Rc2+ 2.Rd2 Qd1 $3   *

[Event "Lección 15"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "5b2/1b3p1k/p4Ppp/1p6/2q4P/P3rNQ1/1PP2RK1/3N4 b - - 0 1"]

1...Rxf3 $1 2.Rxf3 Qe2+ 3.Nf2 (3.Qf2 Bxf3+) 3...Bc5 $1   *

[Event "Ejercicio 15"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "5rk1/q5pp/4p3/r1bp1p2/1p1B1P2/1P1QP3/P4RPP/2R3K1 w - - 0 1"]

1.Rxc5 $1 Rxc5 2.Rc2 Rfc8 3.Qb5 $3 Rxb5 4.Rxc8+ Kf7 5.Bxa7   *

[Event "Lección 16"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "6k1/p1p2r2/1p1p1P1Q/3P4/2P5/5qr1/PP4RP/6RK w - - 0 1"]

1.Qh3 $1 Rfg7 2.Qc8+ Kh7 3.fxg7 Rxg7 4.Qh3 $1 Qxh3 5.Rxg7+ Kh8 6.Rg8+ Kh7 7.R1g7+ Kh6
8.Rh8+   *

[Event "Ejercicio 16"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rnb2r1k/pp2p1bp/2pp1np1/q2P1p2/2P5/1PN2NP1/PB2PPBP/R2Q1RK1 b - - 0 1"]

1...Nxd5 $4 2.cxd5 Bxc3 (2...cxd5 3.Qxd5 Qxd5 4.Nxd5 Bxb2 5.Rab1 Bf6 6.Nc7) 3.Qd2 $3 
 *

[Event "Lección 17"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rn2kb1r/pp2pppp/1np5/4N3/7q/P1N5/1PP1QPPP/R1BR2K1 w kq - 0 1"]

1.Bg5 $3 Qxg5 2.Rd8+ Kxd8 3.Nxf7+   *

[Event "Ejercicio 17"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rn2k2r/pp2nppp/2p3q1/b7/2p1N1B1/P7/1P2QPPP/R1BR2K1 w kq - 0 1"]

1.Bf5 $3 Qxf5 (1...Nxf5 2.Nf6+ Kf8 3.Qe8#) 2.Nd6+   *

[Event "Lección 18"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rn2kb1r/pp2pp1p/2p2p2/8/8/3Q1N2/qPPB1PPP/2KR3R w kq - 0 1"]

1.Qd8+ $3 Kxd8 2.Ba5+ $3 Kc8 (2...Ke8) 3.Rd8#   *

[Event "Ejercicio 18"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3rk2r/pp3p1p/6n1/2Qnp3/8/2Pq4/R3NPPP/2B1K2R b Kk - 0 1"]

1...Qd1+ $3 2.Kxd1 Ne3+ 3.Ke1 Rd1#   *

[Event "Lección 19"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/r7/pp1p1bnk/2pP1RN1/P1P3QP/6P1/1qB2P1K/4r3 w - - 0 1"]

1.Qh5+ $3 Kxh5 (1...Kg7 2.Qh7+ Kf8 3.Qxg6) 2.Nf7+ $1 Kg4 3.Nh6# (3.f3#)  *

[Event "Ejercicio 19"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "6k1/5pb1/1p1N3p/p5p1/5q2/Q6P/PPr5/3RR2K w - - 0 1"]

1.Re8+ Bf8 (1...Kh7 2.Qd3+) 2.Rxf8+ Kxf8 3.Nf5+ Kg8 4.Qf8+ $3 Kxf8 5.Rd8#   *

[Event "Lección 20"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1r6/4kp2/1q1p1p2/3PpP2/3bP2P/QP6/4B3/1K1R4 b - - 0 1"]

1...Ra8 $1   *

[Event "Ejercicio 20"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4r1k1/pp1q1p1p/2p5/3p4/5Q2/1P3PP1/P1P3KP/4R3 w - - 0 1"]

1.Qg4+ $1 Qxg4 2.Rxe8+ Kg7 3.fxg4   *

[Event "Lección 21"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2r3k1/1r2qppp/R1b2n2/1p6/2pBP3/2P2P2/2N2QPP/R5K1 w - - 0 1"]

1.Rxc6 $1 Rxc6 2.Bxf6 $1 gxf6 3.Ra8+ Kg7 4.Qg3+ Kh6 5.Rg8   *

[Event "Ejercicio 21"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2r4/1p1R3p/5p1k/b1B1Pp2/p4P2/P7/1P5P/1K4R1 w - - 0 1"]

1.Bf8+ $3 Rxf8 2.Rd3   *

[Event "Lección 22"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1bq2rk/ppp4p/1n4nQ/3P1p1N/2BP4/8/PPP3PP/4RRK1 w - - 0 1"]

1.d6 $1 Qf8 (1...Nxc4 2.Re7 $1) 2.Re8 $3 Qxh6 (2...Qxe8 3.Nf6 $1) 3.Rxg8#   *

[Event "Ejercicio 22"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "k3q3/p2r3p/P7/8/1Q6/Kp2r3/7P/2RB4 w - - 0 1"]

1.Bf3+ $3 Rxf3 2.Qe4+ Qxe4 3.Rc8#   *

[Event "Lección 23"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "7r/rpk3pp/2p1Rb2/1P1n4/3P2Q1/7P/P4PP1/6K1 w - - 0 1"]

1.Rxf6 $1 gxf6 2.Qg7+   *

[Event "Ejercicio 23"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4brn1/ppp4k/3p3p/3P2P1/2q4P/5B2/PB3Q2/4R1K1 w - - 0 1"]

1.Rxe8 Rxe8 2.Be4+ Qxe4 3.Qf7+   *

[Event "Lección 24"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3rqb2/1pR3pk/1p2n1pp/3p4/3B4/PP5P/1P4P1/4RQK1 w - - 0 1"]

1.Rxe6 $1 Qxe6 2.Qxf8 $3 Rxf8 3.Rxg7+ Kh8 4.Rxg6+   *

[Event "Ejercicio 24"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3r1r2/p1q1npkp/1p1p2p1/2p1b1B1/6N1/2PP2P1/PP2QPbP/R3R1K1 w - - 0 1"]

1.Qxe5+ $3 dxe5 (1...f6 2.Bxf6+ Kf7 3.Nh6+ Ke8 4.Qxe7+ Qxe7 5.Rxe7#) 2.Bf6+ Kg8 3.Nh6#
  *

[Event "Lección 25"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1r5/1p3k1p/pn2pPpB/2q5/1Q6/2P5/P1P3PP/3R1R1K w - - 0 1"]

1.Qxb6 $1 Qxb6 2.Rd7+ Kg8 (2...Ke8 3.Re7+ Kd8 4.Rd1+) 3.f7+ Kh8 4.Bg7+ Kxg7 5.f8=Q#
  *

[Event "Ejercicio 25"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3rrbk1/1q4pp/pp2Pp2/2ppnP1Q/P6N/5R2/1PPB2PP/4R2K w - - 0 1"]

1.Rxe5 $3 fxe5 2.Qxh7+ $1 Kxh7 3.Ng6   *

[Event "Lección 26"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3rk2/p3Rp1p/1qp1bQ2/8/1p1P4/6R1/PP3PPP/6K1 w - - 0 1"]

1.Rd7 $3 Bxd7 2.Qd6+ Re7 3.Qh6+ Ke8 4.Rg8#   *

[Event "Ejercicio 26"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r4r1k/p2p3p/2bN2RP/3q4/3p2Q1/8/P1P2PP1/5RK1 w - - 0 1"]

1.Rg8+ Rxg8 (1...Qxg8 2.Qxd4+) 2.Qxd4+ $3 Qxd4 3.Nf7#   *

[Event "Lección 27"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/5qpb/3K2kp/1R6/4P3/6PP/8 w - - 0 1"]

1.h4+ Kf5 2.g4+ hxg4 3.Rf4+ $3 Bxf4 4.e4#   *

[Event "Ejercicio 27"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r7/6p1/4b1Rp/4q2k/7p/1B6/p1PB2Q1/2K5 w - - 0 1"]

1.Qg4+ $3 Bxg4 2.Rxh6+ $3 gxh6 3.Bf7#   *

[Event "Lección 28"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1kr5/p1pR2pp/2P2p2/8/1N6/KP2p2P/2P2r2/8 w - - 0 1"]

1.Na6+ Ka8 2.Nxc7+ Kb8 (2...Rxc7 3.Rd8+) 3.Na6+ Ka8 4.Rb7 $3   *

[Event "Ejercicio 28"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/2r4k/6rp/p2Q1N2/P2Pp3/3n2P1/1P6/5K2 b - - 0 1"]

1...Rc1+ $1 2.Ke2 (2.Kg2 Nf4+) 2...Nf4+ $3 3.gxf4 Rg2+ 4.Ke3 Re1#   *

[Event "Lección 29"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3r3k/4Qp1p/p3p3/1pR4P/3qb3/P5R1/1P3PP1/6K1 w - - 0 1"]

1.Rd5 $3 (1.Rd5 Rxd5 2.Qf8#) (1.Rd5 Qxd5 2.Qf6#) (1.Rd5 Bxd5 2.Qxd8#) (1.Rd5 exd5 2.Qxd8#)
 *

[Event "Ejercicio 29"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "k1r5/p2Q1p1q/Pp3Rp1/2rb4/8/5N1P/1P4P1/6RK w - - 0 1"]

1.Rc6 $3   *

[Event "Lección 30"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2q4k/pp4r1/2b4r/8/1Q3R1P/1P2PB2/P4P2/3R3K w - - 0 1"]

1.Rf8+ Kh7 2.Be4+ Qf5 $3   *

[Event "Ejercicio 30"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2b2r2/1pn3pk/r7/p3N3/2Q2p1N/7R/Pq4PP/5R1K w - - 0 1"]

1.Qe6 $3 Bxe6 (1...Rxe6 2.Nhg6+ Kg8 3.Rh8#) 2.Nf5+ Kg8 3.Ne7#   *

[Event "Lección 31"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3k4/P2p2P1/1K1P4/p1p1P3/2q5/2Np4/P5bP/8 w - - 0 1"]

1.Nd5 $3 Qxd5 (1...Bxd5 2.g8=Q+ $1 Bxg8 3.a8=Q#) 2.a8=Q+ $1 Qxa8 3.g8=Q#   *

[Event "Ejercicio 31"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3R4/2B5/8/5k2/1b2b3/4K2p/3p4/8 b - - 0 1"]

1...Bd6 $3 2.Rxd6 h2   *

[Event "Lección 32"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/4r2p/2R3p1/k3Np2/n4P2/6P1/4P3/4K3 w - - 0 1"]

1.Rxg6 $1 hxg6 (1...Rxe5 2.fxe5 hxg6 3.e6) 2.Nc6+   *

[Event "Ejercicio 32"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3n1k2/2Q1R3/5Pb1/3q4/8/8/3p2P1/6K1 w - - 0 1"]

1.Re8+ $3 Kxe8 (1...Bxe8 2.Qg7#) 2.Qe7#   *

[Event "Lección 33"]
[Site "?"]
[Date "????.??.??"]
[Round "-"]
[White "?"]
[Black "?"]
[Result "*"]
[FEN "r4rk1/1p3p2/p1b1pQpq/8/1B2P3/2NR4/PPP3PP/1K6 w - - 0 1"]
[SetUp "1"]

1.Nd5 $1 exd5 2.Rh3 Qg7 3.Bc3   *


[Event "Ejercicio 33"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rn1q1r2/4bpk1/p3p3/1pN1N1np/2pP4/4P1Bb/PPQ4P/1B1RK1R1 w - - 0 1"]

1.Nc6 $3 Nxc6 2.Qh7+ $1 Nxh7 3.Be5+ Kh6 4.Bg7#   *

[Event "Lección 34"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/7p/6pk/1P4r1/2P2QBK/4R2P/6r1/6q1 b - - 0 1"]

1...Qf2+ $3 2.Qxf2 Rh5+ $3 3.Bxh5 g5#   *

[Event "Ejercicio 34"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "7k/pp4pp/6rq/8/3Ppr1P/1P2NbP1/P6K/R1B1Q3 b - - 0 1"]

1...Rxh4+ 2.gxh4 Qf4+ 3.Kh3 Bg2+ $1 4.Nxg2 Qg4+ 5.Kh2 Qxg2#   *

[Event "Lección 35"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1n4k1/r5np/1p4pB/p1p5/6P1/2P4P/q3B3/4QRK1 w - - 0 1"]

1.Bc4+ $1 Qxc4 2.Qe8+ Nxe8 3.Rf8#   *

[Event "Ejercicio 35"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2r2r1k/4ppRp/p4n1P/6R1/1pq1pP2/8/PPN5/1K4Q1 w - - 0 1"]

1.Rc5 $3 Qxc5 2.Rxh7+ Nxh7 3.Qg7#   *

[Event "Lección 36"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2rq2k1/pp1bbr1p/2n3p1/3pPp2/nP3P2/P2B1N1Q/1B2N2P/R3K1R1 w Q - 0 1"]

1.e6 $1 Bxe6 2.Rxg6+ Kf8 3.Qh6+ Ke8 4.Rg8+ Rf8 5.Rxf8+ Bxf8 6.Qxe6+ Ne7 7.Bb5+ Rc6 8.Bxa4
Qb6 9.Ne5   *

[Event "Ejercicio 36"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4r1rk/1b1nppbp/p1qp4/2p2PB1/R3P2R/1P6/1PP1B3/3QN2K w - - 0 1"]

1.Bb5 $3 axb5 2.Rxh7+ Kxh7 3.Qh5+   *

[Event "Lección 37"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r6k/1pp3pp/1p1p3r/7n/3PPp1q/1B3P1b/PPPB1P1P/R3Q1RK b - - 0 1"]

1...Bf1 $1 2.Rg2 $1 Bxg2+ 3.Kxg2 Ng3 $1 4.fxg3 Qxh2+ 5.Kf1 fxg3 6.Bxh6 g2   *

[Event "Ejercicio 37"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3r3/3nkp2/q1p1p1p1/p3P1P1/PbpB4/1P5R/2P2Q1P/3RN2K w - - 0 1"]

1.Qf6+ $1 Nxf6 (1...Kf8 2.Rh8+) 2.Bc5+ $3 Bxc5 3.gxf6+ (3.exf6+) 3...Kf8 4.Rh8#   *

[Event "Lección 38"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1b2rk1/2qpbppp/pnp1p3/2P5/3B1P2/3B4/PP4PP/R2Q1RK1 w - - 0 1"]

1.Bxh7+ $1 Kxh7 2.Qh5+ Kg8 3.Bxg7 $1 Kxg7 4.Qg4+ Kh7 5.Rf3 (5.Rf3 Bxc5+ 6.Kh1)  *

[Event "Ejercicio 38"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1bqr1k1/pp3ppp/3b1n2/2pP4/2P1p3/P1P5/1P1N1PPP/RNBQ1RK1 b - - 0 1"]

1...Bxh2+ $1 2.Kxh2 Ng4+ 3.Kg1 (3.Kg3 Qd6+ 4.f4 exf3+ 5.Kxf3 Re3#) 3...Qh4 4.Re1 (4.Nf3
exf3 5.Bf4 fxg2 6.Kxg2 Ne5 $1) 4...Qxf2+ 5.Kh1 Qh4+ 6.Kg1 Qh2+ 7.Kf1 Qh1+ 8.Ke2 Qxg2#
  *

[Event "Lección 39"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1bqr1k1/1p3ppp/p1p1p3/b3P3/2BP4/B2QP3/P5PP/1R3RK1 w - - 0 1"]

1.Rxf7 $3 b5 (1...Kxf7 2.Qxh7) 2.Rbf1 $1 bxc4 $6 (2...g6) 3.Rxg7+ $1 Kxg7 4.Rf7+ Kxf7 5.Qxh7#
  *

[Event "Ejercicio 39"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4rr2/pb1n1p1k/1p2P1pp/2pP4/2P3nq/3B2N1/PB1Q2PP/4RRK1 w - - 0 1"]

1.Rxf7+ $3 Rxf7 2.Bxg6+ Kxg6 3.Qd3+   *

[Event "Lección 40"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1b1r1k1/ppq2ppn/4p3/2b1N2N/8/2P5/PP2QPP1/R1B2RK1 w - - 0 1"]

1.Nxg7 $3 Kxg7 2.Qh5 Bf8 3.Re1 Kg8 4.Re3 Re7 5.Rg3+ Bg7 6.Rxg7+ $3 Kxg7 7.Bh6+ Kh8 8.Rd1 $1
Nf6 9.Bg7+ $3 Kxg7 10.Qg5+ Kh8 11.Qxf6+ Kg8 12.Rd3   *

[Event "Ejercicio 40"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rn2k2r/1b1n1pbp/pq2p1p1/1p4B1/3N3Q/2NB4/PPP3PP/2K1RR2 w kq - 0 1"]

1.Rxe6+ fxe6 2.Qxh7 $3 Rxh7 (2...Bf6 3.Qxh8+) 3.Bxg6#   *

[Event "Lección 41"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rn3rk1/pbppq1pp/1p2pb2/4N2Q/4N3/3B4/PPP2PPP/R3K2R w KQ - 0 1"]

1.Qxh7+ $3 Kxh7 2.Nxf6+ Kh6 (2...Kh8 3.Ng6#) 3.Neg4+ Kg5 4.h4+ Kf4 5.g3+ Kf3 6.Be2+
Kg2 7.Rh2+ Kg1 8.O-O-O#   *

[Event "Ejercicio 41"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/5bpk/8/Np3n1r/1P2Qq2/P4PRP/6RK b - - 0 1"]

1...Rxh2+ $3 2.Kxh2 Qh5+ 3.Kg3 Bh4+ 4.Kxf4 (4.Kh2 Bxf2+) 4...Qf5#   *

[Event "Lección 42"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2q4r/2p4p/kpnp2p1/p2b4/P6Q/1PR2NP1/2P3BP/2K5 w - - 0 1"]

1.Rxc6 $1 Bxc6 2.Qc4+ Kb7 3.Qxc6+ $3 Kxc6 4.Ne5+ Kc5 5.Nd3+ Kd4 6.Kd2 $3   *

[Event "Ejercicio 42"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r7/1bb2p1k/p1n2rpp/1p1q4/1PpP4/P3BNP1/3QBPKP/R3R3 b - - 0 1"]

1...Rxf3 $3 2.Bxf3 Qxf3 3.Kxf3 Nxd4+ 4.Kg4 Bc8+ 5.Kh4 Nf3#   *

[Event "Lección 43"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r4rk1/ppRn1p2/6pb/2P1pq1p/3N4/P1QPn1Pb/1B1NPP1P/4R1KB b - - 0 1"]

1...Qxf2+ $3 2.Kxf2 Ng4+ 3.Kf3 e4+ 4.Kxe4 (4.dxe4 Nge5+) 4...Nf6+ 5.Kf3 Ne5+ 6.Kf2 Nfg4+
7.Kg1 Be3#   *

[Event "Ejercicio 43"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4r3/3k3q/nbb1prRp/pp1p3P/3P4/P2Q4/1P2N1P1/1KRB1N2 w - - 0 1"]

1.Rxc6 $1 Kxc6 2.Qxb5+ $3 Kxb5 3.Ba4+ $1 Kxa4 (3...Kc4 4.b3+ Kd3 5.Bb5+ Ke4 6.Rg4+ Kf5 (6...Rf4
7.Rxf4#) 7.Ne3#) 4.Nc3+ Kb3 5.Nd2#   *

[Event "Lección 44"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3qrk1/3n2bp/3p2p1/3P4/1pP1NP2/1P4P1/P1QRB3/1K5R b - - 0 1"]

1...Rxa2 $1 (1...Rxa2 2.Kxa2 (2.Qxa2 Qxe4+) 2...Qa8+ 3.Kb1 Qa1#)  *

[Event "Ejercicio 44"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/p1Q3pk/1p3r2/8/6Pp/PPR2P1K/8/4q3 b - - 0 1"]

1...Rf7 $3   *

[Event "Lección 45"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1q2r1k1/2p2p2/6pp/2N2b2/R1PN2n1/8/1P4PP/2Q3K1 b - - 0 1"]

1...Qxb2 $1 (1...Qxb2 2.Qd1 Qxd4+ $1)  *

[Event "Ejercicio 45"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4r2k/pp4pp/2qn4/4Qp2/8/2PB1PP1/P1P3KP/4R3 w - - 0 1"]

1.Qxd6 $3   *

[Event "Lección 46"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3rr1k1/1pRbpp2/3q2pp/p3Q3/P5P1/1B2R2P/1P3P2/6K1 w - - 0 1"]

1.Qxd6 exd6 2.Rxd7   *

[Event "Ejercicio 46"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "5k2/1b3pr1/pq1b1Q2/4p3/2R1P2P/8/1N6/1K3R2 w - - 0 1"]

1.Rb4 $3 Qxb4 (1...Qc7 2.Rxb7) 2.Qd8#   *

[Event "Lección 47"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r5k1/pppb3p/2np1n2/8/3PqNpP/3Q2P1/PPP5/R4RK1 w - - 0 1"]

1.Nh5 $1 Qxd3 2.Nxf6+   *

[Event "Ejercicio 47"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2rnk2/5ppp/pp2P3/4P3/3N4/Pb4P1/1P3K1P/2RR4 w - - 0 1"]

1.e7+ $1 Kxe7 2.Nc6+   *

[Event "Lección 48"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2r1k3/1p1bppb1/p2p1np1/q3n1P1/3NP3/2N1BP2/PPPQB3/1K1R3r w - - 0 1"]

1.gxf6 $3 Rxd1+ 2.Nxd1 $1 Qxd2 3.fxg7 $3 Be6 4.g8=Q+ Kd7 5.Qxc8+ $1 Kxc8 6.Bxd2   *

[Event "Ejercicio 48"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r1bqnrk1/p3b1pp/1p2Pp2/4pN2/8/1nN1B3/PPP3PP/R2Q1RK1 w - - 0 1"]

1.Nd5 $3   *

[Event "Lección 49"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "kb1r2r1/pp3Rp1/2pq3p/P3p3/2B1P3/2PP2Pn/1PK2Q2/R5B1 w - - 0 1"]

1.Qb6 $3 (1.Qb6 axb6 2.axb6+ Ba7 3.Rxa7+ Kb8 4.Rfxb7+ Kc8 5.Ba6) 1...Rd7 2.Bc5 $1 Rxf7
3.Bxf7   *

[Event "Lección 49"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3rn1k/3bb2p/p3pp2/qp1p4/3P4/2N1PNB1/PPQ2P1P/2KR2R1 w - - 0 1"]

1.Ne5 $1   *

[Event "Lección 50"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3R1r1k/5q1p/4Qp1b/p1p1nP2/1p6/7P/PPPR2P1/7K w - - 0 1"]

1.R2d7 $3 Qxe6 $2 (1...Nxd7 2.Qxf7 Rxd8 3.Qe7) (1...Qg8 2.Rxf8 Bxf8 3.Rd8 Kg7) 2.fxe6
Nxd7 3.e7 $1 Kg7 4.Rxf8 $1   *

[Event "Ejercicio 50"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "Q7/pp1nkp1p/4p3/3q4/4nB2/P1p5/2P1PbPP/R1K2BNR b - - 0 1"]

1...Be3 $3 2.Bxe3 Nf2 $3 3.Bxf2 Qd2+ 4.Kb1 Qd1+ 5.Ka2 Qxc2#   *

[Event "Lección 51"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2r3k1/1p3p2/pn1P2pp/4p3/6Q1/6B1/1bq2PPP/1R3RK1 w - - 0 1"]

1.Rxb2 $1 Qxb2 2.Qxc8+ $3 Nxc8 3.d7   *

[Event "Ejercicio 51"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "5r1k/pp4p1/2q3Pp/8/4r2Q/1B6/PP6/3R2RK w - - 0 1"]

1.Qxh6+ $1 gxh6 2.g7+ Kh7 3.gxf8=N+ Kh8 4.Rg8#   *

[Event "Lección 52"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "rn2k1nr/ppq2ppp/2p1p1P1/8/3P4/6b1/PPP2PP1/R1BQKB1R w KQkq - 0 1"]

1.Rxh7 $1 Rxh7 2.gxh7 Qa5+ 3.c3 $2 (3.Bd2 $2 Bxf2+ $1 4.Kxf2 Qf5+) 3...Bxf2+ $1 4.Kd2 $1 Be3+
5.Kc2 $1 (5.Kc2 Qf5+ 6.Bd3)  *

[Event "Ejercicio 52"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4rrk1/4Qppp/p2P1n2/1p6/3p4/PB4P1/1PP4q/1K1RR3 w - - 0 1"]

1.Qxf7+ $1 Rxf7 (1...Kh8 2.Rxe8 Rxe8 3.Qxe8+ Nxe8 4.d7) 2.Rxe8+ Nxe8 3.d7 $1   *

[Event "Lección 53"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/5pkp/3q2p1/7P/8/1r3QP1/8/1r3BRK w - - 0 1"]

1.Qa8 $1 Rxg3 2.Rxg3 Qxg3 $2 3.h6+ Kxh6 4.Qf8+ Kg5 5.Qc5+ Kf6 6.Qf5+ $3 Kxf5   *

[Event "Ejercicio 53"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/4P1k1/6p1/1p6/1Pb1Q3/6pq/8/6K1 w - - 0 1"]

1.Qe5+ $1 Kh7 2.Qh8+ $3 Kxh8 3.e8=Q+ Kh7 (3...Kg7 4.Qf8+ Kh7 5.Qh8+ Kxh8) 4.Qh8+ $1 Kxh8
  *

[Event "Lección 54"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "k7/1p2q3/1p6/1P2p3/4b3/1p2P1r1/B6r/K1Q2R2 w - - 0 1"]

1.Rf8+ $1 Ka7 2.Qa3+ $3 Qxa3 3.Ra8+ $1 Kxa8   *

[Event "Ejercicio 54"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "k7/2p1rp1P/KpP2R2/7r/1P6/8/8/8 w - - 0 1"]

1.Rh6 $3 Rxh6 2.h8=Q+ Rxh8 3.b5 $3   *

[Event "Lección 55"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "6R1/5p1p/4pN1k/4P1p1/3qQ3/7P/3r2P1/7K b - - 0 1"]

1...Rd1+ 2.Kh2 Qg1+ 3.Kg3 Rd3+ $3 4.Qxd3 Qe3+ $3 5.Qxe3   *

[Event "Ejercicio 55"]
[Site "?"]
[Date "??.??.??"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "3R4/4Qpk1/4p1p1/7p/7K/5rP1/5P2/2q5 w - - 0 1"]

1.Qf8+ Kf6 2.Qh8+ Kf5 3.g4+ $3 hxg4 4.Rd5+ $3 exd5 5.Qc8+ $3 Qxc8   *





