knight work charlie keen. one move * * n * * edge effects 1 n * * n * * * n

Knight Work

Charlie Keen

One move

* * * * N * * * *

Edge effects 1

N * * * * * N * * * * N

Edge effects 2

* * * N * * * * * * N *

Coverage

2 3 4 4 4 4 3 2 3 4 6 6 6 6 4 3 4 6 8 8 8 8 6 4 4 6 8 8 8 8 6 4 4 6 8 8 8 8 6 4 4 6 8 8 8 8 6 4 3 4 6 6 6 6 4 3 2 3 4 4 4 4 3 2

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2 moves: short pattern 1

2 * * N

Coverage

2 2 N 2 2

2 moves: short pattern 2

* 2 N * 2 N

*

Coverage and impediments

2 2 N 2 2 * 4 N

2 moves short pattern 3

* 2 N *

Coverage

2 2 2 2 N 2 2 2 2

Octomino

N

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Zukertort - Englisch london (4), 18831.Qb5 Qxb5 2.c8Q+ Kf7 3.Qxe6+ Kxe6 4.Nc7+ Kd7 5.Nxb5 1-0

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W #3 - B 1500 [Bonus Socius]1.Ng4+ Kh1 2.Kf1 h2 3.Nf2# 1-0

2 moves long pattern 1

* N 2 *

Coverage

N 2 2

2 moves long pattern 2

N * * 2

Coverage

2 2 N 2 2

2 moves long pattern 3

N * 2

NB just 1 transfer square

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chernev-reinfeld 19491.Nd5 Qe6 2.Qxe4 Qxe4 3.Nf6+ 1-0

Coverage

2 N 2 2 2

All squares reachable in 2 moves

2 2 2 2 2 2 2 2 2 2 2 N 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2

3 moves

N 3 3

Coverage

3 3 3 3 3 1 1 3 1 3 1 3 3 3 N 3 3 1 3 1 3 3 1 1 3 3 3 3 3 3 3 3 3

4 moves

4 4 N 4 4 4

Access from d5

2 3 2 3 2 3 2 3 3 4 1 2 1 4 3 2 2 1 2 3 2 1 2 3 3 2 3 N 3 2 3 2 2 1 2 3 2 1 2 3 3 4 1 2 1 4 3 2 2 3 2 3 2 3 2 3 3 2 3 2 3 2 3 4

Board access from b1

4 5 4 5 4 5 4 5 3 4 3 4 3 4 5 4 4 3 4 3 4 3 4 5 3 2 3 2 3 4 3 4 2 3 2 3 2 3 4 3 1 2 1 4 3 2 3 4 2 3 2 1 2 3 4 3 3 N 3 2 3 2 3 4

Board access from a1

5 4 5 4 5 4 5 6 4 3 4 3 4 5 4 5 3 4 3 4 3 4 5 4 2 3 2 3 4 3 4 5 3 2 3 2 3 4 3 4 2 1 4 3 2 3 4 5 3 4 1 2 3 4 3 4 N 3 2 3 2 3 4 5

Access to anywhere in 4 moves

* * * * * * * * * * * * * * * * * * * * * * * *

Forks

* * * * N * * * *

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1...Nh4

Knight Studies

DR

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No 103 [Carvajal 1889]1.Kc1 a3 2.Nc2+ Ka2 3.Nd4 Ka1 4.Kc2 Ka2 [4...a2 5.Nb3#] 5.Ne2 Ka1 6.Nc1 a2 7.Nb3# Line

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No 114 [Cheron 1952]1.Ng7+ Nxg7 [1...Kf7 2.Nxf5 Kf6 3.h6+-] 2.h6 Kf7 3.h7+- [3.hxg7 Kxg7=]

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1942 [Rinck]1.Ne7 Nd7 2.Nd5 b4 3.g7 +-

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knight fork study - chekhoverWhite combines threats of skewers and forks to win the Queen. 1.Ne5+ Ke3 [1...Kf5 2.Qh3+! Ke4 (2...Kf6 3.Nd7+) 3.Qf3+ Kd4 4.Nc6+; 1...Kf4 2.Qf3+ Kg5] 2.Qe1+ Kf4 3.Qf2+ Kg5 4.Qg3+ Kf5 5.Qg4+ Kxe5 6.Qg3+ Kf5 7.Qxb8 1-0

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Shamkovich (from Spanier)White to play and draw

Knight Tours

DR

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Fischer,R - Ibrahimoglu,I [A07] Siegen Olympiad, 1970 [Emms]18.Nb1! Qb7 19.Nc3 Nc7 20.Nb5 Qc6 21.Nxc7 Qxc7 22.Qb5 Ra8 23.c3 Rxa1 24.Rxa1 Rb8 25.Ra6 Bf8 26.Bf1! White's domination of the light squares remain. This bishop may be redeployed actively on c4 or b5. 1-0

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Richardson - Sadler 19951...Ne8! 2.Be1 Nc7 3.Rc1 Ne6 4.Qc2 [4.Bf2 Nf4 5.Qc2 Qxc2 6.Rxc2 Bxc3 7.bxc3 Rd1+ 8.Be1 Rxe1+] 4...Qb6+ 5.Qf2 [5.Bf2 Nd4 6.Bxd4 (6.Qb1 Bxc3 7.bxc3 Ne2+ 8.Kf1 Qa6) 6...exd4 7.Nd1 d3+ 8.Qf2 Qb3 9.Kh1 Qxa4] 5...Nd4 6.Kh1 Qb3 ... 0-1

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Lasker,E - Pillsbury,H [A83] Paris, 190022.Nb1! Rae8 23.Nd2 e5 24.dxe5 Rxe5 25.Nf3 Re3 26.Ng5 Rxg3 27.hxg3 h6 28.Nf7+ Kg7 29.Nd6 Re7 30.Nxb7 ... 1-0