MESON Chess Problem Database

Problem Display
PID: 34028 (k1K5/8/2P5/1N2N3/7b/8/8/8 w - - 0 1)

van den Berg, Evert Jan

Tijdschrift vd NSB, 1931

k1K5/8/2P5/1N2N3/7b/8/8/8

#5

4 + 2

SOLUTION

  • SOUND
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be1
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bg5
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bf6
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be7
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bd8
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
        • 2.Sf4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be1
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bg5
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bf6
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be7
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bd8
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
      • 1...Be1
        • 2.Sf4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bd2
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bc3
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bb4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Ba5
            • 3.Sd5
              • threat
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
      • 1...Bf2
        • 2.Sb4
          • threat
            • 3.Sd5
              • threat
                • 4.Sdc7#
              • 3...Bg3
                • 4.Sb6#
              • 3...Bb6
                • 4.Sxb6#
          • 2...Be1
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bb6
            • 3.Sd5
              • threat
                • 4.Sxb6#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
        • 2.Sf4
          • threat
            • 3.Sd5
              • threat
                • 4.Sdc7#
              • 3...Bg3
                • 4.Sb6#
              • 3...Bb6
                • 4.Sxb6#
          • 2...Be1
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bb6
            • 3.Sd5
              • threat
                • 4.Sxb6#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
      • 1...Bg3
        • 2.Sb4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
              • 3...Bf2
                • 4.Sdc7#
              • 3...Bc7
                • 4.Sdxc7#
          • 2...Be1
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bc7
            • 3.Sd5
              • threat
                • 4.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
      • 1...Bg5
        • 2.Sb4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bd2
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bf6
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be7
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bd8
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
      • 1...Bf6
        • 2.Sb4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bc3
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bg5
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be7
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bd8
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
        • 2.Sf4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bc3
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bg5
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be7
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bd8
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
      • 1...Be7
        • 2.Sf4
          • threat
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bb4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bg5
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bf6
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bd8
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
      • 1...Bd8
        • 2.Sb4
          • threat
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Ba5
            • 3.Sd5
              • threat
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bg5
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bb6
            • 3.Sd5
              • threat
                • 4.Sxb6#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bf6
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bc7
            • 3.Sd5
              • threat
                • 4.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be7
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
        • 2.Sf4
          • threat
            • 3.Sd5
              • threat
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
          • 2...Bh4
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Ba5
            • 3.Sd5
              • threat
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bg5
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bb6
            • 3.Sd5
              • threat
                • 4.Sxb6#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bf6
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Bc7
            • 3.Sd5
              • threat
                • 4.Sdxc7#
              • 3...Ba5
                • 4.c7
                  • 4...Bxc7
                    • 5.Sdxc7#
                  • 4...Be1
                    • 5.Sb6#
                  • 4...Bd2
                    • 5.Sb6#
                  • 4...Bc3
                    • 5.Sb6#
                  • 4...Bb4
                    • 5.Sb6#
                  • 4...Bb6
                    • 5.Sxb6#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#
          • 2...Be7
            • 3.Sd5
              • threat
                • 4.Sb6#
                • 4.Sdc7#
              • 3...Bd8
                • 4.c7
                  • threat
                    • 5.Sb6#
                  • 4...Bxc7
                    • 5.Sdxc7#

FEATURES

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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).