MESON Chess Problem Database

Problem Display
PID: 219355 (K1k5/pp1pB3/qp1P1p2/1N3P2/r3P3/3pRN1B/8/8 w - - 0 1)

Courthiau, Bernard

Die Schwalbe, 1979

K1k5/pp1pB3/qp1P1p2/1N3P2/r3P3/3pRN1B/8/8

#5

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Keys
    • 1.Sd2!
      • threat
        • 2.Rg3
          • threat
            • 3.Rg8#
      • 1...Qxb5
        • 2.Rg3
          • threat
            • 3.Rg8#
          • 2...Qd5
            • 3.exd5
              • threat
                • 4.Rg8#
              • 3...Rg4
                • 4.Rxg4
                  • threat
                    • 5.Rc4#
                    • 5.Rg8#
      • 1...Rxe4
        • 2.Rxe4
          • threat
            • 3.Rc4#
          • 2...Qxb5
            • 3.Bxf6
              • threat
                • 4.Re8#
              • 3...Qe5
                • 4.Rxe5
                  • threat
                    • 5.Re8#
            • 3.Rh4
              • threat
                • 4.Rh8#
              • 3...Qb3
                • 4.Rh8+
                  • 4...Qg8
                    • 5.Rxg8#
                • 4.Sxb3
                  • threat
                    • 5.Rc4#
                    • 5.Rh8#
                • 4.Sc4
                  • threat
                    • 5.Rh8#
                  • 4...Qxc4
                    • 5.Rxc4#
              • 3...Qd5
                • 4.Rh8+
                  • 4...Qg8
                    • 5.Rxg8#
        • 2.Rg3
          • threat
            • 3.Rg8#
          • 2...Rg4
            • 3.Rxg4
              • threat
                • 4.Rc4#
                • 4.Rg8#
              • 3...Qa2
                • 4.Rc4+
                  • 4...Qxc4
                    • 5.Sxa7#
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Bxf6
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                    • 5.Rxc4#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Sb3
                  • threat
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qxb3
                    • 5.Sxa7#
                  • 4...Qg2
                    • 5.Sxa7#
                • 4.Sc4
                  • threat
                    • 5.Rg8#
                  • 4...Qxc4
                    • 5.Sxa7#
                    • 5.Rxc4#
                  • 4...Qg2
                    • 5.Sxa7#
                • 4.Bf1
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                    • 5.Rxc4#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rc4#
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Bg2
                  • threat
                    • 5.Bxb7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qa6
                    • 5.Rc4#
                    • 5.Rg8#
                • 4.Rg1
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rc1#
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg2
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg3
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rh4
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rh8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rh8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                    • 5.Rxc4#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                  • 4...Qa1
                    • 5.Rc4#
                    • 5.Rh8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rc4#
                    • 5.Rh8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rh8#
                  • 4...Qa3
                    • 5.Rh8#
                  • 4...Qa4
                    • 5.Rh8#
                  • 4...Qa5
                    • 5.Rc4#
                    • 5.Rh8#
                  • 4...Qa6
                    • 5.Rc4#
                    • 5.Rh8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg6
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg7
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
      • 1...Ra1
        • 2.Rg3
          • threat
            • 3.Rg8#
          • 2...Qa2
            • 3.Rg7
              • 3...Qb3
                • 4.Sxb3
                  • threat
                    • 5.Rg8#
                  • 4...Rg1
                    • 5.Sxa7#
              • 3...Qc4
                • 4.Sxc4
                  • threat
                    • 5.Rg8#
                  • 4...Rg1
                    • 5.Sxa7#
              • 3...Qd5
                • 4.exd5
                  • threat
                    • 5.Rg8#
                  • 4...Rg1
                    • 5.Sxa7#
              • 3...Qe6
                • 4.fxe6
                  • threat
                    • 5.Rg8#
                    • 5.exd7#
                  • 4...dxe6
                    • 5.Bxe6#
              • 3...Qf7
                • 4.Rxf7
                  • threat
                    • 5.Rf8#
              • 3...Rb1
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Rf7
                  • threat
                    • 5.Rf8#
                  • 4...Qxf7
                    • 5.Sxa7#
              • 3...Rc1
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Rf7
                  • threat
                    • 5.Rf8#
                  • 4...Qxf7
                    • 5.Sxa7#
              • 3...Rd1
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Rf7
                  • threat
                    • 5.Rf8#
                  • 4...Qxf7
                    • 5.Sxa7#
              • 3...Re1
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Rf7
                  • threat
                    • 5.Rf8#
                  • 4...Qxf7
                    • 5.Sxa7#
              • 3...Rf1
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Bxf1
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rf7
                  • threat
                    • 5.Rf8#
                  • 4...Qxf7
                    • 5.Sxa7#
              • 3...Rg1
                • 4.Rxg1
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rc1#
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
              • 3...Rh1
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Rf7
                  • threat
                    • 5.Rf8#
                  • 4...Qxf7
                    • 5.Sxa7#
          • 2...Rg1
            • 3.Rxg1
              • threat
                • 4.Rc1#
                • 4.Rg8#
              • 3...Qa2
                • 4.Rc1+
                  • 4...Qc4
                    • 5.Sxa7#
                    • 5.Rxc4#
                  • 4...Qc2
                    • 5.Sxa7#
                • 4.Rg8+
                  • 4...Qxg8
                    • 5.Sxa7#
                • 4.Bxf6
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rc1#
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Sb3
                  • threat
                    • 5.Rg8#
                  • 4...Qxb3
                    • 5.Sxa7#
                  • 4...Qg2
                    • 5.Sxa7#
                • 4.Sc4
                  • threat
                    • 5.Rg8#
                  • 4...Qxc4
                    • 5.Sxa7#
                  • 4...Qg2
                    • 5.Sxa7#
                • 4.Bf1
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg2
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg3
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg4
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg6
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#
                • 4.Rg7
                  • 4...Qxd2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb1
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qb3
                    • 5.Sxa7#
                  • 4...Qc4
                    • 5.Sxa7#
                  • 4...Qd5
                    • 5.Sxa7#
                  • 4...Qe6
                    • 5.Sxa7#
                  • 4...Qf7
                    • 5.Sxa7#
                  • 4...Qg8
                    • 5.Sxa7#
                    • 5.Rxg8#
                  • 4...Qa1
                    • 5.Rg8#
                  • 4...Qb2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qc2
                    • 5.Sxa7#
                    • 5.Rg8#
                  • 4...Qa3
                    • 5.Rg8#
                  • 4...Qa4
                    • 5.Rg8#
                  • 4...Qa5
                    • 5.Rg8#
                  • 4...Qa6
                    • 5.Rg8#
                  • 4...a5
                    • 5.Sa7#
                  • 4...a6
                    • 5.Sa7#

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).