MESON Chess Problem Database

Problem Display
PID: 217628 (8/k7/P2p4/1Q6/8/8/2B1K3/7b w - - 0 1)

List, Reto

Mat, 1980

8/k7/P2p4/1Q6/8/8/2B1K3/7b

#5

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Keys
    • 1.Ke3!
      • threat
        • 2.Be4
          • threat
            • 3.Qb7#
          • 2...Bxe4
            • 3.Kxe4
              • threat
                • 4.Qb7#
              • 3...d5+
                • 4.Kxd5
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd4
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf4
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Ke5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
      • 1...Ka8
        • 2.Be4+
          • 2...Bxe4
            • 3.Kxe4
              • threat
                • 4.Qb7#
              • 3...d5+
                • 4.Qxd5+
                  • 4...Ka7
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
                • 4.Kxd5
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kd3
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kd4
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kf4
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Ke5
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kf5
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
        • 2.Bd1
          • threat
            • 3.Bf3+
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
          • 2...Ka7
            • 3.Bf3
              • threat
                • 4.Qb7#
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
          • 2...Bg2
            • 3.Bf3+
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
          • 2...Be4
            • 3.Kxe4
              • threat
                • 4.Qb7#
              • 3...d5+
                • 4.Qxd5+
                  • 4...Ka7
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
                • 4.Kxd5
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kd3
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kd4
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kf4
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Ke5
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Kf5
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
            • 3.Bf3
              • threat
                • 4.Bxe4+
                  • 4...Ka7
                    • 5.Qb7#
                  • 4...d5
                    • 5.Qb7#
              • 3...Ka7
                • 4.Bxe4
                  • 4...d5
                    • 5.Qb7#
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka7
                    • 5.Qb7#
              • 3...Bd5
                • 4.Bxd5+
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Qxd5+
                  • 4...Ka7
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
              • 3...Bc6
                • 4.Bxc6+
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Qxc6+
                  • 4...Ka7
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
        • 2.Qd7
          • threat
            • 3.Qc7
              • threat
                • 4.a7
                  • threat
                    • 5.Qb8#
          • 2...Kb8
            • 3.a7+
              • 3...Ka8
                • 4.Qc7
                  • threat
                    • 5.Qb8#
        • 2.Qb6
          • threat
            • 3.Qc7
              • threat
                • 4.a7
                  • threat
                    • 5.Qb8#
      • 1...Bg2
        • 2.Be4
          • threat
            • 3.Qb7#
          • 2...Bxe4
            • 3.Kxe4
              • threat
                • 4.Qb7#
              • 3...d5+
                • 4.Kxd5
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd4
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf4
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Ke5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
      • 1...Bd5
        • 2.Be4
          • threat
            • 3.Bf3
              • 3...Ka8
                • 4.Bxd5+
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Qxd5+
                  • 4...Ka7
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
              • 3...Be4
                • 4.Bxe4
                  • 4...d5
                    • 5.Qb7#
              • 3...Bc6
                • 4.Bxc6
                  • 4...d5
                    • 5.Qb7#
                • 4.Qxc6
                  • threat
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
              • 3...Ba8
                • 4.Bxa8
                  • threat
                    • 5.Qb7#
                  • 4...Kxa8
                    • 5.Qb7#
          • 2...Bxe4
            • 3.Kxe4
              • threat
                • 4.Qb7#
              • 3...d5+
                • 4.Kxd5
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd4
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf4
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Ke5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
      • 1...Ba8
        • 2.Bd1
          • 2...Bh1
            • 3.Bf3
              • threat
                • 4.Qb7#
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
          • 2...Bg2
            • 3.Bf3
              • threat
                • 4.Qb7#
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
          • 2...Be4
            • 3.Kxe4
              • threat
                • 4.Qb7#
              • 3...d5+
                • 4.Kxd5
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kd4
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf4
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Ke5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
                • 4.Kf5
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
          • 2...Bd5
            • 3.Bf3
              • 3...Ka8
                • 4.Bxd5+
                  • 4...Ka7
                    • 5.Qb7#
                • 4.Qxd5+
                  • 4...Ka7
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
              • 3...Bxf3
                • 4.Kxf3
                  • threat
                    • 5.Qb7#
                  • 4...Ka8
                    • 5.Qb7#
              • 3...Be4
                • 4.Bxe4
                  • 4...d5
                    • 5.Qb7#
              • 3...Bc6
                • 4.Bxc6
                  • 4...d5
                    • 5.Qb7#
                • 4.Qxc6
                  • threat
                    • 5.Qb7#
                  • 4...Kb8
                    • 5.Qb7#
              • 3...Ba8
                • 4.Bxa8
                  • threat
                    • 5.Qb7#
                  • 4...Kxa8
                    • 5.Qb7#
          • 2...d5
            • 3.Kd4
              • 3...Bc6
                • 4.Qxc6
                  • 4...Kb8
                    • 5.Qb7#

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