MESON Chess Problem Database

Problem Display
PID: 231732 (8/8/8/8/4RKNp/5B1k/5p2/8 w - - 0 1)

Lindgren, Frithiof

Die Schwalbe, 1929

8/8/8/8/4RKNp/5B1k/5p2/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Be2?
      • threat
        • 2.Bf1#
      • 1...f1Q+
        • 2.Bxf1#
      • 1...f1R+
        • 2.Bxf1#
      • 1...f1S
        • 2.Bxf1#
      • 1...f1B
        • 2.Bxf1#
      • 1...Kg2!
  • Keys
    • 1.Re2!
      • 1...f1Q
        • 2.Rh2#
      • 1...f1S
        • 2.Bg2#
      • 1...f1B
        • 2.Rh2#
      • 1...f1R
        • 2.Rh2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • P(a);CHECK::B(A),XQ(a)
        • P(a);CHECK::B(A),XR(a)
        • P(a);::B(A),XS(a)
        • P(a);::B(A),XB(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • P(a);OGATE,P_PINB(A)::R1(B)
      • P(a);::B(A)
      • P(a);OGATE::R1(B)
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