MESON Chess Problem Database

Problem Display
PID: 137222 (4N3/4p3/4p1n1/4k3/K3p3/4B3/8/3R1rR1 w - - 0 1)

Beach, Lennox F

Australasian Chess Magazine, 1920

4N3/4p3/4p1n1/4k3/K3p3/4B3/8/3R1rR1

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Rg5#
    • 1...Rxd1
      • 2.Rg5#
    • 1...Re1
      • 2.Rg5#
    • 1...Sf4
      • 2.Rg5#
  • Tries
    • 1.Rb1?
      • threat
        • 2.Rb5#
      • 1...Kf5
        • 2.Rg5#
      • 1...Rxb1
        • 2.Rg5#
      • 1...Rc1
        • 2.Rg5#
      • 1...Rd1
        • 2.Rg5#
      • 1...Sf4
        • 2.Rg5#
      • 1...Kd5!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Rc5#
      • 1...Kd5
        • 2.Rc5#
      • 1...Kf5
        • 2.Rg5#
      • 1...Rxc1
        • 2.Rg5#
      • 1...Rd1
        • 2.Rg5#
      • 1...Sf4
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::R1(B)
    • R(a);N_GUARD,XR(A)::R(B)
    • R(a);N_GUARD::R(B)
    • S(e);S_CUTR(a)::R(B)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(c);P-FLIGHT::R1(B)
        • R(a);N_GUARD,XR(A)::R(B)
        • R(a);N_GUARD::R(B)
        • S(e);S_CUTR(a)::R(B)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • R(A)
    • Vars
      • K(c);P-FLIGHT::R1(A)
      • K(c);P-FLIGHT::R1(B)
      • R(a);N_GUARD,XR(A)::R(B)
      • R(a);N_GUARD::R(B)
      • S(e);S_CUTR(a)::R(B)
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