MESON Chess Problem Database

Problem Display
PID: 46508 (7k/8/2K4B/8/8/8/1RB3R1/1r6 w - - 0 1)

Pettersen, Otvind

Dagbladet, 1956

7k/8/2K4B/8/8/8/1RB3R1/1r6

#2

5 + 2

4884 154 norske miniatyrproblemer 1974

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rb8#
    • 1...Rc1
      • 2.Rb8#
    • 1...Rg1
      • 2.Rb8#
    • 1...Rh1
      • 2.Rb8#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Be5#
      • 1...Rf1
        • 2.Rb8#
      • 1...Re1!
    • 1.Rf2?
      • threat
        • 2.Rf8#
      • 1...Kg8
        • 2.Rf8#
      • 1...Rf1
        • 2.Rb8#
      • 1...Rg1!
  • Keys
    • 1.Bc1!
      • 1...Rxc1
        • 2.Rb8#
      • 1...Rxb2
        • 2.Bxb2#
      • 1...Ra1
        • 2.Rb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::R(A)
    • R(a);N_GUARD,P_PINB(B)::R(A)
  • Tries
    • Try
      • B(E);
      • Threat
        • B(E)
      • Vars
        • R(a);N_GUARD::R(A)
      • Refutation
        • R(a);
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • K(b);P-FLIGHT::R1(C)
        • R(a);N_GUARD::R(A)
      • Refutation
        • R(a);
  • Actual
    • B(E);
    • Vars
      • R(a);N_GUARD,P_PINB(B),XB(E)::R(A)
      • R(a);OGATE,XR(A)::B(E),XR(a)
      • R(a);N_GUARD::R(A)
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