MESON Chess Problem Database

Problem Display
PID: 196453 (8/1R5n/8/R3B3/2k1BK2/p7/4b3/8 w - - 0 1)

Paalanen, Erkki

Suomen Shakki, 1984

8/1R5n/8/R3B3/2k1BK2/p7/4b3/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Bd5#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Bd5#
      • 1...Bf3
        • 2.Bd3#
      • 1...Sf6!
    • 1.Ra8?
      • threat
        • 2.Rc8#
      • 1...Kc5
        • 2.Rc8#
      • 1...Bg4!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Rc6#
      • 1...Kc5
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::B(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • B(A)
      • Vars
        • B(a);N_GUARD::B(A)
      • Refutation
        • S(d);
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • K(c);P-FLIGHT::R(C)
      • Refutation
        • B(a);
  • Actual
    • R(C);
    • Threat
      • R(C)
    • Vars
      • K(c);P-FLIGHT::R1(C)
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