MESON Chess Problem Database

Problem Display
PID: 46747 (8/K7/8/1p6/nk5B/3R4/Q7/8 w - - 0 1)

van Dijk, Nils Gustav Gerard

The Problemist, 1968

8/K7/8/1p6/nk5B/3R4/Q7/8

#2

4 + 3

4884 154 norske miniatyrproblemer 1974

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Be7#
    • 1...Sc3
      • 2.Be7#
    • 1...Sc5
      • 2.Be1#
    • 1...Sb6
      • 2.Be7#
  • Tries
    • 1.Be1+?
      • 1...Kc5
        • 2.Qd5#
      • 1...Sc3!
    • 1.Bd8?
      • 1...Sb2
        • 2.Be7#
      • 1...Sc3
        • 2.Be7#
      • 1...Sc5
        • 2.Ba5#
      • 1...Sb6
        • 2.Be7#
      • 1...Kc5!
    • 1.Rd4+?
      • 1...Ka5
        • 2.Bd8#
      • 1...Kc5
        • 2.Qd5#
      • 1...Kc3!
    • 1.Qa3+?
      • 1...Ka5
        • 2.Bd8#
      • 1...Kc4!
  • Keys
    • 1.Rd5!
      • 1...Kc3
        • 2.Be1#
      • 1...Ka5
        • 2.Be1#
      • 1...Sb2
        • 2.Be1#
      • 1...Sc3
        • 2.Be7#
      • 1...Sc5
        • 2.Be1#
      • 1...Sb6
        • 2.Be1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::B(C)
    • S(a);N_GUARD,SBLOCK::B(C)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • B(C);
      • Vars
        • S(a);N_GUARD::B(C)
        • S(a);SBLOCK::B(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::B(C)
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::B(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(b);S_FLIGHT::B(C)
      • K(b);P_SPINP(c),P_SPINS(a),S_FLIGHT::B(C)
      • S(a);N_GUARD::B(C)
      • S(a);N_GUARD,SBLOCK::B(C)
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