MESON Chess Problem Database

Problem Display
PID: 253081 (8/8/2Q5/3B2B1/6k1/7N/2K5/8 w - - 0 1)

Niemela, Aki R

Suomen Kuvalehti, 1976

(First published on Fri Dec 17 1976)

8/8/2Q5/3B2B1/6k1/7N/2K5/8

#2

5 + 1

17137 100 ar finlandska miniatyrer (Hannelius) 1984
17138 512 finlandska miniatyrer (Hannelius) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qe6#
    • 1...Kh5
      • 2.Bf3#
  • Tries
    • 1.Bg2?
      • threat
        • 2.Qf3#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kh5
        • 2.Bf3#
      • 1...Kg3!
    • 1.Be6+?
      • 1...Kh5
        • 2.Qe8#
      • 1...Kg3!
    • 1.Qa4+?
      • 1...Kxh3
        • 2.Qh4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kh5
        • 2.Bf7#
      • 1...Kg3!
    • 1.Qd7+?
      • 1...Kh5
        • 2.Bf7#
      • 1...Kg3!
    • 1.Qc4+?
      • 1...Kxh3
        • 2.Qh4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kh5
        • 2.Bf7#
      • 1...Kg3!
    • 1.Qd6?
      • 1...Kf5
        • 2.Qe6#
      • 1...Kh5
        • 2.Bf3#
      • 1...Kxh3!
    • 1.Qe6+?
      • 1...Kh5
        • 2.Bf3#
      • 1...Kg3!
    • 1.Qh6?
      • 1...Kf5
        • 2.Qe6#
      • 1...Kg3!
    • 1.Qc8+?
      • 1...Kh5
        • 2.Bf7#
      • 1...Kg3!
  • Keys
    • 1.Bh1!
      • threat
        • 2.Qf3#
      • 1...Kg3
        • 2.Qg2#
      • 1...Kxh3
        • 2.Qg2#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kh5
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::QAB1(E)
    • K(a);N_GUARD,S_FLIGHT::B(C)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAR1(E)
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAR1(E)
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAR1(E)
      • K(a);N_GUARD,S_FLIGHT,XS(B)::QAB1(E)
      • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • K(a);N_GUARD,S_FLIGHT::B(C)
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