MESON Chess Problem Database

Problem Display
PID: 17905 (3b4/1N2p3/rp4QK/8/k4p2/3p4/BnN5/8 w - - 0 1)

Mikan, Ilja

4th Prize, Straz lidu, 1951

3b4/1N2p3/rp4QK/8/k4p2/3p4/BnN5/8

#2

5 + 8

5505 Dobrodruzstvi 64 poli 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qe8#
  • Tries
    • 1.Bb3+?
      • 1...Kb5
        • 2.Qe8#
      • 1...Kxb3!
    • 1.Qe4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kb5!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qb3#
      • 1...Kb5
        • 2.Qd7#
      • 1...Sc4
        • 2.Qxc4#
      • 1...b5
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(C)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(C)
      • Refutation
        • K(c);S_FLIGHT,XB(A)
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(C),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(c);S_FLIGHT::QAB(C)
      • S(a);N_GUARD::QAR2(C),XS(a)
      • P(f);P_PINQ(C),SBLOCK::B(A)
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