MESON Chess Problem Database

Problem Display
PID: 199852 (1Qb5/6p1/4p1p1/5kp1/4p1N1/5nK1/8/8 w - - 0 1)

Tomasevic, Milos

Suomen Shakki, 1989

1Qb5/6p1/4p1p1/5kp1/4p1N1/5nK1/8/8

#2

3 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qf8#
    • 1...Bb7
      • 2.Qf8#
    • 1...Bd7
      • 2.Qf8#
    • 1...Se1
      • 2.Qe5#
    • 1...Sg1
      • 2.Qe5#
    • 1...Sd2
      • 2.Qe5#
    • 1...Sh2
      • 2.Qe5#
    • 1...Sd4
      • 2.Qe5#
    • 1...Sh4
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...e3
      • 2.Qb1#
    • 1...e5
      • 2.Qxc8#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qf7#
      • 1...e3
        • 2.Qc2#
      • 1...Se5
        • 2.Qxe5#
      • 1...Bd7!
    • 1.Qb5+?
      • 1...Se5
        • 2.Qxe5#
      • 1...e5!
    • 1.Qxc8?
      • threat
        • 2.Qf8#
      • 1...e3
        • 2.Qc2#
      • 1...Se5!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qf8#
      • 1...e3
        • 2.Qd3#
      • 1...Se5
        • 2.Qxe5#
      • 1...e5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • B(h);OGATE::QAR(C)
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
    • P(b);OGATEB::QAB(C)
    • P(e);OGATEB::QAB(C),XB(h)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • P(b);OGATEB::QAB(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
      • Refutation
        • B(h);
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • Q(C);P_PINP(e),XB(h)
      • Threat
        • QAR(C)
      • Vars
        • P(b);OGATEB::QAB(C)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • P(b);OGATEB::QAB(C)
      • S(a);N_GUARD::QAR1(C),XS(a)
      • P(e);::S(B)
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