MESON Chess Problem Database

Problem Display
PID: 72847 (8/b1Np4/5Q2/K1k5/8/2pP1p2/p4P2/B7 w - - 0 1)

Makaronets, Leonid

1st HM., Biscan MT, 2006

8/b1Np4/5Q2/K1k5/8/2pP1p2/p4P2/B7

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6+
      • 2.Qxb6#
    • 1...Bb8
      • 2.Qb6#
    • 1...c2
      • 2.Bd4#
    • 1...d5
      • 2.Sa6#
    • 1...d6
      • 2.Qxc3#
  • Tries
    • 1.Qe5+?
      • 1...d5
        • 2.Qxd5#
      • 1...Kc6!
    • 1.Qe6?
      • threat
        • 2.Qd5#
      • 1...Bb6+
        • 2.Qxb6#
      • 1...Kd4
        • 2.Qd5#
        • 2.Qe3#
        • 2.Qd6#
      • 1...d5
        • 2.Qxd5#
      • 1...dxe6!
  • Keys
    • 1.Qa6!
      • 1...Bb6+
        • 2.Qxb6#
      • 1...Kd4
        • 2.Qd6#
      • 1...Bb8
        • 2.Qb6#
      • 1...c2
        • 2.d4#
      • 1...d5
        • 2.Se6#
      • 1...d6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(e);CHECK,N_GUARD::QAB1(E),XB(e)
    • B(e);N_GUARD::QAB1(E)
    • P(b);OGATE::B(A)
    • P(f);SBLOCK::S(F)
    • P(f);SBLOCK::QAR2(E),XP(b)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAR1(E),XP(f)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • B(e);CHECK,N_GUARD::QAB1(E),XB(e)
        • P(f);::QAR1(E),XP(f)
      • Refutation
        • P(f);XQ(E)
  • Actual
    • Q(E);
    • Vars
      • B(e);CHECK,N_GUARD::QAB1(E),XB(e)
      • K(d);P_SPINP(b),S_FLIGHT::QAR2(E)
      • B(e);N_GUARD::QAB1(E)
      • P(b);::P(C)
      • P(f);N_GUARD,SBLOCK::S(F)
      • P(f);SBLOCK::QAR1(E)
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