MESON Chess Problem Database

Problem Display
PID: 132357 (Kn1B2RN/4p3/p1p1k1b1/5p2/1P1Q1Pn1/2NB4/qp1R4/4r3 w - - 0 1)

Parrinello, Mario

17th Place, 03. WCCT, 1984-1988

Kn1B2RN/4p3/p1p1k1b1/5p2/1P1Q1Pn1/2NB4/qp1R4/4r3

#2

10 + 11

14744 Nuova Antologia dei Problemisti Italiani 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bc4#
    • 1...Qc4
      • 2.Bxc4#
    • 1...Qa1
      • 2.Bc4#
    • 1...Qa3
      • 2.Bc4#
    • 1...Qa4
      • 2.Bc4#
    • 1...Sf2
      • 2.Rxg6#
    • 1...Sh2
      • 2.Rxg6#
    • 1...Se3
      • 2.Rxg6#
    • 1...Sh6
      • 2.Rxg6#
  • Tries
    • 1.Re2+?
      • 1...Se3
        • 2.Rxg6#
      • 1...Se5
        • 2.Rxg6#
      • 1...Rxe2!
    • 1.Qa7?
      • threat
        • 2.Qxe7#
      • 1...Kd6
        • 2.Bc4#
      • 1...Kf6
        • 2.Rxg6#
      • 1...Sd7!
    • 1.Qg7?
      • threat
        • 2.Qxe7#
      • 1...Kd6
        • 2.Bc4#
      • 1...Kd7
        • 2.Bxf5#
      • 1...Bf7!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Bb1#
        • 2.Bf1#
        • 2.Bc2#
        • 2.Be2#
        • 2.Be4#
        • 2.Bxf5#
      • 1...Kf6
        • 2.Rxg6#
      • 1...Kd7
        • 2.Bxf5#
      • 1...Qxc4!
    • 1.Qd6+?
      • 1...Kxd6
        • 2.Bc4#
      • 1...exd6!
    • 1.Qd7+?
      • 1...Kf6
        • 2.Rxg6#
      • 1...Kxd7
        • 2.Bxf5#
      • 1...Sxd7!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxe7#
      • 1...Kf6
        • 2.Rxg6#
      • 1...Kd7
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::B(C)
    • Q(b);N_GUARD::B(C),XQ(b)
    • S(d);N_GUARD::R(I),XB(i)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • S(d);P_SPINS(d)::R(I),XB(i)
      • Refutation
        • R(a);XR(A)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(j)
      • Vars
        • K(h);P-FLIGHT::R(A)+B(C)
        • K(h);P-FLIGHT,P_SPINP(j)::R1(I),XB(i)
      • Refutation
        • S(k);
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(j)
      • Vars
        • K(h);P-FLIGHT::R(A)+B(C)
        • K(h);P_SPINP(j),S_FLIGHT::R(A)+B(C),DCHECK,XP(e)
      • Refutation
        • B(i);
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINP(j)::R1(I),XB(i)
        • K(h);S_FLIGHT::R(A)+B(C),DCHECK,XP(e)
      • Refutation
        • Q(b);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);P-FLIGHT,XQ(E)::R(A)+B(C)
      • Refutation
        • P(j);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINP(j)::R1(I),XB(i)
        • K(h);S_FLIGHT,XQ(E)::R(A)+B(C),DCHECK,XP(e)
      • Refutation
        • S(k);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XP(j)
    • Vars
      • K(h);P-FLIGHT,P_SPINP(j)::R1(I),XB(i)
      • K(h);S_FLIGHT::R(A)+B(C),DCHECK,XP(e)
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