MESON Chess Problem Database

Problem Display
PID: 110035 (8/1Q1b1NpK/2n1p3/2b4R/1Pk3B1/1n1r2pR/2P3r1/q2NB3 w - - 0 1)

Castellari, Umberto

L'Illustrazione Italiana, 1930

(First published on Sun Dec 7 1930)

8/1Q1b1NpK/2n1p3/2b4R/1Pk3B1/1n1r2pR/2P3r1/q2NB3

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qa6#
    • 1...Rd4
      • 2.Se3#
    • 1...Bd4
      • 2.Sd6#
      • 2.Qb5#
    • 1...Sbd4
      • 2.Rxc5#
    • 1...Scd4
      • 2.Se5#
  • Tries
    • 1.Qa6+?
      • 1...Kd4
        • 2.Qxd3#
      • 1...Qxa6!
    • 1.Qb5+?
      • 1...Kd4
        • 2.Qxd3#
      • 1...Kxb5!
  • Keys
    • 1.R3h4!
      • threat
        • 2.Bxe6#
      • 1...Kd4
        • 2.Be2#
        • 2.Bf3#
        • 2.Bh3#
        • 2.Bxe6#
      • 1...e5
        • 2.Be6#
      • 1...Qd4
        • 2.Qa6#
      • 1...Rd4
        • 2.Se3#
      • 1...Rd5
        • 2.Be2#
      • 1...Bd4
        • 2.Sd6#
        • 2.Qb5#
      • 1...Sbd4
        • 2.Rxc5#
      • 1...Scd4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD,SBLOCK::QAB(H)
    • R(d);N_GUARD,SBLOCK,S_CUTB(g)::S(A)
    • S(c);N_GUARD,SBLOCK::R1(G),XB(g)
    • S(h);N_GUARD,SBLOCK,S_CUTQ(a)::S(I)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT::QAR1(H),XR(d)
      • Refutation
        • Q(a);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT::QAR1(H),XR(d)
      • Refutation
        • K(f);P_SPINB(g),S_FLIGHT,XQ(H)
  • Actual
    • R(D);
    • Threat
      • R(D)+B(F),DCHECK,XP(i)
    • Vars
      • P(i);::R(D)+B(F),DCHECK
      • Q(a);N_GUARD,SBLOCK::QAB(H)
      • R(d);N_GUARD,SBLOCK,S_CUTB(g)::S(A)
      • R(d);::R(D)+B(F),DCHECK
      • S(c);N_GUARD,SBLOCK::R1(G),XB(g)
      • S(h);N_GUARD,SBLOCK,S_CUTQ(a)::S(I)
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