MESON Chess Problem Database

Problem Display
PID: 266322 (3r4/1B6/N2n3R/q3B3/brkNP3/1p2Q3/8/4n2K w - - 0 1)

Castellari, Umberto

L'Italia Scacchistica, 1951

3r4/1B6/N2n3R/q3B3/brkNP3/1p2Q3/8/4n2K

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Bd5#
    • 1...Qc7
      • 2.Bd5#
    • 1...Qd5
      • 2.Bxd5#
    • 1...Bb5
      • 2.Bd5#
    • 1...Sb5
      • 2.Rc6#
  • Tries
    • 1.Qe2+?
      • 1...Kc3
        • 2.Sb5#
      • 1...Sd3!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sa3#
      • 1...Kxb5
        • 2.Qc5#
      • 1...Qxb5
        • 2.Qd4#
        • 2.Qc3#
      • 1...Rxb5
        • 2.Qd4#
      • 1...Bxb5
        • 2.Bd5#
        • 2.Qd4#
        • 2.Qc3#
      • 1...Sxb5
        • 2.Rc6#
      • 1...Sc2
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_GUARD::B(H)
    • Q(f);N_GUARD,P_PINP(D)::B(H),XQ(f)
    • B(c);S_CUTQ(f)::B(H)
    • S(g);OGATE::R(G)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::B(E)+S(C),DCHECK
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(e);N_GUARD,S_FLIGHT,XS(C)::QAR1(B)
      • R(d);SBLOCK,XS(C)::QAR1(B)
      • S(g);OGATE,SBLOCK,XS(C)::R(G)
      • S(a);N_GUARD::QAB(B)
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