MESON Chess Problem Database

Problem Display
PID: 268400 (5nr1/pQB5/p1K2p2/R4N2/3PkPbR/3q1p2/5P2/1B1n4 w - - 0 1)

Chicco, Adriano

L'Italia Scacchistica, 1955

5nr1/pQB5/p1K2p2/R4N2/3PkPbR/3q1p2/5P2/1B1n4

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Qxb1#
    • 1...Qc2+
      • 2.Bxc2#
    • 1...Bh3
      • 2.Kd6#
    • 1...Bxf5
      • 2.Kc5#
    • 1...Bh5
      • 2.Kd6#
    • 1...Se6
      • 2.Kd7#
    • 1...Sg6
      • 2.Kd7#
    • 1...Sd7
      • 2.Kxd7#
    • 1...Sh7
      • 2.Kd7#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Bxd3#
        • 2.Qd5#
        • 2.Qxd3#
      • 1...Qc2+
        • 2.Bxc2#
        • 2.Qxc2#
      • 1...Qxb1
        • 2.Qxb1#
      • 1...Bxf5
        • 2.Qd5#
        • 2.Qxd3#
      • 1...Sxf2
        • 2.Qd5#
      • 1...Sb2
        • 2.Qd5#
      • 1...Se3
        • 2.Bxd3#
        • 2.Qxd3#
      • 1...Sc3!
    • 1.Qb5?
      • threat
        • 2.Bxd3#
        • 2.Qxd3#
        • 2.Qd5#
      • 1...Qc2+
        • 2.Bxc2#
      • 1...Qxb1
        • 2.Qxb1#
      • 1...Bxf5
        • 2.Qxd3#
        • 2.Qd5#
      • 1...Sxf2
        • 2.Qd5#
      • 1...Sb2
        • 2.Qd5#
      • 1...Sc3
        • 2.Bxd3#
        • 2.Qxd3#
      • 1...Se3
        • 2.Bxd3#
        • 2.Qxd3#
      • 1...axb5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Sg3#
      • 1...Qc2+
        • 2.Bxc2#
      • 1...Qxb1
        • 2.Qxb1#
      • 1...Bxf5
        • 2.d5#
      • 1...Sxf2
        • 2.Qe1#
      • 1...Bh3
        • 2.Sd6#
      • 1...Bh5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(I),XQ(b)
    • Q(b);CHECK,OGATEB::B(A),XQ(b)
    • B(e);::QAB(I)+K(H)
    • B(e);SBLOCK,XS(G)::QAB(I)+K(H)
    • S(i);::QAB(I)+K(H)
    • S(i);::QAB(I)+K(H),XS(i)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(I),XQ(b)
        • S(a);XP(B)::QAB1(I)
        • S(a);::QAB1(I)
      • Refutation
        • S(a);
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(I),XQ(b)
        • S(a);XP(B)::QAB1(I)
        • S(a);::QAB1(I)
      • Refutation
        • P(f);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • S(G)
    • Vars
      • Q(b);CHECK,OGATEB::B(A),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(I),XQ(b)
      • B(e);SBLOCK,XS(G)::QAR(I)+P(C)
      • S(a);N_GUARD,XP(B)::QAR(I)
      • B(e);::S(G)
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