Problem Display
PID: 267042 (6Bn/2pK4/5R2/3Nknp1/4p3/8/6p1/6Q1 w - - 0 1)

Castellari, Umberto

L'Italia Scacchistica, 1959

6Bn/2pK4/5R2/3Nknp1/4p3/8/6p1/6Q1

#2

5 + 7


15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION


  • SOUND
  • Sets
    • 1...Se3
      • 2.Qa1#
    • 1...Sg3
      • 2.Qa1#
    • 1...Sd4
      • 2.Qh2#
    • 1...Sh4
      • 2.Qa1#
    • 1...Sd6
      • 2.Qa1#
    • 1...Sh6
      • 2.Qa1#
    • 1...Se7
      • 2.Qa1#
    • 1...Sg7
      • 2.Qa1#
  • Tries
    • 1.Be6?
      • threat
        • 2.Rxf5#
      • 1...Se3
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...Sd4
        • 2.Qh2#
      • 1...Sh4
        • 2.Qa1#
      • 1...Sd6
        • 2.Qa1#
      • 1...Sh6
        • 2.Qa1#
      • 1...Se7
        • 2.Qa1#
      • 1...Sg7
        • 2.Qa1#
      • 1...e3!
    • 1.Qf2?
      • threat
        • 2.Rxf5#
      • 1...Se3
        • 2.Qb2#
      • 1...Sg3
        • 2.Qb2#
      • 1...Sd4
        • 2.Qg3#
      • 1...Sh4
        • 2.Qb2#
      • 1...Sd6
        • 2.Qb2#
      • 1...Sh6
        • 2.Qb2#
      • 1...Se7
        • 2.Qb2#
      • 1...Sg7
        • 2.Qb2#
      • 1...e3!
    • 1.Qd1?
      • threat
        • 2.Re6#
      • 1...Se3
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...Sh4
        • 2.Qa1#
      • 1...Sd6
        • 2.Qa1#
      • 1...Sh6
        • 2.Qa1#
      • 1...Se7
        • 2.Qa1#
      • 1...Sg7
        • 2.Qa1#
      • 1...Sd4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Re6#
      • 1...Se3
        • 2.Qc3#
      • 1...Sg3
        • 2.Qc3#
      • 1...Sd4
        • 2.Qxc7#
      • 1...Sh4
        • 2.Qc3#
      • 1...Sd6
        • 2.Qc3#
      • 1...Sh6
        • 2.Qc3#
      • 1...Se7
        • 2.Qc3#
      • 1...Sg7
        • 2.Qc3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 8
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD::QAB(A)
    • S(d);N_GUARD,SBLOCK::QAB(A)
  • Tries
    • Try
      • B(E);
      • Threat
        • R1(C),XS(d)
      • Vars
        • S(d);N_GUARD::QAB(A)
        • S(d);N_GUARD,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • R1(C),XS(d)
      • Vars
        • S(d);N_GUARD::QAB(A)
        • S(d);N_GUARD,SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • S(d);N_GUARD::QAB(A)
      • Refutation
        • S(d);
  • Actual
    • Q(A);
    • Threat
      • R1(C)
    • Vars
      • S(d);N_GUARD::QAB(A)
      • S(d);N_GUARD,SBLOCK::QAB(A),XP(f)


Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).