MESON Chess Problem Database

Problem Display
PID: 267044 (1n2B1b1/bNN5/2r5/8/k4qRr/2QpB3/3R4/2K2n2 w - - 0 1)

Castellari, Umberto

La Settimana Enigmistica, 1933

1n2B1b1/bNN5/2r5/8/k4qRr/2QpB3/3R4/2K2n2

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Ra2#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Ba2
      • 2.Rxa2#
    • 1...Bh7
      • 2.Ra2#
    • 1...Sa6
      • 2.Bxc6#
  • Tries
    • 1.Rxf4+?
      • 1...Bd4
        • 2.Sc5#
      • 1...Bc4
        • 2.Ra2#
      • 1...Rxf4!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qa3#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...Qb4
        • 2.Qxb4#
      • 1...Qc4
        • 2.Ra2#
      • 1...Bb3
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(d);S_CUTB(i)::R(B)
    • B(g);N_GUARD,N_PINQ(C)::S(F),XB(g)
    • B(i);N_GUARD::R(B),XB(i)
    • B(i);N_GUARD::R(B)
    • S(h);N_GUARD::B(H),XR(f)
  • Tries
    • Try
      • R(E);CHECK,XQ(d)
      • Vars
        • B(g);P_SPINB(g)::S(F)
        • B(i);N_PINQ(C),P_SPINB(i)::R(B)
      • Refutation
        • R(e);XR(E)
  • Actual
    • B(D);N_SPINQ(C),P_SPINR(B)
    • Threat
      • QAR1(C)
    • Vars
      • B(g);XB(D)::S(F),XB(g)
      • Q(d);N_GUARD,N_PINR(B)::QAR1(C),XQ(d)
      • Q(d);N_PINR(B),P_PINQ(C)::R(B)
      • B(i);SBLOCK::QAR1(C)
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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).