MESON Chess Problem Database

Problem Display
PID: 265295 (6BK/1p1rQ1NR/4p3/2PkrN1R/2p1p3/2b1P3/8/8 w - - 0 1)

Castellari, Umberto

Il Problema, 1931

6BK/1p1rQ1NR/4p3/2PkrN1R/2p1p3/2b1P3/8/8

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qxd6#
    • 1...Rc7
      • 2.Qd6#
  • Tries
    • 1.Qxe6+?
      • 1...Rxe6
        • 2.Sd4#
        • 2.Se7#
      • 1...Kxc5!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Qxd7#
      • 1...Rxf5+
        • 2.Sd4#
      • 1...Rxe6+
        • 2.Sd4#
      • 1...Kc6
        • 2.Qxd7#
      • 1...Rxe7
        • 2.Sxe7#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Rc7
        • 2.Qd6#
      • 1...Rd8
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(h);N_GUARD::QAR1(E),XR(h)
    • R(h);N_GUARD::QAR1(E)
  • Tries
    • Try
      • Q(E);CHECK,XP(f)
      • Refutation
        • K(d);P-FLIGHT,XP(B)
  • Actual
    • S(F);XP(f)
    • Threat
      • QAR2(E),XR(h)
    • Vars
      • R(e);CHECK,N_GUARD,P_SPINR(e),XS(C)::B(H)+S(F)
      • R(e);CHECK,P_SPINR(e),XS(F)::R(D)+S(C)
      • K(d);S_FLIGHT::QAB1(E),XR(h)
      • R(h);XQ(E)::S(C),XR(h)
      • R(h);N_GUARD::QAR1(E),XR(h)
      • R(h);N_GUARD::QAR1(E)
      • R(h);OGATE,P_PINB(H)::QAB(E),XP(g)
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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).