MESON Chess Problem Database

Problem Display
PID: 71447 (4R3/8/5N2/5p2/Q1K1bk1B/8/3P3n/2b1N3 w - - 0 1)

Dalla Rosa, Pedro

Faria, Oswaldo

Il Due Mosse, 1958

4R3/8/5N2/5p2/Q1K1bk1B/8/3P3n/2b1N3

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3+
      • 2.Kxd3#
    • 1...Bf3
      • 2.Sd3#
    • 1...Bd5+
      • 2.Kxd5#
    • 1...Sf3
      • 2.Sg2#
    • 1...Sg4
      • 2.Sh5#
  • Tries
    • 1.Sd5+?
      • 1...Bxd5+
        • 2.Kxd5#
      • 1...Kg4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sh5#
      • 1...Bd3+
        • 2.Sxd3#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Bxd2
        • 2.Qxd2#
      • 1...Bf3
        • 2.Sd3#
      • 1...Sf3
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(c);CHECK::QAR(C)+K(D),XB(c)
    • B(c);N_GUARD,SBLOCK::S(A)
    • S(b);SBLOCK,S_CUTB(c)::S(A)
    • S(b);SBLOCK::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(c);CHECK,XS(F)::QAR(C)+K(D),XB(c)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • S(F)
    • Vars
      • B(c);CHECK,N_GUARD::S(A),XB(c)
      • B(c);CHECK,N_GUARD::S(F),XB(c)
      • B(a);OGATE,XP(B)::QAB(C),XB(a)
      • B(c);N_GUARD::S(A)
      • S(b);S_CUTB(c)::S(A)
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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).