MESON Chess Problem Database

Problem Display
PID: 54475 (2r1rb2/1p3R1b/2k5/PN2Rn2/8/1B1Np3/8/1K6 w - - 0 1)

Sonnenfeld, Felix Alexander

Il Due Mosse, 1957

2r1rb2/1p3R1b/2k5/PN2Rn2/8/1B1Np3/8/1K6

#2

7 + 8

5309 O Mosqueteiro do Rei 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Rxc7#
    • 1...Ra8
      • 2.Rc7#
    • 1...Rb8
      • 2.Rc7#
    • 1...Rcd8
      • 2.Rc7#
    • 1...Bb4
      • 2.Sxb4#
    • 1...Bc5
      • 2.Rxc5#
    • 1...Bd6
      • 2.Sa7#
    • 1...Bh6
      • 2.Sb4#
      • 2.Rc5#
    • 1...Bg7
      • 2.Sb4#
      • 2.Rc5#
    • 1...Sd6
      • 2.Sd4#
      • 2.Sa7#
      • 2.Rc5#
  • Tries
    • 1.Sd4+?
      • 1...Kd6
        • 2.Rd5#
      • 1...Sxd4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Sa7#
      • 1...Bc5
        • 2.Rxc5#
      • 1...Ra8
        • 2.Rc7#
      • 1...Re7
        • 2.Sb4#
      • 1...Be7
        • 2.Se5#
      • 1...Se7
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::R1(G),XR(f)
    • R(f);N_GUARD::R1(G)
    • B(h);N_GUARD::S(C),XB(h)
    • B(h);N_GUARD::R1(F),XB(h)
    • B(h);SBLOCK::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(F)
      • Refutation
        • S(b);P_PINS(C),XS(E)
  • Actual
    • R(F);
    • Threat
      • S(E)
    • Vars
      • B(h);N_GUARD::R1(F),XB(h)
      • R(f);N_GUARD::R1(G)
      • R(g);S_CUTB(h)::S(C)
      • B(h);S_CUTR(g)::S(C)
      • S(b);N_GUARD,P_PINS(C),S_CUTB(h),S_CUTR(g)::R(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).