MESON Chess Problem Database

Problem Display
PID: 147935 (8/1rp2R2/1n4pq/1N1kB3/3Pp1Bp/b7/2Rp2n1/1K1N1br1 w - - 0 1)

Karlos, R

4th Prize, 64 Shakhmatnoe obozrenie, 1934

8/1rp2R2/1n4pq/1N1kB3/3Pp1Bp/b7/2Rp2n1/1K1N1br1

#2

8 + 13

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Sxc7#
    • 1...Bc1
      • 2.Rc5#
    • 1...Bb2
      • 2.Rc5#
    • 1...Bc5
      • 2.Rxc5#
    • 1...Sf4
      • 2.Se3#
  • Tries
    • 1.Rd7+?
      • 1...Bd6
        • 2.Rc5#
      • 1...Sxd7!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Be6#
      • 1...e3
        • 2.Bf3#
      • 1...Bc4
        • 2.Sc3#
      • 1...Bc5
        • 2.Rxc5#
      • 1...Sf4
        • 2.Se3#
      • 1...Sc4
        • 2.Sc3#
      • 1...c5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(l);N_GUARD::S(F),XP(m)
    • B(e);N_GUARD::R1(C)
    • B(e);N_GUARD::R1(C),XB(e)
    • S(d);N_GUARD,S_CUTQ(k)::S(B)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • B(e);P_SPINB(e)::R1(C)
      • Refutation
        • S(i);P_PINS(F),XR(H)
  • Actual
    • R(H);
    • Threat
      • B(E)
    • Vars
      • P(f);OGATEB::B(E)
      • B(a);P_PINS(B),SBLOCK::S(F)
      • B(e);N_GUARD::R1(C),XB(e)
      • S(d);N_GUARD,S_CUTQ(k)::S(B)
      • S(i);P_PINS(F),SBLOCK::S(B)
      • P(m);N_GUARD,S_CUTB(e)::R1(H)
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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).