MESON Chess Problem Database

Problem Display
PID: 47646 (8/Kp1B4/pR1BN3/3k4/4N3/1P1P4/8/2r1nr2 w - - 0 1)

Petite, Efren

Themes-64, 1957

8/Kp1B4/pR1BN3/3k4/4N3/1P1P4/8/2r1nr2

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc3#
    • 1...Rb1
      • 2.Sc3#
    • 1...Rd1
      • 2.Sc3#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rc4
      • 2.bxc4#
    • 1...Rg1
      • 2.Sf6#
    • 1...Rh1
      • 2.Sf6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Sc2
      • 2.Sc3#
    • 1...Sf3
      • 2.Sf6#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Sf6#
        • 2.Rd6#
      • 1...Sxd3
        • 2.Sf6#
      • 1...Rc6
        • 2.Sf6#
      • 1...Rxf4!
    • 1.Rb5+?
      • 1...Rc5
        • 2.Rxc5#
      • 1...axb5!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Rd4#
      • 1...Rc4
        • 2.bxc4#
      • 1...Sc2
        • 2.Sc7#
      • 1...Sf3
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::S(C)
    • R(a);N_GUARD::S(C),XR(a)
    • R(a);OGATE::P(A),XR(a)
    • R(c);N_GUARD::S(C)
    • R(c);N_GUARD::S(C),XR(c)
    • S(b);S_CUTR(a)::S(C)
    • S(b);S_CUTR(c)::S(C)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XP(B)::S(C)
        • R(a);::S(C)
      • Refutation
        • R(c);XB(E)
    • Try
      • R(D);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R1(D),XR(a)
      • Refutation
        • P(e);XR(D)
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • R(a);OGATE::P(A),XR(a)
      • S(b);S_CUTR(a)::S(F)
      • S(b);S_CUTR(c)::S(F)
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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).