Problem Display
PID: 243515 (2n2K2/1r3p1k/2PP1pN1/5Pp1/6N1/2b5/Q2P4/1R5B w - - 0 1)

Burda, Josef

Sachove umeni (Ceskoslovensky sach), 1974

2n2K2/1r3p1k/2PP1pN1/5Pp1/6N1/2b5/Q2P4/1R5B

#2

10 + 7


15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Sets
    • 1...Rxb1
      • 2.Qxf7#
    • 1...Rb2
      • 2.Qxf7#
    • 1...Rb4
      • 2.Qxf7#
    • 1...Rb5
      • 2.Qxf7#
    • 1...Rb6
      • 2.Qxf7#
    • 1...Rb8
      • 2.Qxf7#
    • 1...Se7
      • 2.Qxf7#
    • 1...fxg6
      • 2.Qg8#
  • Tries
    • 1.Bg2?
      • threat
        • 2.Rh1#
      • 1...Rxb1
        • 2.Qxf7#
      • 1...Be5!
    • 1.Bf3?
      • threat
        • 2.Rh1#
      • 1...Rxb1
        • 2.Qxf7#
      • 1...Be5!
    • 1.Be4?
      • threat
        • 2.Rh1#
      • 1...Rxb1
        • 2.Qxf7#
      • 1...Be5!
    • 1.Rxb7?
      • threat
        • 2.Rxf7#
        • 2.Qxf7#
      • 1...Se7
        • 2.Qxf7#
      • 1...Sxd6!
    • 1.cxb7?
      • threat
        • 2.Qxf7#
      • 1...fxg6
        • 2.Qg8#
      • 1...Sxd6!
  • Keys
    • 1.dxc3!
      • threat
        • 2.Qh2#
      • 1...Rb2
        • 2.Qxf7#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(d);N_GUARD,XR(A)::QAR2(C),XP(e)
    • R(d);N_GUARD::QAR2(C),XP(e)
    • S(g);S_CUTR(d)::QAR2(C),XP(e)
    • P(e);OGATE,XS(I)::QAB1(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • R(A)
      • Vars
        • R(d);N_GUARD,XR(A)::QAR2(C),XP(e)
      • Refutation
        • B(a);
    • Try
      • B(B);
      • Threat
        • R(A)
      • Vars
        • R(d);N_GUARD,XR(A)::QAR2(C),XP(e)
      • Refutation
        • B(a);
    • Try
      • B(B);
      • Threat
        • R(A)
      • Vars
        • R(d);N_GUARD,XR(A)::QAR2(C),XP(e)
      • Refutation
        • B(a);
    • Try
      • R(A);P_PINP(e),XR(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(g);N_SPINP(e)::QAR2(C),XP(e)
      • Refutation
        • S(g);XP(H)
    • Try
      • P(G);XR(d)
      • Threat
        • QAR2(C),XP(e)
      • Vars
        • P(e);OGATE,XS(I)::QAB1(C)
      • Refutation
        • S(g);XP(H)
  • Actual
    • P(D);XB(a)
    • Threat
      • QAR(C)
    • Vars
      • R(d);N_GUARD::QAR2(C),XP(e)


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).