Problem Display
PID: 172404 (8/8/8/8/8/B4K2/1R1p4/n1kN4 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

8/8/8/8/8/B4K2/1R1p4/n1kN4

#2

4 + 3


6490 yacpdb 2018

SOLUTION


  • SOUND
  • Tries
    • 1.Ra2+?
      • 1...Kb1
        • 2.Sc3#
      • 1...Kxd1!
    • 1.Rxd2+?
      • 1...Kb1
        • 2.Sc3#
      • 1...Kxd2!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Ra2#
      • 1...d1Q+
        • 2.Re2#
      • 1...d1B+
        • 2.Re2#
      • 1...d1S
        • 2.Sa2#
        • 2.Se2#
      • 1...Sc2
        • 2.Rb1#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P-FLIGHT::S(A)
      • Refutation
        • K(b);P-FLIGHT,XS(A)
    • Try
      • R(B);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::S(A)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
  • Actual
    • S(A);
    • Threat
      • B(C)+R(B)
    • Vars
      • P(c);CHECK,OGATE::B(C)+R(B)
      • S(a);SBLOCK::B(C)+R(B),DCHECK


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).