MESON Chess Problem Database

Problem Display
PID: 227909 (2K5/8/2N5/1kp4Q/2N5/3R4/8/8 w - - 0 1)

Kazar, Aladar

Ujsag, 1926

2K5/8/2N5/1kp4Q/2N5/3R4/8/8

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qe8#
  • Tries
    • 1.Rb3+?
      • 1...Kxc4
        • 2.Qf7#
      • 1...Ka6
        • 2.Rb6#
      • 1...Kxc6
        • 2.Rb6#
        • 2.Qf3#
        • 2.Qh1#
      • 1...Ka4!
    • 1.Qf7?
      • 1...Ka6
        • 2.Qb7#
      • 1...Kxc6
        • 2.Qe8#
        • 2.Qb7#
        • 2.Qd7#
      • 1...Ka4!
    • 1.Qxc5+?
      • 1...Ka4
        • 2.Sb2#
        • 2.Sb6#
        • 2.Ra3#
        • 2.Qb4#
        • 2.Qa5#
      • 1...Ka6
        • 2.Sb4#
        • 2.Sb8#
        • 2.Ra3#
        • 2.Qb6#
        • 2.Qa5#
      • 1...Kxc5!
  • Keys
    • 1.Qd1!
      • 1...Kxc4
        • 2.Qb3#
      • 1...Ka6
        • 2.Qa4#
      • 1...Kxc6
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(D)::QAB(C)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT,XS(B)::QAB(C)
        • K(a);N_SPINP(b),OGATE,S_FLIGHT::R1(A)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(a);S_FLIGHT,XS(B)::QAB1(C)
      • K(a);S_FLIGHT::QAR2(C)
      • K(a);S_FLIGHT,XS(D)::QAB(C)
HTML5 logo

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).