MESON Chess Problem Database

Problem Display
PID: 219235 (8/4bprp/R1p3kN/5N1p/1r3PpP/q1B4Q/1p4R1/1b5K w - - 0 1)

Hannelius, Jan Ingvar

Suomen Shakki, 1946

8/4bprp/R1p3kN/5N1p/1r3PpP/q1B4Q/1p4R1/1b5K

#2

9 + 12

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qxg4+?
      • 1...Bg5
        • 2.Qxg5#
      • 1...hxg4!
  • Keys
    • 1.Rxg4+!
      • 1...Bg5
        • 2.Rxg5#
      • 1...hxg4
        • 2.h5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK,P_PINP(g),XP(e)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR1(D),XB(i)
      • Refutation
        • P(f);N_SPINP(g),P_SPINP(f),XQ(D)
  • Actual
    • R(B);CHECK,P_PINP(g),XP(e)
    • Vars
      • B(i);N_GUARD,P_SPINB(i)::R1(B),XB(i)
      • P(f);OGATE,XR(B)::P(F)
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).