MESON Chess Problem Database

Problem Display
PID: 121728 (8/8/2n5/5P2/4p2N/Q7/3pk1Kb/5R2 w - - 0 1)

Hellstrom, Ake

Source?, 1935

8/8/2n5/5P2/4p2N/Q7/3pk1Kb/5R2

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qa6#
  • Keys
    • 1.Sf3!
      • 1...exf3+
        • 2.Qxf3#
      • 1...d1Q
        • 2.Rf2#
      • 1...d1S
        • 2.Re1#
      • 1...d1B
        • 2.Re1#
        • 2.Rf2#
      • 1...d1R
        • 2.Rf2#
      • 1...Bg1
        • 2.Sxg1#
      • 1...Bg3
        • 2.Sg1#
      • 1...Bf4
        • 2.Sg1#
      • 1...Be5
        • 2.Sg1#
      • 1...Bd6
        • 2.Sg1#
      • 1...Bc7
        • 2.Sg1#
      • 1...Bb8
        • 2.Sg1#
      • 1...Sb4
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Sa5
        • 2.Sd4#
      • 1...Se5
        • 2.Sd4#
      • 1...Sa7
        • 2.Sd4#
      • 1...Se7
        • 2.Sd4#
      • 1...Sb8
        • 2.Sd4#
      • 1...Sd8
        • 2.Sd4#
      • 1...e3
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 19
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::QAB(C)
  • Actual
    • S(D);
    • Vars
      • P(d);CHECK,OGATE,XS(D)::QAB1(C),XP(d)
      • P(a);SBLOCK::R1(A)
      • P(a);N_GUARD::R1(A)
      • B(c);N_GUARD::S(D),XB(c)
      • B(c);N_GUARD::S(D)
      • S(e);N_GUARD::S(D)
      • S(e);N_GUARD::S(D),XS(e)
      • P(d);SBLOCK::QAB(C)
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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).