MESON Chess Problem Database

Problem Display
PID: 243413 (r6R/RN2k1B1/3pN3/b5nq/8/7B/Kn2Q3/8 w - - 0 1)

Bata, Lorinc

Smena, 1961

r6R/RN2k1B1/3pN3/b5nq/8/7B/Kn2Q3/8

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.Sxg5#
    • 1...Qxh8
      • 2.Sxg5#
    • 1...Re8
      • 2.Sxa5#
    • 1...Sxe6
      • 2.Qxe6#
  • Keys
    • 1.Re8+!
      • 1...Kd7
        • 2.Qb5#
      • 1...Kf7
        • 2.Qxh5#
      • 1...Kxe8
        • 2.Sxd6#
      • 1...Qxe8
        • 2.Sxg5#
      • 1...Rxe8
        • 2.Sxa5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD::QAR(B)+S(D),XS(c)
    • Q(d);N_GUARD,XR(H)::QAR(B)+S(D),XS(c)
    • R(g);N_GUARD::R(E)+S(F),XB(b)
    • S(c);OGATE,P_SPINS(c),XS(D)::QAR1(B),XS(c)
  • Actual
    • R(H);CHECK
    • Vars
      • K(f);P-FLIGHT::QAB(B)
      • K(f);P-FLIGHT::QAB(B),XQ(d)
      • K(f);P-FLIGHT,XR(H)::S(F),XP(e)
      • Q(d);SBLOCK,XR(H)::QAR(B)+S(D),XS(c)
      • R(g);SBLOCK,XR(H)::R(E)+S(F),XB(b)
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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).