MESON Chess Problem Database

Problem Display
PID: 204459 (2K2b2/2N1k1p1/1p1p2Pn/3n3P/3P4/4N3/5Q1p/7q w - - 0 1)

Kubbel, Arvid Ivanovich

Shakhmaty, 1925

2K2b2/2N1k1p1/1p1p2Pn/3n3P/3P4/4N3/5Q1p/7q

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sexd5#
    • 1...Qb1
      • 2.Sexd5#
    • 1...Qc1
      • 2.Sxd5#
    • 1...Qd1
      • 2.Sexd5#
    • 1...Qe1
      • 2.Sexd5#
    • 1...Qf1
      • 2.Sexd5#
    • 1...Qg1
      • 2.Sexd5#
    • 1...Sc3
      • 2.Qh4#
    • 1...Sxe3
      • 2.Qh4#
    • 1...Sb4
      • 2.Qh4#
    • 1...Sf4
      • 2.Qh4#
    • 1...Sg4
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...Sg8
      • 2.Qf7#
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sexd5#
      • 1...Kf6
        • 2.Qh4#
      • 1...Sxe3
        • 2.Qh4#
      • 1...Sxc7
        • 2.Sd5#
      • 1...Sc3
        • 2.Sed5#
        • 2.Qh4#
      • 1...Sb4
        • 2.Sed5#
        • 2.Qh4#
      • 1...Sf4
        • 2.Sed5#
        • 2.Qh4#
      • 1...Sf6
        • 2.Sed5#
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(a);N_GUARD::S(B),XS(c)
    • Q(a);N_GUARD,P_PINS(F)::S(B),XS(c)
    • S(c);N_GUARD::QAB(A)
    • S(c);N_GUARD,XS(B)::QAB(A)
    • S(f);N_GUARD::QAR1(A)
    • S(f);N_GUARD::QAR1(A),XS(f)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(B),DCHECK,XS(c)
    • Vars
      • K(g);S_FLIGHT::QAB(A)
      • S(c);N_GUARD,P_SPINS(c),XS(B)::QAB(A)
      • S(c);XS(F)::QAR(A)+S(B),DCHECK
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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).