MESON Chess Problem Database

Problem Display
PID: 246718 (1n6/2p2K2/4B2P/1p2k3/2P1Nn2/2P3P1/5N2/Q7 w - - 0 1)

Shumarin, Vladimir Pavlovich

Moscow Ty., 2005

1n6/2p2K2/4B2P/1p2k3/2P1Nn2/2P3P1/5N2/Q7

#2

9 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.cxb4#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd4#
      • 1...Sxe6
        • 2.Qd5#
      • 1...Se2
        • 2.Qd5#
      • 1...Sd3
        • 2.Qh5#
      • 1...c5
        • 2.Qd6#
      • 1...Sc6!
    • 1.Qh1?
      • threat
        • 2.Sg4#
      • 1...Sg2
        • 2.Qh5#
      • 1...Sxe6!
    • 1.Qa7?
      • threat
        • 2.Qd4#
        • 2.Qxc7#
      • 1...Se2
        • 2.Qc5#
        • 2.Qxc7#
      • 1...Sd5
        • 2.Qd4#
      • 1...Sa6
        • 2.Qd4#
      • 1...Sc6
        • 2.Qxc7#
      • 1...c5
        • 2.Qxb8#
        • 2.Qc7#
      • 1...c6
        • 2.Qd4#
        • 2.Qxb8#
        • 2.Qc7#
      • 1...Sxe6!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sg4#
      • 1...Sxe6
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sc6
        • 2.Qh8#
      • 1...c6
        • 2.Qxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE::QAB(A)+P(C),XP(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD,XB(G)::QAR1(A)
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR(A)
        • P(d);N_GUARD::QAB1(A)
      • Refutation
        • S(e);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • S(a);N_GUARD::QAR(A)
      • Refutation
        • S(a);XB(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(A)
        • S(e);::QAB1(A)
        • S(e);::QAB(A),XP(d)
      • Refutation
        • S(a);XB(G)
  • Actual
    • Q(A);
    • Threat
      • S(B)
    • Vars
      • S(a);N_GUARD,XB(G)::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(e);OGATE::QAB(A)
      • P(d);OGATEB::QAB(A),XS(e)
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).