MESON Chess Problem Database

Problem Display
PID: 91443 (4N1n1/1p1K4/1b1N4/1p1kB3/1P3Pp1/3r3p/P2Q4/3R1b2 w - - 0 1)

Shankar Ram, Narayanan

Probleemblad, 1984

4N1n1/1p1K4/1b1N4/1p1kB3/1P3Pp1/3r3p/P2Q4/3R1b2

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Sc7#
    • 1...Bf2
      • 2.Sc7#
    • 1...Be3
      • 2.Sc7#
    • 1...Bd4
      • 2.Sc7#
    • 1...Bc5
      • 2.Sc7#
    • 1...Ba7
      • 2.Sc7#
    • 1...Bc7
      • 2.Sxc7#
    • 1...Sf6+
      • 2.Sxf6#
    • 1...Sh6
      • 2.Sf6#
    • 1...Se7
      • 2.Sf6#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qe4#
      • 1...Sf6+
        • 2.Sxf6#
      • 1...Bxe3
        • 2.Sc7#
      • 1...Bg2!
    • 1.Qxd3+?
      • 1...Bd4
        • 2.Sc7#
        • 2.Qe4#
        • 2.Qxd4#
      • 1...Bxd3!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qb3#
      • 1...Sf6+
        • 2.Sxf6#
      • 1...Rxd1
        • 2.Qe4#
      • 1...Rd4
        • 2.Qe4#
      • 1...Rd2
        • 2.Qe4#
      • 1...Bd4
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • B(g);N_GUARD::S(I)
    • B(g);N_GUARD,N_SPINR(b)::S(I)
    • B(g);N_GUARD::S(I),XB(g)
    • S(i);CHECK,N_GUARD::S(I),XS(i)
    • S(i);N_GUARD::S(I)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(i);CHECK,N_GUARD::S(I),XS(i)
        • B(g);N_GUARD,XQ(C)::S(I)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK,XR(b)
      • Refutation
        • B(a);P_SPINB(a),XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • S(i);CHECK,N_GUARD::S(I),XS(i)
      • R(b);N_SPINR(b),OGATE,XR(A)::QAB1(C)
      • R(b);OGATE::QAB1(C)
      • B(g);N_GUARD,N_SPINR(b)::S(I)
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).