MESON Chess Problem Database

Problem Display
PID: 101350 (8/3Nn3/8/p2pN3/Rbpk4/3p1P2/1P1p1P2/1Q1K4 w - - 0 1)

Hartong, Jan

Good Companions, 1920

8/3Nn3/8/p2pN3/Rbpk4/3p1P2/1P1p1P2/1Q1K4

#2

8 + 8

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qxd3#
    • 1...Bc3
      • 2.Qxd3#
    • 1...Bc5
      • 2.Qxd3#
    • 1...Bd6
      • 2.Qxd3#
    • 1...Sf5
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sg6
      • 2.Sc6#
    • 1...Sc8
      • 2.Sc6#
    • 1...Sg8
      • 2.Sc6#
    • 1...c3
      • 2.Qxd3#
  • Tries
    • 1.Qc2?
      • 1...Ba3
        • 2.Qxd3#
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxd3#
        • 2.Qxc3#
        • 2.bxc3#
      • 1...Bc5
        • 2.Qxd3#
        • 2.Qc3#
      • 1...Bd6
        • 2.Qxd3#
        • 2.Qc3#
      • 1...Sf5
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sg6
        • 2.Sc6#
      • 1...Sc8
        • 2.Sc6#
      • 1...Sg8
        • 2.Sc6#
      • 1...c3
        • 2.Qxd3#
        • 2.Qxc3#
        • 2.bxc3#
      • 1...dxc2+!
  • Keys
    • 1.Qa1!
      • 1...Ba3
        • 2.bxa3#
      • 1...Bc3
        • 2.bxc3#
      • 1...Bc5
        • 2.b3#
      • 1...Bd6
        • 2.b3#
      • 1...Sf5
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sg6
        • 2.Sc6#
      • 1...Sc8
        • 2.Sc6#
      • 1...Sg8
        • 2.Sc6#
      • 1...c3
        • 2.bxc3#

This anticipates 6267(1928)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(c);P_SPINP(d)::QAR1(A),XP(b)
    • S(h);N_GUARD::S(G)
    • S(h);N_GUARD::S(G),XS(h)
    • P(d);N_GUARD,P_SPINB(c)::QAR1(A),XP(b)
  • Tries
    • Try
      • Q(A);
      • Vars
        • S(h);N_GUARD::S(G)
        • S(h);N_GUARD::S(G),XS(h)
      • Refutation
        • P(b);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • B(c);OGATE,P_SPINP(d)::QAB(A)+P(C),XB(c)
      • B(c);OGATE,P_SPINP(d)::P(C),XB(c)
      • B(c);N_GUARD,P_SPINP(d)::QAB(A)+P(C)
      • S(h);N_GUARD::S(G)
      • S(h);N_GUARD::S(G),XS(h)
      • P(d);OGATE,P_SPINB(c)::P(C),XP(d)
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).