MESON Chess Problem Database

Problem Display
PID: 176615 (4N3/rQ6/2P1NBp1/p3bk1n/3p1Pn1/1B3Pp1/8/1K6 w - - 0 1)

Touw Hian Bwee

Schach-Echo, 1961

4N3/rQ6/2P1NBp1/p3bk1n/3p1Pn1/1B3Pp1/8/1K6

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.Sxd4#
    • 1...Bxf6
      • 2.Sd6#
    • 1...Sxf4
      • 2.S6g7#
    • 1...Sxf6
      • 2.S8g7#
  • Tries
    • 1.Bc2+?
      • 1...Kxe6
        • 2.Qb3#
      • 1...d3!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qd3#
      • 1...Sgxf6
        • 2.Sd6#
        • 2.Qxe5#
      • 1...Sxf4
        • 2.Sxd4#
      • 1...Shxf6
        • 2.Sd6#
      • 1...Sf2
        • 2.Qxe5#
      • 1...d3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD,SBLOCK,XP(D)::S(F),XP(b)
    • B(e);N_GUARD,SBLOCK,XB(G)::S(I)
    • S(g);N_GUARD,SBLOCK,XP(D)::S(F)
    • S(g);N_GUARD,SBLOCK,XB(G)::S(I)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(F)::QAB(H)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(H);P_PINB(e)
    • Threat
      • QAB(H)
    • Vars
      • S(g);SBLOCK,XP(D)::S(F),XP(b)
      • S(g);SBLOCK,XB(G)::S(I)
      • S(c);N_GUARD::QAR1(H),XB(e)
      • P(b);::QAB(H),XP(b)
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).