MESON Chess Problem Database

Problem Display
PID: 273909 (4bq2/1Q6/8/2P1p3/1pk5/1NP5/1nB2b1r/KN1n4 w - - 0 1)

Broers, F

Probleemblad, 1952

4bq2/1Q6/8/2P1p3/1pk5/1NP5/1nB2b1r/KN1n4

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.S3d2#
    • 1...Bxc5
      • 2.Sa5#
    • 1...Sxc3
      • 2.S1d2#
    • 1...bxc3
      • 2.Sa3#
  • Tries
    • 1.Qa6+?
      • 1...Bb5
        • 2.Qe6#
      • 1...Kd5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qxb4#
      • 1...Kxb3
        • 2.Qxb4#
      • 1...Qxc5
        • 2.S3d2#
      • 1...Bxc5
        • 2.Sa5#
      • 1...Sxc3
        • 2.S1d2#
      • 1...bxc3
        • 2.Sa3#
      • 1...Bb5
        • 2.Qd5#
      • 1...Sd3
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(i);SBLOCK,XP(F)::S(D)
    • B(c);SBLOCK,XP(F)::S(D)
    • S(a);SBLOCK,XP(E)::S(B)
    • P(e);N_GUARD,SBLOCK,XP(E)::S(B)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(h);P_SPINB(h),SBLOCK::QAB(G)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAR1(G),XP(e)
    • Vars
      • K(f);P_SPINP(e),S_FLIGHT,XS(D)::QAR1(G),XP(e)
      • Q(i);SBLOCK,XP(F)::S(D)
      • B(c);SBLOCK,XP(F)::S(D)
      • S(a);SBLOCK,XP(E)::S(B)
      • P(e);N_GUARD,SBLOCK,XP(E)::S(B)
      • B(h);SBLOCK::QAB1(G)
      • S(b);SBLOCK::B(C)
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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).