MESON Chess Problem Database

Problem Display
PID: 62393 (3r4/8/p2b4/k1q5/p1Q5/Np4Pr/3N4/3KB3 w - - 0 1)

Capraez, Friedrich

Schachzeitung der Berliner Schachgesellschaft, 1853

3r4/8/p2b4/k1q5/p1Q5/Np4Pr/3N4/3KB3

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Sxb3#
    • 1...Qxc4
      • 2.Sdxc4#
    • 1...Bxg3
      • 2.Qxc5#
    • 1...Bf4
      • 2.Qxc5#
    • 1...Be5
      • 2.Qxc5#
    • 1...Bc7
      • 2.Qxc5#
    • 1...Bb8
      • 2.Qxc5#
  • Tries
    • 1.Qb5+?
      • 1...Qxb5
        • 2.Sdc4#
      • 1...axb5!
    • 1.Qxa6+?
      • 1...Kb4
        • 2.Sdc4#
      • 1...Kxa6!
  • Keys
    • 1.Qb4+!
      • 1...Kxb4
        • 2.Sdc4#
      • 1...Qxb4
        • 2.Sdc4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(e);SBLOCK::B(B)+S(C),DCHECK,XP(a)
    • Q(e);XQ(F)::B(B)+S(C),DCHECK,XQ(e)
    • B(g);N_GUARD,P_PINS(C),XP(E)::QAR2(F),XQ(e)
    • B(g);N_GUARD,P_PINS(C)::QAR2(F),XQ(e)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • Q(e);XQ(F)::B(B)+S(C),DCHECK
      • Refutation
        • P(f);XQ(F)
    • Try
      • Q(F);CHECK,XP(f)
      • Vars
        • K(d);S_FLIGHT::B(B)+S(C)
      • Refutation
        • K(d);P-FLIGHT,XQ(F)
  • Actual
    • Q(F);CHECK
    • Vars
      • K(d);S_FLIGHT,XQ(F)::B(B)+S(C)
      • Q(e);XQ(F)::S(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).