MESON Chess Problem Database

Problem Display
PID: 62604 (r7/3n3q/5p2/1p3Rp1/b1pk4/2N1N3/3P4/1K3Q2 w - - 0 1)

Capraez, Friedrich

Schachzeitung der Berliner Schachgesellschaft, 1855

r7/3n3q/5p2/1p3Rp1/b1pk4/2N1N3/3P4/1K3Q2

#2

6 + 9

302 Schachzeitung 1857

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Rd5#
    • 1...Qh3
      • 2.Rd5#
    • 1...Qh4
      • 2.Rd5#
    • 1...Qh5
      • 2.Rd5#
    • 1...Qh6
      • 2.Rd5#
    • 1...Qe7
      • 2.Rd5#
    • 1...Qg7
      • 2.Rd5#
    • 1...Qh8
      • 2.Rd5#
    • 1...Bc2+
      • 2.Sxc2#
    • 1...b4
      • 2.Qxc4#
  • Tries
    • 1.Sxb5+?
      • 1...Ke4
        • 2.Qxc4#
      • 1...Bxb5!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Rd5#
        • 2.Qd6#
      • 1...gxf4!
  • Keys
    • 1.Qd3+!
      • 1...Kxd3
        • 2.Rd5#
      • 1...cxd3
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(h);N_PINR(F)::R1(F)
    • B(a);CHECK,N_GUARD,N_PINR(F)::S(E),XB(a)
    • P(d);N_GUARD::QAR1(B),XP(b)
  • Tries
    • Try
      • S(D);CHECK,XP(d)
      • Vars
        • K(c);N_PINR(F),P-FLIGHT::QAR2(B),XP(b)
      • Refutation
        • B(a);XS(D)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(e);XQ(B)
  • Actual
    • Q(B);CHECK,N_SPINR(F)
    • Vars
      • K(c);P-FLIGHT,XQ(B)::R(F)
      • P(b);SBLOCK,XQ(B)::R1(F)
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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).