MESON Chess Problem Database

Problem Display
PID: 62574 (3R4/B7/8/1p6/1r5R/b1k1p3/P6p/3Q3K w - - 0 1)

Capraez, Friedrich

Schachzeitung der Berliner Schachgesellschaft, 1854

3R4/B7/8/1p6/1r5R/b1k1p3/P6p/3Q3K

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Rd3#
      • 2.Qd3#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Ra4
      • 2.Qb3#
    • 1...Rc4
      • 2.Qb3#
    • 1...Re4
      • 2.Qb3#
    • 1...Rf4
      • 2.Qb3#
    • 1...Rg4
      • 2.Qb3#
    • 1...Rxh4
      • 2.Qb3#
    • 1...Bc1
      • 2.Qxc1#
    • 1...Bb2
      • 2.Rd3#
      • 2.Qd3#
    • 1...e2
      • 2.Qd2#
  • Tries
    • 1.Bd4+?
      • 1...Kc4
        • 2.Qc2#
        • 2.Qe2#
      • 1...Rxd4!
    • 1.Rc8+?
      • 1...Kb2
        • 2.Rc2#
      • 1...Rc4!
  • Keys
    • 1.Rc4+!
      • 1...Kb2
        • 2.Rc2#
      • 1...Kxc4
        • 2.Rc8#
        • 2.Qc2#
        • 2.Qd3#
        • 2.Qd4#
      • 1...Rxc4
        • 2.Qb3#
      • 1...bxc4
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(e);N_GUARD::QAR1(A),XR(e)
    • R(e);N_GUARD::QAR1(A)
    • R(e);N_GUARD,XR(D)::QAR1(A)
    • B(b);N_GUARD::QAR2(A),XB(b)
    • P(d);N_GUARD::QAB1(A)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • R(e);XB(E)
    • Try
      • R(F);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::R1(F)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • R(D);CHECK
    • Vars
      • K(c);OGATE,S_FLIGHT::R1(D)
      • R(e);XR(D)::QAR1(A)
      • P(f);SBLOCK,XR(D)::B(E)
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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).