MESON Chess Problem Database

Problem Display
PID: 10977 (R7/2p5/1r6/4P3/R7/3pPQ2/1k1K4/8 w - - 0 1)

Berger, Johann Nepomuk

Mirror of American Sports, 1886

R7/2p5/1r6/4P3/R7/3pPQ2/1k1K4/8

#2

6 + 4

119 Tidskrift for Schack 1909
3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Rxb4#
    • 1...Rc6
      • 2.Rb4#
    • 1...Rd6
      • 2.Rb4#
    • 1...Re6
      • 2.Rb4#
    • 1...Rf6
      • 2.Rb4#
    • 1...Rg6
      • 2.Rb4#
    • 1...Rh6
      • 2.Rb4#
    • 1...Rb7
      • 2.Qxb7#
    • 1...Rb8
      • 2.Rxb8#
  • Tries
    • 1.Ra2+?
      • 1...Kb1
        • 2.Qd1#
        • 2.Qh1#
        • 2.Qf1#
      • 1...Kb3!
    • 1.Qd5?
      • threat
        • 2.Qa2#
      • 1...Kb1
        • 2.Qa2#
      • 1...Rb3!
    • 1.Qf7?
      • threat
        • 2.Qa2#
      • 1...Kb1
        • 2.Qa2#
      • 1...Re6
        • 2.Rb4#
      • 1...Rb3!
  • Keys
    • 1.Qc6!
      • 1...Kb1
        • 2.Qc1#
      • 1...Kb3
        • 2.Qc3#
      • 1...Rxc6
        • 2.Rb4#
      • 1...Ra6
        • 2.Qb5#
      • 1...Rb3
        • 2.Qc1#
      • 1...Rb4
        • 2.Rxb4#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rb8
        • 2.Rxb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::R(D),XR(c)
    • R(c);N_GUARD::R(D)
    • R(c);OGATEB::QAR(C),XR(c)
    • R(c);OGATEB::R(F),XR(c)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • R(c);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • R(c);N_GUARD::R(D)
      • Refutation
        • R(c);
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • R(c);N_GUARD,XQ(C)::R(D)
      • R(c);N_GUARD::QAR(C)
      • R(c);SBLOCK::QAB1(C)
      • R(c);N_GUARD::R(D),XR(c)
      • R(c);N_GUARD::QAR(C),XR(c)
      • R(c);OGATEB::QAR(C),XR(c)
      • R(c);OGATEB::R(F),XR(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).