MESON Chess Problem Database

Problem Display
PID: 181077 (8/8/8/4p3/Q4p2/1N1b1k1B/8/1n2KN2 w - - 0 1)

Prikryl, Bohuzlav

Munchner Zeitung, 1904

8/8/8/4p3/Q4p2/1N1b1k1B/8/1n2KN2

#2

5 + 5

6490 yacpdb 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sbxd2#
    • 1...Sa3
      • 2.Sbd2#
    • 1...Sc3
      • 2.Sbd2#
    • 1...e4
      • 2.Sd4#
  • Tries
    • 1.Qc6+?
      • 1...e4
        • 2.Sd4#
      • 1...Be4!
    • 1.Qa8+?
      • 1...e4
        • 2.Sd4#
      • 1...Be4!
  • Keys
    • 1.Qa3!
      • 1...Ke4
        • 2.Qa8#
      • 1...Bxf1
        • 2.Sd2#
      • 1...Sxa3
        • 2.Sbd2#
      • 1...Bc2
        • 2.Sbd2#
      • 1...Be2
        • 2.Sbd2#
      • 1...Bc4
        • 2.Sbd2#
      • 1...Be4
        • 2.Sbd2#
        • 2.Sd4#
      • 1...Bb5
        • 2.Sbd2#
      • 1...Bf5
        • 2.Sbd2#
      • 1...Ba6
        • 2.Sbd2#
      • 1...Bg6
        • 2.Sbd2#
      • 1...Bh7
        • 2.Sbd2#
      • 1...Sd2
        • 2.Sbxd2#
      • 1...Sc3
        • 2.Sbd2#
      • 1...e4
        • 2.Sd4#

Anticipated by 5005(1896)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(C),XS(a)
    • S(a);N_GUARD::S(C)
    • P(e);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • P(e);P_SPINP(e)::S(C)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(E);CHECK
      • Vars
        • P(e);P_SPINP(e)::S(C)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(E);
    • Vars
      • K(c);S_FLIGHT::QAB(E)
      • B(b);XS(B)::QAR(E)+S(C),DCHECK
      • S(a);N_GUARD,XQ(E)::S(C)
      • B(b);::QAR(E)+S(C),DCHECK
      • S(a);N_GUARD::S(C),XS(a)
      • S(a);N_GUARD::S(C)
      • P(e);N_GUARD,SBLOCK::S(C)
HTML5 logo

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).