MESON Chess Problem Database

Problem Display
PID: 181757 (1b1k4/1pR3N1/1Nq1p3/4Q3/8/5p1K/8/8 w - - 0 1)

Prikryl, Bohuzlav

Lidove noviny, 1905

1b1k4/1pR3N1/1Nq1p3/4Q3/8/5p1K/8/8

#2

5 + 6

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Rd7#
      • 2.Qd6#
    • 1...Qd7
      • 2.Rxd7#
    • 1...Qc1
      • 2.Rd7#
      • 2.Qd6#
    • 1...Qc2
      • 2.Rd7#
      • 2.Qd6#
    • 1...Qc3
      • 2.Rd7#
      • 2.Qd6#
    • 1...Qc4
      • 2.Rd7#
      • 2.Qd6#
    • 1...Qc5
      • 2.Rd7#
    • 1...Qd6
      • 2.Qxd6#
    • 1...Bxc7
      • 2.Qf6#
      • 2.Qg5#
  • Tries
    • 1.Sxe6+?
      • 1...Ke8
        • 2.Qh8#
        • 2.Qh5#
      • 1...Qxe6+!
    • 1.Qd6+?
      • 1...Qd7
        • 2.Rxd7#
        • 2.Rc8#
        • 2.Qxd7#
      • 1...Qxd6!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qe7#
      • 1...Kxc7
        • 2.Sxe6#
      • 1...Qxc5
        • 2.Rd7#
      • 1...Qxc7
        • 2.Qf8#
      • 1...Bxc7
        • 2.Qg5#
      • 1...Qd7
        • 2.Rxd7#
      • 1...Qe8
        • 2.Rc8#
      • 1...Qd6
        • 2.Qxd6#

This anticipates 181804(1905)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::R1(D),XQ(b)
    • Q(b);N_GUARD::R1(D)
    • Q(b);N_GUARD::QAR2(B),XQ(b)
  • Tries
    • Try
      • S(E);CHECK,XP(c)
      • Refutation
        • Q(b);CHECK,XS(E)
    • Try
      • Q(B);CHECK
      • Refutation
        • Q(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(f);P_SPINQ(b),S_FLIGHT,XR(D)::S(E),XP(c)
      • Q(b);N_GUARD,XQ(B)::R1(D)
      • Q(b);N_GUARD,SBLOCK,XR(D)::QAR2(B)
      • B(e);SBLOCK,XR(D)::QAB(B)
      • Q(b);N_GUARD::R1(D),XQ(b)
      • Q(b);N_GUARD::R1(D)
      • Q(b);N_GUARD::QAR2(B),XQ(b)
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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).