MESON Chess Problem Database

Problem Display
PID: 174921 (4QK2/5n2/pprR4/2k2N2/b7/2P5/1P6/8 w - - 0 1)

Prikryl, Bohuzlav

Sachove listy, 1901

4QK2/5n2/pprR4/2k2N2/b7/2P5/1P6/8

#2

6 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qxc6#
    • 1...Bc2
      • 2.Qxc6#
    • 1...Bb3
      • 2.Qxc6#
    • 1...b5
      • 2.Qxc6#
  • Tries
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qd5#
      • 1...Sxe5!
    • 1.b4+?
      • 1...Kb5
        • 2.Qxc6#
      • 1...Kc4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Rd5#
      • 1...Kb5
        • 2.Rd5#
      • 1...Kxd6
        • 2.Qe7#
      • 1...Rxd6
        • 2.b4#
      • 1...Sxd6
        • 2.Qe5#
      • 1...Bb3
        • 2.Qxc6#
      • 1...b5
        • 2.Rxc6#
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAR1(E),XR(e)
    • P(d);S_CUTB(a)::QAR1(E),XR(e)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(E)
      • Refutation
        • S(f);XQ(E)
    • Try
      • P(A);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINR(e)::QAB1(E),XR(e)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • R1(D)
    • Vars
      • K(b);P-FLIGHT,P_SPINR(e)::R(D)
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(E)
      • R(e);SBLOCK,XR(D)::P(A)
      • S(f);N_GUARD,XR(D)::QAR2(E)
      • B(a);N_GUARD::QAR1(E),XR(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).