MESON Chess Problem Database

Problem Display
PID: 121471 (8/2p3K1/2Q2B2/3B4/5pk1/8/8/8 w - - 0 1)

Stepan, Ludvik

Svobodne Slovo, 1954

8/2p3K1/2Q2B2/3B4/5pk1/8/8/8

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Be6#
      • 2.Qd7#
      • 2.Qe6#
    • 1...Kh5
      • 2.Bf3#
  • Tries
    • 1.Bg2?
      • 1...Kf5
        • 2.Bh3#
        • 2.Qd7#
      • 1...Kh5
        • 2.Bf3#
        • 2.Qf3#
      • 1...f3
        • 2.Qxf3#
      • 1...Kg3!
    • 1.Be6+?
      • 1...Kh5
        • 2.Qh1#
        • 2.Qf3#
        • 2.Qd5#
        • 2.Qe8#
        • 2.Qc5#
      • 1...Kg3!
    • 1.Qd7+?
      • 1...Kh5
        • 2.Bf3#
        • 2.Bf7#
        • 2.Qh3#
        • 2.Qf5#
      • 1...Kg3!
    • 1.Qe6+?
      • 1...Kh5
        • 2.Bf3#
        • 2.Qh3#
        • 2.Qf5#
      • 1...Kg3!
  • Keys
    • 1.Bh1!
      • 1...Kg3
        • 2.Qg2#
      • 1...Kh3
        • 2.Qg2#
      • 1...Kf5
        • 2.Qd7#
      • 1...Kh5
        • 2.Bf3#
        • 2.Qf3#
      • 1...f3
        • 2.Qxf3#

Anticipated by 195122(1918)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::B(A)
  • Tries
    • Try
      • B(A);
      • Vars
        • P(a);::QAB1(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);S_FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::QAB(B)
      • P(a);::QAB1(B),XP(a)
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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).