MESON Chess Problem Database

Problem Display
PID: 206592 (1Q6/2p5/2p1p3/3p4/1B1k4/1n1Bp1K1/4P3/8 w - - 0 1)

Katzenellenbogen, Israel Davidovich

64 Shakhmatnoe obozrenie, 1925

1Q6/2p5/2p1p3/3p4/1B1k4/1n1Bp1K1/4P3/8

#2

5 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qh8#
  • Tries
    • 1.Bc3+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Kxc3!
  • Keys
    • 1.Ba3!
      • 1...Kc3
        • 2.Qb4#
      • 1...Ke5
        • 2.Qh8#
      • 1...Sa1
        • 2.Qb2#
      • 1...Sc1
        • 2.Qb2#
      • 1...Sd2
        • 2.Qb2#
      • 1...Sa5
        • 2.Qb2#
      • 1...Sc5
        • 2.Bb2#
        • 2.Qb2#
      • 1...c5
        • 2.Bb2#
      • 1...e5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINP(g),S_FLIGHT::QAB(E)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT,XB(D)
  • Actual
    • B(D);
    • Vars
      • K(c);S_FLIGHT::QAB1(E)
      • K(c);P_SPINP(g),S_FLIGHT::QAB(E)
      • S(a);OGATE::QAB(E)
      • P(e);SBLOCK::B(D)
      • P(f);SBLOCK::QAR2(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).