MESON Chess Problem Database

Problem Display
PID: 203657 (3Q4/1K6/1P2pP2/2RN4/3k4/P1p1R1P1/8/8 w - - 0 1)

Diskin, AC

64 Shakhmatnoe obozrenie, 1924

3Q4/1K6/1P2pP2/2RN4/3k4/P1p1R1P1/8/8

#2

9 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sc7+?
      • 1...Kxc5
        • 2.Rxc3#
      • 1...Kxe3!
  • Keys
    • 1.Re5!
      • threat
        • 2.Sxc3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Sf4#
        • 2.Sc7#
        • 2.Se7#
      • 1...Kd3
        • 2.Sb4#
      • 1...Kxc5
        • 2.Se3#
      • 1...Kxe5
        • 2.Sxc3#
      • 1...exd5
        • 2.Qxd5#
      • 1...c2
        • 2.Sc3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Sf4#
        • 2.Sc7#
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(D)::R(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
  • Actual
    • R(B);
    • Threat
      • DUALS(6)
    • Vars
      • K(b);P-FLIGHT::QAR(I)+S(E),DCHECK
      • K(b);S_FLIGHT,XR(D)::R(B)+S(E)
      • K(b);S_FLIGHT,XR(B)::R(D)+S(E),XP(a)
      • P(c);OGATE,P_SPINP(c),XS(E)::QAR1(I),XP(c)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).