MESON Chess Problem Database

Problem Display
PID: 231252 (7Q/1R6/4n1r1/p4b2/4k1p1/1P1Np1p1/1KP1n3/8 w - - 0 1)

Kubbel, Arvid Ivanovich

Shakhmaty, 1927

7Q/1R6/4n1r1/p4b2/4k1p1/1P1Np1p1/1KP1n3/8

#2

6 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qh1+?
      • 1...Kd4
        • 2.Rd7#
      • 1...g2!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Rb4#
        • 2.Rd7#
      • 1...Kf3
        • 2.Rf7#
      • 1...Kd4
        • 2.Rd7#
      • 1...Kd5
        • 2.Rd7#
      • 1...Rg8
        • 2.Rb4#
      • 1...Sc3
        • 2.Rb4#
      • 1...S2d4
        • 2.Rb4#
      • 1...S2f4
        • 2.Rb4#
      • 1...S6d4
        • 2.Re7#
      • 1...S6f4
        • 2.Rb4#
      • 1...Sc5
        • 2.Rb4#
      • 1...Sg5
        • 2.Rb4#
      • 1...Sc7
        • 2.Rb4#
      • 1...Sg7
        • 2.Rb4#
      • 1...Sd8
        • 2.Rb4#
      • 1...Sf8
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT::R(E)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);S_FLIGHT::QAB(F)+R(E)
      • K(d);P-FLIGHT::R(E)
      • K(d);S_FLIGHT::QAB(F)+R(E),DCHECK
      • R(i);::QAB(F)+R(E),DCHECK
      • S(a);::QAB(F)+R(E),DCHECK
      • S(a);::QAB(F)+R(E)
      • S(h);SBLOCK::QAB(F)+R(E),DCHECK
      • S(h);::QAB(F)+R(E),DCHECK
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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).