MESON Chess Problem Database

Problem Display
PID: 184783 (1K6/7p/3n4/8/6P1/1p3QR1/4N1Pq/4r2k w - - 0 1)

Palkoska, Emil

Manchester Weekly Times, 1908

1K6/7p/3n4/8/6P1/1p3QR1/4N1Pq/4r2k

#2

6 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2
      • 2.Rh3#
      • 2.Qxg2#
    • 1...Qh3
      • 2.Rxh3#
  • Tries
    • 1.Qf1+?
      • 1...Qg1
        • 2.Rh3#
      • 1...Rxf1!
  • Keys
    • 1.Rh3!
      • threat
        • 2.g3#
      • 1...Qxh3
        • 2.Qxh3#
      • 1...Rxe2
        • 2.Qf1#
      • 1...Rf1
        • 2.Qxf1#
      • 1...Rg1
        • 2.Sg3#

This is a version of 164742

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATEB::R(D),XQ(c)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(c);P_SPINQ(c),S_CUTR(a)::R(D)
      • Refutation
        • R(a);XQ(C)
  • Actual
    • R(D);P_PINQ(c)
    • Threat
      • QAB(C)+P(B)
    • Vars
      • Q(c);N_SPINQ(c),OGATE,XR(D)::QAR2(C),XQ(c)
      • R(a);N_GUARD,XS(A)::QAR2(C)
      • R(a);N_GUARD::QAR2(C),XR(a)
      • R(a);SBLOCK::S(A)
HTML5 logo

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).