MESON Chess Problem Database

Problem Display
PID: 207495 (2Q2K2/8/3p1p2/2n1N1b1/4k3/2P3P1/4N3/4Rq2 w - - 0 1)

Gold, Samuel

Magyarorszag es a Nagyvilag, 1871

2Q2K2/8/3p1p2/2n1N1b1/4k3/2P3P1/4N3/4Rq2

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Sf4#
    • 1...Qf4
      • 2.Sxf4#
    • 1...Qf5
      • 2.Sf4#
  • Tries
    • 1.Sf4+?
      • 1...Qe2
        • 2.Rxe2#
      • 1...Qxe1!
  • Keys
    • 1.Qf5+!
      • 1...Ke3
        • 2.Sc4#
      • 1...Kd5
        • 2.c4#
      • 1...Kxf5
        • 2.Sd4#
      • 1...Qxf5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::R(A)+S(B)
    • Q(a);N_GUARD::R(A)+S(B),XQ(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::R(A),XQ(a)
      • Refutation
        • Q(a);XR(A)
  • Actual
    • Q(F);CHECK
    • Vars
      • K(b);P-FLIGHT::S(E)
      • K(b);S_FLIGHT::P(C)
      • K(b);S_FLIGHT,XQ(F)::S(B)
      • Q(a);SBLOCK,XQ(F)::R(A)+S(B)
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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).