MESON Chess Problem Database

Problem Display
PID: 206782 (4R2Q/2p1p3/1p2pnP1/1Pp1k1pn/2K1N1R1/4NP2/3P4/8 w - - 0 1)

Galambos, Laszlo

Vasarnapi Ujsag, 1870

4R2Q/2p1p3/1p2pnP1/1Pp1k1pn/2K1N1R1/4NP2/3P4/8

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Rxg5#
    • 1...Sg7
      • 2.Qh2#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sf7#
      • 1...cxd6
        • 2.Re4#
      • 1...exd6
        • 2.Re4#
      • 1...Kxd6!
    • 1.Ra8?
      • 1...Sf4
        • 2.Rxg5#
      • 1...Sg7
        • 2.Qh2#
      • 1...c6
        • 2.Qb8#
      • 1...Sg3!
  • Keys
    • 1.Rxe7!
      • 1...Sg3
        • 2.Qxf6#
      • 1...Sf4
        • 2.Rxg5#
        • 2.Qxf6#
      • 1...Sg7
        • 2.Qh2#
      • 1...c6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(d);SBLOCK::R(F),XP(c)
    • S(d);N_SPINS(g),OGATE::QAB(J)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • P(h);SBLOCK,XS(E)::R1(F)
        • P(i);P_SPINP(f),SBLOCK,XS(E)::R1(F)
      • Refutation
        • K(b);N_SPINS(g),S_FLIGHT,XS(E)
    • Try
      • R(I);
      • Vars
        • S(d);SBLOCK::R(F),XP(c)
        • S(d);N_SPINS(g),OGATE::QAB(J)
        • P(h);OGATEB::QAB(J)
      • Refutation
        • S(d);
  • Actual
    • R(I);P_PINP(f),XP(i)
    • Vars
      • S(d);N_GUARD::QAB1(J),XS(g)
      • S(d);N_SPINS(g),OGATE::QAB(J)
      • P(h);OGATEB::QAB(J)
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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).