MESON Chess Problem Database

Problem Display
PID: 108635 (1q2RQb1/1nrp2pp/3pn3/r5p1/p2k2p1/B3R1P1/B2N2NK/b7 w - - 0 1)

Kiss, Janos

BTSB TT, 1952

1q2RQb1/1nrp2pp/3pn3/r5p1/p2k2p1/B3R1P1/B2N2NK/b7

#2

9 + 15

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.R8e4#
    • 1...Sec5
      • 2.Qxg7#
    • 1...Sed8
      • 2.R8e4#
    • 1...Sxf8
      • 2.R8e4#
    • 1...Sbc5
      • 2.Qxd6#
  • Tries
    • 1.Qxd6+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...Sxd6!
    • 1.Qxg7+?
      • 1...Sxg7
        • 2.R8e4#
      • 1...Re5!
    • 1.Qf4+?
      • 1...Sxf4
        • 2.R8e4#
      • 1...gxf4!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qd3#
      • 1...Rc3
        • 2.Re4#
      • 1...Sf4
        • 2.R8e4#
      • 1...Sec5
        • 2.Qxa1#
      • 1...Sbc5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(h);OGATE::R1(H)
    • S(h);N_GUARD,S_CUTR(e)::QAB(I),XP(l)
    • S(h);OGATE,XQ(I)::R1(H)
    • S(i);N_GUARD,S_CUTR(e)::QAR2(I),XP(g)
  • Tries
    • Try
      • Q(I);CHECK,XP(g)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAR1(I),XR(e)
      • Refutation
        • S(i);XQ(I)
    • Try
      • Q(I);CHECK,XP(l)
      • Vars
        • S(h);OGATE,XQ(I)::R1(H)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • Q(I);CHECK
      • Vars
        • S(h);OGATE,XQ(I)::R1(H)
      • Refutation
        • P(f);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • R(j);SBLOCK::R1(F)
      • S(h);OGATE::R1(H)
      • S(h);S_CUTR(j)::QAB(I),XB(a)
      • S(i);S_CUTR(j)::QAR1(I)
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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).