MESON Chess Problem Database

Problem Display
PID: 91341 (6Q1/4pq2/4NR1b/5bpp/2NP1n1R/p2r1k2/4p1p1/KB2Bn2 w - - 0 1)

Zilahi, Zoltan

Die Schwalbe, 1949

6Q1/4pq2/4NR1b/5bpp/2NP1n1R/p2r1k2/4p1p1/KB2Bn2

#2

9 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qa8#
    • 1...Rxd4
      • 2.Sxd4#
    • 1...Bh3
      • 2.Qa8#
    • 1...Bg4
      • 2.Qa8#
    • 1...Bg7
      • 2.Sxg5#
    • 1...Bf8
      • 2.Sxg5#
    • 1...Sh3
      • 2.Qa8#
    • 1...Sxe6
      • 2.Qa8#
    • 1...Sg6
      • 2.Qa8#
  • Tries
    • 1.Qa8+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Be4!
  • Keys
    • 1.Qxg5!
      • threat
        • 2.Rxf4#
      • 1...Ke4
        • 2.Qxg2#
      • 1...Rxd4
        • 2.Sxd4#
      • 1...Bxg5
        • 2.Sxg5#
      • 1...Sxe6
        • 2.Se5#
      • 1...Bg4
        • 2.Qd5#
      • 1...Sh3
        • 2.Se5#
      • 1...Sd5
        • 2.Se5#
      • 1...Sg6
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(f);P_SPINR(e),P_SPINS(g),S_FLIGHT::QAB(I)
    • R(e);XP(E)::S(G),XR(e)
    • B(h);N_GUARD,P_SPINS(g)::QAB(I)
    • B(k);N_GUARD::S(G),XP(i)
    • S(g);N_GUARD,P_SPINB(h)::QAB(I)
    • S(g);N_GUARD,P_SPINB(h),XS(G)::QAB(I)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINB(h),P_SPINS(g)::QAB(I),XS(g)
      • Refutation
        • B(h);P_SPINB(h),P_SPINS(g)
  • Actual
    • Q(I);XP(i)
    • Threat
      • R1(F),XS(g)
    • Vars
      • K(f);P_SPINR(e),P_SPINS(g),S_FLIGHT::QAB(I),XP(c)
      • R(e);XP(E)::S(G),XR(e)
      • B(k);XQ(I)::S(G),XB(k)
      • S(g);P_SPINB(h),XS(G)::S(D)
      • B(h);OGATE,P_SPINS(g)::QAB(I)
      • S(g);P_SPINB(h)::S(D)
      • S(g);N_GUARD,P_SPINB(h),S_CUTQ(m)::QAB(I),XP(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).