MESON Chess Problem Database

Problem Display
PID: 99458 (r6Q/6nq/4PN2/2R4p/3n1k1r/1pN2p1p/2p1bK2/B5R1 w - - 0 1)

Zilahi, Zoltan

Magyar Sakkelet, 1955

r6Q/6nq/4PN2/2R4p/3n1k1r/1pN2p1p/2p1bK2/B5R1

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qh6#
    • 1...Qe4
      • 2.Qh6#
    • 1...Qg8
      • 2.Qh6#
    • 1...Qh6
      • 2.Qxh6#
    • 1...Rxa1
      • 2.Qb8#
    • 1...Ra2
      • 2.Qb8#
    • 1...Ra3
      • 2.Qb8#
    • 1...Ra4
      • 2.Qb8#
    • 1...Ra5
      • 2.Qb8#
    • 1...Rb8
      • 2.Qxb8#
    • 1...Sdf5
      • 2.Scd5#
    • 1...Sgf5
      • 2.Sfd5#
  • Tries
    • 1.Qxh7?
      • threat
        • 2.Qe4#
        • 2.Qh6#
      • 1...Sdxe6
        • 2.Scd5#
        • 2.Qe4#
      • 1...Sgxe6
        • 2.Qe4#
      • 1...Rg4
        • 2.Qe4#
      • 1...Rh8
        • 2.Qe4#
      • 1...Bd3
        • 2.Qh6#
      • 1...Sdf5
        • 2.Scd5#
      • 1...Sgf5!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Bc1#
      • 1...c1Q
        • 2.Bxc1#
      • 1...c1S
        • 2.Bxc1#
      • 1...c1B
        • 2.Bxc1#
      • 1...c1R
        • 2.Bxc1#
      • 1...Qd3
        • 2.Qh6#
      • 1...Qe4
        • 2.Qh6#
      • 1...Ra1
        • 2.Qb8#
      • 1...Sdf5
        • 2.Scd5#
      • 1...Sgf5
        • 2.Sfd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(k);OGATE::QAB(H)
    • Q(k);OGATE::QAB(H),XQ(k)
    • R(l);N_GUARD,XB(A)::QAB(H)
    • R(l);N_GUARD::QAB(H)
    • R(l);N_GUARD::QAB(H),XR(l)
    • S(f);SBLOCK::S(D)
    • S(j);SBLOCK::S(G)
  • Tries
    • Try
      • Q(H);XQ(k)
      • Threat
        • DUALS(2)
      • Vars
        • S(j);XP(F)::QAR1(H)
        • R(h);::QAR1(H)
        • R(l);::QAR1(H)
        • B(b);::QAB(H)
        • S(f);::S(D)
      • Refutation
        • S(j);
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • P(a);::B(A),XQ(a)
      • P(a);::B(A),XS(a)
      • P(a);::B(A),XB(a)
      • P(a);::B(A),XR(a)
      • Q(k);OGATE::QAB(H)
      • R(l);N_GUARD::QAB(H)
      • S(f);SBLOCK::S(D)
      • S(j);SBLOCK::S(G)
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).