MESON Chess Problem Database

Problem Display
PID: 245677 (1QqN2n1/1RP2PP1/2Bkr3/2pNp3/8/8/1B2K3/8 w - - 0 1)

Wirtanen, Erkki Aukusti

Magyar Sakkvilag, 1934

1QqN2n1/1RP2PP1/2Bkr3/2pNp3/8/8/1B2K3/8

#2

10 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb7
      • 2.c8S#
    • 1...Qd7
      • 2.c8S#
    • 1...Qxc7
      • 2.Qxc7#
    • 1...Qxb8
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Qxd8
      • 2.cxd8S#
    • 1...Re8
      • 2.fxe8S#
    • 1...c4
      • 2.Ba3#
  • Tries
    • 1.Qxc8?
      • threat
        • 2.Qxe6#
        • 2.Qd7#
      • 1...c4
        • 2.Ba3#
      • 1...Rg6
        • 2.Qd7#
      • 1...Rf6
        • 2.Qd7#
      • 1...Rh6
        • 2.Qd7#
      • 1...Re8
        • 2.Qd7#
        • 2.fxe8S#
      • 1...Sf6
        • 2.Qxe6#
      • 1...Re7!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sxc8#
      • 1...Ke7
        • 2.f8Q#
      • 1...Qxb7
        • 2.c8S#
      • 1...Qxc7
        • 2.Sc8#
        • 2.Qxc7#
      • 1...Qxb8
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Qxd8
        • 2.cxd8S#
      • 1...c4
        • 2.Ba3#
      • 1...Qd7
        • 2.c8S#
      • 1...Se7
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(e);OGATE,XR(E)::P=S
    • Q(e);OGATE::P=S
    • Q(e);OGATE,P_SPINQ(e),XP(F)::QAB1(I),XQ(e)
    • Q(e);OGATE,XQ(I)::PXQ(e)=Q
    • Q(e);OGATE,XS(J)::PXQ(e)=S
    • R(d);OGATE::PXR(d)=S
    • P(a);OGATEB::B(A)
  • Tries
    • Try
      • Q(I);XQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB::B(A)
        • R(d);::QAR1(I)
        • S(f);::QAR1(I),XR(d)
      • Refutation
        • R(d);
  • Actual
    • S(C);
    • Threat
      • S(C),XQ(e)
    • Vars
      • K(c);S_FLIGHT::P=Q
      • Q(e);OGATE,XR(E)::P=S
      • Q(e);OGATE,XQ(I)::PXQ(e)=Q
      • Q(e);OGATE,XS(J)::PXQ(e)=S
      • P(a);OGATEB::B(A)
      • Q(e);OGATE::P=S
      • S(f);SBLOCK::S(C)
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).