MESON Chess Problem Database

Problem Display
PID: 174712 (BB5r/7Q/KN2N1q1/2pP1n2/Rbn1k1P1/2P1p1P1/4P3/8 w - - 0 1)

Lipton, Michael

Die Schwalbe, 2017

BB5r/7Q/KN2N1q1/2pP1n2/Rbn1k1P1/2P1p1P1/4P3/8

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Sg5#
    • 1...Qxh7
      • 2.Sg5#
    • 1...Qe8
      • 2.Sg5#
      • 2.Qxf5#
    • 1...Qg5
      • 2.Sxg5#
    • 1...Qxe6
      • 2.dxe6#
    • 1...Qh6
      • 2.Qxf5#
    • 1...Qg7
      • 2.Qxf5#
    • 1...Qg8
      • 2.Qxf5#
    • 1...Rc8
      • 2.Qh1#
    • 1...Rd8
      • 2.Qh1#
    • 1...Re8
      • 2.Qh1#
    • 1...Rf8
      • 2.Qh1#
    • 1...Rg8
      • 2.Qh1#
    • 1...Ba5
      • 2.Sxc5#
    • 1...Sb2
      • 2.Sxc5#
    • 1...Sd2
      • 2.Sxc5#
    • 1...Sa3
      • 2.Sxc5#
    • 1...Sa5
      • 2.Sxc5#
    • 1...Se5
      • 2.Sxc5#
    • 1...Sxb6
      • 2.Sxc5#
    • 1...Sxg3
      • 2.Sg5#
    • 1...Sd4
      • 2.Sg5#
    • 1...Sh4
      • 2.Sg5#
    • 1...Sh6
      • 2.Sg5#
    • 1...Se7
      • 2.Sg5#
    • 1...Sg7
      • 2.Sg5#
  • Keys
    • 1.Sd7!
      • threat
        • 2.d6#
      • 1...Qxe6+
        • 2.dxe6#
      • 1...Rxb8
        • 2.Qh1#
      • 1...Rc8
        • 2.Qh1#
      • 1...Sa5
        • 2.Sxc5#
      • 1...Se5
        • 2.Sxc5#
      • 1...Sb6
        • 2.Sexc5#
        • 2.Sdxc5#
      • 1...Scd6
        • 2.Sexc5#
      • 1...Sd4
        • 2.Sf6#
      • 1...Sfd6
        • 2.Sg5#
      • 1...Se7
        • 2.Sf6#

This is a version of 750

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 19
  • Sets
    • Q(g);N_GUARD,P_SPINS(f)::S(I)
    • Q(g);N_GUARD,XQ(J)::S(I)
    • Q(g);N_GUARD,P_SPINS(f)::S(I),XQ(g)
    • Q(g);OGATE,P_PINS(H),P_SPINS(f),XS(I)::B(K)+P(F),XQ(g)
    • Q(g);OGATE,P_SPINS(f)::QAB1(J),XS(f)
    • R(h);N_GUARD::QAB(J)
    • B(b);N_GUARD,P_SPINS(c)::S(I),XP(e)
    • S(c);P_SPINB(b)::S(I),XP(e)
    • S(c);P_SPINB(b),XS(H)::S(I),XP(e)
    • S(f);P_SPINQ(g),XP(C)::S(I)
    • S(f);P_SPINQ(g)::S(I)
  • Actual
    • S(H);P_SPINS(I)
    • Threat
      • B(K)+P(F)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINS(f),XS(I)::B(K)+P(F),XQ(g)
      • R(h);N_GUARD,XB(L)::QAB(J)
      • R(h);N_GUARD::QAB(J)
      • S(c);P_SPINB(b)::S(H),XP(e)
      • S(c);N_PINS(I),P_SPINB(b)::S(I),XP(e)
      • S(f);P_SPINQ(g)::S(H)
      • S(f);N_PINS(I),P_SPINQ(g)::S(I)
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).