MESON Chess Problem Database

Problem Display
PID: 203672 (5r1B/2pR1n2/2p1q1p1/3Bp1r1/1PNk1PR1/2Np1P1p/3P3K/8 w - - 0 1)

Cristoffanini, Guido

La Settimana Enigmistica, 1932

5r1B/2pR1n2/2p1q1p1/3Bp1r1/1PNk1PR1/2Np1P1p/3P3K/8

#2

11 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.fxg5#
    • 1...Qd6
      • 2.fxg5#
    • 1...Qe7
      • 2.fxg5#
    • 1...Qe8
      • 2.fxg5#
    • 1...Rh5
      • 2.f5#
    • 1...Sh6
      • 2.Bxe6#
    • 1...Sd8
      • 2.Bxe6#
    • 1...Sxh8
      • 2.Bxe6#
    • 1...c5
      • 2.Sb5#
  • Tries
    • 1.Sxe5?
      • threat
        • 2.Sxc6#
      • 1...Qxd5
        • 2.fxg5#
      • 1...Qxe5
        • 2.Bxf7#
      • 1...Rxe5
        • 2.f5#
      • 1...Sxe5
        • 2.Bxe6#
      • 1...Sxh8
        • 2.Bxe6#
      • 1...cxd5
        • 2.Sb5#
      • 1...c5
        • 2.Sb5#
        • 2.Sc6#
      • 1...Rxh8!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Sb3#
      • 1...Qxd5
        • 2.fxg5#
      • 1...cxd5
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD,P_SPINQ(g),XB(I)::R(H)+P(G),XR(e)
    • Q(g);N_GUARD::R(H)+P(G),XR(e)
    • R(e);N_GUARD::R(H)+P(G)
    • S(j);N_GUARD::R(J)+B(I),XQ(g)
    • S(j);N_GUARD,N_SPINP(d),XB(K)::R(J)+B(I),XQ(g)
    • P(f);N_GUARD::S(C)
  • Tries
    • Try
      • S(F);XP(d)
      • Threat
        • B(K)+S(F),DCHECK,XP(f)
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g),XB(I)::R(H)+P(G),XR(e)
        • Q(g);OGATE,P_PINP(G),P_SPINQ(g),XS(F)::R(J)+B(I),XS(j)
        • R(e);N_GUARD,P_SPINR(e),XS(F)::R(H)+P(G)
        • S(j);N_GUARD,P_SPINS(j),XS(F)::R(J)+B(I),XQ(g)
        • S(j);N_GUARD,XB(K)::R(J)+B(I),XQ(g)
        • P(f);N_GUARD,P_SPINP(f),XB(I)::S(C)
      • Refutation
        • R(k);XB(K)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(g);N_GUARD,P_SPINQ(g),XB(I)::R(H)+P(G),XR(e)
      • P(f);N_GUARD,N_SPINP(d),P_SPINP(f),XB(I)::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).