Problem Display
PID: 267857 (1N3K2/5p2/1p1BPp1p/pk3rRq/p1N3p1/Pr2P3/bb1P4/1QR2B2 w - - 0 1)

Latzel, Gerhard Paul

El Diluvio, 1933

1N3K2/5p2/1p1BPp1p/pk3rRq/p1N3p1/Pr2P3/bb1P4/1QR2B2

#2

12 + 13


SOLUTION


  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Sxa3#
    • 1...Rc3
      • 2.Qxf5#
    • 1...Bxc1
      • 2.Qxf5#
    • 1...Bxa3
      • 2.Sxa3#
    • 1...Bc3
      • 2.Sb2#
  • Tries
    • 1.Sxa5+?
      • 1...Kxa5
        • 2.Sc6#
      • 1...Rd3!
    • 1.Rxf5+?
      • 1...Be5
        • 2.Sxe5#
      • 1...Qxf5!
    • 1.Qe4?
      • threat
        • 2.Qc6#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Qh1!
  • Keys
    • 1.Be7!
      • threat
        • 2.Sd6#
      • 1...Rxa3
        • 2.Sxa3#
      • 1...Bxc1
        • 2.Qxf5#
      • 1...Bxa3
        • 2.Sxa3#
      • 1...Rc3
        • 2.Qxf5#
      • 1...Bc3
        • 2.Sb2#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(c);P_SPINB(b),XP(E)::B(C)+S(G),DCHECK,XR(c)
    • R(c);P_SPINB(b)::QAR(A),XR(h)
    • B(b);N_GUARD,N_SPINR(h),P_SPINR(c),XR(B)::QAR(A),XR(h)
    • B(b);N_SPINR(h),P_PINB(I),P_SPINR(c),XP(E)::B(C)+S(G),DCHECK,XB(b)
    • B(b);N_SPINR(h),P_SPINR(c)::B(C)+S(G)
  • Tries
    • Try
      • S(G);CHECK,XP(f)
      • Vars
        • K(g);P-FLIGHT,S_CUTR(c),XS(G)::S(K)
      • Refutation
        • R(c);N_SPINR(h),P_SPINB(b),P_SPINR(c)
    • Try
      • R(H);CHECK,XR(h)
      • Vars
        • B(b);P_SPINB(b),P_SPINR(c)::B(C)+S(G),XB(b)
      • Refutation
        • Q(i);XR(H)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(h);N_GUARD::QAR2(A),XR(h)
      • Refutation
        • Q(i);
  • Actual
    • B(I);
    • Threat
      • B(C)+S(G),DCHECK
    • Vars
      • R(c);P_SPINB(b),XP(E)::B(C)+S(G),DCHECK,XR(c)
      • B(b);N_GUARD,N_SPINR(h),P_SPINR(c),XR(B)::QAR(A),XR(h)
      • B(b);N_SPINR(h),P_PINB(I),P_SPINR(c),XP(E)::B(C)+S(G),DCHECK,XB(b)
      • R(c);P_SPINB(b)::QAR(A),XR(h)
      • B(b);N_SPINR(h),P_SPINR(c)::B(C)+S(G)


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).