MESON Chess Problem Database

Problem Display
PID: 202533 (Nq1r4/1bP3n1/p1kPPN2/3R2p1/P2bK3/B1rp4/6Q1/2R5 w - - 0 1)

Loedel, Juan Eduardo

Brisbane Courier, 1923

Nq1r4/1bP3n1/p1kPPN2/3R2p1/P2bK3/B1rp4/6Q1/2R5

#2

11 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.cxd8S#
    • 1...Rxd6
      • 2.Rxd6#
      • 2.cxb8S#
    • 1...Rd7
      • 2.cxb8S#
    • 1...Bc8
      • 2.cxd8S#
  • Tries
    • 1.Rxc3+?
      • 1...Bc5
        • 2.Rcxc5#
      • 1...Bxc3!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Kxd4#
      • 1...Rxd6
        • 2.cxb8S#
      • 1...Bxf6
        • 2.Ke3#
        • 2.Rb6#
      • 1...Sxe6
        • 2.Kf5#
      • 1...Rc5
        • 2.Rb6#
      • 1...Bc5
        • 2.Ke5#
      • 1...Qa7
        • 2.cxd8S#
      • 1...Rc4
        • 2.Kxd3#
      • 1...Bg1
        • 2.Ke5#
      • 1...Bf2
        • 2.Ke5#
      • 1...Be3
        • 2.Kxe3#
        • 2.Ke5#
      • 1...Be5
        • 2.Ke3#
        • 2.Kxe5#
        • 2.Rb6#
      • 1...Bb6
        • 2.Ke5#
        • 2.Rxb6#
      • 1...Ba7
        • 2.Ke5#
      • 1...Sf5
        • 2.Kxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • Q(i);N_GUARD::PXR(j)=S
    • R(j);N_GUARD::PXQ(i)=S
    • B(g);S_CUTQ(i)::PXR(j)=S
  • Tries
    • Try
      • R(A);CHECK,XR(a)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::R1(A),XB(c)
      • Refutation
        • B(c);XR(A)
  • Actual
    • R(F);
    • Threat
      • QAB(B)+K(E),XB(c)
    • Vars
      • R(j);N_GUARD,XP(G)::PXQ(i)=S
      • S(h);XP(H)::QAB(B)+K(E)
      • R(a);S_CUTB(c)::R1(F)
      • B(c);N_SPINR(a)::QAB(B)+K(E)
      • Q(i);N_GUARD::PXR(j)=S
      • R(a);::QAB(B)+K(E),XP(b)
      • B(c);::QAB(B)+K(E)
      • S(h);::QAB(B)+K(E),XS(h)
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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).