MESON Chess Problem Database

Problem Display
PID: 186169 (b3N3/K1nN2r1/p5r1/1pB2Qp1/2k1pn1q/R1P5/7b/1B6 w - - 0 1)

Ellerman, Arnoldo

Il Due Mosse, 1959

b3N3/K1nN2r1/p5r1/1pB2Qp1/2k1pn1q/R1P5/7b/1B6

#2

8 + 12

81 Chess 1959

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Sxb6#
    • 1...Rc6
      • 2.Qxe4#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Bc6
      • 2.Sb6#
    • 1...Sd3
      • 2.Ba2#
    • 1...Sfd5
      • 2.Qf1#
    • 1...Sfe6
      • 2.Sb6#
    • 1...Scd5
      • 2.Qxe4#
    • 1...Sce6
      • 2.Sd6#
    • 1...e3
      • 2.Ba2#
  • Keys
    • 1.Be3!
      • threat
        • 2.Qc5#
      • 1...Rc6
        • 2.Qxe4#
      • 1...Bd5
        • 2.Se5#
      • 1...Sd3
        • 2.Ba2#
      • 1...Sfd5
        • 2.Qf1#
      • 1...Sfe6
        • 2.Sb6#
      • 1...Scd5
        • 2.Qxe4#
      • 1...Sce6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(i);N_GUARD::S(G),XR(i)
    • R(i);S_CUTB(l)::QAR2(E),XP(c)
    • R(i);N_GUARD::S(H),XR(i)
    • B(l);S_CUTR(i)::S(G)
    • S(d);SBLOCK::B(A)
    • S(d);OGATE,SBLOCK::QAB(E)
    • S(d);S_CUTR(i)::S(G)
    • S(j);P_PINS(G),S_CUTB(l)::QAR2(E),XP(c)
    • S(j);P_PINS(G),S_CUTR(i)::S(H)
    • P(c);::B(A)
  • Actual
    • B(D);
    • Threat
      • QAR1(E)
    • Vars
      • R(i);S_CUTB(l)::QAR2(E),XP(c)
      • B(l);SBLOCK::S(G)
      • S(d);SBLOCK::B(A)
      • S(d);OGATE,SBLOCK::QAB(E)
      • S(d);S_CUTR(i)::S(G)
      • S(j);P_PINS(G),S_CUTB(l)::QAR2(E),XP(c)
      • S(j);P_PINS(G),S_CUTR(i)::S(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).