MESON Chess Problem Database

Problem Display
PID: 137654 (3Rb2K/8/1Q6/p1nP3n/r2k1Pp1/R2Pp3/B2N4/b1N2q2 w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1935

3Rb2K/8/1Q6/p1nP3n/r2k1Pp1/R2Pp3/B2N4/b1N2q2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Sxe2#
    • 1...Qxd3
      • 2.Rxd3#
    • 1...Qh3
      • 2.Se2#
    • 1...Qg1
      • 2.Se2#
    • 1...Qh1
      • 2.Se2#
    • 1...Bb2
      • 2.Qxb2#
    • 1...Bc3
      • 2.Sdb3#
    • 1...Bc6
      • 2.dxc6#
    • 1...Sg3
      • 2.Qf6#
    • 1...Sxf4
      • 2.Qf6#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sg7
      • 2.Qf6#
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Qxf4
        • 2.Se2#
      • 1...Sxd3
        • 2.Scb3#
      • 1...Sxf4
        • 2.Qg7#
      • 1...Sb3
        • 2.Sdxb3#
      • 1...Se4
        • 2.Sdb3#
      • 1...Sa6
        • 2.Sdb3#
      • 1...Se6
        • 2.Sdb3#
      • 1...Sb7
        • 2.Sdb3#
      • 1...Sd7
        • 2.Rxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::S(A),XQ(b)
    • Q(b);OGATE,XP(E)::R1(D),XQ(b)
    • Q(b);N_GUARD::S(A)
    • B(a);N_GUARD::QAB(H),XB(a)
    • B(a);SBLOCK::S(C)
    • B(j);OGATE::R(I)+P(G),XB(j)
    • S(i);N_GUARD::QAB(H)
    • S(i);N_GUARD,XP(F)::QAB(H)
    • S(i);N_GUARD::QAB(H),XS(i)
  • Actual
    • Q(H);N_PINS(h)
    • Threat
      • QAB1(H)
    • Vars
      • Q(b);N_GUARD,XP(F)::S(A)
      • S(h);N_GUARD,SBLOCK,XP(E)::S(A)
      • S(i);N_GUARD,XP(F)::QAB(H)
      • S(h);N_GUARD::S(C),XS(h)
      • S(h);N_GUARD::S(C)
      • S(h);N_GUARD,S_CUTB(j)::R(D),XR(d)
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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).