MESON Chess Problem Database

Problem Display
PID: 257286 (B7/5nQn/K2R1r2/3p4/1BNk2N1/3P3R/8/7b w - - 0 1)

Ellerman, Arnoldo

Wiener Schachzeitung, 1932

B7/5nQn/K2R1r2/3p4/1BNk2N1/3P3R/8/7b

#2

9 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Qa7#
    • 1...Sfg5
      • 2.Qa7#
    • 1...Sxd6
      • 2.Qa7#
    • 1...Sh6
      • 2.Qa7#
    • 1...Sd8
      • 2.Qa7#
    • 1...Sh8
      • 2.Qa7#
  • Tries
    • 1.Sa3?
      • threat
        • 2.Sc2#
        • 2.Sb5#
      • 1...Sxd6
        • 2.Sc2#
        • 2.Qa7#
      • 1...Bf3!
    • 1.Sa5?
      • threat
        • 2.Sb3#
        • 2.Sc6#
      • 1...Se5
        • 2.Sb3#
        • 2.Qa7#
      • 1...Sd8
        • 2.Sb3#
        • 2.Qa7#
      • 1...Bf3!
    • 1.Sce5?
      • threat
        • 2.Sc6#
      • 1...Sxe5
        • 2.Qa7#
      • 1...Rf3
        • 2.Rxd5#
      • 1...Sd8
        • 2.Qa7#
      • 1...Bf3!
    • 1.Qxf6+?
      • 1...Se5
        • 2.Qxe5#
        • 2.Qf2#
      • 1...Sxf6!
  • Keys
    • 1.Sge5!
      • threat
        • 2.Sc6#
      • 1...Sxe5
        • 2.Qa7#
      • 1...Bf3
        • 2.Qg1#
      • 1...Rf3
        • 2.Rxd5#
      • 1...Sd8
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(e);N_SPINR(d),OGATE::QAB(H)
    • S(e);OGATE::QAB(H)
    • S(e);N_SPINP(c),OGATE,XR(G)::QAB(H)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);
    • Try
      • S(D);N_PINR(d)
      • Threat
        • S(D)
      • Vars
        • S(e);OGATE,XS(D)::QAB(H)
        • R(d);N_PINR(G)::R1(G),XP(c)
        • S(e);OGATE::QAB(H)
      • Refutation
        • B(a);
    • Try
      • Q(H);CHECK,N_SPINR(G),XR(d)
      • Refutation
        • S(f);XQ(H)
  • Actual
    • S(E);N_PINR(d)
    • Threat
      • S(E)
    • Vars
      • S(e);OGATE,XS(E)::QAB(H)
      • B(a);S_CUTR(d)::QAB(H)
      • R(d);N_PINR(G)::R1(G),XP(c)
      • S(e);OGATE::QAB(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).