MESON Chess Problem Database

Problem Display
PID: 50483 (1Q6/2NB4/PbKn2p1/2p1k1r1/5R2/5pP1/3P3q/4r3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 1958

1Q6/2NB4/PbKn2p1/2p1k1r1/5R2/5pP1/3P3q/4r3

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qh8#
    • 1...Qxd2
      • 2.Qh8#
    • 1...Qe2
      • 2.Qh8#
    • 1...Qf2
      • 2.Qh8#
    • 1...Qg2
      • 2.Qh8#
    • 1...Qh8
      • 2.Qxh8#
    • 1...Ba7
      • 2.Qb2#
    • 1...Bxc7
      • 2.Qb2#
    • 1...Sc4
      • 2.Qe8#
    • 1...Sb5
      • 2.Qe8#
    • 1...Sb7
      • 2.Qe8#
    • 1...Sf7
      • 2.Qe8#
    • 1...Se8
      • 2.Qxe8#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qxd6#
      • 1...Qxd2
        • 2.Qh8#
      • 1...Bc7!
    • 1.Sd5?
      • threat
        • 2.Qxd6#
      • 1...Bc7
        • 2.Qb2#
      • 1...Re4!
    • 1.Se6?
      • threat
        • 2.Qxd6#
      • 1...Qxd2
        • 2.Qh8#
      • 1...Bc7
        • 2.Qb2#
      • 1...Rf5!
    • 1.Se8?
      • threat
        • 2.Qxd6#
      • 1...Bc7
        • 2.Qb2#
      • 1...Qxd2!
  • Keys
    • 1.Sa8!
      • threat
        • 2.Qxd6#
      • 1...Qxd2
        • 2.Qh8#
      • 1...Bc7
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::QAB(H)
    • Q(b);N_GUARD,XP(A)::QAB(H)
    • Q(b);N_GUARD::QAB(H),XQ(b)
    • B(g);OGATE::QAB(H)
    • B(g);OGATE,XS(F)::QAB(H)
    • S(h);N_GUARD::QAR(H)
    • S(h);N_GUARD::QAR(H),XS(h)
  • Tries
    • Try
      • S(F);P_PINS(h)
      • Threat
        • QAB1(H),XS(h)
      • Vars
        • Q(b);N_GUARD,XP(A)::QAB(H)
      • Refutation
        • B(g);N_SPINS(h)
    • Try
      • S(F);P_PINS(h)
      • Threat
        • QAB1(H),XS(h)
      • Vars
        • B(g);N_SPINS(h),OGATE::QAB(H)
      • Refutation
        • R(a);
    • Try
      • S(F);P_PINS(h)
      • Threat
        • QAB1(H),XS(h)
      • Vars
        • Q(b);N_GUARD,XP(A)::QAB(H)
        • B(g);N_SPINS(h),OGATE::QAB(H)
      • Refutation
        • R(f);
    • Try
      • S(F);P_PINS(h)
      • Threat
        • QAB1(H),XS(h)
      • Vars
        • B(g);N_SPINS(h),OGATE::QAB(H)
      • Refutation
        • Q(b);XP(A)
  • Actual
    • S(F);P_PINS(h)
    • Threat
      • QAB1(H),XS(h)
    • Vars
      • Q(b);N_GUARD,XP(A)::QAB(H)
      • B(g);N_SPINS(h),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).