MESON Chess Problem Database

Problem Display
PID: 233304 (8/n2K3b/3R2p1/1p1Nkp2/4pR2/3pP1q1/r6Q/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach-Aktiv, 2010

8/n2K3b/3R2p1/1p1Nkp2/4pR2/3pP1q1/r6Q/8

#2

6 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qxf4#
    • 1...Ra1
      • 2.Qb2#
    • 1...Rb2
      • 2.Qxb2#
    • 1...Ra5
      • 2.Qb2#
    • 1...Ra6
      • 2.Qb2#
    • 1...Bg8
      • 2.Qh8#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Re6#
      • 1...Qxe3
        • 2.Rxe4#
      • 1...Bg8
        • 2.Qh8#
      • 1...Ra6!
    • 1.Sb4?
      • threat
        • 2.Re6#
      • 1...Ra6
        • 2.Qb2#
      • 1...Bg8
        • 2.Qh8#
      • 1...Qxe3!
    • 1.Sb6?
      • threat
        • 2.Re6#
      • 1...Bg8
        • 2.Qh8#
      • 1...Qxe3!
    • 1.Sf6?
      • threat
        • 2.Re6#
      • 1...Qxe3
        • 2.Rxe4#
      • 1...Ra6
        • 2.Qb2#
      • 1...Bg8!
    • 1.Sc7?
      • threat
        • 2.Re6#
      • 1...Ra6
        • 2.Qb2#
      • 1...Bg8
        • 2.Qh8#
      • 1...Qxe3!
    • 1.Qxa2?
      • threat
        • 2.Re6#
        • 2.Qa1#
        • 2.Qb2#
      • 1...Qe1
        • 2.Re6#
      • 1...Qf2
        • 2.Re6#
      • 1...Qh2
        • 2.Re6#
      • 1...Qg1
        • 2.Re6#
        • 2.Qb2#
      • 1...Qg2
        • 2.Re6#
      • 1...Bg8
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sc6
        • 2.Re6#
      • 1...Qxe3!
  • Keys
    • 1.Se7!
      • threat
        • 2.Re6#
      • 1...Qxe3
        • 2.Rxf5#
      • 1...Ra6
        • 2.Qb2#
      • 1...Bg8
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(c);OGATE,P_SPINQ(c),XR(C)::QAB1(A),XQ(c)
    • R(a);N_GUARD::QAB(A)
    • R(a);N_GUARD::QAB(A),XR(a)
    • B(j);OGATE::QAB(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • Q(c);XP(B)::QAB(A)+R(C),DCHECK,XP(d)
        • B(j);OGATE::QAB(A)
      • Refutation
        • R(a);
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • R(a);N_GUARD::QAB(A)
        • B(j);OGATE::QAB(A)
      • Refutation
        • Q(c);XP(B)
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • B(j);OGATE::QAB(A)
      • Refutation
        • Q(c);XP(B)
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • Q(c);XP(B)::QAB(A)+R(C),DCHECK,XP(d)
        • R(a);N_GUARD::QAB(A)
      • Refutation
        • B(j);
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • R(a);N_GUARD::QAB(A)
        • B(j);OGATE::QAB(A)
      • Refutation
        • Q(c);XP(B)
    • Try
      • Q(A);XR(a)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);::R1(E)
        • S(i);::R1(E)
      • Refutation
        • Q(c);XP(B)
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • Q(c);XP(B)::QAB(A)+R(C),DCHECK,XP(g)
      • R(a);N_GUARD::QAB(A)
      • B(j);OGATE::QAB(A)
HTML5 logo

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).