MESON Chess Problem Database

Problem Display
PID: 154156 (8/3n1Pp1/1p5b/pP2Q1r1/pkPR2p1/5N2/K4n2/2R1N2q w - - 0 1)

Hoffmann, Fritz

diagrammes, 1974

8/3n1Pp1/1p5b/pP2Q1r1/pkPR2p1/5N2/K4n2/2R1N2q

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sh3
      • 2.Sd3#
    • 1...Se4
      • 2.Sd3#
    • 1...Sxe5
      • 2.f8Q#
      • 2.f8B#
    • 1...Sf6
      • 2.f8Q#
      • 2.f8B#
    • 1...Sb8
      • 2.f8Q#
      • 2.f8B#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qa3#
      • 1...Kc5
        • 2.Qa3#
        • 2.Qe7#
      • 1...a3
        • 2.Qxa3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Qxf3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.c5#
      • 1...Kc5
        • 2.Qe7#
      • 1...Rc5
        • 2.Qb2#
      • 1...Rd5
        • 2.cxd5#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sc5
        • 2.Qd2#
      • 1...Se5
        • 2.f8Q#
        • 2.f8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
    • S(j);N_GUARD,XQ(H)::P=Q
    • S(j);N_GUARD::P=Q
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • P(c);::QAB1(H),XP(c)
        • S(b);N_GUARD::S(B),XS(b)
      • Refutation
        • Q(a);XS(D)
  • Actual
    • Q(H);
    • Threat
      • R(F)+P(E)
    • Vars
      • K(d);S_FLIGHT::QAB(H)
      • R(g);SBLOCK::QAR2(H)
      • R(g);OGATE::R(F)+P(E),XR(g)
      • S(b);N_GUARD::S(B),XS(b)
      • S(j);SBLOCK::QAB(H)
      • S(j);N_GUARD,S_CUTR(g)::P=Q
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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).