MESON Chess Problem Database

Problem Display
PID: 143846 (b7/1nN1N3/2p2r1n/4k3/3R3B/5Pp1/1Q3Pr1/3Kb3 w - - 0 1)

Steiner, Paul

StrateGems, 1998

b7/1nN1N3/2p2r1n/4k3/3R3B/5Pp1/1Q3Pr1/3Kb3

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rd5#
    • 1...Rf5
      • 2.Sxc6#
      • 2.Sg6#
    • 1...Rd6
      • 2.f4#
    • 1...Re6
      • 2.f4#
    • 1...Rg6
      • 2.f4#
    • 1...Sf5
      • 2.f4#
    • 1...Sd6
      • 2.Re4#
  • Tries
    • 1.Sxc6+?
      • 1...Kf5
        • 2.Qb1#
        • 2.Qc2#
      • 1...Rxc6!
    • 1.Sg6+?
      • 1...Kf5
        • 2.Qb1#
        • 2.Qc2#
      • 1...Rxg6!
    • 1.Bxg3+?
      • 1...Rf4
        • 2.Rd2#
        • 2.Rd5#
      • 1...Rxg3!
    • 1.Rd3+?
      • 1...Kf4
        • 2.Qd4#
      • 1...Bc3!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qe4#
      • 1...Kxd4
        • 2.Bxf6#
      • 1...Rf4
        • 2.Sxc6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(f);SBLOCK::QAB(B)+R(E),DCHECK
    • R(f);N_GUARD,P_PINR(E)::P(D)
    • R(f);N_GUARD::P(D)
    • S(g);S_CUTR(f)::P(D)
    • S(h);SBLOCK::QAB(B)+R(E),DCHECK
  • Tries
    • Try
      • S(H);CHECK,XP(e)
      • Refutation
        • R(f);XS(H)
    • Try
      • S(H);CHECK
      • Refutation
        • R(f);XS(H)
    • Try
      • B(F);CHECK,XP(c)
      • Refutation
        • R(b);XB(F)
    • Try
      • R(E);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR2(B)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(d);S_FLIGHT,XR(E)::B(F),XR(f)
      • R(f);N_GUARD::S(H),XP(e)
      • S(h);N_GUARD::QAR2(B),XS(h)
      • S(h);N_GUARD::QAR2(B)
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).