MESON Chess Problem Database

Problem Display
PID: 196313 (3RR2b/1b6/2p1B3/1N2p3/1P2k1Pn/1rp1p1Kp/7Q/4n3 w - - 0 1)

Bottger, FBH

Haagsche Courant, 1915

3RR2b/1b6/2p1B3/1N2p3/1P2k1Pn/1rp1p1Kp/7Q/4n3

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sxc3#
    • 1...Rb2
      • 2.Sxc3#
    • 1...Rxb4
      • 2.Sxc3#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sef3
      • 2.Qc2#
    • 1...Sg2
      • 2.Bf5#
    • 1...Shf3
      • 2.Bf5#
    • 1...Sf5+
      • 2.Bxf5#
    • 1...Sg6
      • 2.Bf5#
    • 1...e2
      • 2.Qxe2#
  • Tries
    • 1.Qc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sxc2!
    • 1.Qe2?
      • threat
        • 2.Qc4#
      • 1...Sf5+
        • 2.Bxf5#
      • 1...Rxb4
        • 2.Sxc3#
      • 1...Sc2
        • 2.Qd3#
        • 2.Qxc2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sef3
        • 2.Qd3#
        • 2.Qc2#
      • 1...Shf3
        • 2.Bf5#
      • 1...cxb5!
  • Keys
    • 1.Bc8!
      • threat
        • 2.Rd4#
      • 1...Sf5+
        • 2.Bxf5#
      • 1...Rxb4
        • 2.Sxc3#
      • 1...cxb5
        • 2.Bxb7#
      • 1...e2
        • 2.Qxe2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sef3
        • 2.Qc2#
      • 1...Shf3
        • 2.Bf5#
      • 1...c5
        • 2.Bxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::S(E),XP(c)
    • R(b);N_GUARD,XP(C)::S(E),XP(c)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • S(g);N_GUARD::B(F)
    • S(g);CHECK,N_GUARD::B(F),XS(g)
    • P(d);OGATEB::QAR2(A),XP(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);P_PINP(d)
      • Threat
        • QAR2(A)
      • Vars
        • S(g);CHECK,N_GUARD::B(F),XS(g)
        • R(b);N_GUARD,XP(C)::S(E),XP(c)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(g);N_GUARD::B(F)
      • Refutation
        • P(i);XS(E)
  • Actual
    • B(F);P_PINP(h)
    • Threat
      • R1(G)
    • Vars
      • S(g);CHECK,N_GUARD::B(F),XS(g)
      • R(b);N_GUARD,XP(C)::S(E),XP(c)
      • P(i);OGATEB,XS(E)::B(F),XB(j)
      • P(d);OGATEB::QAR2(A),XP(d)
      • S(a);N_GUARD::QAB(A),XS(a)
      • S(a);N_GUARD::QAB(A)
      • S(g);N_GUARD::B(F)
      • P(i);OGATEB::B(F),XB(j)
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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).