MESON Chess Problem Database

Problem Display
PID: 184773 (8/2NRp3/3rP2p/KQ6/nP1k4/1b1B4/4P3/2B5 w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1908

8/2NRp3/3rP2p/KQ6/nP1k4/1b1B4/4P3/2B5

#2

9 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc3
      • 2.Qc5#
      • 2.e3#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
  • Tries
    • 1.Bb2+?
      • 1...Sxb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Ke3!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Bxc4!
    • 1.Qf5?
      • threat
        • 2.Sb5#
      • 1...Kc3
        • 2.Sb5#
      • 1...Sc3
        • 2.Qc5#
        • 2.e3#
      • 1...Bc4!
    • 1.Qg5?
      • threat
        • 2.Sb5#
        • 2.Qg7#
      • 1...Rd5+
        • 2.Sb5#
      • 1...Kc3
        • 2.Sb5#
      • 1...Bc4
        • 2.Qg7#
      • 1...Sc3
        • 2.Be3#
        • 2.Qe3#
        • 2.Qc5#
        • 2.Qg7#
      • 1...hxg5!
    • 1.Qh5?
      • threat
        • 2.Sb5#
      • 1...Kc3
        • 2.Sb5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Bc4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qh8#
      • 1...Rd5+
        • 2.Sb5#
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::QAB1(F)
    • S(b);N_GUARD::QAB1(F),XS(b)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • S(b);XB(A)::QAB1(F)
        • S(b);P_SPINS(b)::QAB1(F)
      • Refutation
        • K(c);N_SPINR(d),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);N_SPINR(d),OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • B(a);XQ(F)
    • Try
      • Q(F);
      • Threat
        • S(H)
      • Vars
        • K(c);N_SPINR(d),S_FLIGHT::S(H)
      • Refutation
        • B(a);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);CHECK::S(H)
        • K(c);N_SPINR(d),S_FLIGHT::S(H)
        • B(a);::QAB(F)
      • Refutation
        • P(e);XQ(F)
    • Try
      • Q(F);
      • Threat
        • S(H)
      • Vars
        • K(c);N_SPINR(d),S_FLIGHT::S(H)
        • S(b);N_GUARD::QAB1(F)
      • Refutation
        • B(a);
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • R(d);CHECK::S(H)
      • K(c);N_SPINR(d),S_FLIGHT::S(H)
      • K(c);N_SPINR(d),S_FLIGHT::QAB(F)
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).