MESON Chess Problem Database

Problem Display
PID: 101208 (8/4BQ2/1r2pK2/8/pNkNR3/2q2p2/4PP2/2RB4 w - - 0 1)

Rothstein, Louis

Good Companions, 1920

8/4BQ2/1r2pK2/8/pNkNR3/2q2p2/4PP2/2RB4

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Rxc2#
    • 1...Rxb4
      • 2.Qxe6#
    • 1...Rb7
      • 2.Qxe6#
    • 1...Rb8
      • 2.Qxe6#
    • 1...fxe2
      • 2.Bxe2#
    • 1...a3
      • 2.Bb3#
  • Tries
    • 1.Bxa4?
      • threat
        • 2.Bb3#
      • 1...Qxc1
        • 2.Sb5#
      • 1...Rxb4
        • 2.Qxe6#
      • 1...Qc2
        • 2.Sb5#
        • 2.Rxc2#
      • 1...Rd6!
    • 1.Qh5?
      • threat
        • 2.Qc5#
      • 1...Rd6
        • 2.Qb5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rc6
        • 2.Qb5#
      • 1...e5+!
  • Keys
    • 1.Qe8!
      • 1...e5+
        • 2.Se6#
      • 1...Qxc1
        • 2.Sb5#
      • 1...Rxb4
        • 2.Qc6#
      • 1...fxe2
        • 2.Bxe2#
      • 1...Qc2
        • 2.Rxc2#
      • 1...Rd6
        • 2.Qb5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Ra6
        • 2.Qb5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Rb7
        • 2.Qc6#
      • 1...Rb8
        • 2.Qc6#
      • 1...a3
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_PINS(F),OGATEB::R(A),XQ(a)
    • R(e);N_GUARD,XS(E)::QAB(J),XP(f)
    • R(e);N_GUARD::QAB(J),XP(f)
    • P(b);OGATE,XP(C)::B(B),XP(b)
    • P(c);N_GUARD::B(B)
  • Tries
    • Try
      • B(B);XP(c)
      • Threat
        • B(B)
      • Vars
        • Q(a);N_PINS(F),N_SPINQ(a),XR(A)::R(G)+S(F)
        • R(e);N_GUARD,XS(E)::QAB(J),XP(f)
      • Refutation
        • R(e);
    • Try
      • Q(J);N_PINP(f)
      • Threat
        • QAR1(J)
      • Vars
        • R(e);N_GUARD::QAB1(J)
        • R(e);N_GUARD::QAB1(J),XR(e)
      • Refutation
        • P(f);CHECK,N_PINS(F)
  • Actual
    • Q(J);N_PINP(f)
    • Vars
      • P(f);CHECK,N_PINS(F)::R(G)+S(F)
      • Q(a);N_PINS(F),N_SPINQ(a),XR(A)::R(G)+S(F)
      • R(e);N_GUARD,XS(E)::QAR2(J)
      • P(b);OGATE,XP(C)::B(B),XP(b)
      • Q(a);N_PINS(F),OGATEB::R(A),XQ(a)
      • R(e);N_GUARD::QAB1(J)
      • R(e);N_GUARD::QAB1(J),XR(e)
      • R(e);N_GUARD::QAR2(J),XR(e)
      • R(e);N_GUARD::QAR2(J)
      • P(c);N_GUARD::B(B)
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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).