MESON Chess Problem Database

Problem Display
PID: 93132 (2r5/1Nb1N3/q7/1r2R3/3k1pB1/1P6/2P1pK2/4Q3 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Tidskrift for Schack, 1916

2r5/1Nb1N3/q7/1r2R3/3k1pB1/1P6/2P1pK2/4Q3

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb7
      • 2.Qa1#
    • 1...Qa1
      • 2.Sc6#
      • 2.Qxa1#
    • 1...Qa2
      • 2.Sc6#
    • 1...Qa3
      • 2.Sc6#
    • 1...Qa4
      • 2.Sc6#
    • 1...Qa5
      • 2.Sc6#
    • 1...Qb6
      • 2.Qa1#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qd6
      • 2.Qa1#
    • 1...Qe6
      • 2.Qa1#
    • 1...Qf6
      • 2.Qa1#
    • 1...Qg6
      • 2.Qa1#
    • 1...Qh6
      • 2.Qa1#
    • 1...Qa7
      • 2.Sc6#
    • 1...Qa8
      • 2.Sc6#
  • Tries
    • 1.Rd5+?
      • 1...Ke4
        • 2.Bf3#
        • 2.Bf5#
        • 2.Qxe2#
      • 1...Rxd5!
    • 1.c3+?
      • 1...Kd3
        • 2.Bf5#
      • 1...Kxe5!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Re4#
      • 1...Kxe5
        • 2.Qc3#
      • 1...Qxb7
        • 2.Qa1#
      • 1...Rxe5
        • 2.c3#
      • 1...Rxb7
        • 2.Rd5#
      • 1...Bxe5
        • 2.Qd2#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qe6
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(e);N_GUARD,XS(G)::QAB(A)
    • Q(e);N_GUARD::S(H)
    • Q(e);N_GUARD::QAB(A)
    • Q(e);N_GUARD::S(H),XQ(e)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • R(d);XR(F)
    • Try
      • P(B);CHECK
      • Vars
        • K(b);P-FLIGHT::B(E)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(F)
  • Actual
    • B(E);
    • Threat
      • R1(F)
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT,XR(F)::QAB(A)
      • Q(e);N_GUARD,XS(G)::QAB(A)
      • R(d);SBLOCK,XR(F)::P(B)
      • R(d);N_GUARD,XS(G)::R1(F)
      • B(f);SBLOCK,XR(F)::QAR2(A)
      • Q(e);N_GUARD::S(H),XQ(e)
      • Q(e);N_GUARD::QAB(A)
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).