MESON Chess Problem Database

Problem Display
PID: 271174 (K1Q4B/p7/3p4/3kp2R/1Pp1b1N1/8/4PqB1/5N2 w - - 0 1)

Bottiger, W

Schackvarlden, 1935

K1Q4B/p7/3p4/3kp2R/1Pp1b1N1/8/4PqB1/5N2

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sf6#
  • Tries
    • 1.Rxe5+?
      • 1...dxe5
        • 2.Qd7#
      • 1...Kd4+!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Qxc4#
      • 1...Kd4+
        • 2.Sc6#
      • 1...Qxe2
        • 2.Sg4#
      • 1...dxe5
        • 2.Qd7#
      • 1...Qd4
        • 2.Qg8#
      • 1...Qc5
        • 2.Sd3#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sf7#
      • 1...Qf8
        • 2.Sf7#
      • 1...c3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • R(F);CHECK,XP(e)
      • Vars
        • P(f);XR(F)::QAR2(H)
      • Refutation
        • K(d);CHECK,N_SPINB(c),P-FLIGHT
  • Actual
    • S(E);XP(e)
    • Threat
      • QAB1(H),XP(b)
    • Vars
      • K(d);CHECK,N_SPINB(c),P-FLIGHT::B(I)+S(E),DCHECK
      • Q(a);N_GUARD,XP(B)::R(F)+S(E)
      • P(f);OGATEB,P_SPINP(f),XS(E)::QAR2(H)
      • Q(a);N_GUARD,SBLOCK::QAB(H)
      • Q(a);N_GUARD,P_PINQ(H)::R(F)+S(E)
      • P(b);::QAB1(H)
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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).