MESON Chess Problem Database

Problem Display
PID: 189460 (8/4bp2/bQ3Rp1/2p1k1pn/2P1p1Br/2K4p/8/n7 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Tidskrift for Schack, 1911

8/4bp2/bQ3Rp1/2p1k1pn/2P1p1Br/2K4p/8/n7

#2

5 + 12

6490 yacpdb 2019
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Qxd6#
    • 1...Bxf6
      • 2.Qc7#
      • 2.Qb8#
    • 1...Bd8
      • 2.Qd6#
  • Tries
    • 1.Qxc5+?
      • 1...Kxf6
        • 2.Qd4#
      • 1...Bxc5!
    • 1.Qc7+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Kxf6!
    • 1.Qb8+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Kxf6!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Kd2#
      • 1...Kxf6
        • 2.Kd2#
      • 1...Bxc4
        • 2.Kxc4#
      • 1...Bxf6
        • 2.Qb8#
      • 1...Sxf6
        • 2.Qh2#
      • 1...e3
        • 2.Kd3#
      • 1...Sc2
        • 2.Kxc2#
      • 1...Sb3
        • 2.Kxb3#

Anticipated by 41896(1896), 121335(1896)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • B(k);N_GUARD::QAB1(D),XB(k)
    • B(k);N_GUARD::QAB1(D)
  • Tries
    • Try
      • Q(D);CHECK,XP(e)
      • Vars
        • K(f);S_FLIGHT,XR(E)::QAB(D)
      • Refutation
        • B(k);XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • B(k);N_GUARD,P_SPINB(k)::QAB1(D),XB(k)
      • Refutation
        • K(f);S_FLIGHT,XR(E)
    • Try
      • Q(D);CHECK
      • Vars
        • B(k);N_GUARD,P_SPINB(k)::QAB1(D),XB(k)
      • Refutation
        • K(f);S_FLIGHT,XR(E)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)+K(A)
    • Vars
      • K(f);S_FLIGHT,XR(E)::QAB(D)+K(A)
      • B(i);XP(B)::QAB(D)+K(A),XB(i)
      • B(k);N_GUARD,SBLOCK,XR(E)::QAB(D)
      • S(h);N_GUARD,SBLOCK,XR(E)::QAB(D)
      • P(c);::QAB(D)+K(A)
      • S(a);::QAB(D)+K(A),XS(a)
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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).