MESON Chess Problem Database

Problem Display
PID: 234183 (8/2p1n3/K1B1Q1q1/n1k1Bp2/1p2PN2/1p1P4/8/5b2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Berliner Morgenpost, 1975

8/2p1n3/K1B1Q1q1/n1k1Bp2/1p2PN2/1p1P4/8/5b2

#2

7 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.d4#
    • 1...Bxd3+
      • 2.Sxd3#
    • 1...Bh3
      • 2.d4#
    • 1...Sc4
      • 2.Qxc4#
      • 2.d4#
    • 1...Saxc6
      • 2.Qc4#
    • 1...Sb7
      • 2.Qc4#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sexc6
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
  • Tries
    • 1.Qxe7+?
      • 1...Kxc6
        • 2.Qxc7#
      • 1...Qd6!
  • Keys
    • 1.Bb5!
      • threat
        • 2.d4#
      • 1...Qxe6+
        • 2.Sxe6#
      • 1...Bxd3
        • 2.Sxd3#
      • 1...Qg1
        • 2.Qxe7#
      • 1...Sac6
        • 2.Qc4#
      • 1...Sec6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(a);N_PINP(A)::P(A)
    • B(a);CHECK,XP(A)::S(C),XB(a)
    • S(d);N_GUARD,SBLOCK,XB(F)::QAR1(G)
    • S(d);N_GUARD::QAR1(G)
    • S(i);N_GUARD::QAR1(G),XS(i)
    • S(i);N_GUARD,XB(F)::QAR1(G)
    • S(i);N_GUARD::QAR1(G)
  • Tries
    • Try
      • Q(G);CHECK,P_SPINB(F),XS(i)
      • Vars
        • K(e);OGATEB,P-FLIGHT,XB(F)::QAR1(G),XP(h)
      • Refutation
        • Q(g);P_SPINQ(g)
  • Actual
    • B(F);N_SPINP(A),P_SPINQ(G)
    • Threat
      • P(A)
    • Vars
      • Q(g);CHECK,XQ(G)::S(C),XQ(g)
      • B(a);P_PINB(F),XP(A)::S(C),XB(a)
      • Q(g);N_PINQ(G)::QAB(G),XS(i)
      • S(d);N_PINQ(G)::QAR1(G)
      • S(i);N_PINQ(G)::QAR1(G)
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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).