MESON Chess Problem Database

Problem Display
PID: 244397 (2r5/b2rp3/4Np2/1B5R/1P2k3/q3PpBK/3R4/3NQ2n w - - 0 1)

Dittrich, Stefan

Schach, 1978

2r5/b2rp3/4Np2/1B5R/1P2k3/q3PpBK/3R4/3NQ2n

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2+
      • 2.Sxf2#
    • 1...Sxg3
      • 2.Sf2#
    • 1...f2
      • 2.Qxh1#
    • 1...f5
      • 2.Sg5#
  • Tries
    • 1.Bc7?
      • threat
        • 2.Qh4#
      • 1...Sf2+
        • 2.Sxf2#
      • 1...Qxe3
        • 2.Sc3#
      • 1...Bxe3
        • 2.Sc5#
      • 1...f2
        • 2.Qxh1#
      • 1...Sg3
        • 2.Sf2#
      • 1...f5
        • 2.Sg5#
      • 1...Rg8!
    • 1.Bc6+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...Rxc6!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Qh4#
      • 1...Sf2+
        • 2.Sxf2#
      • 1...Qxe3
        • 2.Bd3#
      • 1...Bxe3
        • 2.Rd4#
      • 1...f2
        • 2.Qxh1#
      • 1...Rg8
        • 2.Bc6#
      • 1...Sg3
        • 2.Sf2#
      • 1...f5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,N_GUARD::S(A),XS(a)
    • S(a);N_GUARD,XB(E)::S(A)
    • P(c);OGATEB::QAB(B),XS(a)
    • P(e);N_GUARD,SBLOCK::S(J)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR(B)
      • Vars
        • S(a);CHECK,N_GUARD::S(A),XS(a)
        • Q(b);N_GUARD,P_SPINQ(b),XP(D)::S(A)
        • B(f);N_GUARD,P_SPINB(f),XP(D)::S(J)
        • P(c);OGATEB,P_PINP(D)::QAB(B),XS(a)
        • S(a);N_GUARD::S(A)
        • P(e);N_GUARD,SBLOCK::S(J)
      • Refutation
        • R(i);
    • Try
      • B(H);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::B(H),XR(g)
      • Refutation
        • R(i);XB(H)
  • Actual
    • B(E);
    • Threat
      • QAR(B)
    • Vars
      • S(a);CHECK,N_GUARD::S(A),XS(a)
      • Q(b);N_GUARD,P_SPINQ(b),XP(D)::B(H)
      • B(f);N_GUARD,P_SPINB(f),XP(D)::R1(C)
      • P(c);OGATEB,P_PINP(D)::QAB(B),XS(a)
      • R(i);N_GUARD::B(H)
      • S(a);N_GUARD::S(A)
      • P(e);N_GUARD,SBLOCK::S(J)
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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).