MESON Chess Problem Database

Problem Display
PID: 176448 (1B3R2/8/5n2/1N4pB/1N1PpP2/2pnk3/2Q3PP/1q1R1bK1 w - - 0 1)

Hahnel, Peter

Schach-Echo, 1984

1B3R2/8/5n2/1N4pB/1N1PpP2/2pnk3/2Q3PP/1q1R1bK1

#2

12 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Sxc2#
    • 1...Be2
      • 2.Qxe2#
    • 1...Bxg2
      • 2.Qe2#
    • 1...Sc1
      • 2.Qf2#
    • 1...Se1
      • 2.Qf2#
    • 1...Sb2
      • 2.Qf2#
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sxb4
      • 2.Qf2#
    • 1...Sxf4
      • 2.Qf2#
    • 1...Sc5
      • 2.Qf2#
    • 1...Se5
      • 2.Qf2#
    • 1...Sg4
      • 2.Sd5#
    • 1...Sd5
      • 2.Sxd5#
    • 1...Sxh5
      • 2.Sd5#
    • 1...Sd7
      • 2.Sd5#
    • 1...Sh7
      • 2.Sd5#
    • 1...Se8
      • 2.Sd5#
    • 1...Sg8
      • 2.Sd5#
  • Tries
    • 1.Re1+?
      • 1...Be2
        • 2.Qxe2#
      • 1...Sxe1
        • 2.Qf2#
      • 1...Qxe1!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf5#
      • 1...Kxd4
        • 2.Ba7#
      • 1...Kxf4
        • 2.Sd5#
      • 1...Se5
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 17
  • Sets
    • Q(a);XQ(C)::S(F),XQ(a)
    • B(b);N_GUARD,P_PINR(A)::QAR1(C),XB(b)
    • B(b);N_GUARD,P_PINR(A),XP(D)::QAR1(C)
    • S(d);N_GUARD::QAB1(C)
    • S(d);N_GUARD::QAB1(C),XS(d)
    • S(d);N_GUARD,XS(F)::QAB1(C)
    • S(d);N_GUARD,XP(H)::QAB1(C)
    • S(h);N_GUARD::S(F)
    • S(h);N_GUARD::S(F),XS(h)
    • S(h);N_GUARD,XB(J)::S(F)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • B(b);N_GUARD,P_PINR(A),P_SPINB(b)::QAR1(C),XB(b)
        • S(d);XR(A)::QAB1(C)
      • Refutation
        • Q(a);XR(A)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(e);OGATEB,P_SPINS(d),S_FLIGHT,XP(G)::B(K)
      • K(e);P_SPINS(h),S_FLIGHT,XP(H)::S(F)
      • S(d);N_GUARD::QAB1(C)
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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).