MESON Chess Problem Database

Problem Display
PID: 266560 (1B6/4Rp2/4np1K/5k1p/R1n3pP/2N1p3/5NQ1/1b6 w - - 0 1)

Schonholzer, Andreas

Schweizerische Schachzeitung, 2020

1B6/4Rp2/4np1K/5k1p/R1n3pP/2N1p3/5NQ1/1b6

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sb2
      • 2.Qd5#
    • 1...Sd2
      • 2.Qd5#
    • 1...Sa3
      • 2.Qd5#
    • 1...Sa5
      • 2.Qd5#
    • 1...Sd6
      • 2.Qd5#
    • 1...g3
      • 2.Qh3#
  • Tries
    • 1.Sfe4?
      • threat
        • 2.Sg3#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Sc7
        • 2.Qf1#
      • 1...g3
        • 2.Qh3#
      • 1...Sd6!
    • 1.Se2?
      • threat
        • 2.Sg3#
      • 1...Sd6
        • 2.Qd5#
      • 1...g3
        • 2.Sxg3#
        • 2.Qh3#
      • 1...Sc7!
    • 1.Rxc4?
      • threat
        • 2.Qd5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Sc7!
    • 1.Qf3+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...gxf3!
  • Keys
    • 1.Sh1!
      • threat
        • 2.Sg3#
      • 1...Sd6
        • 2.Qd5#
      • 1...Sc7
        • 2.Qf1#
      • 1...g3
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • S(c);N_GUARD::QAR2(B)
    • P(d);OGATEB::QAB(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • B(a);OGATE,XS(A)::QAB1(B),XB(a)
        • S(g);N_GUARD::QAR(B)
        • P(d);OGATEB::QAB(B)
      • Refutation
        • S(c);
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • S(c);N_GUARD::QAR2(B)
      • Refutation
        • S(g);
    • Try
      • R(D);XS(c)
      • Threat
        • QAR2(B)
      • Vars
        • B(a);N_GUARD::QAB1(B),XB(a)
        • S(g);N_GUARD::R1(D),XS(g)
      • Refutation
        • S(g);
    • Try
      • Q(B);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(B),XS(g)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • S(c);N_GUARD::QAR2(B)
      • S(g);N_GUARD::QAR(B)
      • P(d);OGATEB::QAB(B)
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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).