MESON Chess Problem Database

Problem Display
PID: 203303 (2b3B1/B3r2p/p4n1N/p3p3/4kPpK/6Pp/r7/2b1N1Q1 w - - 0 1)

Stemmer, A

Arbeiter Schachzeitung, 1924

2b3B1/B3r2p/p4n1N/p3p3/4kPpK/6Pp/r7/2b1N1Q1

#2

8 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qh1#
    • 1...Rd2
      • 2.Qe3#
    • 1...Ra4
      • 2.Qh1#
    • 1...Bb2
      • 2.Qe3#
      • 2.Qh1#
    • 1...Bd2
      • 2.Qh1#
    • 1...Ba3
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...exf4
      • 2.Qd4#
  • Tries
    • 1.Bxa2?
      • threat
        • 2.Qh1#
      • 1...exf4
        • 2.Qd4#
      • 1...Rxa7!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qc4#
      • 1...Rxa7
        • 2.Qxe5#
      • 1...exf4
        • 2.Qd4#
      • 1...Rc2
        • 2.Qxc2#
      • 1...Rd2
        • 2.Qe3#
      • 1...Ra4
        • 2.Qc2#
      • 1...Rc7
        • 2.Qxe5#
      • 1...Rd7
        • 2.Qxe5#
      • 1...Bb2
        • 2.Qe3#
        • 2.Qc2#
      • 1...Be3
        • 2.Qxe3#
      • 1...Be6
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::QAB(B)
    • R(b);S_CUTB(a)::QAR1(B)
    • B(a);S_CUTR(b)::QAB(B)
    • B(a);N_GUARD::QAR1(B)
    • B(a);N_GUARD::QAR1(B),XB(a)
    • P(g);N_GUARD,XP(D)::QAR1(B)
  • Tries
    • Try
      • B(H);XR(b)
      • Threat
        • QAB(B)
      • Vars
        • P(g);N_GUARD,XP(D)::QAR1(B)
      • Refutation
        • R(j);XB(G)
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • R(j);N_GUARD,XB(G)::QAR1(B),XP(g)
      • P(g);N_GUARD,XP(D)::QAR1(B)
      • R(b);N_GUARD::QAB(B),XR(b)
      • R(b);S_CUTB(a)::QAR1(B)
      • R(b);N_GUARD::QAB(B)
      • R(j);N_GUARD::QAR1(B),XP(g)
      • B(a);N_GUARD::QAR1(B),XB(a)
      • B(l);S_CUTR(j)::QAR1(B),XP(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).