MESON Chess Problem Database

Problem Display
PID: 261508 (1n6/5KQ1/2P1P3/N3RP1p/1p1k4/1pq5/1n1pP3/B2N4 w - - 0 1)

Johner, Hans

Neue Zurcher Zeitung, 1965

1n6/5KQ1/2P1P3/N3RP1p/1p1k4/1pq5/1n1pP3/B2N4

#2

10 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.e3#
    • 1...Sc4
      • 2.Sxb3#
  • Tries
    • 1.Sxc3?
      • threat
        • 2.Sb5#
      • 1...Kxc3
        • 2.Rc5#
      • 1...bxc3!
    • 1.Qg1+?
      • 1...Qe3
        • 2.Bxb2#
        • 2.Qxe3#
      • 1...Kxe5!
  • Keys
    • 1.Kf6!
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Qxc6
        • 2.Qg1#
      • 1...Sxd1
        • 2.Qa7#
      • 1...Sxc6
        • 2.Qd7#
      • 1...Qc1
        • 2.Qg1#
      • 1...Qc2
        • 2.Qg1#
      • 1...Qd3
        • 2.Qa7#
      • 1...Qe3
        • 2.Qa7#
      • 1...Qf3
        • 2.Qa7#
      • 1...Qg3
        • 2.Qa7#
      • 1...Qh3
        • 2.Qa7#
      • 1...Qc4
        • 2.Qg1#
      • 1...Qc5
        • 2.Qg1#
      • 1...Sd3
        • 2.e3#
      • 1...Sa4
        • 2.Qg1#
      • 1...Sc4
        • 2.Sxb3#
      • 1...Sa6
        • 2.Qd7#
      • 1...h4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 16
    • REMOVED MATES = 0
  • Sets
    • S(a);P_SPINQ(d),SBLOCK::P(C)
    • S(a);P_SPINQ(d),SBLOCK::S(D),XP(c)
  • Tries
    • Try
      • S(B);XQ(d)
      • Threat
        • S(B)
      • Vars
        • K(f);N_GUARD,P_SPINS(a),S_FLIGHT,XS(B)::QAB(J)+R(E),DCHECK
      • Refutation
        • P(e);XS(B)
    • Try
      • Q(J);CHECK
      • Refutation
        • K(f);S_FLIGHT,XR(E)
  • Actual
    • K(I);P-FLIGHT
    • Vars
      • S(h);CHECK,N_GUARD::QAR(J),XS(h)
      • Q(d);N_GUARD,P_PINP(H),P_SPINS(a),XP(G)::QAB(J)
      • S(a);P_SPINQ(d),XS(B)::QAB(J)
      • S(h);N_GUARD,XP(G)::QAR(J)
      • Q(d);N_GUARD,P_SPINS(a)::QAB(J)
      • Q(d);N_GUARD,P_PINP(F),P_SPINS(a)::QAB(J)
      • S(a);P_SPINQ(d),SBLOCK::P(C)
      • S(a);P_SPINQ(d)::QAB(J)
      • S(a);P_SPINQ(d),SBLOCK::S(D),XP(c)
      • S(h);N_GUARD::QAR(J)
      • P(g);N_GUARD::QAR(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).