MESON Chess Problem Database

Problem Display
PID: 260990 (8/bB1Rp3/p5K1/2p1k1pp/r3p2p/qn2Qn1r/3N1N2/8 w - - 0 1)

Schneider, Johann Bernhard Michael

Neue Zurcher Zeitung, 1974

8/bB1Rp3/p5K1/2p1k1pp/r3p2p/qn2Qn1r/3N1N2/8

#2

6 + 14

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qxe4#
    • 1...Sbd4
      • 2.Qxe4#
    • 1...Sfd4
      • 2.Qxe4#
    • 1...c4
      • 2.Qxe4#
    • 1...e6
      • 2.Sd3#
  • Tries
    • 1.Sfxe4?
      • threat
        • 2.Rxe7#
      • 1...Ke6
        • 2.Sxc5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sbd4
        • 2.Sc3#
      • 1...Sfd4
        • 2.Sg3#
      • 1...c4
        • 2.Sc5#
      • 1...e6!
    • 1.Qxg5+?
      • 1...Ke6
        • 2.Qxe7#
        • 2.Qd5#
        • 2.Qf5#
      • 1...Sxg5!
  • Keys
    • 1.Sdxe4!
      • threat
        • 2.Rxe7#
      • 1...Ke6
        • 2.Sxc5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sbd4
        • 2.Sc3#
      • 1...Sfd4
        • 2.Sg3#
      • 1...c4
        • 2.Sc5#
      • 1...e6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::QAR1(C),XP(f)
    • S(b);S_CUTR(e)::QAR1(C),XP(f)
    • S(c);S_CUTR(e)::QAR1(C),XP(f)
    • P(h);S_CUTR(e)::QAR1(C),XP(f)
    • P(n);SBLOCK::S(B)
  • Tries
    • Try
      • S(B);XP(f)
      • Threat
        • R(F),XP(n)
      • Vars
        • K(i);P-FLIGHT::QAR(C)+S(B),DCHECK,XP(h)
        • R(e);OGATE,P_SPINR(e),XS(B)::QAR1(C),XR(e)
        • S(b);S_CUTR(e)::QAR(C)+S(B)
        • S(c);S_CUTR(e)::QAR(C)+S(B)
        • P(h);S_CUTR(e)::QAR(C)+S(B)
      • Refutation
        • P(n);
    • Try
      • Q(C);CHECK,N_PINP(f),XP(j)
      • Refutation
        • S(c);XQ(C)
  • Actual
    • S(A);XP(f)
    • Threat
      • R(F),XP(n)
    • Vars
      • K(i);P-FLIGHT::QAR(C)+S(A),DCHECK,XP(h)
      • R(e);OGATE,P_SPINR(e),XS(A)::QAR1(C),XR(e)
      • S(b);S_CUTR(e)::QAR(C)+S(A)
      • S(c);S_CUTR(e)::QAR(C)+S(A)
      • P(h);S_CUTR(e)::QAR(C)+S(A)
      • P(n);SBLOCK::S(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).