MESON Chess Problem Database

Problem Display
PID: 261624 (2N2RB1/3k3r/1Pp2P2/3Np1n1/r6p/1Q6/1b6/3R3K w - - 0 1)

Ott, Thierry

Schweizerische Schachzeitung, 1978

2N2RB1/3k3r/1Pp2P2/3Np1n1/r6p/1Q6/1b6/3R3K

#2

9 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sc3#
    • 1...Ra3
      • 2.Sc3#
    • 1...Ra6
      • 2.Sc3#
    • 1...Ra7
      • 2.Sc3#
    • 1...Ra8
      • 2.Sc3#
    • 1...Ba3
      • 2.Sb4#
    • 1...Se4
      • 2.Qh3#
    • 1...cxd5
      • 2.Qxa4#
      • 2.Qxd5#
      • 2.Qb5#
    • 1...c5
      • 2.Qxa4#
      • 2.Qb5#
  • Tries
    • 1.Qh3+?
      • 1...Rg4
        • 2.Sc3#
      • 1...Se6
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Sxh3!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qd6#
      • 1...Rxa3
        • 2.Sc3#
      • 1...Bxa3
        • 2.Sb4#
      • 1...Sf7
        • 2.Qe7#
      • 1...c5
        • 2.Qxa4#
      • 1...Rb4
        • 2.Qa7#
      • 1...Se4
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::R(A)+S(D)
    • B(a);N_GUARD::R(A)+S(D)
    • S(e);N_GUARD,S_CUTR(b)::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(A)+S(D)
      • Refutation
        • S(e);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • R(b);N_GUARD,XQ(C)::R(A)+S(D)
      • B(a);N_GUARD,XQ(C)::R(A)+S(D)
      • S(e);S_CUTR(h)::QAR1(C)
      • P(f);OGATEB::QAB(C),XR(b)
      • R(b);OGATE::QAR(C)
      • S(e);N_GUARD,S_CUTR(b)::QAB(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).