MESON Chess Problem Database

Problem Display
PID: 260934 (k7/2Bp1K2/1p1N4/1N3p2/1RB4n/1p2p2p/p1rb4/5Q2 w - - 0 1)

Hoffmann, Martin Wolfgang

Comm., Neue Zurcher Zeitung, 2011

k7/2Bp1K2/1p1N4/1N3p2/1RB4n/1p2p2p/p1rb4/5Q2

#2

7 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Bd5#
    • 1...Rc3
      • 2.Ra4#
    • 1...Bc1
      • 2.Ra4#
    • 1...Bc3
      • 2.Bd5#
    • 1...Sg2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sg6
      • 2.Qh1#
      • 2.Qf3#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg8#
      • 1...Sg6
        • 2.Qh1#
      • 1...Sg2!
    • 1.Qh1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sg2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qh8#
      • 1...Rb2
        • 2.Bd5#
      • 1...Rc3
        • 2.Ra4#
      • 1...Bc3
        • 2.Bd5#
      • 1...Sg6
        • 2.Qh1#
      • 1...b2
        • 2.Qxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::B(C)
    • R(b);S_CUTB(c)::R(B)
    • B(c);N_GUARD::R(B)
    • B(c);S_CUTR(b)::B(C)
    • S(g);N_GUARD::QAB(A)
    • S(g);N_GUARD::QAB(A),XS(g)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • S(g);N_GUARD::QAB(A)
      • Refutation
        • S(g);
    • Try
      • Q(A);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB(A),XS(g)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • Q(A);P_PINP(a)
    • Threat
      • QAB1(A)
    • Vars
      • R(b);N_GUARD::B(C)
      • R(b);S_CUTB(c)::R(B)
      • B(c);S_CUTR(b)::B(C)
      • S(g);N_GUARD::QAB(A)
      • P(d);N_GUARD,S_CUTR(b)::QAR(A),XP(a)
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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).