MESON Chess Problem Database

Problem Display
PID: 10846 (Q7/1RBp1K2/r3P3/1PbkNp2/6p1/2PP2P1/6R1/3N1r1B w - - 0 1)

Hannelius, Jan Ingvar

Europe Echecs, 1969

Q7/1RBp1K2/r3P3/1PbkNp2/6p1/2PP2P1/6R1/3N1r1B

#2

13 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd1
      • 2.Rg1#
    • 1...Rg1
      • 2.Rxg1#
    • 1...Rf2
      • 2.Rxf2#
    • 1...Ra1
      • 2.Ra7#
    • 1...Ra2
      • 2.Ra7#
      • 2.Qxa2#
    • 1...Ra3
      • 2.Ra7#
    • 1...Ra4
      • 2.Ra7#
    • 1...Ra5
      • 2.Ra7#
    • 1...Rb6
      • 2.Rxb6#
      • 2.Qa2#
    • 1...Rc6
      • 2.Qa2#
    • 1...Rxe6
      • 2.Qa2#
    • 1...Ra7
      • 2.Rxa7#
  • Tries
    • 1.Rb8+?
      • 1...Rc6
        • 2.Qa2#
      • 1...Rxa8!
  • Keys
    • 1.Sxd7!
      • threat
        • 2.Sf6#
      • 1...Rxe6
        • 2.Qa2#
      • 1...Rd6
        • 2.Qa2#
      • 1...Bg1
        • 2.Rf2#
      • 1...Bf2
        • 2.Rg1#
      • 1...Ba3
        • 2.Se3#
      • 1...Be3
        • 2.Sxe3#
      • 1...Bb4
        • 2.Se3#
      • 1...Bd4
        • 2.c4#
      • 1...Bb6
        • 2.Ra7#
      • 1...Bd6
        • 2.Se3#
      • 1...Ba7
        • 2.Rb6#
      • 1...Be7
        • 2.Se3#
      • 1...Bf8
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD,XS(A)::B(B)+R(C)
    • R(a);N_GUARD::B(B)+R(C),XR(a)
    • R(f);N_GUARD::QAB(M)+R(J)
    • R(f);OGATE::QAB(M)
    • R(f);OGATE,XP(I)::QAB(M)
    • R(f);N_GUARD::QAB(M)+R(J),XR(f)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • R(f);OGATE,P_SPINR(f)::QAB(M)
      • Refutation
        • R(f);XQ(M)
  • Actual
    • S(H);XP(g)
    • Threat
      • S(H)
    • Vars
      • R(f);OGATE,XP(I)::QAB(M)
      • R(f);OGATE::QAB(M)
      • B(c);S_CUTR(a)::B(B)+R(C)
      • B(c);N_GUARD::S(A)
      • B(c);N_GUARD::S(A),XB(c)
      • B(c);SBLOCK::P(D)
      • B(c);S_CUTR(f)::QAB(M)+R(J)
HTML5 logo

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).