MESON Chess Problem Database

Problem Display
PID: 81632 (4R1K1/b2P2Q1/3pB3/2npBP1N/2r1kpPp/1n3R2/p1P3P1/1N6 w - - 0 1)

Navon, Emanuel

HM., Zappas MT, 2008

4R1K1/b2P2Q1/3pB3/2npBP1N/2r1kpPp/1n3R2/p1P3P1/1N6

#2

13 + 10

56 The Problemist 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Sxc3#
    • 1...Ra4
      • 2.Sc3#
    • 1...Rb4
      • 2.Sc3#
    • 1...Rd4
      • 2.Sc3#
    • 1...Sa1
      • 2.Sd2#
    • 1...Sc1
      • 2.Sd2#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sd4
      • 2.Sd2#
    • 1...Sa5
      • 2.Sd2#
    • 1...Sd3
      • 2.cxd3#
  • Tries
    • 1.Ba1?
      • threat
        • 2.Sf6#
      • 1...Sxa1
        • 2.Sd2#
      • 1...Sxd7
        • 2.Bxd7#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Rd4
        • 2.Sc3#
      • 1...Sd4
        • 2.Sd2#
      • 1...d4!
    • 1.Bb2?
      • threat
        • 2.Sf6#
      • 1...Sxd7
        • 2.Bxd7#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Rd4
        • 2.Sc3#
      • 1...Sd4
        • 2.Sd2#
      • 1...d4!
    • 1.Bd4?
      • threat
        • 2.Rxf4#
      • 1...Rxd4
        • 2.Sc3#
      • 1...Sxd4
        • 2.Sd2#
      • 1...Sd3
        • 2.cxd3#
      • 1...Rxc2!
  • Keys
    • 1.Bxf4!
      • threat
        • 2.Re3#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Sxd7
        • 2.Bxd7#
      • 1...d4
        • 2.Sf6#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sa4
        • 2.Bf7#
      • 1...Sa6
        • 2.Bf7#
      • 1...Sb7
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD::S(A),XR(c)
    • R(c);N_GUARD::S(A)
    • S(b);N_GUARD::S(A)
    • S(b);N_GUARD::S(A),XS(b)
    • S(g);OGATE::P(B),XS(g)
  • Tries
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • S(b);N_GUARD,XB(F)::S(A)
        • S(g);OGATE,XP(J)::R(L)+B(I),XS(g)
        • R(c);N_GUARD::S(A),XR(c)
        • R(c);N_GUARD::S(A)
        • S(b);N_GUARD::S(A)
      • Refutation
        • P(h);
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • S(g);OGATE,XP(J)::R(L)+B(I),XS(g)
        • R(c);N_GUARD::S(A),XR(c)
        • R(c);N_GUARD::S(A)
        • S(b);N_GUARD::S(A)
      • Refutation
        • P(h);
    • Try
      • B(F);
      • Threat
        • R1(D),XP(e)
      • Vars
        • R(c);N_GUARD,XB(F)::S(A)
        • S(b);N_GUARD,XB(F)::S(A)
        • S(g);OGATE::P(B),XS(g)
      • Refutation
        • R(c);XP(B)
  • Actual
    • B(F);XP(e)
    • Threat
      • R1(D)
    • Vars
      • S(g);OGATE,P_SPINS(g),XB(I)::R(L),XS(g)
      • S(g);OGATE,XP(J)::R(L)+B(I),XS(g)
      • P(h);SBLOCK::S(H)
      • R(c);N_GUARD::S(A),XR(c)
      • S(g);OGATE::P(B),XS(g)
      • S(g);N_GUARD::R(L)+B(I)
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).