MESON Chess Problem Database

Problem Display
PID: 67736 (4n2b/r1B3Qq/R3pn1p/1N2p1p1/2P1k1Bp/3p4/1K1P4/5R1N w - - 0 1)

Stolev, Nikola

StrateGems, 2006

4n2b/r1B3Qq/R3pn1p/1N2p1p1/2P1k1Bp/3p4/1K1P4/5R1N

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Qxg6#
    • 1...Sxg4
      • 2.Qxh7#
    • 1...Sd5
      • 2.Qxh7#
    • 1...Sh5
      • 2.Qxh7#
    • 1...Sd7
      • 2.Qxh7#
    • 1...Sg8
      • 2.Qxh7#
    • 1...h3
      • 2.Sg3#
  • Tries
    • 1.Sd6+?
      • 1...Kd4
        • 2.Bb6#
      • 1...Sxd6!
    • 1.Rf4+?
      • 1...exf4
        • 2.Sf2#
        • 2.Rxe6#
      • 1...gxf4
        • 2.Sf2#
      • 1...Kxf4!
    • 1.Qxg5?
      • threat
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
        • 2.Qxe5#
      • 1...Qxc7
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
        • 2.Qg6#
      • 1...Rxc7
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
      • 1...Sxg4
        • 2.Qxg4#
      • 1...Sxc7
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
      • 1...Qf5
        • 2.Re1#
        • 2.Qe3#
      • 1...Sd5
        • 2.Sf2#
        • 2.Bf3#
      • 1...Sh5
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
      • 1...Sd7
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
      • 1...Sg8
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
      • 1...Sd6
        • 2.Sf2#
        • 2.Bf3#
        • 2.Re1#
        • 2.Qe3#
      • 1...hxg5!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Re1#
      • 1...Kxe5
        • 2.Rxe6#
      • 1...Sxg4
        • 2.Sc3#
      • 1...Sd5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(j);N_GUARD::QAB(J),XQ(j)
    • S(g);N_GUARD,XB(F)::QAB(J),XQ(j)
    • S(g);N_GUARD::QAB(J),XQ(j)
    • P(c);N_GUARD::S(B)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(b);P-FLIGHT::B(I)
      • Refutation
        • S(k);XS(G)
    • Try
      • R(A);CHECK
      • Vars
        • P(e);SBLOCK,XR(A)::S(B)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(d),XR(A)
    • Try
      • Q(J);XP(e)
      • Threat
        • DUALS(5)
      • Vars
        • S(g);OGATE,XB(F)::QAR2(J),XS(g)
      • Refutation
        • P(h);XQ(J)
  • Actual
    • B(I);XP(d)
    • Threat
      • R(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINS(g),XB(I)::R1(H),XP(f)
      • S(g);XB(F)::S(G)
      • S(g);::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).