MESON Chess Problem Database

Problem Display
PID: 98989 (6b1/p2B4/4R2p/rRq1N1bP/4k2p/pPp4P/2K1N1P1/8 w - - 0 1)

Apro, Laszlo

Sakkelet, 1999

6b1/p2B4/4R2p/rRq1N1bP/4k2p/pPp4P/2K1N1P1/8

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sg4#
    • 1...Qg1
      • 2.Sf7#
    • 1...Qf2
      • 2.Sf7#
    • 1...Qe3
      • 2.Sf7#
    • 1...Qb4
      • 2.Sf7#
    • 1...Qf8
      • 2.Sf7#
    • 1...Qxe5
      • 2.Rexe5#
    • 1...Qc8
      • 2.Sf7#
  • Tries
    • 1.Sd3+?
      • 1...Kd5
        • 2.Sb4#
      • 1...Kf5
        • 2.Sd4#
      • 1...Qe5
        • 2.Rexe5#
      • 1...Bxe6!
    • 1.Sf3+?
      • 1...Kd5
        • 2.Sxc3#
      • 1...Kf5
        • 2.Sfd4#
      • 1...Qe5
        • 2.Rexe5#
      • 1...Bxe6!
    • 1.Sc4+?
      • 1...Kd5
        • 2.Re5#
      • 1...Kf5
        • 2.Sd6#
      • 1...Qe5
        • 2.Rexe5#
      • 1...Bxe6!
    • 1.Sc6+?
      • 1...Kd5
        • 2.Sxc3#
        • 2.Sb4#
      • 1...Kf5
        • 2.Scd4#
      • 1...Qe5
        • 2.Rexe5#
      • 1...Bxe6!
  • Keys
    • 1.Sf7+!
      • 1...Kd5
        • 2.Re5#
      • 1...Kf5
        • 2.Sd6#
      • 1...Qe5
        • 2.Rexe5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • K(c);P-FLIGHT::R(I)+S(G),DCHECK
    • Q(f);N_GUARD::R(I)+S(G)
    • Q(f);N_GUARD,P_PINS(B)::R(I)+S(G)
    • Q(f);N_GUARD,SBLOCK::R(I)+S(G)
    • Q(f);OGATE,P_SPINQ(f),XS(G)::R1(I),XQ(f)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P_SPINQ(f),S_FLIGHT::S(G)
        • K(c);P_SPINQ(f),S_FLIGHT::S(B)
        • Q(f);N_GUARD,P_SPINQ(f)::R1(I),XQ(f)
      • Refutation
        • B(j);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P_SPINQ(f),S_FLIGHT::S(B),XP(b)
        • K(c);P_SPINQ(f),S_FLIGHT::S(G)
        • Q(f);N_GUARD,P_SPINQ(f)::R1(I),XQ(f)
      • Refutation
        • B(j);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P_SPINQ(f),S_FLIGHT::R1(I)
        • K(c);P_SPINQ(f),S_FLIGHT::S(G)
        • Q(f);N_GUARD,P_SPINQ(f)::R1(I),XQ(f)
      • Refutation
        • B(j);XR(I)
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P_SPINQ(f),S_FLIGHT::S(G)
        • Q(f);N_GUARD,P_SPINQ(f)::R1(I),XQ(f)
      • Refutation
        • B(j);XR(I)
  • Actual
    • S(G);CHECK
    • Vars
      • K(c);P_SPINQ(f),S_FLIGHT::R1(I)
      • K(c);P_SPINQ(f),S_FLIGHT::S(G)
      • Q(f);N_GUARD,P_SPINQ(f)::R1(I),XQ(f)
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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).