MESON Chess Problem Database

Problem Display
PID: 117124 (2b1n3/R2P2r1/4kPB1/b2N1ppQ/q1NR4/Bp4n1/8/6K1 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Zadachi i Etyudi, 1928

2b1n3/R2P2r1/4kPB1/b2N1ppQ/q1NR4/Bp4n1/8/6K1

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Bxf7#
    • 1...Rg8
      • 2.Bf7#
    • 1...Be1
      • 2.d8S#
    • 1...Bd2
      • 2.d8S#
    • 1...Bc3
      • 2.d8S#
    • 1...Bb4
      • 2.d8S#
    • 1...Sh1
      • 2.Qe2#
    • 1...Se2+
      • 2.Qxe2#
  • Tries
    • 1.dxc8Q+?
      • 1...Rd7
        • 2.Bf7#
      • 1...Qd7!
    • 1.dxc8B+?
      • 1...Rd7
        • 2.Bf7#
      • 1...Qd7!
    • 1.dxe8Q+?
      • 1...Re7
        • 2.Bf7#
        • 2.Rxe7#
        • 2.Qxe7#
      • 1...Qxe8!
    • 1.dxe8R+?
      • 1...Re7
        • 2.Bf7#
        • 2.Raxe7#
        • 2.Rexe7#
      • 1...Qxe8!
  • Keys
    • 1.f7!
      • threat
        • 2.f8S#
      • 1...Se2+
        • 2.Qxe2#
      • 1...Qxa3
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Qxc4
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Rxg6
        • 2.fxe8Q#
      • 1...Rxf7
        • 2.Bxf7#
      • 1...Qb4
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Rg8
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Bb4
        • 2.d8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(h);N_GUARD::B(H),XR(h)
    • R(h);N_GUARD::B(H)
    • B(d);N_GUARD::P=S
    • S(b);N_GUARD::QAR(F)
    • S(b);CHECK,N_GUARD::QAR(F),XS(b)
  • Tries
    • Try
      • P(J);CHECK,XB(i)
      • Vars
        • R(h);P_SPINR(h)::B(H)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • P(J);CHECK,XB(i)
      • Vars
        • R(h);P_SPINR(h)::B(H)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • P(J);CHECK,XS(j)
      • Refutation
        • Q(c);XQ(J)
    • Try
      • P(J);CHECK,XS(j)
      • Refutation
        • Q(c);XR(J)
  • Actual
    • P(G);
    • Threat
      • P=S
    • Vars
      • S(b);CHECK,N_GUARD::QAR(F),XS(b)
      • Q(c);N_GUARD,XB(B)::PXB(i)=Q
      • Q(c);N_GUARD,XS(C)::PXS(j)=Q
      • R(h);N_GUARD,XB(H)::PXS(j)=Q
      • R(h);OGATE,XP(G)::B(H),XR(h)
      • Q(c);N_GUARD::PXB(i)=Q
      • R(h);OGATE::PXR(h)=Q
      • B(d);N_GUARD::P=S
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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).