MESON Chess Problem Database

Problem Display
PID: 180434 (n7/1ppQ4/1pNn1p2/1p1P4/1Pk1Pp2/2P2R2/2P2K2/b2N4 w - - 0 1)

Lider, Valentin Viktorovich

Schakend Nederland, 1975

n7/1ppQ4/1pNn1p2/1p1P4/1Pk1Pp2/2P2R2/2P2K2/b2N4

#2

10 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Sxb2#
    • 1...Bxc3
      • 2.Rxc3#
    • 1...f5
      • 2.Se5#
    • 1...bxc6
      • 2.Qxc6#
  • Tries
    • 1.Rxf4?
      • 1...Sxe4+
        • 2.Rxe4#
      • 1...Bxc3
        • 2.Se3#
      • 1...bxc6
        • 2.Qxc6#
      • 1...Sf5
        • 2.exf5#
      • 1...Sf7
        • 2.e5#
      • 1...Sc8
        • 2.e5#
      • 1...Se8
        • 2.e5#
      • 1...f5
        • 2.Se5#
      • 1...Bb2!
    • 1.Qxd6?
      • 1...Bxc3
        • 2.Rxc3#
      • 1...bxc6
        • 2.Qxc6#
      • 1...Bb2
        • 2.Sxb2#
      • 1...f5
        • 2.Se5#
      • 1...cxd6!
  • Keys
    • 1.Qe6!
      • 1...Sxe4+
        • 2.Qxe4#
      • 1...Bxc3
        • 2.Rxc3#
      • 1...bxc6
        • 2.dxc6#
      • 1...Sf5
        • 2.d6#
      • 1...Bb2
        • 2.Sxb2#
      • 1...Sf7
        • 2.d6#
      • 1...Sc8
        • 2.d6#
      • 1...Se8
        • 2.d6#
      • 1...f5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::S(A),XB(a)
    • B(a);OGATE,XP(D)::R1(E),XB(a)
    • P(g);N_GUARD::S(I)
    • P(h);OGATE,XS(I)::QAR2(J),XP(h)
  • Tries
    • Try
      • R(E);XP(c)
      • Vars
        • S(f);CHECK,OGATE,P_SPINS(f),XP(G)::R(E),XS(f)
        • B(a);SBLOCK,XP(D)::S(A)
        • P(h);OGATE,XS(I)::QAR2(J),XP(h)
        • S(f);OGATE::R(E)+P(G),XS(f)
        • S(f);N_GUARD::R(E)+P(G)
        • P(g);N_GUARD::S(I)
      • Refutation
        • B(a);
    • Try
      • Q(J);XS(f)
      • Vars
        • B(a);OGATE,XP(D)::R1(E),XB(a)
        • P(h);OGATE,XS(I)::QAR2(J),XP(h)
        • B(a);N_GUARD::S(A),XB(a)
        • P(g);N_GUARD::S(I)
      • Refutation
        • P(i);XQ(J)
  • Actual
    • Q(J);
    • Vars
      • S(f);CHECK,OGATE,XP(G)::QAR2(J),XS(f)
      • B(a);OGATE,XP(D)::R1(E),XB(a)
      • P(h);OGATE,XS(I)::QAB(J)+P(H),XP(h)
      • S(f);OGATE::QAB(J)+P(H)
      • B(a);N_GUARD::S(A),XB(a)
      • P(g);N_GUARD::S(I)
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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).