MESON Chess Problem Database

Problem Display
PID: 36419 (q2R4/3b4/2p3p1/1p2Q3/1r1r1P2/1PpkNNbR/8/2BB1nnK w - - 0 1)

Neumann, Itzhak

Recomm., BCF 007. Ty., 1931-1932

q2R4/3b4/2p3p1/1p2Q3/1r1r1P2/1PpkNNbR/8/2BB1nnK

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Qxd4#
    • 1...Be1
      • 2.Sxe1#
    • 1...Bh2
      • 2.Se1#
    • 1...Bxf4
      • 2.Se1#
    • 1...Sxe3
      • 2.Qxe3#
    • 1...Se2
      • 2.Bc2#
  • Tries
    • 1.Sxf1?
      • threat
        • 2.Se1#
        • 2.Qe3#
      • 1...Rxb3
        • 2.Qxd4#
      • 1...Bxf4
        • 2.Se1#
      • 1...Bxh3
        • 2.Qe3#
      • 1...Sxf3
        • 2.Qe2#
        • 2.Qe3#
      • 1...Sxh3
        • 2.Qe2#
        • 2.Qe3#
      • 1...c2
        • 2.Qe3#
      • 1...Be1
        • 2.Sxe1#
        • 2.Qe3#
      • 1...Bf2
        • 2.Se1#
      • 1...c5
        • 2.Qe3#
      • 1...Re4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Se1#
      • 1...Rxb3
        • 2.Qxd4#
      • 1...Bxh3
        • 2.Sxb4#
      • 1...Sxf3
        • 2.Qe2#
      • 1...Sxh3
        • 2.Qe2#
      • 1...Re4
        • 2.Qxc3#
      • 1...Be1
        • 2.Sxe1#
      • 1...Se3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD,XP(D)::QAR1(I),XR(g)
    • B(e);N_GUARD::S(F),XB(e)
    • B(e);N_GUARD::S(F)
    • B(e);N_GUARD,XP(H)::S(F)
    • S(a);OGATE,XS(E)::QAR1(I),XS(a)
    • S(b);SBLOCK::B(B)
  • Tries
    • Try
      • S(E);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);N_GUARD,XP(D)::QAR1(I),XR(g)
        • B(e);XP(H)::R(G)+S(F),DCHECK
        • B(k);P_SPINR(g),XR(G)::QAR1(I)
        • P(c);::QAR1(I)
        • B(e);::R(G)+S(F),DCHECK
        • P(i);P_PINS(F)::QAR1(I)
      • Refutation
        • R(g);P_SPINB(k)
  • Actual
    • S(E);
    • Threat
      • S(F)
    • Vars
      • R(f);N_GUARD,XP(D)::QAR1(I),XR(g)
      • B(k);S_CUTR(g),XR(G)::S(E),XR(f)
      • S(b);N_GUARD,XS(F)::QAB1(I)
      • S(b);N_GUARD,XR(G)::QAB1(I)
      • R(g);OGATE,SBLOCK::QAR1(I),XP(c)
      • B(e);::R(G)+S(F),DCHECK,XB(e)
      • S(a);N_GUARD::QAR1(I),XS(a)
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).