MESON Chess Problem Database

Problem Display
PID: 66796 (4RK2/2p3B1/3p3p/1P1k1Np1/N3n2r/2pP1qrQ/b2p1n2/1R5B w - - 0 1)

Neumann, Itzhak

3rd Prize, Xadrez Brasileiro TT, 1934

4RK2/2p3B1/3p3p/1P1k1Np1/N3n2r/2pP1qrQ/b2p1n2/1R5B

#2

10 + 13

5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Se7#
    • 1...Qxh1
      • 2.Se7#
    • 1...Qe2
      • 2.Se7#
    • 1...Qg2
      • 2.Se7#
    • 1...Qh5
      • 2.Se7#
    • 1...Qe3
      • 2.Se7#
    • 1...Qxf5+
      • 2.Qxf5#
    • 1...Sc5
      • 2.Sxc3#
    • 1...c5
      • 2.Sb6#
  • Tries
    • 1.Sxc3+?
      • 1...Kc5
        • 2.Bd4#
      • 1...Sxc3!
    • 1.Sb6+?
      • 1...Kc5
        • 2.Bd4#
      • 1...cxb6!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Rd4#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Qxd3
        • 2.Se7#
      • 1...Qe3
        • 2.Se7#
      • 1...Bc4
        • 2.dxc4#
      • 1...Sc5
        • 2.Sxc3#
      • 1...Sf6
        • 2.Se3#
      • 1...c5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_PINS(G),P_SPINS(g)::S(G)
    • Q(e);N_PINS(G),XB(B)::S(G)
    • Q(e);N_PINS(G)::S(G)
    • Q(e);CHECK,OGATE,P_SPINS(g),XS(G)::QAR2(D),XQ(e)
    • S(g);N_GUARD,P_SPINQ(e),SBLOCK::S(E),XP(d)
    • P(m);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • S(E);CHECK,XP(d)
      • Vars
        • K(i);P-FLIGHT::B(H)
      • Refutation
        • S(g);P_SPINQ(e),XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(i);P-FLIGHT::B(H)
      • Refutation
        • P(m);XS(E)
  • Actual
    • R(A);
    • Threat
      • R1(A)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINS(g),XS(G)::QAR2(D),XQ(e)
      • Q(e);N_PINS(G),P_SPINS(g),XP(C)::S(G)
      • Q(e);N_PINS(G),P_SPINS(g)::S(G)
      • B(a);OGATE::P(C),XB(a)
      • S(g);N_GUARD,P_SPINQ(e),SBLOCK::S(E),XP(d)
      • S(g);N_PINS(G),P_SPINQ(e)::S(G)
      • P(m);N_GUARD,SBLOCK::S(E)
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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).