MESON Chess Problem Database

Problem Display
PID: 66822 (4r3/5BBb/1pR1P3/pPbkNnnR/K1pP1p1q/5P1p/8/3Q4 w - - 0 1)

Neumann, Itzhak

Magyar Sakkvilag, 1932

4r3/5BBb/1pR1P3/pPbkNnnR/K1pP1p1q/5P1p/8/3Q4

#2

11 + 12

5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.e7#
  • Tries
    • 1.e7+?
      • 1...Se6
        • 2.Bxe6#
      • 1...Sxf7!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sf6#
      • 1...Bxd4
        • 2.Sxb6#
      • 1...Sxd4
        • 2.e7#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Sxe6
        • 2.dxc5#
      • 1...Sxf7
        • 2.dxc5#
      • 1...c3
        • 2.Qb3#
      • 1...Be7
        • 2.Sxb6#
      • 1...Se4
        • 2.e7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(i);N_GUARD::B(J)+P(I)
  • Tries
    • Try
      • P(I);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::B(J),XS(i)
      • Refutation
        • S(i);XB(J)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • B(f);N_GUARD,P_SPINB(f),XP(D)::S(F),XP(j)
      • S(h);P_SPINS(h),S_CUTS(i),S_CUTS(i),XP(D)::B(J)+P(I)
      • S(i);OGATE,P_SPINS(h),XP(B)::QAB(A),XS(i)
      • S(i);P_SPINS(h),XP(I)::QAR(A)+P(D),XB(f)
      • S(i);P_SPINS(h),XB(J)::QAR(A)+P(D),XB(f)
      • P(b);OGATEB::QAB(A)
      • B(f);N_GUARD::S(F),XP(j)
      • S(i);N_GUARD,P_SPINS(h)::B(J)+P(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).