MESON Chess Problem Database

Problem Display
PID: 117791 (bBB3n1/6R1/1K2P3/R1P1rk1p/4p3/3Pp3/Q2N4/3n4 w - - 0 1)

Neumann, Itzhak

Norsk Sjakkblad, 1936

bBB3n1/6R1/1K2P3/R1P1rk1p/4p3/3Pp3/Q2N4/3n4

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6+
      • 2.Qxe6#
  • Tries
    • 1.e7+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Re6+
        • 2.Qxe6#
      • 1...Kf4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxe5#
      • 1...Rxe6+
        • 2.c6#
      • 1...Kf4
        • 2.Qxe5#
      • 1...Kf6
        • 2.Qxe5#
      • 1...Rxc5
        • 2.e7#
      • 1...Rd5
        • 2.dxe4#
      • 1...Sb2
        • 2.Qf1#
      • 1...Sc3
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(d);CHECK,OGATE,P_SPINR(d),XP(G)::QAB1(A),XR(d)
  • Tries
    • Try
      • P(G);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(A)
        • R(d);CHECK,N_GUARD,P_SPINR(d)::QAB1(A),XR(d)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(d)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XR(d)
    • Vars
      • R(d);CHECK,P_SPINR(d),XP(G)::R(D)+P(E)
      • K(e);P-FLIGHT,P_SPINR(d)::QAB1(A),XR(d)
      • R(d);N_GUARD,P_SPINR(d),XP(E)::B(J)+P(G)
      • R(d);N_GUARD,S_CUTB(g)::P(C),XP(c)
      • S(a);OGATE::QAR(A)
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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).