MESON Chess Problem Database

Problem Display
PID: 144382 (4r1nR/4p2P/4p3/b7/5Pkp/7b/K1B1P1r1/nQB2NRq w - - 0 1)

Neumann, Itzhak

Magyar Sakkvilag, 1931

4r1nR/4p2P/4p3/b7/5Pkp/7b/K1B1P1r1/nQB2NRq

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kh5
      • 2.hxg8Q#
      • 2.hxg8R#
  • Tries
    • 1.Bf5+?
      • 1...Kh5
        • 2.hxg8Q#
        • 2.hxg8S#
        • 2.hxg8B#
        • 2.hxg8R#
      • 1...exf5!
    • 1.Rxg8+?
      • 1...Kh5
        • 2.h8Q#
        • 2.h8R#
      • 1...Rxg8!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Qg6#
      • 1...Kh5
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...Bd2
        • 2.e3#
      • 1...Sc2
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINR(c),S_FLIGHT::PXS(k)=Q
  • Tries
    • Try
      • B(F);CHECK,P_SPINP(G)
      • Refutation
        • P(h);XB(F)
    • Try
      • R(J);CHECK,XS(k)
      • Vars
        • K(e);N_SPINR(c),S_FLIGHT::P=Q
      • Refutation
        • R(j);XR(J)
  • Actual
    • B(F);P_SPINP(G)
    • Threat
      • QAR2(A)
    • Vars
      • K(e);N_SPINR(c),S_FLIGHT::PXS(k)=Q
      • B(g);N_PINP(G)::B(F)+P(G)
      • S(a);N_PINP(G)::B(F)+P(G)
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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).