MESON Chess Problem Database

Problem Display
PID: 204498 (2N5/2p4q/p3P1p1/2kBR2r/p1PN1p1b/1R5b/3KPQr1/4B3 w - - 0 1)

Nemo, Ottmar (Weiss, Ottmar)

Magyar Sakkvilag, 1925

2N5/2p4q/p3P1p1/2kBR2r/p1PN1p1b/1R5b/3KPQr1/4B3

#2

11 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Sf3#
    • 1...Bxe6
      • 2.Sxe6#
    • 1...a5
      • 2.Rb5#
  • Tries
    • 1.Be4+?
      • 1...Kxc4
        • 2.Bd3#
      • 1...Rxe5!
    • 1.Bb7+?
      • 1...Kxc4
        • 2.Bxa6#
      • 1...Rxe5!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Bb4#
      • 1...Rg3+
        • 2.Sf3#
      • 1...Bf5+
        • 2.Be4#
      • 1...g5+
        • 2.Be4#
      • 1...axb3
        • 2.Sxb3#
      • 1...a5
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,S_CUTB(e)::QAB(D)+S(G)
    • B(b);XP(J)::QAB(D)+S(G),DCHECK,XB(b)
    • P(h);N_GUARD::R1(E)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(f);P-FLIGHT,XP(F)::B(H)
      • Refutation
        • R(g);XR(I)
    • Try
      • B(H);CHECK
      • Vars
        • K(f);P-FLIGHT,XP(F)::B(H),XP(h)
      • Refutation
        • R(g);XR(I)
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • B(A)
    • Vars
      • R(a);CHECK,N_GUARD,S_CUTB(e)::QAB(D)+S(G)
      • B(b);CHECK,S_CUTR(g)::R(I)+B(H)
      • P(i);CHECK,S_CUTR(g)::R(I)+B(H)
      • P(c);XR(E)::QAB(D)+S(G),DCHECK,XP(c)
      • P(h);N_GUARD::R1(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).