MESON Chess Problem Database

Problem Display
PID: 16622 (2Q5/b2n4/5N2/p2r4/3N3R/r2k4/8/1bBK4 w - - 0 1)

Wurzburg, Otto

American Chess Bulletin, 1942

2Q5/b2n4/5N2/p2r4/3N3R/r2k4/8/1bBK4

#2

6 + 7

5088 How to Solve Chess Problems 1945

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Rh3#
    • 1...Ba2
      • 2.Qc2#
    • 1...Bc2+
      • 2.Qxc2#
  • Tries
    • 1.Qa6+?
      • 1...Kc3
        • 2.Sxd5#
      • 1...Rb5!
  • Keys
    • 1.Se2!
      • threat
        • 2.Qc4#
      • 1...Bc2+
        • 2.Qxc2#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Ra4
        • 2.Qc3#
      • 1...Rd4
        • 2.Rh3#
      • 1...Rc5
        • 2.Rd4#
      • 1...Ba2
        • 2.Qc2#
      • 1...Bd4
        • 2.Sf4#
      • 1...Bc5
        • 2.Qa6#
      • 1...Sc5
        • 2.Qh3#
      • 1...Se5
        • 2.Qf5#
      • 1...Sb6
        • 2.Rh3#
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK,XS(C)::R(D)
    • B(a);N_GUARD::QAB1(F)
    • B(a);CHECK,N_GUARD::QAB1(F),XB(a)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);P-FLIGHT,P_PINS(C)::S(E),XR(e)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(C);
    • Threat
      • QAB1(F)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(F),XB(a)
      • R(b);N_GUARD::QAR1(F),XR(b)
      • R(b);N_GUARD::QAR1(F)
      • R(e);S_CUTB(f)::R(D)
      • R(e);N_GUARD,S_CUTB(f)::R1(D)
      • B(a);N_GUARD::QAB1(F)
      • B(f);SBLOCK::S(C)
      • B(f);S_CUTR(e)::QAB(F)
      • S(g);OGATE::QAR(F)
      • S(g);OGATE::QAB(F)
HTML5 logo

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).