MESON Chess Problem Database

Problem Display
PID: 227929 (2K2b2/4Np2/2ppkP2/R3Bp1N/2P2r2/2r1Q3/B7/5q2 w - - 0 1)

Lange, Hans Franz

Deutsche Schachzeitung, 1943

2K2b2/4Np2/2ppkP2/R3Bp1N/2P2r2/2r1Q3/B7/5q2

#2

9 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Sxf4#
    • 1...Qg2
      • 2.Sxf4#
    • 1...Qd3
      • 2.Sxf4#
    • 1...Qh3
      • 2.Sxf4#
    • 1...Qxc4
      • 2.Sxf4#
    • 1...Qa1
      • 2.Sxf4#
    • 1...Qb1
      • 2.Sxf4#
    • 1...Qc1
      • 2.Sxf4#
    • 1...Qd1
      • 2.Sxf4#
    • 1...Qe1
      • 2.Sxf4#
    • 1...Qg1
      • 2.Sxf4#
    • 1...Qh1
      • 2.Sxf4#
    • 1...Rc1
      • 2.Bxf4#
    • 1...Rc2
      • 2.Bxf4#
    • 1...Rcxc4
      • 2.Bxf4#
    • 1...Rf2
      • 2.Bxc3#
    • 1...Rfxc4
      • 2.Bxc3#
    • 1...Bxe7
      • 2.Sg7#
    • 1...Bg7
      • 2.Sxg7#
    • 1...dxe5
      • 2.Qxe5#
  • Tries
    • 1.c5+?
      • 1...Qc4
        • 2.Sxf4#
      • 1...Rb3
        • 2.Bxf4#
      • 1...Rcc4
        • 2.Bxf4#
      • 1...Rfc4
        • 2.Bxc3#
      • 1...d5!
  • Keys
    • 1.Sxc6!
      • threat
        • 2.Sd8#
      • 1...Qxc4
        • 2.Sxf4#
      • 1...Rcxc4
        • 2.Bxf4#
      • 1...Rfxc4
        • 2.Bxc3#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Be7
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 15
  • Sets
    • Q(a);N_GUARD::S(F),XR(c)
    • Q(a);N_GUARD,P_SPINQ(a),XP(C)::S(F),XR(c)
    • R(b);N_GUARD::QAR(B)+B(E),XR(c)
    • R(b);N_GUARD,P_SPINR(b),XP(C)::QAR(B)+B(E),XR(c)
    • R(c);N_GUARD::QAR(B)+B(E),XR(b)
    • R(c);N_GUARD,P_SPINR(c),XP(C)::QAR(B)+B(E),XR(b)
    • B(i);N_GUARD,XS(H)::S(F)
    • B(i);N_GUARD::S(F),XB(i)
    • P(f);OGATE,P_SPINP(f),XB(E)::QAR1(B),XP(f)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(F),XR(c)
        • R(b);P_SPINR(b)::QAR(B)+B(E),XR(c)
        • R(c);P_SPINR(c)::QAR(B)+B(E),XR(b)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • S(H);XP(e)
    • Threat
      • S(H)
    • Vars
      • Q(a);N_GUARD,P_PINS(H),P_SPINQ(a),XP(C)::S(F),XR(c)
      • R(b);N_GUARD,P_PINS(H),P_SPINR(b),XP(C)::QAR(B)+B(E),XR(c)
      • R(c);N_GUARD,P_PINS(H),P_SPINR(c),XP(C)::QAR(B)+B(E),XR(b)
      • P(f);OGATE,P_SPINP(f),XB(E)::QAR1(B),XP(f)
      • B(i);N_GUARD::S(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).