MESON Chess Problem Database

Problem Display
PID: 5990 (8/1p6/1K6/8/k7/bR6/Q7/1n6 w - - 0 1)

Neukomm, Gyula (Julius) R

Chemnitzer Wochenschach (Allgemeine Zeitung Chemnitz), 1926

8/1p6/1K6/8/k7/bR6/Q7/1n6

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxa3#
    • 1...Sc3
      • 2.Qxa3#
  • Tries
    • 1.Kxb7?
      • 1...Sd2
        • 2.Qxa3#
      • 1...Sc3
        • 2.Qxa3#
      • 1...Ka5!
    • 1.Rxa3+?
      • 1...Kb4
        • 2.Qb3#
      • 1...Sxa3!
    • 1.Rc3?
      • threat
        • 2.Rc4#
        • 2.Qb3#
      • 1...Kb4
        • 2.Rc4#
        • 2.Qb3#
        • 2.Qc4#
      • 1...Sd2
        • 2.Qxa3#
      • 1...Sxc3!
    • 1.Re3?
      • threat
        • 2.Re4#
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...Sd2
        • 2.Qxa3#
      • 1...Sc3!
    • 1.Rf3?
      • threat
        • 2.Rf4#
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...Sd2
        • 2.Qxa3#
      • 1...Sc3!
    • 1.Rg3?
      • threat
        • 2.Rg4#
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...Sd2
        • 2.Qxa3#
      • 1...Sc3!
    • 1.Rh3?
      • threat
        • 2.Rh4#
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...Sd2
        • 2.Qxa3#
      • 1...Sc3!
    • 1.Qa1?
      • 1...Sc3
        • 2.Qxa3#
      • 1...Sd2
        • 2.Qxa3#
      • 1...Kxb3!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Rd4#
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...Sd2
        • 2.Qxa3#
      • 1...Sc3
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(A),XB(b)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(d)
      • Vars
        • S(a);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(B);CHECK,XB(b)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);P_SPINS(a),XR(B)
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • S(a);XR(B)
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • K(c);N_SPINB(b),S_FLIGHT,XR(B)
  • Actual
    • R(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);N_SPINB(b),P-FLIGHT::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XB(b)
      • S(a);::R(B)
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).