MESON Chess Problem Database

Problem Display
PID: 257232 (K7/4n3/3p3B/1Q3n1R/3k4/2p3P1/3p4/1N1R3B w - - 0 1)

Segers, Marcel

Wiener Schachzeitung, 1931

(First published on Thu Mar 5 1931)

K7/4n3/3p3B/1Q3n1R/3k4/2p3P1/3p4/1N1R3B

#2

8 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Bg7#
    • 1...Sh4
      • 2.Rxh4#
    • 1...Sg7
      • 2.Rh4#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sc6
      • 2.Qd5#
    • 1...Sg6
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
    • 1...c2
      • 2.Rxd2#
  • Tries
    • 1.Rxf5?
      • 1...Sxf5
        • 2.Qd5#
      • 1...Sd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Sc6
        • 2.Rd5#
        • 2.Qd5#
      • 1...Sg6
        • 2.Rd5#
        • 2.Qd5#
      • 1...Sc8
        • 2.Rd5#
        • 2.Qd5#
      • 1...Sg8
        • 2.Rd5#
        • 2.Qd5#
      • 1...c2
        • 2.Rxd2#
      • 1...d5!
    • 1.Qa4+?
      • 1...Kd3
        • 2.Qe4#
      • 1...Kc5
        • 2.Be3#
      • 1...Ke5!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Bg7#
      • 1...Kxc4!
    • 1.Qb4+?
      • 1...Kd3
        • 2.Qe4#
      • 1...Ke5!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxc3#
      • 1...Kd3
        • 2.Rxd2#
      • 1...Kc5
        • 2.Be3#
      • 1...Ke5
        • 2.Bg7#
      • 1...Sd5
        • 2.Qxd5#
      • 1...c2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(d);N_GUARD,SBLOCK::B(G)
    • S(d);N_GUARD::R(F),XS(d)
    • S(d);N_GUARD::R(F)
    • S(f);N_GUARD::QAR1(E),XS(f)
    • S(f);N_GUARD::QAR1(E)
    • P(b);N_GUARD::R(B),XP(a)
  • Tries
    • Try
      • R(F);XS(d)
      • Vars
        • S(f);N_GUARD,XR(F)::QAR1(E)
        • P(b);N_GUARD::R(B),XP(a)
      • Refutation
        • P(e);
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(E)
        • K(c);N_GUARD,N_SPINP(a),P_SPINS(d),S_FLIGHT::B(G)
      • Refutation
        • K(c);N_SPINP(a),P_SPINS(d),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINP(a),P_SPINS(d),S_FLIGHT::B(G)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(E)
      • Refutation
        • K(c);N_SPINP(a),P_SPINS(d),S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E),XP(b)
    • Vars
      • K(c);N_GUARD,P-FLIGHT,S_CUTP(b)::R1(B),XP(a)
      • K(c);N_GUARD,N_SPINP(a),P_SPINS(d),S_FLIGHT::B(G)
      • S(f);N_GUARD::QAR1(E),XS(f)
      • P(b);::QAB1(E)
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).