MESON Chess Problem Database

Problem Display
PID: 76704 (8/1NpK4/7R/1k6/qpNP4/R7/bnQ5/8 w - - 0 1)

Monreal, Pierre

Nietvelt, Gustaaf Josephus

des Marands, Henri

1st HM., La Marseillaise, 1946

(First published on Tue Sep 17 1946)

8/1NpK4/7R/1k6/qpNP4/R7/bnQ5/8

#2

7 + 6

78 Bulletin Ouvrier des Echecs 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Ra5#
    • 1...Qa5
      • 2.Rxa5#
    • 1...Sxc4
      • 2.Qxa4#
    • 1...c5
      • 2.Rb6#
  • Tries
    • 1.Sxb2?
      • threat
        • 2.Qxa4#
        • 2.Qc5#
        • 2.Qc6#
      • 1...Qxc2
        • 2.Ra5#
      • 1...Qxa3
        • 2.Qc5#
        • 2.Qc6#
      • 1...bxa3
        • 2.Qxa4#
        • 2.Qc5#
      • 1...b3
        • 2.Qc5#
      • 1...c6
        • 2.Qxc6#
      • 1...Qb3
        • 2.Ra5#
        • 2.Qc5#
        • 2.Qc6#
      • 1...Qa5
        • 2.Rxa5#
        • 2.Qc5#
        • 2.Qc6#
      • 1...Qa6
        • 2.Qc5#
      • 1...Qa7
        • 2.Qc6#
      • 1...Qa8
        • 2.Qc5#
        • 2.Qc6#
      • 1...Bb3
        • 2.Qc5#
        • 2.Qc6#
      • 1...Bc4
        • 2.Qxa4#
        • 2.Qxc4#
      • 1...Bd5
        • 2.Qxa4#
        • 2.Qc5#
      • 1...c5
        • 2.Qxa4#
        • 2.Qxc5#
      • 1...Be6+!
    • 1.Qf5+?
      • 1...c5
        • 2.Qxc5#
      • 1...Kxc4+!
  • Keys
    • 1.Kxc7!
      • threat
        • 2.Rb6#
      • 1...Qa5+
        • 2.Rxa5#
      • 1...Qxc2
        • 2.Sd6#
      • 1...Sxc4
        • 2.Qxa4#
      • 1...Qa6
        • 2.Rh5#
      • 1...Qa7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATE::R1(B)
    • Q(c);OGATE::R1(B),XQ(c)
    • S(b);N_GUARD,SBLOCK,XS(C)::QAB1(A),XQ(c)
    • P(f);N_GUARD::R1(E)
  • Tries
    • Try
      • S(C);XS(b)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);OGATE,XQ(A)::R1(B)
        • P(d);::QAR1(A)
        • P(f);::QAB1(A),XP(f)
        • Q(c);::QAR1(A)
        • Q(c);::QAB1(A)
      • Refutation
        • B(a);CHECK
    • Try
      • Q(A);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAR1(A),XP(f)
      • Refutation
        • K(e);CHECK,S_FLIGHT,XS(C)
  • Actual
    • K(G);P-FLIGHT,XP(f)
    • Threat
      • R1(E)
    • Vars
      • Q(c);CHECK,OGATE::R1(B),XQ(c)
      • Q(c);P_PINS(C),XQ(A)::S(F)
      • S(b);N_GUARD,SBLOCK,XS(C)::QAB1(A),XQ(c)
      • Q(c);::R(E)
      • Q(c);P_PINS(F)::S(C)
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).