MESON Chess Problem Database

Problem Display
PID: 75554 (1R4r1/2b3p1/5N2/5p2/P1kP1r2/1qp5/N3P1PP/4Q1BK w - - 0 1)

Lennon, Jean

Il Due Mosse, 1962

1R4r1/2b3p1/5N2/5p2/P1kP1r2/1qp5/N3P1PP/4Q1BK

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Rb4#
      • 2.Qxc3#
    • 1...Qc2
      • 2.Rb4#
    • 1...Qxa4
      • 2.Qxc3#
    • 1...Qb1
      • 2.Qxc3#
    • 1...Qb4
      • 2.Rxb4#
    • 1...Qb5
      • 2.Qxc3#
    • 1...Qb6
      • 2.Qxc3#
    • 1...Qb7
      • 2.Qxc3#
    • 1...Qxb8
      • 2.Qxc3#
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qd3#
      • 1...Qxb8
        • 2.Qxc3#
      • 1...Rxd4
        • 2.Qxc7#
      • 1...gxf6
        • 2.Qxg8#
      • 1...Qb4
        • 2.Rxb4#
      • 1...Qb5
        • 2.Qxc3#
      • 1...Qb6
        • 2.Qxc3#
      • 1...Qb7
        • 2.Qxc3#
      • 1...Qd1
        • 2.Rb4#
        • 2.Qxc3#
      • 1...Qc2
        • 2.Rb4#
      • 1...Qb1
        • 2.Qxc3#
      • 1...Rf3
        • 2.Qxc7#
      • 1...c2
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD::R1(K)
    • Q(a);N_GUARD,XP(H)::QAR1(A),XP(b)
    • Q(a);N_GUARD::QAR1(A),XP(b)
    • Q(a);N_GUARD::R1(K),XQ(a)
    • Q(a);N_GUARD,P_PINP(F)::QAR1(A),XP(b)
    • Q(a);N_GUARD,XR(K)::QAR1(A),XP(b)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(a);N_GUARD,XR(K)::QAR1(A),XP(b)
      • R(d);OGATE,XP(I)::QAR(A),XB(f)
      • P(g);OGATE,XS(J)::QAB(A),XR(h)
      • Q(a);N_GUARD::R1(K),XQ(a)
      • Q(a);N_GUARD::QAR1(A),XP(b)
      • Q(a);N_GUARD,P_PINP(F)::QAR1(A),XP(b)
      • Q(a);N_GUARD::R1(K)
      • Q(a);N_GUARD,P_PINB(B)::QAR1(A),XP(b)
      • R(d);OGATE::QAR(A),XB(f)
      • P(b);OGATE::QAB1(A),XQ(a)
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).