MESON Chess Problem Database

Problem Display
PID: 6941 (rb1Q4/3N4/1p6/q1p2NP1/2R1rk1p/5p1B/n2R3P/1bBn2K1 w - - 0 1)

Andrade, Barry Jack da Costa

Chess, 1935

rb1Q4/3N4/1p6/q1p2NP1/2R1rk1p/5p1B/n2R3P/1bBn2K1

#2

10 + 12

98 Manchester Guardian 1950

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Rd4#
    • 1...Rd4
      • 2.Rdxd4#
    • 1...Sdc3
      • 2.Rxa2#
    • 1...Sac3
      • 2.Rxd1#
    • 1...Sb4
      • 2.Rxd1#
    • 1...f2+
      • 2.Rxf2#
  • Tries
    • 1.Rxd1+?
      • 1...Qd2
        • 2.Bxd2#
      • 1...Sxc1!
    • 1.Rxa2+?
      • 1...Se3
        • 2.Bxe3#
      • 1...Qd2!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sd5#
      • 1...f2+
        • 2.Rxf2#
      • 1...Ke3
        • 2.Sd5#
      • 1...Kxg5
        • 2.Rd5#
      • 1...Rxc4
        • 2.Rd4#
      • 1...Rd4
        • 2.Rdxd4#
      • 1...Sdc3
        • 2.Rxa2#
      • 1...Se3
        • 2.Sg6#
      • 1...Sac3
        • 2.Rxd1#
      • 1...Sb4
        • 2.Rxd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);N_SPINR(e),XR(F)::B(A)+R(C),DCHECK
    • R(e);::B(A)+R(C),DCHECK,XR(e)
    • S(b);N_GUARD,S_CUTQ(h)::B(A)+R(C),XS(c)
    • S(c);N_GUARD,S_CUTQ(h)::B(A)+R(C),XS(b)
    • P(d);CHECK::B(A)+R(C),DCHECK,XP(d)
  • Tries
    • Try
      • R(C);CHECK,XS(b)
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::B(A),XQ(h)
      • Refutation
        • S(c);XB(A)
    • Try
      • R(C);CHECK,XS(c)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::B(A),XS(b)
      • Refutation
        • Q(h);P_SPINQ(h)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • P(d);CHECK::B(A)+R(C),DCHECK,XP(d)
      • K(f);N_SPINR(e),S_FLIGHT::S(G)
      • K(f);N_SPINR(e),S_FLIGHT,XP(H)::B(A)+R(C),DCHECK
      • R(e);N_SPINR(e),XR(F)::B(A)+R(C),DCHECK
      • R(e);::B(A)+R(C),DCHECK,XR(e)
      • S(b);N_GUARD,S_CUTQ(h)::B(A)+R(C),XS(c)
      • S(b);SBLOCK::S(G)
      • S(c);N_GUARD,S_CUTQ(h)::B(A)+R(C),XS(b)
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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).