MESON Chess Problem Database

Problem Display
PID: 11212 (B1b5/bnQp3p/3R3K/1Pp1k2p/1Rn1PN1r/8/3N4/1qB5 w - - 0 1)

Robinson, H

Chess, 1937

B1b5/bnQp3p/3R3K/1Pp1k2p/1Rn1PN1r/8/3N4/1qB5

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sd3#
    • 1...Qd3
      • 2.Sxd3#
    • 1...Qa1
      • 2.Sd3#
    • 1...Qxc1
      • 2.Sd3#
    • 1...Qb2
      • 2.Sd3#
    • 1...Qxb4
      • 2.Sd3#
    • 1...Sb2
      • 2.Sf3#
      • 2.Re6#
    • 1...Sxd2
      • 2.Re6#
    • 1...Sa3
      • 2.Sf3#
      • 2.Re6#
    • 1...Se3
      • 2.Re6#
    • 1...Sca5
      • 2.Sf3#
      • 2.Re6#
    • 1...Sb6
      • 2.Sf3#
      • 2.Re6#
    • 1...Sba5
      • 2.Sf3#
    • 1...Sd8
      • 2.Sf3#
      • 2.Sxc4#
  • Tries
    • 1.Bb2+?
      • 1...Qxb2
        • 2.Sd3#
      • 1...Sxb2
        • 2.Re6#
      • 1...Kxf4!
    • 1.Qxc5+?
      • 1...Kxf4
        • 2.Qg5#
      • 1...Sxc5
        • 2.Sxc4#
      • 1...Bxc5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qf6#
      • 1...Kxf4
        • 2.Qg5#
      • 1...Kxd6
        • 2.Sxc4#
      • 1...Rxf4
        • 2.Qe7#
      • 1...Scxd6
        • 2.Sf3#
      • 1...Sbxd6
        • 2.Sf3#
      • 1...Sxd8
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::S(E)
    • Q(a);N_GUARD::S(E),XQ(a)
    • Q(a);N_GUARD,XB(A)::S(E)
    • Q(a);N_GUARD,XR(C)::S(E)
    • S(b);XS(B)::QAB(I)+R(G),DCHECK
    • S(b);::QAB(I)+R(G),DCHECK
    • S(h);::S(B)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • Q(a);XB(A)::S(E)
        • S(b);XB(A)::QAB(I)+R(G),DCHECK
      • Refutation
        • K(e);S_FLIGHT,XS(E)
    • Try
      • Q(I);CHECK,XP(d)
      • Vars
        • K(e);OGATE,S_FLIGHT,XS(E)::QAB1(I)
        • S(h);XQ(I)::S(B),XS(b)
      • Refutation
        • B(g);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • K(e);S_FLIGHT,XS(E)::QAB1(I)
      • K(e);P_SPINP(i),S_FLIGHT,XR(G)::S(B),XS(b)
      • R(c);SBLOCK,XS(E)::QAR2(I)
      • S(b);SBLOCK,XR(G)::S(B)
      • S(h);SBLOCK,XR(G)::S(B)
      • S(h);XQ(I)::S(B),XS(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).