MESON Chess Problem Database

Problem Display
PID: 100897 (2n1n3/5R1B/8/1P1N4/KBk5/2Pr1p2/3PrN2/5Q2 w - - 0 1)

Dobbs, Gilbert S

Good Companions, 1919

2n1n3/5R1B/8/1P1N4/KBk5/2Pr1p2/3PrN2/5Q2

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxd3#
    • 1...Rexd2
      • 2.Se3#
    • 1...Rxf2
      • 2.Se3#
      • 2.Qxd3#
    • 1...Ree3
      • 2.Sxe3#
    • 1...Re4
      • 2.Qxd3#
    • 1...Re5
      • 2.Qxd3#
    • 1...Re6
      • 2.Qxd3#
    • 1...Re7
      • 2.Qxd3#
    • 1...Rdxd2
      • 2.Se3#
    • 1...Rde3
      • 2.Sxe3#
    • 1...Rd4
      • 2.Se3#
    • 1...Sb6+
      • 2.Sxb6#
    • 1...Scd6
      • 2.Sb6#
    • 1...Sa7
      • 2.Sb6#
    • 1...Se7
      • 2.Sb6#
  • Tries
    • 1.Rf4+?
      • 1...Re4
        • 2.Se3#
        • 2.Qxd3#
      • 1...Rd4
        • 2.Se3#
        • 2.Rxd4#
      • 1...Kxd5!
    • 1.Qxe2?
      • threat
        • 2.Se3#
        • 2.Qxd3#
      • 1...Sb6+
        • 2.Sxb6#
      • 1...Kxd5
        • 2.Qe4#
      • 1...fxe2!
  • Keys
    • 1.Bg8!
      • 1...Sb6+
        • 2.Sxb6#
      • 1...Kxd5
        • 2.Rf5#
      • 1...Rexd2
        • 2.Se3#
        • 2.Rf4#
      • 1...Rxf2
        • 2.Se3#
        • 2.Rf4#
      • 1...Rdxd2
        • 2.Se3#
      • 1...Rxc3
        • 2.Rf4#
      • 1...Rxd5
        • 2.Rf4#
      • 1...Re1
        • 2.Qxd3#
      • 1...Ree3
        • 2.Sxe3#
      • 1...Re4
        • 2.Qxd3#
      • 1...Re5
        • 2.Qxd3#
      • 1...Re6
        • 2.Qxd3#
      • 1...Re7
        • 2.Qxd3#
      • 1...Rde3
        • 2.Sxe3#
      • 1...Rd4
        • 2.Se3#
      • 1...Scd6
        • 2.Sb6#
      • 1...Sa7
        • 2.Sb6#
      • 1...Se7
        • 2.Sb6#
      • 1...Sed6
        • 2.Rc7#
      • 1...Sf6
        • 2.Rc7#
      • 1...Sc7
        • 2.Rxc7#
      • 1...Sg7
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATE,P_SPINR(b)::QAB1(A),XR(b)
    • R(a);N_GUARD,P_SPINR(b),XP(B)::S(H)
    • R(a);N_GUARD,P_SPINR(b)::S(H),XR(a)
    • R(b);N_GUARD,P_SPINR(a),XP(B)::S(H)
    • R(b);N_GUARD,P_SPINR(a)::S(H),XR(b)
    • R(b);N_GUARD,P_SPINR(a)::S(H)
    • S(e);CHECK,N_GUARD::S(H),XS(e)
    • S(e);N_GUARD::S(H)
  • Tries
    • Try
      • R(I);CHECK
      • Refutation
        • K(d);S_FLIGHT,XS(H)
    • Try
      • Q(A);P_PINR(b),XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(e);CHECK,N_GUARD::S(H),XS(e)
        • K(d);N_SPINR(b),S_FLIGHT,XS(H)::QAB1(A)
      • Refutation
        • P(c);N_SPINR(b),XQ(A)
  • Actual
    • B(J);
    • Vars
      • S(e);CHECK,N_GUARD::S(H),XS(e)
      • K(d);OGATEB,S_FLIGHT,XS(H)::B(J)+R(I),DCHECK
      • R(b);N_GUARD,P_SPINR(a),XP(B)::S(H)
      • R(b);N_GUARD,P_SPINR(a),XP(D)::R(I)
      • R(b);N_GUARD,P_SPINR(a),XS(H)::R(I)
      • R(a);OGATE,P_SPINR(b)::QAB1(A),XR(b)
      • R(a);N_GUARD,P_SPINR(b)::S(H),XR(a)
      • R(b);N_GUARD,P_SPINR(a)::S(H),XR(b)
      • R(b);N_GUARD,P_SPINR(a)::S(H)
      • S(e);N_GUARD::S(H)
      • S(f);N_GUARD::R(I)
      • S(f);N_GUARD::R(I),XS(f)
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).