MESON Chess Problem Database

Problem Display
PID: 101152 (1Q6/2ppp3/N4p2/1P4p1/r3k1N1/bBp2R2/6K1/6B1 w - - 0 1)

Nield, Joshua

Good Companions, 1919

1Q6/2ppp3/N4p2/1P4p1/r3k1N1/bBp2R2/6K1/6B1

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sc5#
    • 1...Bc1
      • 2.Sc5#
    • 1...Bb2
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...d5
      • 2.Bc2#
    • 1...e5
      • 2.Sxf6#
  • Tries
    • 1.Sxc7?
      • threat
        • 2.Bc2#
        • 2.Bd5#
      • 1...Rc4
        • 2.Bc2#
      • 1...c2
        • 2.Bxc2#
        • 2.Bd5#
      • 1...d5
        • 2.Bc2#
        • 2.Bxd5#
      • 1...e6
        • 2.Bc2#
      • 1...Rd4!
    • 1.Qb7+?
      • 1...d5
        • 2.Bc2#
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...c6!
    • 1.Qa8+?
      • 1...d5
        • 2.Bc2#
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...c6!
  • Keys
    • 1.Qxc7!
      • 1...Rxa6
        • 2.Qc4#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rd4
        • 2.Sf2#
      • 1...Ra5
        • 2.Qc4#
      • 1...Bc1
        • 2.Sc5#
      • 1...Bb2
        • 2.Sc5#
      • 1...Bb4
        • 2.Qc4#
      • 1...Bc5
        • 2.Sxc5#
      • 1...Bd6
        • 2.Qb7#
      • 1...c2
        • 2.Qxc2#
      • 1...f5
        • 2.Qe5#
      • 1...d5
        • 2.Bc2#
      • 1...d6
        • 2.Qxe7#
      • 1...e5
        • 2.Sxf6#
      • 1...e6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(c);S_CUTB(a)::S(G)
    • B(a);N_GUARD::S(G)
    • B(a);N_GUARD::S(G),XB(a)
    • P(h);SBLOCK::B(C)
    • P(i);N_GUARD,SBLOCK::S(E),XP(f)
  • Tries
    • Try
      • S(G);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::B(C)
        • P(i);::B(C)
      • Refutation
        • R(c);
    • Try
      • Q(H);CHECK
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(H);CHECK
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • Q(H);XP(g)
    • Vars
      • R(c);N_GUARD,XS(G)::QAR2(H)
      • R(c);N_GUARD::QAR2(H),XR(c)
      • R(c);S_CUTB(a)::S(G)
      • R(c);SBLOCK::S(E)
      • R(c);N_GUARD::QAR2(H)
      • B(a);N_GUARD::S(G)
      • B(a);S_CUTR(c)::QAR2(H)
      • B(a);N_GUARD::S(G),XB(a)
      • B(a);S_CUTP(h)::QAB(H)
      • P(b);OGATE::QAB(H),XP(b)
      • P(f);N_GUARD::QAR1(H)
      • P(h);SBLOCK::B(C)
      • P(h);OGATE::QAR(H),XP(i)
      • P(i);N_GUARD::S(E),XP(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).