MESON Chess Problem Database

Problem Display
PID: 102058 (6q1/3Bp3/3pRP1b/1p1k3N/2p5/3p1P2/Q5p1/K5B1 w - - 0 1)

Rowland, Thomas B

Toxteth Observer, 1883

6q1/3Bp3/3pRP1b/1p1k3N/2p5/3p1P2/Q5p1/K5B1

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Qa8#
    • 1...Qh7
      • 2.Qa8#
    • 1...Qg3
      • 2.Qa8#
    • 1...Qg4
      • 2.Qa8#
    • 1...Qg5
      • 2.Qa8#
    • 1...Qg6
      • 2.Qa8#
    • 1...Qg7
      • 2.Qa8#
    • 1...Qa8
      • 2.Qxa8#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Bg7
      • 2.Sf4#
    • 1...Bf8
      • 2.Sf4#
      • 2.Qa8#
    • 1...b4
      • 2.Qa5#
    • 1...exf6
      • 2.Sxf6#
  • Tries
    • 1.Qa7?
      • threat
        • 2.Qd4#
        • 2.Qb7#
      • 1...Qxe6
        • 2.Qd4#
      • 1...c3
        • 2.Qd4#
        • 2.Qa2#
      • 1...Qb8
        • 2.Qd4#
      • 1...Qg4
        • 2.Qb7#
        • 2.Qa8#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qc8
        • 2.Qd4#
      • 1...Be3!
  • Keys
    • 1.f4!
      • 1...Qxe6
        • 2.Qa8#
      • 1...Bxf4
        • 2.Sxf4#
      • 1...exf6
        • 2.Sxf6#
      • 1...Qb8
        • 2.Qxg2#
      • 1...Qf7
        • 2.Qxg2#
        • 2.Qa8#
      • 1...Qh7
        • 2.Qa8#
      • 1...Qg3
        • 2.Qa8#
      • 1...Qg4
        • 2.Qa8#
      • 1...Qg5
        • 2.Qa8#
      • 1...Qg6
        • 2.Qa8#
      • 1...Qg7
        • 2.Qa8#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qc8
        • 2.Qxg2#
      • 1...Qd8
        • 2.Qxg2#
      • 1...Qe8
        • 2.Qxg2#
      • 1...Qf8
        • 2.Qxg2#
      • 1...Qh8
        • 2.Qxg2#
      • 1...Bg5
        • 2.Qxg2#
      • 1...Bg7
        • 2.Qxg2#
      • 1...Bf8
        • 2.Qa8#
      • 1...d2
        • 2.Qxd2#
      • 1...b4
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • Q(i);N_GUARD::QAB(C)
    • Q(i);N_GUARD,P_PINP(G)::QAB(C)
    • Q(i);N_GUARD,P_PINQ(C)::QAB(C),XQ(i)
    • B(g);N_GUARD::S(E),XB(g)
    • B(g);N_GUARD,P_PINP(G)::S(E)
    • P(d);OGATEB::QAR(C)
    • P(h);XP(G)::S(E),XP(h)
  • Tries
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);XR(F)::QAR1(C)
        • Q(i);::QAR1(C)
        • Q(i);N_GUARD,P_PINQ(C)::QAB(C),XQ(i)
      • Refutation
        • B(g);
  • Actual
    • P(D);
    • Vars
      • Q(i);N_GUARD,XR(F)::QAB(C)
      • B(g);XP(D)::S(E),XB(g)
      • P(h);XP(G)::S(E),XP(h)
      • Q(i);N_GUARD::QAB(C),XP(a)
      • Q(i);N_GUARD::QAB(C)
      • Q(i);N_GUARD,P_PINP(G)::QAB(C)
      • Q(i);N_GUARD,P_PINQ(C)::QAB(C),XQ(i)
      • Q(i);N_GUARD,P_PINP(G)::QAB(C),XP(a)
      • B(g);S_CUTQ(i)::QAB(C),XP(a)
      • B(g);P_PINP(G),S_CUTQ(i)::QAB(C),XP(a)
      • B(g);S_CUTQ(i)::QAB(C)
      • P(b);OGATEB::QAR(C),XP(b)
      • P(d);OGATEB::QAR(C)
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).