MESON Chess Problem Database

Problem Display
PID: 11036 (1Q4N1/4p2r/1P1RP2q/1KP1k3/n6p/1pbBB2b/1r6/4R3 w - - 0 1)

Dobbs, Gilbert S

Chess, 1936

1Q4N1/4p2r/1P1RP2q/1KP1k3/n6p/1pbBB2b/1r6/4R3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Bd4#
    • 1...Qg7
      • 2.Bd2#
    • 1...Qf8
      • 2.Bd2#
    • 1...Qxe6
      • 2.Bd2#
    • 1...Qf6
      • 2.Bd2#
    • 1...Bxe6
      • 2.Rd4#
      • 2.Rd7#
      • 2.Rd8#
    • 1...exd6
      • 2.Qxd6#
  • Tries
    • 1.Bg5+?
      • 1...Re2
        • 2.Rxe2#
      • 1...Bxe1!
    • 1.Bxh6+?
      • 1...Re2
        • 2.Rxe2#
      • 1...Bxe1!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Rc6#
      • 1...Qf4+
        • 2.Bd4#
      • 1...Qxe6+
        • 2.Rd5#
      • 1...Bxe6+
        • 2.Rd5#
      • 1...Sxb6+
        • 2.Rxb6#
      • 1...exd6
        • 2.Qxd6#
      • 1...Qf8
        • 2.Bd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(h);SBLOCK::R(A)+B(C),DCHECK
    • Q(h);N_GUARD::R(A)+B(C)
    • Q(h);N_GUARD,XP(H)::R(A)+B(C)
    • P(i);OGATE,P_SPINP(i),XR(G)::QAB1(I),XP(i)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R(A),XR(a)
      • Refutation
        • B(c);XR(A)
    • Try
      • B(C);CHECK,XQ(h)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R(A),XR(a)
      • Refutation
        • B(c);XR(A)
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • QAB(I)+R(G)
    • Vars
      • Q(h);CHECK,SBLOCK::R(A)+B(C),DCHECK
      • Q(h);CHECK,SBLOCK,XP(H)::QAB(I)+R(G),DCHECK
      • B(d);CHECK,SBLOCK,XP(H)::QAB(I)+R(G),DCHECK
      • S(e);CHECK,OGATE,XP(F)::QAB(I)+R(G),XS(e)
      • P(i);OGATE,P_SPINP(i),XR(G)::QAB1(I),XP(i)
      • Q(h);N_GUARD::R(A)+B(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).