MESON Chess Problem Database

Problem Display
PID: 4764 (b1R1K3/3QPRp1/1p4Pb/1Pp1P2r/4k1p1/3N1p2/3p1pP1/3N1B2 w - - 0 1)

Blake, Percy Francis

Manchester Weekly Times, 1890

(First published on Fri Oct 10 1890)

b1R1K3/3QPRp1/1p4Pb/1Pp1P2r/4k1p1/3N1p2/3p1pP1/3N1B2

#2

12 + 11

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.S3xf2#
    • 1...Rg5
      • 2.Rf4#
    • 1...Be3
      • 2.Sc3#
    • 1...Bf4
      • 2.Rxf4#
    • 1...fxg2
      • 2.Bxg2#
    • 1...g3
      • 2.gxf3#
    • 1...c4
      • 2.Rxc4#
  • Tries
    • 1.Rxc5?
      • threat
        • 2.S3xf2#
        • 2.Rc4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Rf5
        • 2.Rc4#
      • 1...Be3
        • 2.Sc3#
      • 1...g3
        • 2.Rc4#
        • 2.gxf3#
      • 1...bxc5!
    • 1.Qxg4+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Rd8#
      • 1...Bf4!
  • Keys
    • 1.Rd8!
      • 1...Rxe5
        • 2.S3xf2#
      • 1...fxg2
        • 2.Bxg2#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Rh1
        • 2.Qf5#
      • 1...Rh2
        • 2.Qf5#
      • 1...Rh3
        • 2.Qf5#
      • 1...Rh4
        • 2.Qf5#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rg5
        • 2.Rf4#
      • 1...Be3
        • 2.Sc3#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Bg5
        • 2.Qf5#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Bb7
        • 2.Qxb7#
      • 1...g3
        • 2.gxf3#
      • 1...c4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(g);P_PINP(I),SBLOCK,XP(F)::S(D),XP(b)
    • R(g);S_CUTB(i)::R1(J)
    • B(i);SBLOCK::S(A)
    • B(i);N_GUARD::R1(J),XB(i)
    • P(c);OGATE,XP(C)::B(B),XP(c)
    • P(e);N_GUARD::P(C),XP(c)
    • P(f);OGATE::R(K),XP(f)
  • Tries
    • Try
      • R(K);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(k);N_GUARD::QAB1(H),XB(k)
        • R(g);::R(K)
        • B(i);SBLOCK::S(A)
      • Refutation
        • P(h);XR(K)
    • Try
      • Q(H);CHECK,XP(e)
      • Refutation
        • B(i);P_SPINB(i)
  • Actual
    • R(K);
    • Vars
      • R(g);P_PINP(I),SBLOCK,XP(F)::S(D),XP(b)
      • P(c);OGATE,XP(C)::B(B),XP(c)
      • B(k);N_GUARD::QAB1(H),XB(k)
      • R(g);N_GUARD::QAB1(H)
      • R(g);N_GUARD::QAB1(H),XR(g)
      • R(g);S_CUTB(i)::R1(J)
      • B(i);SBLOCK::S(A)
      • B(i);N_GUARD::R1(J),XB(i)
      • B(i);S_CUTR(g)::QAB1(H)
      • B(k);N_GUARD,P_PINQ(H)::QAB(H),XB(k)
      • B(k);N_GUARD::QAB(H),XB(k)
      • P(e);N_GUARD::P(C),XP(c)
      • P(f);N_GUARD::QAR1(H)
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).