MESON Chess Problem Database

Problem Display
PID: 132338 (6r1/6b1/6B1/8/Q1p3K1/B7/1R2P3/2k1n3 w - - 0 1)

Janet, Frank

British Chess Magazine, 1918

6r1/6b1/6B1/8/Q1p3K1/B7/1R2P3/2k1n3

#2

6 + 5

14475 Mat Plus Review 2007
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bh6
      • 2.Ra2#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sg2
      • 2.Qc2#
    • 1...Sd3
      • 2.Qc2#
    • 1...Sf3
      • 2.Qc2#
    • 1...c3
      • 2.Ra2#
  • Tries
    • 1.Bb4?
      • threat
        • 2.Rb1#
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Ra8
        • 2.Rb1#
      • 1...Bc3
        • 2.Qa1#
      • 1...Sd3
        • 2.Qc2#
        • 2.Qa1#
      • 1...c3
        • 2.Qa1#
      • 1...Bxb2!
    • 1.Bc5?
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Bxb2
        • 2.Be3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Ra8!
    • 1.Bd6?
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Bxb2
        • 2.Bf4#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Ra8!
    • 1.Be7?
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Bxb2
        • 2.Bg5#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Ra8!
    • 1.Rd2+?
      • 1...Bb2
        • 2.Rd1#
        • 2.Qd1#
      • 1...Kxd2!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Bxb2
        • 2.Bh6#
      • 1...Sc2
        • 2.Qxc2#

This anticipates 106513(1951)

This is after 2845

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(d);N_GUARD,P_PINB(F)::B(C)+R(A)
    • S(b);N_GUARD::QAR1(D),XS(b)
    • S(b);N_GUARD::QAR1(D)
    • P(c);S_CUTB(d)::B(C)+R(A)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(D)
        • S(b);N_GUARD::QAR1(D),XS(b)
        • R(e);::R1(A)
        • B(d);P_PINB(F)::QAR2(D)
        • P(c);::QAR2(D)
      • Refutation
        • B(d);P_PINB(F),XR(A)
    • Try
      • B(C);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(D)
        • B(d);P_PINB(F),SBLOCK,XR(A)::B(C)
        • S(b);N_GUARD::QAR1(D),XS(b)
      • Refutation
        • R(e);
    • Try
      • B(C);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(D)
        • B(d);P_PINB(F),SBLOCK,XR(A)::B(C)
        • S(b);N_GUARD::QAR1(D),XS(b)
      • Refutation
        • R(e);
    • Try
      • B(C);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(D)
        • B(d);P_PINB(F),SBLOCK,XR(A)::B(C)
        • S(b);N_GUARD::QAR1(D),XS(b)
      • Refutation
        • R(e);
    • Try
      • R(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(A)
  • Actual
    • B(C);
    • Threat
      • QAR2(D)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(D)
      • B(d);OGATE,P_PINB(F),SBLOCK,XR(A)::B(C)
      • S(b);N_GUARD::QAR1(D),XS(b)
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).