MESON Chess Problem Database

Problem Display
PID: 268543 (2Q5/B3R3/2PpNp2/2p5/4kPB1/r2p2K1/b2P4/3N4 w - - 0 1)

Allen, Frederick B

Sunday Referee, 1929

(First published on Sun Oct 27 1929)

2Q5/B3R3/2PpNp2/2p5/4kPB1/r2p2K1/b2P4/3N4

#2

10 + 7

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Sxc3#
    • 1...Ra4
      • 2.Sc3#
    • 1...Ra5
      • 2.Sc3#
    • 1...Ra6
      • 2.Sc3#
    • 1...Rxa7
      • 2.Sc3#
    • 1...Bb3
      • 2.Sc3#
    • 1...Bd5
      • 2.Sf2#
    • 1...c4
      • 2.Sc7#
    • 1...d5
      • 2.Sf2#
    • 1...f5
      • 2.Bf3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Bf3#
        • 2.Bf5#
      • 1...f5
        • 2.Bf3#
        • 2.Bxf5#
      • 1...Bxe6!
    • 1.Bf5+?
      • 1...Kd5
        • 2.Se3#
      • 1...Kxf5!
  • Keys
    • 1.Qa6!
      • 1...Kd5
        • 2.Bf3#
      • 1...Rxa6
        • 2.Sc3#
      • 1...Bxe6
        • 2.Qc4#
      • 1...Rb3
        • 2.Qc4#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Ra4
        • 2.Sc3#
      • 1...Ra5
        • 2.Sc3#
      • 1...Bb1
        • 2.Qc4#
      • 1...Bb3
        • 2.Sc3#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bd5
        • 2.Sf2#
      • 1...c4
        • 2.Sc7#
      • 1...d5
        • 2.Sf2#
      • 1...f5
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::S(A),XR(b)
    • R(b);N_GUARD::S(A)
    • R(b);N_GUARD,XB(H)::S(A)
    • B(a);S_CUTR(b)::S(A)
    • B(a);SBLOCK::S(A)
    • P(e);S_CUTB(a)::R(I)+S(G)
    • P(f);SBLOCK::S(A)
    • P(g);SBLOCK::B(E)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);P_SPINB(a),XS(G)
    • Try
      • B(E);CHECK
      • Vars
        • K(d);S_FLIGHT::S(A)
      • Refutation
        • K(d);S_FLIGHT,XB(E)
  • Actual
    • Q(J);
    • Vars
      • K(d);N_GUARD,S_FLIGHT::B(E)
      • R(b);N_GUARD,XQ(J)::S(A)
      • B(a);N_GUARD,P_SPINB(a),XS(G)::QAR2(J)
      • R(b);S_CUTB(a)::QAR2(J)
      • R(b);N_GUARD::S(A),XR(b)
      • R(b);N_GUARD::S(A)
      • B(a);N_GUARD::QAR2(J)
      • B(a);S_CUTR(b)::S(A)
      • B(a);N_GUARD::QAR2(J),XB(a)
      • B(a);SBLOCK::S(A)
      • P(e);S_CUTB(a)::R(I)+S(G)
      • P(f);SBLOCK::S(A)
      • P(g);SBLOCK::B(E)
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).