MESON Chess Problem Database

Problem Display
PID: 266384 (4b3/N5p1/PB4n1/K2kpQp1/2N3R1/1P6/2n5/8 w - - 0 1)

Neale, Harry R

Stevenson, Edward

Sunday Referee, 1937

(First published on Sun Jun 13 1937)

4b3/N5p1/PB4n1/K2kpQp1/2N3R1/1P6/2n5/8

#2

8 + 7

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Qf7#
    • 1...Bb5
      • 2.Qf7#
    • 1...Bc6
      • 2.Qf7#
    • 1...Bd7
      • 2.Qxd7#
    • 1...Bf7
      • 2.Qd7#
      • 2.Qxf7#
    • 1...Sa1
      • 2.Rd4#
    • 1...Se1
      • 2.Rd4#
    • 1...Sa3
      • 2.Rd4#
    • 1...Se3
      • 2.Rd4#
    • 1...Sb4
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sf4
      • 2.Qxe5#
    • 1...Sh4
      • 2.Qxe5#
    • 1...Se7
      • 2.Qxe5#
    • 1...Sf8
      • 2.Qxe5#
    • 1...Sh8
      • 2.Qxe5#
  • Tries
    • 1.Se3+?
      • 1...Sxe3
        • 2.Rd4#
      • 1...Kd6!
    • 1.Qf3+?
      • 1...e4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qf6?
      • threat
        • 2.Qd6#
      • 1...Sf4
        • 2.Qxe5#
      • 1...gxf6!
    • 1.b4?
      • 1...Sxb4
        • 2.Rd4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Ba4
        • 2.Qf7#
      • 1...Bb5
        • 2.Qf7#
      • 1...Bc6
        • 2.Qf7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qd7#
        • 2.Qxf7#
      • 1...Sa1
        • 2.Rd4#
      • 1...Se1
        • 2.Rd4#
      • 1...Sa3
        • 2.Rd4#
      • 1...Se3
        • 2.Rd4#
      • 1...Sh4
        • 2.Qxe5#
      • 1...Se7
        • 2.Qxe5#
      • 1...Sf8
        • 2.Qxe5#
      • 1...Sh8
        • 2.Qxe5#
      • 1...Sf4!
  • Keys
    • 1.Sc6!
      • 1...Kxc6
        • 2.Qe6#
      • 1...Bxc6
        • 2.Qf7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qd7#
      • 1...Sa1
        • 2.Sb4#
      • 1...Se1
        • 2.Sb4#
      • 1...Sa3
        • 2.Sb4#
      • 1...Se3
        • 2.Sb4#
      • 1...Sb4
        • 2.Sxb4#
      • 1...Sd4
        • 2.Sb4#
      • 1...Sf4
        • 2.Se7#
      • 1...Sh4
        • 2.Se7#
      • 1...Se7
        • 2.Sxe7#
      • 1...Sf8
        • 2.Se7#
      • 1...Sh8
        • 2.Se7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 11
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(g);N_GUARD::QAB(E)
    • B(g);N_GUARD::QAR2(E),XB(g)
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
    • S(e);N_GUARD::QAR1(E),XP(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • S(a);XS(B)::R1(C)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • Q(E);CHECK,N_PINP(c)
      • Vars
        • P(c);P_SPINP(c)::QAB1(E),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);N_PINP(c)
      • Threat
        • QAR1(E)
      • Vars
        • S(e);N_GUARD::QAR1(E),XP(c)
      • Refutation
        • P(f);XQ(E)
    • Try
      • P(A);
      • Vars
        • S(a);N_GUARD,XP(A)::R1(C)
        • S(a);N_GUARD::R1(C),XS(a)
        • B(g);N_GUARD::QAB(E)
        • B(g);N_GUARD::QAR2(E),XB(g)
        • S(a);N_GUARD::R1(C)
        • S(e);N_GUARD::QAR1(E),XP(c)
      • Refutation
        • S(e);
  • Actual
    • S(H);
    • Vars
      • K(b);N_GUARD,N_SPINP(c),S_FLIGHT,XS(H)::QAR2(E)
      • B(g);N_GUARD,SBLOCK,XS(H)::QAB(E)
      • B(g);N_GUARD::QAR2(E),XB(g)
      • B(g);N_GUARD::QAR2(E)
      • S(a);N_GUARD::S(H)
      • S(a);N_GUARD::S(H),XS(a)
      • S(e);N_GUARD::S(H)
      • S(e);N_GUARD::S(H),XS(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).