MESON Chess Problem Database

Problem Display
PID: 18580 (NnK5/8/2kpp3/rr4b1/P7/3R4/1QB2B2/2R5 w - - 0 1)

Mansfield, Comins

4th HM., Tijdschrift vd KNSB, 1956

NnK5/8/2kpp3/rr4b1/P7/3R4/1QB2B2/2R5

#2

8 + 7

3550 Complete Mansfield/II 1997
45 Schach 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qxb5#
      • 2.axb5#
    • 1...Ra7
      • 2.Qxb5#
      • 2.axb5#
    • 1...Rxa8
      • 2.Qxb5#
      • 2.axb5#
    • 1...Rc5
      • 2.Qb6#
      • 2.Qb7#
    • 1...Rd5
      • 2.Qb6#
      • 2.Qb7#
    • 1...Re5
      • 2.Qb6#
      • 2.Qb7#
    • 1...Rf5
      • 2.Qb6#
      • 2.Qb7#
    • 1...Rb6
      • 2.Qxb6#
    • 1...Rb7
      • 2.Qxb7#
  • Tries
    • 1.Bb1+?
      • 1...Rc5
        • 2.Qb6#
        • 2.Qb7#
      • 1...Bxc1!
    • 1.Bd1+?
      • 1...Rc5
        • 2.Qb6#
        • 2.Qb7#
      • 1...Bxc1!
    • 1.Rd2?
      • threat
        • 2.Be4#
      • 1...Rc5
        • 2.Qb6#
        • 2.Qb7#
      • 1...Rd5
        • 2.Qb6#
        • 2.Qb7#
      • 1...d5!
    • 1.Rc3+?
      • 1...Rc5
        • 2.Qb7#
      • 1...Kd5!
  • Keys
    • 1.Re3!
      • threat
        • 2.Be4#
      • 1...Kc5
        • 2.Be4#
      • 1...Kd5
        • 2.Be4#
      • 1...Rxa8
        • 2.Qxb5#
      • 1...Rc5
        • 2.Qb7#
      • 1...Rd5
        • 2.Qb6#
      • 1...d5
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(b);OGATE::QAR1(B),XR(b)
    • R(b);OGATE::QAB1(B),XR(b)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • B(c);XR(A)
    • Try
      • B(C);CHECK
      • Refutation
        • B(c);XR(A)
    • Try
      • R(E);
      • Threat
        • R(A)+B(C),DCHECK
      • Refutation
        • P(e);
    • Try
      • R(E);CHECK
      • Vars
        • R(b);OGATE,P_SPINR(b)::QAB1(B)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • R(A)+B(C),DCHECK
    • Vars
      • K(d);P-FLIGHT::R(A)+B(C)
      • K(d);S_FLIGHT::B(C)
      • R(a);N_GUARD,XS(G)::QAB1(B),XR(b)
      • R(b);OGATE,SBLOCK::QAB1(B)
      • R(b);OGATE,SBLOCK::QAR1(B)
      • P(e);OGATEB,SBLOCK::R(E),XP(f)
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).