MESON Chess Problem Database

Problem Display
PID: 716 (K2n1BB1/nP6/3N4/1P5R/bk6/5q1r/1P6/Q1R5 w - - 0 1)

Mansfield, Comins

1st Prize, British Chess Magazine, 1941/II

K2n1BB1/nP6/3N4/1P5R/bk6/5q1r/1P6/Q1R5

#2

10 + 6

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Sc4#
    • 1...Qxb7+
      • 2.Sxb7#
    • 1...Qb3
      • 2.Sc4#
    • 1...Bb3
      • 2.Sf7#
      • 2.Qa3#
    • 1...Bxb5
      • 2.Sf5#
  • Tries
    • 1.Sc4+?
      • 1...Kb3
        • 2.Sd2#
        • 2.Sa5#
        • 2.Qa3#
      • 1...Qxf8!
    • 1.Sf7+?
      • 1...Kb3
        • 2.Qa3#
      • 1...Ka5!
    • 1.Sc8+?
      • 1...Ka5
        • 2.b4#
      • 1...Qxf8!
    • 1.Bb3?
      • threat
        • 2.Qxa4#
      • 1...Kxb3
        • 2.Qa3#
      • 1...Ka5
        • 2.Sc4#
      • 1...Qxb3
        • 2.Sc4#
      • 1...Bxb3
        • 2.Sf7#
        • 2.Qa3#
      • 1...Bxb5
        • 2.Qa3#
      • 1...Qxb7+!
    • 1.Rc4+?
      • 1...Kb3
        • 2.Qa3#
      • 1...Ka5!
    • 1.Qa3+?
      • 1...Ka5
        • 2.Sc4#
      • 1...Qxa3!
  • Keys
    • 1.b3!
      • threat
        • 2.Qxa4#
      • 1...Qxb7+
        • 2.Sxb7#
      • 1...Ka5
        • 2.Sc4#
      • 1...Qxb3
        • 2.Sc4#
      • 1...Bxb3
        • 2.Sf7#
      • 1...Bxb5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINB(c),S_FLIGHT::S(F)
    • Q(a);CHECK,XP(G)::B(I)+S(F),XQ(a)
    • Q(a);N_GUARD,N_PINP(G),SBLOCK::B(I)+S(F)
    • B(c);SBLOCK,XP(D)::B(I)+S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • Q(a);N_PINP(G),XB(I)
    • Try
      • S(F);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • K(d);P_SPINB(c),S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(d);OGATE,P_SPINB(c),S_FLIGHT::P(C)
      • Refutation
        • Q(a);N_PINP(G),XB(I)
    • Try
      • B(J);
      • Threat
        • QAR1(A),XB(c)
      • Vars
        • K(d);P-FLIGHT,XB(J)::QAR1(A)
        • K(d);P_SPINB(c),S_FLIGHT::S(F)
        • Q(a);N_GUARD,N_PINP(G),SBLOCK,XB(J)::B(I)+S(F)
        • B(c);XP(D)::QAB1(A)
      • Refutation
        • Q(a);CHECK,XP(G)
    • Try
      • R(B);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • K(d);P_SPINB(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P_SPINB(c),S_FLIGHT::S(F)
      • Refutation
        • Q(a);N_PINP(G),XQ(A)
  • Actual
    • P(C);
    • Threat
      • QAR1(A),XB(c)
    • Vars
      • Q(a);CHECK,XP(G)::B(I)+S(F),XQ(a)
      • K(d);P_SPINB(c),S_FLIGHT::S(F)
      • Q(a);N_GUARD,N_PINP(G),SBLOCK,XP(C)::B(I)+S(F)
      • B(c);SBLOCK,XP(C)::B(I)+S(F)
      • B(c);SBLOCK,XP(D)::B(I)+S(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).