MESON Chess Problem Database

Problem Display
PID: 541 (n6q/2RB2n1/3pP3/1p1k1p2/1Pp2Pp1/4K1P1/1N1p4/Q7 w - - 0 1)

Mansfield, Comins

2nd Prize, The Observer, 1961

n6q/2RB2n1/3pP3/1p1k1p2/1Pp2Pp1/4K1P1/1N1p4/Q7

#2

9 + 10

3550 Complete Mansfield/II 1907
3749 FIDE Album (1959-1961) 1966
4640 Chess Wizardry: The New ABC of Chess Problems 1996
6455 The Chessboard Adventures of Norman Macleod 1996
133 The Problemist Supplement 2010
133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qxh1#
      • 2.Qxa8#
    • 1...Qh2
      • 2.Qxa8#
    • 1...Qh3
      • 2.Qxa8#
    • 1...Qh4
      • 2.Qxa8#
    • 1...Qh5
      • 2.Qxa8#
    • 1...Qh6
      • 2.Qxa8#
    • 1...Qh7
      • 2.Qxa8#
    • 1...Qb8
      • 2.Qh1#
    • 1...Qc8
      • 2.Qh1#
    • 1...Qd8
      • 2.Qh1#
    • 1...Qe8
      • 2.Qh1#
    • 1...Qf8
      • 2.Qh1#
    • 1...Qg8
      • 2.Qh1#
    • 1...Sh5
      • 2.Qh1#
    • 1...Sxe6
      • 2.Bc6#
    • 1...Se8
      • 2.Qxa8#
    • 1...d1Q
      • 2.Qxd1#
    • 1...d1S+
      • 2.Qxd1#
    • 1...d1B
      • 2.Qxd1#
    • 1...d1R
      • 2.Qxd1#
    • 1...c3
      • 2.Qa2#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Sc3#
        • 2.Qd4#
      • 1...Sxe6
        • 2.Bc6#
      • 1...Se8
        • 2.Qxa8#
      • 1...c3
        • 2.Sxc3#
        • 2.Qa2#
      • 1...Sh5!
    • 1.Sd3?
      • threat
        • 2.Qd4#
      • 1...Sxe6
        • 2.Bc6#
      • 1...Sh5
        • 2.Qh1#
      • 1...Se8
        • 2.Qxa8#
      • 1...c3
        • 2.Qa2#
      • 1...d1S+!
    • 1.Sa4?
      • threat
        • 2.Sc3#
        • 2.Qd4#
      • 1...d1S+
        • 2.Qxd1#
      • 1...Sxe6
        • 2.Bc6#
      • 1...bxa4
        • 2.Qd4#
      • 1...d1Q
        • 2.Sc3#
        • 2.Qxd1#
      • 1...d1R
        • 2.Sc3#
        • 2.Qxd1#
      • 1...Sh5
        • 2.Qh1#
      • 1...c3
        • 2.Sxc3#
        • 2.Qa2#
      • 1...Se8!
    • 1.Sxc4?
      • threat
        • 2.Qd4#
      • 1...d1S+
        • 2.Qxd1#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Sh5
        • 2.Qh1#
      • 1...Se8
        • 2.Qxa8#
      • 1...Sxe6!
    • 1.Qa6?
      • threat
        • 2.Qxb5#
        • 2.Qb7#
        • 2.Qc6#
      • 1...Sxe6
        • 2.Bc6#
        • 2.Qb7#
        • 2.Qc6#
      • 1...Sxc7
        • 2.Qb7#
        • 2.Qc6#
      • 1...Qb8
        • 2.Qc6#
      • 1...Qc8
        • 2.Qxb5#
        • 2.Qc6#
      • 1...Sb6
        • 2.Qxb5#
        • 2.Qb7#
      • 1...d1S+!
    • 1.Qa7?
      • threat
        • 2.Qd4#
        • 2.Qb7#
      • 1...Sxe6
        • 2.Bc6#
        • 2.Qb7#
      • 1...d1Q
        • 2.Qb7#
      • 1...d1R
        • 2.Qb7#
      • 1...Qb8
        • 2.Qd4#
      • 1...Qc8
        • 2.Qd4#
      • 1...Sh5
        • 2.Qb7#
      • 1...Se8
        • 2.Qb7#
        • 2.Qxa8#
      • 1...Sb6
        • 2.Qb7#
      • 1...d1S+!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.Rd4#
      • 1...d1S+
        • 2.Qxd1#
      • 1...Sxe6
        • 2.Bc6#
      • 1...bxc4
        • 2.Qa5#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Sh5
        • 2.Qh1#
      • 1...Se8
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 14
  • Sets
    • Q(j);N_GUARD::QAB(A),XS(i)
    • Q(j);N_GUARD,P_PINP(D)::QAB(A),XS(i)
    • Q(j);N_GUARD,P_PINP(F)::QAB(A),XS(i)
    • Q(j);N_GUARD::QAB(A)
    • Q(j);N_GUARD,P_PINP(G)::QAB(A)
    • S(h);S_CUTQ(j)::QAB(A)
    • S(h);SBLOCK,XP(G)::B(I)
    • S(h);S_CUTQ(j)::QAB(A),XS(i)
    • P(a);OGATEB::QAR(A),XQ(a)
    • P(a);CHECK,OGATEB::QAR(A),XS(a)
    • P(a);OGATEB::QAR(A),XB(a)
    • P(a);OGATEB::QAR(A),XR(a)
    • P(b);OGATEB::QAB(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);SBLOCK,XP(G)::B(I)
        • S(h);S_CUTQ(j)::QAB(A),XS(i)
      • Refutation
        • S(h);
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • S(h);SBLOCK,XP(G)::B(I)
        • S(h);S_CUTQ(j)::QAB(A)
        • S(h);S_CUTQ(j)::QAB(A),XS(i)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(a);CHECK
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);CHECK,OGATEB::QAR(A),XS(a)
        • S(h);SBLOCK,XP(G)::B(I)
        • P(d);XS(B)::QAR1(A)
        • S(h);S_CUTQ(j)::QAB(A)
      • Refutation
        • S(h);
    • Try
      • S(B);XP(b)
      • Threat
        • QAR1(A)
      • Vars
        • P(a);CHECK,OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XR(a)
        • S(h);S_CUTQ(j)::QAB(A)
        • S(h);S_CUTQ(j)::QAB(A),XS(i)
      • Refutation
        • S(h);XP(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(j);::QAB1(A)
      • Refutation
        • P(a);CHECK
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB(A)
        • Q(j);::QAR1(A)
        • S(h);::QAB(A)
        • S(i);::QAB(A)
      • Refutation
        • P(a);CHECK
  • Actual
    • R(H);XP(b)
    • Threat
      • R1(H)
    • Vars
      • P(a);CHECK,OGATEB::QAR(A),XS(a)
      • S(h);SBLOCK,XP(G)::B(I)
      • P(d);OGATEB,XR(H)::QAR(A)
      • P(a);OGATEB::QAR(A),XQ(a)
      • P(a);OGATEB::QAR(A),XR(a)
      • S(h);S_CUTQ(j)::QAB(A)
      • S(h);S_CUTQ(j)::QAB(A),XS(i)
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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).