MESON Chess Problem Database

Problem Display
PID: 21860 (2n5/2N2Q2/4p1p1/3p2K1/4k3/4rN2/2P1bPn1/1B2R3 w - - 0 1)

Mansfield, Comins

In Traway (Lo Scacchistica), 1921

2n5/2N2Q2/4p1p1/3p2K1/4k3/4rN2/2P1bPn1/1B2R3

#2

8 + 8

3360 Simple Two-move Themes 1924
20 De Problemist 1929
4797 A Genius of the Two-mover 1936
56 The Problemist 1937
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.c3#
    • 1...Rb3
      • 2.cxb3#
    • 1...Rd3
      • 2.cxd3#
    • 1...Bd3
      • 2.cxd3#
    • 1...Bb5
      • 2.c4#
    • 1...Ba6
      • 2.c4#
    • 1...Sxe1
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sh4
      • 2.Qf4#
    • 1...e5
      • 2.Qxd5#
  • Keys
    • 1.Sb5!
      • 1...Rxf3
        • 2.Qxe6#
      • 1...Bxf3
        • 2.Qxe6#
      • 1...Bxb5
        • 2.c4#
      • 1...Sxe1
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...d4
        • 2.Qb7#
      • 1...Ra3
        • 2.c3#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Rd3
        • 2.cxd3#
      • 1...Bd1
        • 2.Sc3#
      • 1...Bf1
        • 2.Sc3#
      • 1...Bd3
        • 2.Sc3#
        • 2.cxd3#
      • 1...Bc4
        • 2.Sc3#
      • 1...Sh4
        • 2.Qf4#
      • 1...Sb6
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...e5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD,P_SPINB(a)::B(A)+P(C)
    • R(c);OGATE,P_SPINB(a)::B(A)+P(C),XR(c)
    • R(c);OGATE,P_SPINB(a)::P(C),XR(c)
    • B(a);OGATE,P_SPINR(c)::P(C),XB(a)
    • B(a);N_GUARD,P_SPINR(c)::B(A)+P(C)
    • S(b);N_GUARD,XR(B)::QAR1(H)
    • S(b);N_GUARD::QAR1(H),XS(b)
    • S(b);N_GUARD::QAR1(H)
    • P(f);OGATE::QAB1(H),XP(e)
  • Actual
    • S(G);
    • Vars
      • R(c);P_SPINB(a),SBLOCK,XS(E)::QAR2(H),XP(f)
      • B(a);P_SPINR(c),SBLOCK,XS(E)::QAR2(H),XP(f)
      • B(a);N_GUARD,P_SPINR(c),XS(G)::B(A)+P(C)
      • S(b);N_GUARD,XR(B)::QAR1(H)
      • S(b);N_GUARD::QAR1(H),XS(b)
      • P(e);OGATEB::QAB(H)
      • R(c);N_GUARD,P_SPINB(a)::B(A)+P(C)
      • R(c);OGATE,P_SPINB(a)::B(A)+P(C),XR(c)
      • R(c);N_GUARD,P_SPINB(a)::S(G),XR(c)
      • R(c);OGATE,P_SPINB(a)::P(C),XR(c)
      • B(a);P_SPINR(c)::S(G)
      • S(b);N_GUARD::QAR1(H)
      • S(h);N_GUARD::S(G)
      • S(h);N_GUARD::S(G),XS(h)
      • P(f);SBLOCK::S(E)
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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).