MESON Chess Problem Database

Problem Display
PID: 273768 (5b2/4N3/r4nb1/p1nrp1p1/3p1kPp/K1R4Q/1N3P1p/3BB2q w - - 0 1)

Smith, James Alfred John

The Problemist, 1932

5b2/4N3/r4nb1/p1nrp1p1/3p1kPp/K1R4Q/1N3P1p/3BB2q

#2

9 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxf3#
    • 1...Qe4
      • 2.Qxh2#
    • 1...Qxe1
      • 2.Qf3#
    • 1...Qf1
      • 2.Qf3#
    • 1...Qg1
      • 2.Qf3#
    • 1...Be4
      • 2.Bd2#
    • 1...Sce4
      • 2.Sd3#
    • 1...Sfe4
      • 2.Sxd5#
    • 1...Sxg4
      • 2.Qxg4#
    • 1...dxc3
      • 2.Qe3#
    • 1...d3
      • 2.Qe3#
    • 1...e4
      • 2.Sxg6#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Sxg6#
        • 2.Bd2#
      • 1...Qxf3
        • 2.Qxf3#
      • 1...Qxe1
        • 2.Sxg6#
        • 2.Qxh2#
      • 1...Bxe7
        • 2.Bd2#
      • 1...Sxg4
        • 2.Qxg4#
      • 1...dxc3
        • 2.Sxg6#
      • 1...e4
        • 2.Sxg6#
      • 1...Bb1
        • 2.Bd2#
      • 1...Bc2
        • 2.Bd2#
      • 1...Bd3
        • 2.Bd2#
      • 1...Be4
        • 2.Bd2#
      • 1...Bf5
        • 2.Bd2#
      • 1...Bh5
        • 2.Bd2#
      • 1...Bf7
        • 2.Bd2#
      • 1...Bh7
        • 2.Bd2#
      • 1...Be8
        • 2.Bd2#
      • 1...Sd3
        • 2.Bd2#
      • 1...Sa4
        • 2.Bd2#
      • 1...Sce4
        • 2.Sd3#
      • 1...Se6
        • 2.Bd2#
      • 1...Sb7
        • 2.Bd2#
      • 1...Scd7
        • 2.Bd2#
      • 1...Sfe4
        • 2.Sxd5#
      • 1...Sh5
        • 2.Sxd5#
        • 2.Bd2#
      • 1...Sfd7
        • 2.Sxd5#
        • 2.Bd2#
      • 1...Sh7
        • 2.Sxd5#
        • 2.Bd2#
      • 1...Se8
        • 2.Sxd5#
        • 2.Bd2#
      • 1...Sg8
        • 2.Sxd5#
        • 2.Bd2#
      • 1...Sb3!
    • 1.Rf3+?
      • 1...Qxf3+
        • 2.Qxf3#
      • 1...Ke4!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qe3#
      • 1...Qf3+
        • 2.Qxf3#
      • 1...Ke4
        • 2.Qe3#
      • 1...Qxe1
        • 2.Qf3#
      • 1...Sxg4
        • 2.Qxg4#
      • 1...Qe4
        • 2.Qxh2#
      • 1...Be4
        • 2.Bd2#
      • 1...Sce4
        • 2.Sd3#
      • 1...Sfe4
        • 2.Sxd5#
      • 1...e4
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD,P_PINR(F)::QAR1(G),XQ(a)
    • Q(a);N_GUARD,SBLOCK::QAB(G),XP(b)
    • Q(a);N_GUARD,XB(B)::QAR1(G)
    • Q(a);N_GUARD::QAR1(G)
    • B(m);SBLOCK::B(B)
    • S(g);N_GUARD,P_PINS(I),SBLOCK,S_CUTB(m)::S(C)
    • S(l);N_GUARD,SBLOCK,S_CUTQ(a)::S(I),XR(h)
    • S(l);OGATE,XP(H)::QAR1(G),XS(l)
    • P(c);N_GUARD,XR(F)::QAB1(G)
    • P(c);N_GUARD::QAB1(G)
    • P(i);SBLOCK::S(I),XB(m)
  • Tries
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);OGATE,P_PINR(F),XB(A)::QAR1(G),XQ(a)
        • B(n);XS(I)::B(B)
        • S(l);OGATE,XP(H)::QAR1(G),XS(l)
        • P(c);XR(F)::S(I),XB(m)
        • P(i);::S(I),XB(m)
        • B(m);::B(B)
        • S(g);P_PINS(I)::B(B)
        • S(g);N_GUARD,P_PINS(I),S_CUTB(m)::S(C)
        • S(l);N_GUARD::S(I),XR(h)
      • Refutation
        • S(g);P_PINS(I)
    • Try
      • R(F);CHECK
      • Vars
        • Q(a);CHECK,OGATE,XR(F)::QAR1(G),XQ(a)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • R(F);P_PINP(c)
    • Threat
      • QAB1(G)
    • Vars
      • Q(a);CHECK,N_GUARD::QAR1(G),XQ(a)
      • K(d);P-FLIGHT::QAR1(G)
      • Q(a);N_GUARD,XB(B)::QAR1(G)
      • S(l);OGATE,XP(H)::QAR1(G),XS(l)
      • Q(a);N_GUARD,N_SPINP(c),SBLOCK::QAB(G),XP(b)
      • B(m);N_SPINP(c),SBLOCK::B(B)
      • S(g);N_GUARD,N_SPINP(c),P_PINS(I),SBLOCK,S_CUTB(m)::S(C)
      • S(l);N_GUARD,N_SPINP(c),SBLOCK,S_CUTQ(a)::S(I),XR(h)
      • P(i);N_SPINP(c),SBLOCK::S(I),XB(m)
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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).