MESON Chess Problem Database

Problem Display
PID: 66854 (7b/p5B1/r1R3KQ/r3p1np/1N1k4/5Bpp/2RPP3/1b4qN w - - 0 1)

Waterhouse, T

Chess, 1947

7b/p5B1/r1R3KQ/r3p1np/1N1k4/5Bpp/2RPP3/1b4qN

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.e3#
    • 1...Qc1
      • 2.e3#
    • 1...Qd1
      • 2.e3#
    • 1...Qf1
      • 2.e3#
    • 1...Qxh1
      • 2.e3#
    • 1...Qg2
      • 2.e3#
    • 1...Rxc6+
      • 2.Sxc6#
    • 1...Bxc2+
      • 2.Sxc2#
    • 1...Sxf3
      • 2.Qf4#
    • 1...Se4
      • 2.Rc4#
    • 1...Se6
      • 2.Rc4#
    • 1...Sf7
      • 2.Qf4#
    • 1...Sh7
      • 2.Qf4#
  • Tries
    • 1.Qxg5?
      • threat
        • 2.Qf4#
        • 2.Qh4#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Bxc2+
        • 2.Sxc2#
      • 1...Qe3
        • 2.Qxe3#
        • 2.dxe3#
      • 1...h4
        • 2.Qf4#
        • 2.Qxh4#
        • 2.Qg4#
      • 1...Bxg7!
  • Keys
    • 1.Sxg3!
      • threat
        • 2.Sf5#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Bxc2+
        • 2.Sxc2#
      • 1...Qxg3
        • 2.e3#
      • 1...Sxf3
        • 2.Qf4#
      • 1...Se4
        • 2.Rc4#
      • 1...Se6
        • 2.Rc4#
      • 1...Sf7
        • 2.Qf4#
      • 1...Sh7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::P(D)
    • Q(b);N_GUARD,XS(A)::P(D)
    • R(j);CHECK,XR(G)::S(F),XR(j)
    • B(a);CHECK,P_PINR(G),XR(B)::S(F),XB(a)
    • S(h);OGATE,XB(E)::QAR2(I)
    • S(h);N_PINR(B),P_PINR(G)::R1(B)
    • S(h);OGATE::R1(G)
    • S(h);OGATE::QAR2(I)
  • Tries
    • Try
      • Q(I);XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(j);CHECK,XR(G)::S(F),XR(j)
        • B(a);CHECK,P_PINR(G),XR(B)::S(F),XB(a)
      • Refutation
        • B(l);N_SPINP(g),XB(J)
  • Actual
    • S(A);XP(c)
    • Threat
      • S(A)
    • Vars
      • R(j);CHECK,XR(G)::S(F),XR(j)
      • B(a);CHECK,P_PINR(G),XR(B)::S(F),XB(a)
      • Q(b);N_GUARD,XS(A)::P(D)
      • S(h);OGATE,P_PINS(A),XB(E)::QAR2(I)
      • S(h);N_PINR(B),P_PINR(G),P_PINS(A)::R1(B)
      • S(h);OGATE,P_PINS(A)::R1(G)
      • S(h);OGATE,P_PINS(A)::QAR2(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).