MESON Chess Problem Database

Problem Display
PID: 144911 (qQ3n1k/2p5/2P3P1/1P2K1pP/3N4/1BB2P1p/2P1Pr2/6nb w - - 0 1)

Hartop, W

Norwich Mercury, 1902-1903

qQ3n1k/2p5/2P3P1/1P2K1pP/3N4/1BB2P1p/2P1Pr2/6nb

#2

12 + 9

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Qxf8#
    • 1...Qb7
      • 2.Qxf8#
    • 1...Qa1
      • 2.Qxf8#
    • 1...Qa2
      • 2.Qxf8#
    • 1...Qa4
      • 2.Qxf8#
    • 1...Qa5
      • 2.Qxf8#
    • 1...Qa6
      • 2.Qxf8#
    • 1...Qa7
      • 2.Qxf8#
  • Keys
    • 1.Ke4!
      • threat
        • 2.Sf5#
      • 1...Qxc6+
        • 2.Sxc6#
      • 1...Rxe2+
        • 2.Sxe2#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...Kg7
        • 2.Sf5#
      • 1...Rxf3
        • 2.Sxf3#
      • 1...Sxe2
        • 2.Sxe2#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...Qa1
        • 2.Qxf8#
      • 1...Qa4
        • 2.Qxf8#
      • 1...Qa5
        • 2.Qxf8#
      • 1...Qa7
        • 2.Qxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD,XP(J)::QAR2(L),XS(h)
    • Q(g);N_GUARD::QAR2(L),XS(h)
    • Q(g);N_GUARD,P_PINP(G)::QAR2(L),XS(h)
  • Actual
    • K(H);P-FLIGHT,P_SPINP(E)
    • Threat
      • B(D)+S(F)
    • Vars
      • Q(g);CHECK,XP(J)::B(D)+S(F),XQ(g)
      • R(c);CHECK,XP(B)::B(D)+S(F),XR(c)
      • B(b);CHECK,P_PINP(J),XP(E)::B(D)+S(F),XB(b)
      • K(i);N_SPINS(h),S_FLIGHT::B(D)+S(F),DCHECK
      • R(c);P_PINP(J),XP(E)::B(D)+S(F),XR(c)
      • S(a);XP(B)::B(D)+S(F),XS(a)
      • S(a);P_PINP(J),XP(E)::B(D)+S(F),XS(a)
      • Q(g);N_GUARD::QAR2(L),XS(h)
      • Q(g);N_GUARD,P_PINS(F)::QAR2(L),XS(h)
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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).