MESON Chess Problem Database

Problem Display
PID: 37989 (4r1b1/1p1R2n1/8/2Q3p1/2PNk1Nq/7p/4P2B/b2r1RnK w - - 0 1)

Hartong, Jan

1st Prize, British Chess Magazine, 1953

4r1b1/1p1R2n1/8/2Q3p1/2PNk1Nq/7p/4P2B/b2r1RnK

#2

9 + 11

3105 FIDE Album (1945-1955) 1964
56 The Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Re6
      • 2.Qd5#
    • 1...Ra8
      • 2.Qe5#
    • 1...Rb8
      • 2.Qe5#
    • 1...Rc8
      • 2.Qe5#
    • 1...Rd8
      • 2.Qe5#
    • 1...Rf8
      • 2.Qe5#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Be6
      • 2.Qe5#
    • 1...Bh7
      • 2.Qd5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
    • 1...Se6
      • 2.Qd5#
      • 2.Qe5#
      • 2.Qf5#
  • Tries
    • 1.Se6?
      • threat
        • 2.Qe3#
      • 1...Rxf1
        • 2.Qd5#
      • 1...Qg3
        • 2.Sxg5#
      • 1...Qf2
        • 2.Sxf2#
        • 2.Sxg5#
      • 1...Rd3
        • 2.exd3#
      • 1...Rd4
        • 2.Qe5#
      • 1...Bd4
        • 2.Qd5#
      • 1...Sf3
        • 2.exf3#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Qxg4!
    • 1.Re7+?
      • 1...Be6
        • 2.Qd5#
        • 2.Qe5#
      • 1...Se6
        • 2.Qd5#
        • 2.Qe5#
      • 1...Rxe7!
    • 1.Qc6+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...bxc6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe3#
      • 1...Rxf1
        • 2.Sd6#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Qg3
        • 2.Sxg3#
      • 1...Qf2
        • 2.Sxf2#
      • 1...Rd3
        • 2.exd3#
      • 1...Rd4
        • 2.Sf6#
      • 1...Bd4
        • 2.Sd6#
      • 1...Sf3
        • 2.exf3#

This is a version of 76997

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 11
  • Sets
    • R(j);N_GUARD::QAR1(H),XR(j)
    • R(j);S_CUTB(k)::QAB1(H)
    • R(j);N_GUARD::QAR1(H)
    • B(k);N_GUARD::QAB1(H),XB(k)
    • B(k);S_CUTR(j)::QAR1(H)
    • B(k);N_GUARD::QAB1(H)
    • S(i);N_GUARD::QAB1(H),XS(i)
    • S(i);N_GUARD::QAB1(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(H)
      • Vars
        • R(b);N_GUARD,XR(A)::QAB1(H)
        • Q(f);N_GUARD::S(F),XP(g)
        • R(b);OGATE::P(C),XR(b)
        • R(b);S_CUTB(a)::QAR1(H)
        • B(a);S_CUTR(b)::QAB1(H)
        • S(c);OGATE,P_PINR(A)::P(C),XS(c)
        • S(i);N_GUARD::QAB1(H),XS(i)
      • Refutation
        • Q(f);XS(G)
    • Try
      • R(I);CHECK
      • Refutation
        • R(j);XR(I)
    • Try
      • Q(H);CHECK
      • Vars
        • B(k);N_GUARD,P_SPINB(k)::QAB1(H),XB(k)
      • Refutation
        • P(h);XQ(H)
  • Actual
    • S(F);
    • Threat
      • QAR1(H)
    • Vars
      • R(b);N_GUARD,XR(A)::S(F)
      • S(i);OGATE,XS(F)::QAB1(H),XS(i)
      • Q(f);N_GUARD::S(F),XQ(f)
      • Q(f);N_GUARD::S(G),XQ(f)
      • R(b);OGATE::P(C),XR(b)
      • R(b);S_CUTB(a)::S(G)
      • B(a);S_CUTR(b)::S(F)
      • S(c);OGATE,P_PINR(A)::P(C),XS(c)
HTML5 logo

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).