MESON Chess Problem Database

Problem Display
PID: 78055 (8/K1Npbp1P/1p6/8/R2Pk3/1N1p1R1p/7r/3Q1b2 w - - 0 1)

Harder, Karl

Welt am Abend, 1928

8/K1Npbp1P/1p6/8/R2Pk3/1N1p1R1p/7r/3Q1b2

#2

8 + 9

422 Suomen Tehtavaniekat 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sd2#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Re2
      • 2.Qxd3#
    • 1...Be2
      • 2.Sd2#
    • 1...Bg2
      • 2.Sd2#
      • 2.Qxd3#
  • Tries
    • 1.Rf4+?
      • 1...Ke3
        • 2.Sd5#
        • 2.Qf3#
      • 1...Kxf4!
    • 1.Qe2+?
      • 1...Bxe2
        • 2.Sd2#
      • 1...dxe2
        • 2.Sd2#
      • 1...Rxe2!
    • 1.Qe1+?
      • 1...Re2
        • 2.Sd2#
      • 1...Be2
        • 2.Sd2#
      • 1...Kxf3!
    • 1.Qxf1?
      • threat
        • 2.Qxd3#
      • 1...Rd2
        • 2.Sxd2#
      • 1...d2
        • 2.Qd3#
      • 1...Re2!
  • Keys
    • 1.h8Q!
      • threat
        • 2.Qe5#
      • 1...Re2
        • 2.Qxd3#
      • 1...Be2
        • 2.Sd2#
      • 1...Bd6
        • 2.Qa8#
      • 1...Bf6
        • 2.Qh7#
      • 1...d6
        • 2.d5#
      • 1...f6
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::S(B)
    • R(b);N_GUARD::S(B),XR(b)
    • R(b);S_CUTB(a)::QAB1(A),XP(c)
    • B(a);S_CUTR(b)::S(B)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(e);P-FLIGHT,XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);XQ(A)::S(B)
        • P(c);XQ(A)::S(B)
      • Refutation
        • R(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);P_SPINR(b)::S(B)
        • B(a);P_SPINB(a)::S(B)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
    • Try
      • Q(A);XB(a)
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • R(b);N_GUARD::S(B),XR(b)
        • P(c);::QAB1(A)
      • Refutation
        • R(b);
  • Actual
    • P(H);
    • Threat
      • QAR1(H)
    • Vars
      • R(b);S_CUTB(a)::QAB1(A),XP(c)
      • B(a);S_CUTR(b)::S(B)
      • B(h);S_CUTP(g)::QAB(H)
      • B(h);S_CUTP(i)::QAB(H)
      • P(g);S_CUTB(h)::R(D)+P(E)
      • P(i);S_CUTB(h)::QAR(H)
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).