MESON Chess Problem Database

Problem Display
PID: 63046 (3B3K/Qp6/3p1P1R/1p2k1p1/1N2P1Rb/1B1p3r/3p4/5r2 w - - 0 1)

Pries, Alfred

Schach, 1952

3B3K/Qp6/3p1P1R/1p2k1p1/1N2P1Rb/1B1p3r/3p4/5r2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxa1#
    • 1...Rf2
      • 2.Qa1#
    • 1...Rff3
      • 2.Qa1#
    • 1...Rf5
      • 2.Qa1#
    • 1...Rxf6
      • 2.Bxf6#
      • 2.Qa1#
    • 1...Rh1
      • 2.Sxd3#
    • 1...Rh2
      • 2.Sxd3#
    • 1...Be1
      • 2.Qa1#
    • 1...Bg3
      • 2.Sxd3#
    • 1...d1B
      • 2.Qa1#
    • 1...b6
      • 2.Sc6#
  • Tries
    • 1.Qc5+?
      • 1...d5
        • 2.Qxd5#
      • 1...dxc5!
    • 1.Qxb7?
      • threat
        • 2.Sc6#
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Rc1
        • 2.Qd5#
      • 1...Rf4
        • 2.Qd5#
      • 1...Kd4!
  • Keys
    • 1.f7!
      • threat
        • 2.Re6#
      • 1...b6
        • 2.Sc6#
      • 1...Rf6
        • 2.Bxf6#
        • 2.Qa1#
      • 1...Be1
        • 2.Qa1#
      • 1...Bf2
        • 2.Bf6#
      • 1...Bg3
        • 2.Sxd3#
      • 1...d5
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::QAB(G),XR(a)
    • R(a);N_GUARD::QAB(G)
    • R(d);N_GUARD::S(B),XP(c)
    • B(e);P_PINR(F),S_CUTR(a)::QAB(G)
    • B(e);P_PINR(F),S_CUTR(d)::S(B),XP(c)
    • P(b);S_CUTR(a)::QAB(G)
    • P(j);N_GUARD::S(B)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • P(i);P_SPINP(i)::QAR1(G),XP(i)
      • Refutation
        • P(i);XQ(G)
    • Try
      • Q(G);XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • P(i);::QAR1(G),XP(i)
        • R(a);::QAR1(G)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • P(E);
    • Threat
      • R1(F)
    • Vars
      • P(j);N_GUARD::S(B)
      • B(e);P_PINR(F),S_CUTR(a)::QAB(G)
      • B(e);P_PINR(F),S_CUTR(a)::B(H)
      • B(e);P_PINR(F),S_CUTR(d)::S(B),XP(c)
      • P(i);OGATEB::B(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).