MESON Chess Problem Database

Problem Display
PID: 109216 (1qbN2B1/1P3r2/2N3R1/2Bkrp1R/1Pp5/3P1Kp1/2P3Q1/b7 w - - 0 1)

Prytz, Rudolf

Fyens Stifstidende, 1925

1qbN2B1/1P3r2/2N3R1/2Bkrp1R/1Pp5/3P1Kp1/2P3Q1/b7

#2

12 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qa7
      • 2.Rd6#
    • 1...Qxb7
      • 2.Rd6#
    • 1...Qa8
      • 2.Rd6#
    • 1...Re2
      • 2.Kxe2#
    • 1...Re3+
      • 2.Kxe3#
    • 1...Re4
      • 2.dxe4#
    • 1...f4
      • 2.Se7#
  • Tries
    • 1.Bxf7+?
      • 1...Be6
        • 2.Se7#
      • 1...Re6!
  • Keys
    • 1.Rg4!
      • threat
        • 2.dxc4#
      • 1...Re3+
        • 2.Kxe3#
      • 1...fxg4+
        • 2.Kxg3#
      • 1...cxd3
        • 2.c4#
      • 1...Re4
        • 2.dxe4#
      • 1...Bd4
        • 2.Rxd4#
      • 1...c3
        • 2.Rd4#
      • 1...f4
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_GUARD::R1(I),XQ(h)
    • Q(h);N_GUARD::R1(I)
    • Q(h);N_GUARD,XP(J)::R1(I)
    • R(e);P_SPINP(f)::QAB(B)+K(D),XR(e)
    • R(e);CHECK,P_SPINP(f)::QAB(B)+K(D),XR(e)
    • R(e);OGATE,P_SPINP(f)::P(C),XR(e)
    • P(f);N_SPINR(g),P_SPINR(e)::S(H)
  • Tries
    • Try
      • B(L);CHECK,XR(g)
      • Vars
        • B(i);P_SPINB(i)::S(H)
      • Refutation
        • R(e);P_SPINP(f),P_SPINR(e)
  • Actual
    • R(I);
    • Threat
      • P(C),XP(c)
    • Vars
      • R(e);CHECK,P_SPINP(f)::QAB(B)+K(D),XR(e)
      • P(f);CHECK,N_SPINR(g),P_SPINR(e),XR(I)::QAB(B)+K(D),XP(b)
      • P(c);OGATE,XP(C)::P(A)
      • R(e);OGATE,P_SPINP(f)::P(C),XR(e)
      • B(a);N_GUARD::R1(I),XB(a)
      • P(c);S_CUTB(a)::R1(I)
      • P(f);N_SPINR(g),P_SPINR(e)::S(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).