MESON Chess Problem Database

Problem Display
PID: 135348 (4n2N/5Rp1/2BPkb2/6r1/p2p2p1/1b1Q2B1/3nN3/K7 w - - 0 1)

Laib, Kurt Friedrich

Die Schwalbe, 1934

4n2N/5Rp1/2BPkb2/6r1/p2p2p1/1b1Q2B1/3nN3/K7

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Bd7#
    • 1...Bd5
      • 2.Bd7#
    • 1...Be7
      • 2.Sxd4#
    • 1...Bd8
      • 2.Sxd4#
  • Tries
    • 1.Rxf6+?
      • 1...Sxf6
        • 2.Sxd4#
      • 1...gxf6
        • 2.Sxd4#
      • 1...Kxf6!
    • 1.Qf5+?
      • 1...Kxf5
        • 2.Sxd4#
      • 1...Rxf5!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Bd7#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...Kf5
        • 2.Qe5#
      • 1...Be7
        • 2.Sf4#

This is a version

Version by Yves Cheylan.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);SBLOCK::B(E)
    • B(b);SBLOCK::B(E)
    • B(h);N_GUARD::S(B),XP(d)
  • Tries
    • Try
      • R(G);CHECK,XB(h)
      • Vars
        • S(j);SBLOCK,XR(G)::S(B),XP(d)
        • P(i);SBLOCK,XR(G)::S(B),XP(d)
      • Refutation
        • K(g);P-FLIGHT,XR(G)
    • Try
      • Q(C);CHECK
      • Vars
        • K(g);P_SPINB(h),S_FLIGHT,XQ(C)::S(B),XP(d)
      • Refutation
        • R(f);XQ(C)
  • Actual
    • Q(C);P_SPINQ(C),XP(d)
    • Threat
      • B(E)
    • Vars
      • B(h);CHECK,XQ(C)::S(B),XB(h)
      • K(g);P_SPINB(h),S_FLIGHT::QAR1(C)
      • B(h);N_PINQ(C)::S(B)
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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).