MESON Chess Problem Database

Problem Display
PID: 176445 (6K1/1B6/2N5/1k6/bPN5/1qRP4/4nB2/8 w - - 0 1)

Gross, Erwin

Schach-Echo, 1979

6K1/1B6/2N5/1k6/bPN5/1qRP4/4nB2/8

#2

8 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sa3#
      • 2.Sd6#
    • 1...Qc2
      • 2.Sa3#
      • 2.Sd6#
    • 1...Qxc4+
      • 2.dxc4#
    • 1...Qb1
      • 2.Sa3#
      • 2.Sd6#
    • 1...Qb2
      • 2.Sd6#
    • 1...Qa3
      • 2.Sxa3#
      • 2.Sd6#
    • 1...Qxc3
      • 2.Sd6#
    • 1...Qxb4
      • 2.Sa7#
  • Tries
    • 1.Kh7?
      • threat
        • 2.Sd6#
      • 1...Qxc4
        • 2.dxc4#
      • 1...Qxb4
        • 2.Sa7#
      • 1...Sd4!
    • 1.Rxb3?
      • threat
        • 2.Sa3#
        • 2.Sd6#
        • 2.Sa7#
      • 1...Sd4
        • 2.Sxd4#
        • 2.Sa7#
      • 1...Bxb3!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Sa7#
      • 1...Qxc4+
        • 2.dxc4#
      • 1...Qxb4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,OGATE,XS(E)::P(C),XQ(b)
    • Q(b);N_PINS(E)::S(E)
    • Q(b);N_PINS(E),XR(B)::S(E)
    • Q(b);N_PINS(E),SBLOCK,XP(D)::S(F)
  • Tries
    • Try
      • K(H);N_SPINS(E),S_FLIGHT
      • Threat
        • S(E)
      • Vars
        • Q(b);OGATE,XS(E)::P(C),XQ(b)
        • Q(b);SBLOCK,XP(D)::S(F)
      • Refutation
        • S(a);
    • Try
      • R(B);N_SPINS(E),XQ(b)
      • Threat
        • DUALS(3)
      • Refutation
        • B(c);P_PINS(E),XR(B)
  • Actual
    • B(A);
    • Threat
      • S(F)
    • Vars
      • Q(b);CHECK,OGATE,XS(E)::P(C),XQ(b)
      • Q(b);N_PINS(E),XP(D)::S(E)
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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).