MESON Chess Problem Database

Problem Display
PID: 226722 (1b2K3/2pp1p2/2RpNBP1/pP1kN1p1/3p2Q1/2n2P2/8/7b w - - 0 1)

Gockel, Hubert

Die Schwalbe, 2020

1b2K3/2pp1p2/2RpNBP1/pP1kN1p1/3p2Q1/2n2P2/8/7b

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Sxc7#
    • 1...d3
      • 2.Qc4#
  • Tries
    • 1.Kxf7?
      • threat
        • 2.Qxd4#
      • 1...Sxb5
        • 2.Qe4#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Ba7
        • 2.Sxc7#
      • 1...Se2
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...d3
        • 2.Qc4#
        • 2.Qd4#
      • 1...dxe5!
    • 1.Sxd7?
      • threat
        • 2.Qf5#
      • 1...Sxb5
        • 2.Qe4#
      • 1...fxe6
        • 2.Qxd4#
      • 1...fxg6!
    • 1.Sxf7?
      • threat
        • 2.Qf5#
      • 1...Sxb5
        • 2.Qe4#
      • 1...dxe6
        • 2.Qxd4#
      • 1...dxc6!
  • Keys
    • 1.Kxd7!
      • threat
        • 2.Qxd4#
      • 1...Sxb5
        • 2.Qe4#
      • 1...dxe5
        • 2.Rc5#
      • 1...fxe6
        • 2.Qxe6#
      • 1...Ba7
        • 2.Sxc7#
      • 1...Se2
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...d3
        • 2.Qc4#
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(k);N_GUARD::S(F),XP(h)
    • P(c);OGATE::QAB1(B)
  • Tries
    • Try
      • K(I);S_FLIGHT,XP(j)
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • S(b);N_GUARD,XP(C)::QAB1(B)
        • P(i);OGATE,XS(F)::QAB1(B),XP(i)
        • B(k);N_GUARD::S(F),XP(h)
        • S(b);N_GUARD::QAB1(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • P(g);XS(D)
    • Try
      • S(D);XP(i)
      • Threat
        • QAR2(B)
      • Vars
        • S(b);N_GUARD,XP(C)::QAB1(B)
        • P(j);SBLOCK,XS(F)::QAR1(B),XP(c)
      • Refutation
        • P(j);XP(H)
    • Try
      • S(D);XP(j)
      • Threat
        • QAR2(B)
      • Vars
        • S(b);N_GUARD,XP(C)::QAB1(B)
        • P(i);SBLOCK,XS(F)::QAR1(B),XP(c)
      • Refutation
        • P(i);XR(E)
  • Actual
    • K(I);S_FLIGHT,XP(i)
    • Threat
      • QAR1(B),XP(c)
    • Vars
      • S(b);N_GUARD,XP(C)::QAB1(B)
      • P(g);N_GUARD,XS(D)::R1(E)
      • P(j);OGATE,XS(F)::QAB1(B),XP(j)
      • B(k);N_GUARD::S(F),XP(h)
      • S(b);N_GUARD::QAB1(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
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).