MESON Chess Problem Database

Problem Display
PID: 250619 (2RR1n2/1p1bb1P1/1QN2p2/1K1k1N1r/4pP2/p3p2B/1P2P3/3r4 w - - 0 1)

Ebben, Jacobus Johannes

Seilberger, Johann Joseph Petrus Adrianus

Problem (Zagreb), 1952

2RR1n2/1p1bb1P1/1QN2p2/1K1k1N1r/4pP2/p3p2B/1P2P3/3r4

#2

11 + 11

72 Arbejder-Skak 1952

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.g8Q#
      • 2.g8B#
    • 1...Bd6
      • 2.Sxe3#
    • 1...Sg6
      • 2.g8Q#
      • 2.g8B#
    • 1...Sh7
      • 2.g8Q#
      • 2.g8B#
    • 1...bxc6+
      • 2.Qxc6#
  • Tries
    • 1.Rxd7+?
      • 1...Bd6
        • 2.Sxe3#
        • 2.Sfe7#
        • 2.Rxd6#
      • 1...Sxd7
        • 2.Scxe7#
        • 2.g8Q#
        • 2.g8B#
      • 1...Ke6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.g8Q#
        • 2.g8B#
      • 1...Rxd4!
    • 1.Qc5+?
      • 1...Ke6
        • 2.g8Q#
        • 2.g8B#
      • 1...Bxc5!
  • Keys
    • 1.Ka5!
      • threat
        • 2.Scxe7#
      • 1...Bb4+
        • 2.Sxb4#
      • 1...Kc4
        • 2.Qb5#
      • 1...Ke6
        • 2.g8Q#
        • 2.g8B#
      • 1...Bxd8
        • 2.Sb4#
      • 1...bxc6
        • 2.Qxc6#
      • 1...Bc5
        • 2.Qb3#
      • 1...Bd6
        • 2.Sxe3#
      • 1...Sg6
        • 2.g8Q#
        • 2.g8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(e);N_PINS(H),N_SPINB(i),P_PINS(F),S_CUTS(k),S_FLIGHT::P=Q
    • B(j);N_SPINB(i),SBLOCK::S(F),XP(c)
    • S(k);N_GUARD::P=Q
    • P(h);CHECK,OGATE,XS(H)::QAB1(G),XP(h)
  • Tries
    • Try
      • R(K);CHECK,N_SPINS(H),XB(i)
      • Refutation
        • K(e);P_PINS(F),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);N_PINS(H),N_SPINB(i),P_PINS(F),S_FLIGHT::P=Q
      • Refutation
        • R(a);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);N_SPINB(i),S_FLIGHT::P=Q
      • Refutation
        • B(j);XQ(G)
  • Actual
    • K(E);N_SPINS(H),P-FLIGHT
    • Threat
      • S(H),XB(j)
    • Vars
      • B(j);CHECK,N_GUARD::S(H),XB(j)
      • K(e);N_GUARD,N_SPINB(i),P_PINS(F),S_CUTB(j),S_FLIGHT::QAB1(G)
      • K(e);N_SPINB(i),P_PINS(F),S_CUTS(k),S_FLIGHT::P=Q
      • B(j);N_GUARD,N_SPINB(i),P_PINQ(G),XR(K)::S(H)
      • P(h);OGATE,XS(H)::QAB1(G),XP(h)
      • B(j);SBLOCK::QAB(G)
      • B(j);N_SPINB(i),SBLOCK::S(F),XP(c)
      • S(k);N_GUARD::P=Q
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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).