MESON Chess Problem Database

Problem Display
PID: 161599 (1b6/4Q3/q3PpK1/3Bkp2/1npRp1p1/r5P1/2NN2rB/4R3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Scacco!, 1980

1b6/4Q3/q3PpK1/3Bkp2/1npRp1p1/r5P1/2NN2rB/4R3

#2

10 + 11

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Sxc4#
    • 1...Qa4
      • 2.Sxc4#
    • 1...Qa5
      • 2.Sxc4#
    • 1...Qb6
      • 2.Sxc4#
    • 1...Qd6
      • 2.Sxc4#
      • 2.Qxf6#
    • 1...Qxe6
      • 2.Sxc4#
      • 2.Qxe6#
    • 1...Qa7
      • 2.Sxc4#
    • 1...Qa8
      • 2.Sxc4#
    • 1...Bd6
      • 2.Qxf6#
    • 1...f4
      • 2.Rexe4#
      • 2.gxf4#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Qxf6#
      • 1...Qxe6
        • 2.Qxe6#
      • 1...Rgxg3
        • 2.Sc3#
      • 1...Raxg3
        • 2.Sf2#
      • 1...fxe4
        • 2.Rexe4#
      • 1...Sxd5!
    • 1.Rdxe4+?
      • 1...Kxd5
        • 2.Sxb4#
      • 1...fxe4!
    • 1.Qc7+?
      • 1...Qd6
        • 2.Sxc4#
      • 1...Bxc7!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Qxf6#
      • 1...Qxe6
        • 2.Sxc4#
      • 1...Rgxg3
        • 2.Bd3#
      • 1...Raxg3
        • 2.Bxg2#
      • 1...Sd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(i);N_GUARD::S(C),XP(d)
    • B(k);SBLOCK::QAB1(J),XP(j)
  • Tries
    • Try
      • S(C);XP(e)
      • Threat
        • QAB1(J),XP(j)
      • Vars
        • Q(i);OGATE,P_SPINQ(i),XP(H)::QAR1(J),XQ(i)
        • R(a);N_GUARD,P_SPINR(a),XP(E)::R(A)+S(C)
        • R(b);N_GUARD,P_SPINR(b),XP(E)::R(A)+S(C)
        • P(h);OGATE,P_SPINP(h),XS(C)::R1(A),XP(h)
      • Refutation
        • S(c);XB(G)
    • Try
      • R(F);CHECK,XP(e)
      • Vars
        • K(g);P-FLIGHT,XB(G)::S(B),XS(c)
      • Refutation
        • P(h);P_SPINP(h),XR(F)
    • Try
      • Q(J);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::S(C),XP(d)
      • Refutation
        • B(k);XQ(J)
  • Actual
    • B(G);XP(e)
    • Threat
      • QAB1(J),XP(j)
    • Vars
      • Q(i);N_GUARD,P_SPINQ(i),XP(H)::S(C),XP(d)
      • R(a);N_GUARD,P_SPINR(a),XP(E)::R(A)+B(G)
      • R(b);N_GUARD,P_SPINR(b),XP(E)::R(A)+B(G),XR(a)
      • S(c);N_GUARD::R1(F),XS(c)
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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).