MESON Chess Problem Database

Problem Display
PID: 150375 (8/1N6/8/2R2K1P/1p1k2P1/2nP1p2/1n3P2/B1Nb3Q w - - 0 1)

Ahlheim, Karl-Heinz

Galitzky MT, 0000

8/1N6/8/2R2K1P/1p1k2P1/2nP1p2/1n3P2/B1Nb3Q

#2

10 + 6

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Rc4#
  • Tries
    • 1.Qxf3?
      • threat
        • 2.Qe3#
      • 1...Sc4
        • 2.Rxc4#
        • 2.Rd5#
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qf4#
      • 1...Sd5
        • 2.Rc4#
        • 2.Qe4#
        • 2.Qxd5#
      • 1...Bxf3!
    • 1.Qe1?
      • threat
        • 2.Qe3#
        • 2.Qe5#
      • 1...Sxd3
        • 2.Qe3#
        • 2.Qe4#
      • 1...Sc4
        • 2.Qe4#
      • 1...Se2
        • 2.Qxb4#
      • 1...Se4
        • 2.Qxb4#
        • 2.Qe3#
        • 2.Qxe4#
      • 1...Sd5
        • 2.Rc4#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Be2!
    • 1.Qh4?
      • threat
        • 2.Qf6#
      • 1...Sxd3
        • 2.Qd8#
      • 1...Sc4
        • 2.g5#
      • 1...Sd5
        • 2.Rc4#
      • 1...Se4!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qe5#
      • 1...Sxd3
        • 2.Qd6#
      • 1...Sc4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(c);P_SPINS(b),SBLOCK::R1(G)
  • Tries
    • Try
      • Q(C);XP(d)
      • Threat
        • QAB1(C)
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);P_SPINS(c)::QAR1(C)
        • S(c);OGATE,P_SPINS(b)::QAR2(C),XP(e)
      • Refutation
        • B(a);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • S(b);P_SPINS(c),XP(E)::QAR(C)
        • S(b);P_SPINS(c)::QAR(C)+P(F)
        • S(c);P_SPINS(b),SBLOCK::R1(G)
      • Refutation
        • S(c);P_SPINS(b)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • S(b);P_SPINS(c),XP(E)::QAR2(C)
      • S(b);P_SPINS(c)::QAR2(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).