MESON Chess Problem Database

Problem Display
PID: 95621 (4N3/3R1P1n/5Bp1/QKP2krp/5Pb1/2pR1p1n/p3N3/8 w - - 0 1)

Ahlheim, Karl-Heinz

3rd Prize, L'Italia Scacchistica, 1961

4N3/3R1P1n/5Bp1/QKP2krp/5Pb1/2pR1p1n/p3N3/8

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3+?
      • 1...Ke6
        • 2.R3d6#
        • 2.Re7#
        • 2.Qb6#
        • 2.Qa6#
      • 1...Kxf4!
    • 1.Sg7+?
      • 1...Ke4
        • 2.R7d4#
        • 2.Qb4#
        • 2.Qa4#
      • 1...Kxf6!
    • 1.Re3?
      • threat
        • 2.Re5#
        • 2.Rd5#
      • 1...Sxf4
        • 2.Sg3#
        • 2.Sd4#
        • 2.Re5#
      • 1...Sxf6
        • 2.Sd6#
        • 2.Sg7#
        • 2.Re5#
      • 1...fxe2!
    • 1.R3d5+?
      • 1...Ke6
        • 2.Sd4#
        • 2.Qb6#
        • 2.Qa6#
      • 1...Ke4!
    • 1.R7d5+?
      • 1...Ke4
        • 2.Sd6#
        • 2.Qb4#
        • 2.Qa4#
      • 1...Ke6!
    • 1.Re7?
      • threat
        • 2.Rd5#
        • 2.Re5#
      • 1...Sxf4
        • 2.Sg3#
        • 2.Sd4#
        • 2.Re5#
      • 1...Sxf6
        • 2.Sd6#
        • 2.Sg7#
        • 2.Re5#
      • 1...fxe2!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Sg3#
      • 1...Ke6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • K(f);P-FLIGHT,P_PINP(F),XP(C)
    • Try
      • S(J);CHECK
      • Refutation
        • K(f);P-FLIGHT,P_PINP(F),XB(G)
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);XS(A)
    • Try
      • R(B);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(H);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);XS(A)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • K(f);P_PINP(F),S_FLIGHT::S(A)
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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).