MESON Chess Problem Database

Problem Display
PID: 151539 (5K2/5P2/N3p2p/4k2P/4B3/3PQP2/8/8 w - - 0 1)

Ahlheim, Karl-Heinz

Die Schwalbe, 1962

5K2/5P2/N3p2p/4k2P/4B3/3PQP2/8/8

#2

8 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd4#
    • 1...Kf6
      • 2.Qf4#
  • Tries
    • 1.Ke8?
      • 1...Kd6
        • 2.Qd4#
        • 2.Qc5#
      • 1...Kf6!
    • 1.Sb4?
      • 1...Kf6
        • 2.Qf4#
      • 1...Kd6!
    • 1.Sc5?
      • 1...Kf6
        • 2.Sd7#
        • 2.Qf4#
      • 1...Kd6!
    • 1.Sc7?
      • 1...Kf6
        • 2.Qf4#
      • 1...Kd6!
    • 1.Sb8?
      • 1...Kf6
        • 2.Sd7#
        • 2.Qf4#
      • 1...Kd6!
    • 1.Bd5+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...Kd6
        • 2.Qxe6#
      • 1...Kf6
        • 2.Qf4#
      • 1...Kf5!
    • 1.Bc6+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qf4#
      • 1...Kf5!
    • 1.Bg6+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kf6
        • 2.Qf4#
      • 1...Kd6!
    • 1.Bb7+?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6
        • 2.Qf4#
      • 1...Kf5!
    • 1.Bh7+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kf6
        • 2.Qf4#
      • 1...Kd6!
    • 1.Ba8+?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6
        • 2.Qf4#
      • 1...Kf5!
    • 1.Qg1?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6
        • 2.Qg7#
      • 1...Kf4!
    • 1.d4+?
      • 1...Kf6
        • 2.Qf4#
        • 2.Qxh6#
      • 1...Kd6!
    • 1.f4+?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6!
  • Keys
    • 1.Qc1!
      • 1...Kd4
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc7#
      • 1...Kf6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(D)::QAR1(B)
        • K(a);OGATE,S_FLIGHT::QAR1(B),XP(b)
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::QAR2(B)
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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).