MESON Chess Problem Database

Problem Display
PID: 89992 (N1R5/8/2Nk4/5Kp1/8/2p2P2/B5Qp/4b3 w - - 0 1)

Pachl, Franz

Die Schwalbe, 1978

N1R5/8/2Nk4/5Kp1/8/2p2P2/B5Qp/4b3

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qxh2+?
      • 1...Kc5
        • 2.Qe5#
      • 1...Kd7
        • 2.Sb6#
        • 2.Be6#
        • 2.Qc7#
      • 1...Bg3!
    • 1.Qg3+?
      • 1...Kc5
        • 2.Qe5#
      • 1...Kd7
        • 2.Sb6#
        • 2.Be6#
        • 2.Qc7#
      • 1...Bxg3!
    • 1.Qg4?
      • threat
        • 2.Qd4#
      • 1...Kc5
        • 2.Qb4#
      • 1...Kd7
        • 2.Ke5#
      • 1...Bf2!
    • 1.Qxg5?
      • threat
        • 2.Qe7#
      • 1...Kc5
        • 2.Ke6#
      • 1...Kd7
        • 2.Qd8#
      • 1...Bh4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe7#
      • 1...Kc5
        • 2.Qe5#
      • 1...Kd7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • K(e);S_FLIGHT::QAR2(B)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR2(B)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
        • K(e);P-FLIGHT::QAB(B)+K(D)
      • Refutation
        • B(a);
    • Try
      • Q(B);XP(d)
      • Threat
        • QAB1(B)
      • Vars
        • K(e);S_FLIGHT::QAR(B)+K(D)
        • K(e);P-FLIGHT::QAR1(B)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(e);S_FLIGHT::QAR2(B)
      • K(e);P-FLIGHT::QAB1(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).