MESON Chess Problem Database

Problem Display
PID: 89993 (8/2R5/1R2p1K1/3kp1p1/2pr1bB1/3pp3/1Q3p2/8 w - - 0 1)

Pachl, Franz

Die Schwalbe, 1983

8/2R5/1R2p1K1/3kp1p1/2pr1bB1/3pp3/1Q3p2/8

#2

5 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Bxe6#
    • 1...e4
      • 2.Qb5#
  • Tries
    • 1.Bf3+?
      • 1...e4
        • 2.Qb5#
      • 1...Re4!
    • 1.Bf5?
      • threat
        • 2.Qb5#
      • 1...Re4
        • 2.Bxe6#
      • 1...exf5!
    • 1.Ra6?
      • threat
        • 2.Qb7#
      • 1...Re4
        • 2.Bxe6#
      • 1...e4
        • 2.Qb5#
      • 1...Ke4!
    • 1.Rc5+?
      • 1...Kxc5
        • 2.Qb5#
      • 1...Ke4!
    • 1.Rd7+?
      • 1...Kc5
        • 2.Qb4#
        • 2.Qb5#
      • 1...Ke4!
    • 1.Qa3?
      • threat
        • 2.Qa8#
      • 1...Re4
        • 2.Rd6#
        • 2.Rd7#
        • 2.Qc5#
        • 2.Qd6#
      • 1...e4
        • 2.Rb5#
        • 2.Rc5#
        • 2.Qc5#
        • 2.Qa5#
      • 1...Ke4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa8#
      • 1...Ke4
        • 2.Qh1#
      • 1...Re4
        • 2.Bxe6#
      • 1...e4
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::B(B),XP(j)
    • P(h);SBLOCK::QAR2(A)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(h);P_SPINP(h)::QAR2(A)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • B(B);
      • Threat
        • QAR2(A)
      • Vars
        • R(e);SBLOCK::B(B),XP(j)
      • Refutation
        • P(j);XB(B)
    • Try
      • R(C);
      • Threat
        • QAB(A)
      • Vars
        • R(e);SBLOCK::B(B),XP(j)
        • P(h);SBLOCK::QAR2(A)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(g);P-FLIGHT,XR(E)::QAR1(A)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(g);S_FLIGHT::QAB(A)
      • R(e);SBLOCK::B(B),XP(j)
      • P(h);SBLOCK::QAR(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).