MESON Chess Problem Database

Problem Display
PID: 89817 (8/B7/Bq4p1/4p1N1/3rp1PK/p7/Q1P2kN1/4R3 w - - 0 1)

Giese, Ernst

Die Schwalbe, 1928

8/B7/Bq4p1/4p1N1/3rp1PK/p7/Q1P2kN1/4R3

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.c3#
    • 1...Qc7
      • 2.c3#
      • 2.c4#
    • 1...Qd8
      • 2.c3#
      • 2.c4#
    • 1...Qb3
      • 2.cxb3#
    • 1...Qxa6
      • 2.c4#
    • 1...Qc6
      • 2.c3#
      • 2.c4#
    • 1...Qd6
      • 2.c3#
      • 2.c4#
    • 1...Qe6
      • 2.c4#
    • 1...Qf6
      • 2.c3#
      • 2.c4#
    • 1...Rd3
      • 2.cxd3#
    • 1...Ra4
      • 2.c3#
      • 2.c4#
    • 1...Rc4
      • 2.c3#
  • Tries
    • 1.c3+?
      • 1...Rd2
        • 2.Qxd2#
      • 1...Qb2!
    • 1.c4+?
      • 1...Rd2
        • 2.Qxd2#
      • 1...Qb2!
  • Keys
    • 1.Kh3!
      • threat
        • 2.Rf1#
      • 1...Qb3+
        • 2.cxb3#
      • 1...Rd3+
        • 2.cxd3#
      • 1...Qxa6
        • 2.c4#
      • 1...Qb1
        • 2.Qf7#
      • 1...Qb5
        • 2.Qf7#
      • 1...Rd1
        • 2.Qf7#
      • 1...Rc4
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(f);N_GUARD,P_SPINR(c)::QAR(B)+P(C)
    • Q(f);OGATE,P_SPINR(c)::QAR(B)+P(C),XQ(f)
    • Q(f);N_GUARD,P_SPINR(c),XB(H)::QAR(B)+P(C)
    • R(c);OGATE,P_SPINQ(f)::QAR(B)+P(C),XR(c)
    • R(c);N_GUARD,P_SPINQ(f)::QAR(B)+P(C)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINQ(f),P_SPINR(c)::QAR2(B),XR(c)
      • Refutation
        • Q(f);P_SPINQ(f),P_SPINR(c)
    • Try
      • P(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINQ(f),P_SPINR(c)::QAR2(B),XR(c)
      • Refutation
        • Q(f);P_SPINQ(f),P_SPINR(c)
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • R1(A)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINR(c)::QAR(B)+P(C),XQ(f)
      • R(c);CHECK,OGATE,P_SPINQ(f)::QAR(B)+P(C),XR(c)
      • Q(f);N_GUARD,P_SPINR(c),XB(H)::QAR(B)+P(C)
      • Q(f);N_GUARD,P_SPINR(c)::QAR(B)
      • R(c);P_SPINQ(f)::QAR(B)
      • R(c);N_GUARD,P_SPINQ(f)::QAR(B)+P(C)
HTML5 logo

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).