MESON Chess Problem Database

Problem Display
PID: 90352 (3B4/4P3/3P2b1/pkNQ4/1rp4K/q5p1/PRPPP3/5B2 w - - 0 1)

Stocchi, Ottavio

Die Schwalbe, 1933

3B4/4P3/3P2b1/pkNQ4/1rp4K/q5p1/PRPPP3/5B2

#2

12 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.a4#
    • 1...Qd3
      • 2.a4#
    • 1...Qe3
      • 2.a4#
    • 1...Qf3
      • 2.a4#
    • 1...Bxc2
      • 2.e8Q#
      • 2.e8B#
    • 1...Bd3
      • 2.e8Q#
      • 2.e8B#
    • 1...Be4
      • 2.e8Q#
      • 2.e8B#
    • 1...Bh7
      • 2.e8Q#
      • 2.e8B#
    • 1...c3+
      • 2.e4#
  • Tries
    • 1.Sb3+?
      • 1...Ka4
        • 2.Qxa5#
      • 1...Ka6!
    • 1.Sd3+?
      • 1...Ka4
        • 2.Qxa5#
      • 1...Ka6!
    • 1.Sa4+?
      • 1...Kxa4
        • 2.Qxa5#
      • 1...Ka6!
    • 1.Se4+?
      • 1...Ka4
        • 2.Qxa5#
      • 1...Ka6!
    • 1.Sa6+?
      • 1...Ka4
        • 2.Qxa5#
      • 1...Kxa6!
    • 1.Se6+?
      • 1...Ka4
        • 2.Qxa5#
      • 1...Ka6!
    • 1.Sb7+?
      • 1...Ka4
        • 2.Qxa5#
      • 1...Ka6!
    • 1.Sd7+?
      • 1...Ka4
        • 2.Qxa5#
      • 1...Ka6!
  • Keys
    • 1.d4!
      • threat
        • 2.Qb7#
      • 1...cxd4 ep+
        • 2.c4#
      • 1...Qf3
        • 2.a4#
      • 1...Be4
        • 2.e8Q#
        • 2.e8B#
      • 1...c3
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);OGATE::P(B)
    • B(g);N_GUARD,XP(D)::P=Q
    • B(g);N_GUARD::P=Q
    • P(d);CHECK::B(A)+P(F)
  • Tries
    • Try
      • S(H);CHECK,N_PINR(c)
      • Vars
        • K(f);OGATE,S_FLIGHT::QAR1(I),XP(e)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINR(c),OGATE,S_FLIGHT::QAR1(I),XP(e)
      • Refutation
        • K(f);N_SPINR(c),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINR(c),OGATE,S_FLIGHT,XS(H)::QAR1(I),XP(e)
      • Refutation
        • K(f);N_SPINR(c),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINR(c),OGATE,S_FLIGHT::QAR1(I),XP(e)
      • Refutation
        • K(f);N_SPINR(c),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINR(c),OGATE,S_FLIGHT::QAR1(I),XP(e)
      • Refutation
        • K(f);N_SPINR(c),S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINR(c),OGATE,S_FLIGHT::QAR1(I),XP(e)
      • Refutation
        • K(f);N_SPINR(c),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINR(c),OGATE,S_FLIGHT::QAR1(I),XP(e)
      • Refutation
        • K(f);N_SPINR(c),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINR(c),OGATE,S_FLIGHT::QAR1(I),XP(e)
      • Refutation
        • K(f);N_SPINR(c),S_FLIGHT
  • Actual
    • P(E);
    • Threat
      • QAR2(I)
    • Vars
      • P(d);CHECK,EP,OGATE,XP(E)::P(D)
      • Q(a);OGATE::P(B)
      • B(g);N_GUARD::P=Q
      • P(d);P_PINP(E)::B(A)+P(F)
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).