MESON Chess Problem Database

Problem Display
PID: 132041 (2Q1br1b/1p2p3/1p2p3/1RPknp1R/4p3/1PPpP3/5N1B/K7 w - - 0 1)

Casa, Alex

Die Schwalbe, 1952

2Q1br1b/1p2p3/1p2p3/1RPknp1R/4p3/1PPpP3/5N1B/K7

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.c6#
    • 1...Sc4
      • 2.c6#
    • 1...Sg4
      • 2.c6#
    • 1...Sc6
      • 2.cxb6#
    • 1...Sg6
      • 2.c6#
    • 1...Sd7
      • 2.Qxb7#
    • 1...Sf7
      • 2.c6#
    • 1...f4
      • 2.c4#
    • 1...bxc5
      • 2.Qxc5#
  • Tries
    • 1.Qxb7+?
      • 1...Sc6
        • 2.cxb6#
      • 1...Bc6!
    • 1.cxb6+?
      • 1...Kd6
        • 2.Qc7#
      • 1...Bxb5!
  • Keys
    • 1.Sh3!
      • threat
        • 2.Sf4#
      • 1...bxc5
        • 2.Qxc5#
      • 1...Sf3
        • 2.c6#
      • 1...Sc4
        • 2.c6#
      • 1...Sg4
        • 2.c6#
      • 1...Sc6
        • 2.cxb6#
      • 1...Sg6
        • 2.c6#
      • 1...Sd7
        • 2.Qxb7#
      • 1...Sf7
        • 2.c6#
      • 1...f4
        • 2.c4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(d);P_PINP(E),P_SPINP(e)::R(G)+P(H)
    • S(d);P_PINP(E),P_SPINP(e),S_CUTB(j)::R(G)+P(H),XP(f)
    • S(d);N_GUARD,P_PINP(E),P_SPINP(e),S_CUTB(j)::QAB(J),XP(h)
    • P(e);P_SPINS(d)::P(E)
    • P(f);OGATE,P_SPINP(f),XP(H)::QAR1(J),XP(f)
  • Tries
    • Try
      • Q(J);CHECK,XP(h)
      • Vars
        • S(d);P_PINP(E),P_SPINP(e),P_SPINS(d)::R(G)+P(H),XP(f)
      • Refutation
        • B(j);P_SPINB(j)
    • Try
      • P(H);CHECK,XP(f)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(d)::QAB1(J)
      • Refutation
        • B(j);XR(G)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • P(f);OGATE,P_SPINP(f),XP(H)::QAR1(J),XP(f)
      • S(d);P_PINP(E),P_SPINP(e)::R(G)+P(H)
      • S(d);P_PINP(E),P_SPINP(e),S_CUTB(j)::R(G)+P(H),XP(f)
      • S(d);N_GUARD,P_PINP(E),P_SPINP(e),S_CUTB(j)::QAB(J),XP(h)
      • P(e);P_SPINS(d)::P(E)
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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).