MESON Chess Problem Database

Problem Display
PID: 71888 (6B1/p2KP3/Q1pBR2b/8/NN3p2/1k1p3R/pPp5/2n2nqb w - - 0 1)

Pries, Albert

Die Schwalbe, 1935

6B1/p2KP3/Q1pBR2b/8/NN3p2/1k1p3R/pPp5/2n2nqb

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Re4#
    • 1...Qh2
      • 2.Re4#
    • 1...Qe3
      • 2.Re4#
    • 1...Qb6
      • 2.Re4#
    • 1...Bg2
      • 2.Re4#
    • 1...Bg5
      • 2.Re4#
    • 1...Bg7
      • 2.Re4#
    • 1...Sg3
      • 2.Re4#
    • 1...f3
      • 2.Rg6#
  • Tries
    • 1.Qxd3+?
      • 1...Kxa4
        • 2.Qa6#
      • 1...Sxd3!
    • 1.Qc4+?
      • 1...Kxa4
        • 2.Sxc6#
      • 1...Kxc4!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Sxc1#
      • 1...Sxd3
        • 2.Rxd3#
      • 1...Qc5
        • 2.Saxc5#
      • 1...Se2
        • 2.Sc1#
      • 1...Se3
        • 2.Sac5#
      • 1...Sg3
        • 2.Re4#
      • 1...f3
        • 2.Rg6#
      • 1...c5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::B(J)+R(G)
    • Q(c);N_GUARD,N_SPINP(h)::B(J)+R(G)
    • B(d);S_CUTQ(c)::B(J)+R(G)
    • B(k);S_CUTQ(c)::B(J)+R(G)
    • S(b);N_SPINP(h),S_CUTQ(c)::B(J)+R(G)
    • P(i);N_SPINP(h),S_CUTB(d)::B(J)+R(G)
  • Tries
    • Try
      • Q(E);CHECK,XP(h)
      • Vars
        • K(g);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • S(a);P_SPINS(a),XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(g);N_SPINP(h),S_FLIGHT,XS(C)::QAR(E)+S(D),XP(j)
      • Refutation
        • K(g);N_SPINP(h),S_FLIGHT,XQ(E)
  • Actual
    • S(D);XP(h)
    • Threat
      • R(B)+S(D),DCHECK,XS(a)
    • Vars
      • S(a);OGATE,P_SPINS(a),XS(D)::R(B),XS(a)
      • Q(c);N_GUARD::S(C),XQ(c)
      • S(a);::R(B)+S(D),DCHECK
      • S(b);S_CUTQ(c)::S(C)
      • S(b);S_CUTQ(c)::B(J)+R(G)
      • P(i);S_CUTB(d)::B(J)+R(G)
      • P(j);N_GUARD::QAR2(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).