MESON Chess Problem Database

Problem Display
PID: 159023 (7r/N4pp1/1bR3b1/2r1k1P1/4P1Pp/2P2Q1K/1B3N1P/1q2R3 w - - 0 1)

Albert, Imreh

Die Schwalbe, 1939

7r/N4pp1/1bR3b1/2r1k1P1/4P1Pp/2P2Q1K/1B3N1P/1q2R3

#2

12 + 9

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sd3#
    • 1...Qd3
      • 2.Sxd3#
    • 1...Qxe4
      • 2.c4#
    • 1...Qa1
      • 2.Sd3#
    • 1...Qc1
      • 2.Sd3#
    • 1...Qxe1
      • 2.Sd3#
    • 1...Qxb2
      • 2.Sd3#
    • 1...Bxe4
      • 2.Qf5#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bh5
      • 2.Qf5#
  • Keys
    • 1.Rf6!
      • threat
        • 2.Qf4#
      • 1...Qxe4
        • 2.c4#
      • 1...Rxc3
        • 2.Sc6#
      • 1...Bxe4
        • 2.Qf5#
      • 1...gxf6
        • 2.Qxf6#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Qc1
        • 2.Sd3#
      • 1...Bf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::S(C)
    • Q(a);N_GUARD,P_PINQ(F)::S(C),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(H)::B(B)+P(E)
    • Q(a);N_GUARD,XR(A)::S(C)
    • Q(a);N_GUARD,XB(B)::S(C)
    • B(f);N_GUARD,P_SPINB(f),XP(H)::QAR1(F)
    • B(f);N_GUARD,P_PINP(I)::QAR1(F),XB(f)
    • B(f);N_GUARD::QAR1(F)
  • Actual
    • R(K);
    • Threat
      • QAB1(F)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(H)::B(B)+P(E)
      • R(c);N_GUARD,P_PINQ(F),P_SPINR(c),XP(E)::S(L)
      • B(f);N_GUARD,P_SPINB(f),XP(H)::QAR1(F)
      • P(h);OGATE,XR(K)::QAB1(F),XP(h)
      • Q(a);N_GUARD,P_PINQ(F)::S(C),XQ(a)
      • Q(a);N_GUARD::S(C)
      • B(f);N_GUARD,P_PINP(I)::QAR1(F),XB(f)
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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).