MESON Chess Problem Database

Problem Display
PID: 6102 (b3N1B1/8/7P/4k1BR/4P1Pp/pN6/pqPK2n1/Q3R3 w - - 0 1)

Schiffmann, Israel Abraham

Comm., Brisbane Courier, 1927

b3N1B1/8/7P/4k1BR/4P1Pp/pN6/pqPK2n1/Q3R3

#2

12 + 7

20 De Problemist 1928
1397 Faszinierendes Schachproblem 1963

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3+
      • 2.Qxc3#
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Sf4
      • 2.Bf6#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Be3#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Se3
        • 2.Bxe3#
      • 1...Sf4
        • 2.Bf6#
      • 1...Bxd5!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Be3#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qd4+
        • 2.Sd3#
      • 1...Kd4
        • 2.Bf6#
      • 1...Bxe4
        • 2.Rxe4#
      • 1...Se3
        • 2.Bxe3#
      • 1...Sf4
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,N_PINP(C),OGATE::QAB(A),XQ(b)
    • Q(b);CHECK,N_PINP(C),OGATE::QAB1(A),XQ(b)
    • S(c);SBLOCK::R(I)+B(H),DCHECK
  • Tries
    • Try
      • B(L);
      • Threat
        • R(I)+B(H)
      • Vars
        • Q(b);CHECK,N_PINP(C),OGATE::QAB(A),XQ(b)
        • Q(b);CHECK,N_PINP(C),OGATE::QAB1(A),XQ(b)
        • S(c);::R(I)+B(H),XS(c)
        • S(c);SBLOCK::R(I)+B(H),DCHECK
      • Refutation
        • B(g);XB(L)
  • Actual
    • S(E);
    • Threat
      • R(I)+B(H)
    • Vars
      • Q(b);CHECK,N_PINP(C),OGATE::QAB(A),XQ(b)
      • Q(b);CHECK,N_PINP(C)::S(E)
      • K(f);S_FLIGHT::B(H)
      • B(g);OGATE,P_SPINB(g),XP(F)::R1(B),XB(g)
      • S(c);::R(I)+B(H),XS(c)
      • S(c);SBLOCK::R(I)+B(H),DCHECK
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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).