MESON Chess Problem Database

Problem Display
PID: 44698 (1B6/4pb1B/3bppn1/5k2/5Np1/1N2p3/K7/5R1Q w - - 0 1)

Seidemann, Felix

Recomm., BCF 039. Ty., 1941-1942

1B6/4pb1B/3bppn1/5k2/5Np1/1N2p3/K7/5R1Q

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Sd3#
    • 1...Kg5
      • 2.Qh5#
    • 1...Ba3
      • 2.Sh3#
    • 1...Bb4
      • 2.Sh3#
    • 1...Bc5
      • 2.Sh3#
  • Tries
    • 1.Sd4+?
      • 1...Kg5
        • 2.Qh5#
      • 1...Ke5!
    • 1.Sh3+?
      • 1...Bf4
        • 2.Sd4#
        • 2.Rxf4#
      • 1...Ke5!
    • 1.Sxg6+?
      • 1...Kg5
        • 2.Qh4#
      • 1...Bf4!
    • 1.Bxg6+?
      • 1...Ke5
        • 2.Sd3#
        • 2.Qe4#
      • 1...Kg5
        • 2.Qh5#
      • 1...Bxg6!
    • 1.Qd5+?
      • 1...Be5
        • 2.Sh3#
        • 2.Sxe6#
      • 1...e5
        • 2.Sh3#
        • 2.Se6#
      • 1...exd5!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qh5#
      • 1...e5+
        • 2.Sfe6#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kg5
        • 2.Qh5#
      • 1...Bxc5
        • 2.Sh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(c);N_SPINS(g),P-FLIGHT,P_SPINB(d)::S(E)
    • K(c);N_SPINS(g),P-FLIGHT::QAR1(B)
    • B(d);N_GUARD::R(A)+S(E)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_SPINS(g),P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);N_SPINS(g),P-FLIGHT,P_SPINB(d)
    • Try
      • S(E);CHECK
      • Refutation
        • K(c);N_SPINS(g),P-FLIGHT,P_SPINB(d)
    • Try
      • S(E);CHECK,XS(g)
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • B(F);CHECK,XS(g)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
      • Refutation
        • B(i);XB(F)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(e);XQ(B)
  • Actual
    • S(D);
    • Threat
      • QAR2(B)
    • Vars
      • P(e);CHECK,SBLOCK,S_CUTB(d)::R(A)+S(E)
      • K(c);N_SPINS(g),P-FLIGHT,P_SPINB(d)::QAR1(B)
      • K(c);N_SPINS(g),P-FLIGHT::QAR1(B)
      • B(d);N_GUARD,XS(D)::R(A)+S(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).