MESON Chess Problem Database

Problem Display
PID: 182259 (R7/3p4/3P4/nP6/1kP3R1/8/2K5/2B4Q w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1906

R7/3p4/3P4/nP6/1kP3R1/8/2K5/2B4Q

#2

8 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Ba3#
    • 1...Sc6
      • 2.Ba3#
    • 1...Sb7
      • 2.Ba3#
  • Tries
    • 1.Bd2+?
      • 1...Ka3
        • 2.Rxa5#
        • 2.Qa1#
      • 1...Ka4
        • 2.Rxa5#
        • 2.Qa1#
      • 1...Kc5!
    • 1.Qd5?
      • 1...Sxc4
        • 2.Bd2#
        • 2.Ba3#
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...Sb3
        • 2.Ba3#
      • 1...Sc6
        • 2.Bd2#
        • 2.Ba3#
      • 1...Sb7
        • 2.Bd2#
        • 2.Ba3#
      • 1...Ka4!
    • 1.Qc6?
      • 1...Ka4
        • 2.c5#
      • 1...Sxc4
        • 2.Bd2#
        • 2.Ba3#
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...Sxc6
        • 2.Ba3#
      • 1...Sb3
        • 2.Ba3#
      • 1...Sb7
        • 2.Bd2#
        • 2.Ba3#
        • 2.c5#
      • 1...dxc6!
    • 1.Qe1+?
      • 1...Ka4
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...Kc5!
    • 1.Qf1?
      • 1...Ka4
        • 2.c5#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Sb3
        • 2.Ba3#
      • 1...Sc6
        • 2.Ba3#
      • 1...Sb7
        • 2.Ba3#
      • 1...Kc5!
    • 1.Qh5?
      • 1...Sxc4
        • 2.Bd2#
        • 2.Ba3#
      • 1...Sb3
        • 2.Ba3#
      • 1...Sc6
        • 2.Bd2#
        • 2.Ba3#
      • 1...Sb7
        • 2.Bd2#
        • 2.Ba3#
      • 1...Ka4!
  • Keys
    • 1.Qb7!
      • 1...Ka4
        • 2.c5#
      • 1...Kc5
        • 2.Ba3#
      • 1...Sxc4
        • 2.Ba3#
      • 1...Sxb7
        • 2.Ba3#
      • 1...Sb3
        • 2.Ba3#
      • 1...Sc6
        • 2.Ba3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(b);::B(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(b)
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::R(E)+P(D)
        • S(b);XQ(B)::B(A)
        • S(b);::B(A)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::R(E)+P(D)
        • S(b);OGATE,P_SPINS(b),XP(D)::QAR1(B),XS(b)
        • S(b);::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(b);::B(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(b)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT,P_SPINS(b)::R(E)+P(D)
      • K(a);S_FLIGHT::B(A)
      • S(b);P_SPINS(b),XP(D)::B(A)
      • S(b);XQ(B)::B(A)
      • S(b);::B(A)
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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).