MESON Chess Problem Database

Problem Display
PID: 146615 (2K5/3p4/3P4/1B1kP1N1/1B1n1P2/2Qb4/N4b2/n1rR1q2 w - - 0 1)

Ellerman, Arnoldo

2nd HM., Good Companions (February), 1918

2K5/3p4/3P4/1B1kP1N1/1B1n1P2/2Qb4/N4b2/n1rR1q2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qc5#
    • 1...Rxd1
      • 2.Qc5#
    • 1...Rxc3+
      • 2.Sxc3#
    • 1...Bc2
      • 2.Qc5#
    • 1...Bc4
      • 2.Qf3#
    • 1...Sac2
      • 2.Qc5#
    • 1...Sdc2
      • 2.Qc4#
    • 1...Sc6
      • 2.Bc4#
  • Tries
    • 1.Bc4+?
      • 1...Bxc4
        • 2.Qf3#
      • 1...Kc6!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Sb4#
      • 1...Rxc3+
        • 2.Sxc3#
      • 1...Rb1
        • 2.Qc5#
      • 1...Bc4
        • 2.Qf3#
      • 1...Sac2
        • 2.Qc5#
      • 1...Sdc2
        • 2.Qc4#
      • 1...Sc6
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD,N_PINQ(C)::QAR1(C)
    • R(b);N_GUARD,N_PINQ(C),XR(A)::QAR1(C)
    • R(b);CHECK,XQ(C)::S(B),XR(b)
    • B(e);N_PINQ(C),P_SPINS(f),S_CUTR(b)::QAR1(C)
    • B(e);N_PINQ(C),P_SPINS(f)::QAB(C)
    • S(a);N_PINQ(C),S_CUTR(b)::QAR1(C)
    • S(f);N_PINQ(C),P_SPINB(e),S_CUTR(b)::QAB1(C)
    • S(f);N_PINQ(C),P_SPINB(e),SBLOCK::B(F)
  • Tries
    • Try
      • B(F);CHECK,N_SPINQ(C)
      • Vars
        • B(e);OGATE,P_SPINS(f),SBLOCK,XB(F)::QAB(C)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • B(D);
    • Threat
      • S(B)
    • Vars
      • R(b);CHECK,XQ(C)::S(B),XR(b)
      • R(b);N_GUARD,N_PINQ(C)::QAR1(C)
      • B(e);N_PINQ(C),P_SPINS(f)::QAB(C)
      • S(a);N_PINQ(C),S_CUTR(b)::QAR1(C)
      • S(f);N_PINQ(C),P_SPINB(e),S_CUTR(b)::QAB1(C)
      • S(f);N_PINQ(C),P_SPINB(e),SBLOCK::B(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).