MESON Chess Problem Database

Problem Display
PID: 137207 (2K5/3p4/3P4/1B1kP1N1/1B1n1P2/2Q5/N2n4/2rR2b1 w - - 0 1)

Ellerman, Arnoldo

Good Companions, 1918

2K5/3p4/3P4/1B1kP1N1/1B1n1P2/2Q5/N2n4/2rR2b1

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc5#
    • 1...Rb1
      • 2.Qc5#
    • 1...Rxd1
      • 2.Qc5#
    • 1...Rxc3+
      • 2.Sxc3#
    • 1...Sc4
      • 2.Qf3#
    • 1...Sc2
      • 2.Qc4#
    • 1...Sc6
      • 2.Bc4#
  • Tries
    • 1.Sxc1?
      • threat
        • 2.Qc5#
      • 1...S2b3
        • 2.Qxb3#
        • 2.Qf3#
        • 2.Qc4#
      • 1...Sc4
        • 2.Qf3#
        • 2.Qxc4#
      • 1...Se4
        • 2.Qb3#
        • 2.Qc4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Se2
        • 2.Qc4#
      • 1...S4b3
        • 2.Qc4#
      • 1...S4f3
        • 2.Qc4#
      • 1...Sf5
        • 2.Qc4#
      • 1...Sc6
        • 2.Bc4#
        • 2.Qc4#
      • 1...Se6
        • 2.Qc4#
      • 1...Sxb5!
    • 1.Bc4+?
      • 1...Sxc4
        • 2.Qf3#
      • 1...Kc6!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Sb4#
      • 1...Rxc3+
        • 2.Sxc3#
      • 1...Rb1
        • 2.Qc5#
      • 1...Sc4
        • 2.Qf3#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sc6
        • 2.Bc4#

FEATURES

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