MESON Chess Problem Database

Problem Display
PID: 21816 (6nB/R7/RK2k3/1pQ1pp2/p3rp2/3b2PB/3qp3/6b1 w - - 0 1)

Ellerman, Arnoldo

4th Prize, Good Companions (January), 1921

6nB/R7/RK2k3/1pQ1pp2/p3rp2/3b2PB/3qp3/6b1

#2

7 + 12

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Ka5#
    • 1...Qe3
      • 2.Ka5#
    • 1...Qa5+
      • 2.Kxa5#
    • 1...Qd1
      • 2.Ka5#
    • 1...Qa2
      • 2.Ka5#
    • 1...Qb2
      • 2.Ka5#
    • 1...Qc2
      • 2.Ka5#
    • 1...Re3
      • 2.Qc6#
    • 1...Rb4
      • 2.Ka5#
    • 1...Rc4
      • 2.Kxb5#
    • 1...Rd4
      • 2.Qxe5#
    • 1...Bh2
      • 2.Qc6#
    • 1...Bxc5+
      • 2.Kxc5#
    • 1...Sf6
      • 2.Re7#
    • 1...Sh6
      • 2.Re7#
    • 1...Se7
      • 2.Rxe7#
  • Keys
    • 1.g4!
      • threat
        • 2.gxf5#
      • 1...Qa5+
        • 2.Kxa5#
      • 1...Bxc5+
        • 2.Kxc5#
      • 1...fxg4
        • 2.Bxg4#
      • 1...Se7
        • 2.Rxe7#
      • 1...Re3
        • 2.Qc6#
      • 1...Rb4
        • 2.Ka5#
      • 1...Rc4
        • 2.Kxb5#
      • 1...Rd4
        • 2.Qxe5#
      • 1...Sh6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(b);::R(D)+K(E)
    • Q(b);CHECK::R(D)+K(E),XQ(b)
    • R(f);N_PINQ(C)::QAR2(C)
    • R(f);::R(D)+K(E)
    • R(f);::R(D)+K(E),XP(h)
    • R(f);N_PINQ(C)::QAR1(C),XP(i)
    • B(a);N_PINQ(C)::QAR2(C)
    • B(a);CHECK,XQ(C)::R(D)+K(E),XB(a)
    • S(l);N_GUARD::R1(F)
    • S(l);N_GUARD::R1(F),XS(l)
  • Actual
    • P(A);N_PINP(j)
    • Threat
      • P(A),XP(j)
    • Vars
      • Q(b);CHECK::R(D)+K(E),XQ(b)
      • B(a);CHECK,XQ(C)::R(D)+K(E),XB(a)
      • P(j);OGATE,P_SPINP(j),XP(A)::B(B),XP(j)
      • S(l);N_GUARD::R1(F),XS(l)
      • R(f);N_PINQ(C)::QAR2(C)
      • R(f);::R(D)+K(E)
      • R(f);::R(D)+K(E),XP(h)
      • R(f);N_PINQ(C)::QAR1(C),XP(i)
      • S(l);N_GUARD::R1(F)
HTML5 logo

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).