MESON Chess Problem Database

Problem Display
PID: 64026 (3Q1NB1/q2p4/nRpk4/1P5p/r1PKP2r/p3N2n/3R4/6b1 w - - 0 1)

Bettmann, Henry Wald

3rd HM., Good Companions (November), 1917

3Q1NB1/q2p4/nRpk4/1P5p/r1PKP2r/p3N2n/3R4/6b1

#2

10 + 11

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qb8
      • 2.Rxc6#
      • 2.Qxd7#
    • 1...Qc7
      • 2.Qf6#
    • 1...Qa8
      • 2.Qxd7#
    • 1...Bh2
      • 2.Sf5#
    • 1...Sf2
      • 2.Sf5#
    • 1...Sf4
      • 2.e5#
    • 1...Sb4
      • 2.c5#
    • 1...Sc5
      • 2.Rxc6#
    • 1...Sc7
      • 2.Qxd7#
  • Keys
    • 1.Sxd7!
      • threat
        • 2.Kc3#
      • 1...Qxb6+
        • 2.Sxb6#
      • 1...Rxc4+
        • 2.Kxc4#
      • 1...Rxe4+
        • 2.Kxe4#
      • 1...Bxe3+
        • 2.Kxe3#
      • 1...Qxd7
        • 2.Rxc6#
      • 1...Sf2
        • 2.Sf5#
      • 1...Sf4
        • 2.e5#
      • 1...Sb4
        • 2.c5#
      • 1...Sc5
        • 2.Rxc6#
      • 1...Sc7
        • 2.Sc5#
        • 2.Se5#
        • 2.Sf6#
        • 2.Sb8#
        • 2.Sf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(j);N_PINR(G),SBLOCK::QAR2(H)
    • Q(j);N_GUARD,N_PINR(G)::QAR1(H),XP(k)
    • B(a);N_PINS(B)::S(B)
    • S(c);N_PINS(B)::S(B)
    • S(c);OGATE::P(E)
    • S(g);N_PINP(C),P_PINP(E)::P(C)
    • S(g);N_PINR(G)::R1(G),XP(h)
    • S(g);S_CUTQ(j)::QAR1(H),XP(k)
  • Actual
    • S(I);XP(k)
    • Threat
      • R(A)+K(D)
    • Vars
      • Q(j);CHECK,N_SPINP(h),XR(G)::QAR(H)+S(I),XQ(j)
      • R(d);CHECK,P_PINP(E),XP(C)::R(A)+K(D),XR(d)
      • R(e);CHECK,XP(E)::R(A)+K(D),XR(e)
      • B(a);CHECK,XS(B)::R(A)+K(D),XB(a)
      • Q(j);N_PINR(G),P_SPINQ(j),XS(I)::R1(G),XP(h)
      • S(c);N_PINS(B)::S(B)
      • S(c);OGATE::P(E)
      • S(g);N_PINP(C),P_PINP(E)::P(C)
      • S(g);N_PINR(G)::R1(G),XP(h)
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).