MESON Chess Problem Database

Problem Display
PID: 21359 (2rRR3/7b/3PN3/N3k1P1/K2n1r2/1p3B2/3PP1nB/1Q6 w - - 0 1)

White, Alain Campbell

2nd Prize, Good Companions (May), 1918

2rRR3/7b/3PN3/N3k1P1/K2n1r2/1p3B2/3PP1nB/1Q6

#2

12 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4+
      • 2.Sxc4#
    • 1...Rb8
      • 2.Sc4#
    • 1...Rxd8
      • 2.Sc4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bg8
      • 2.Qe4#
    • 1...Se1
      • 2.Bxf4#
    • 1...Se3
      • 2.Bxf4#
    • 1...Sh4
      • 2.Bxf4#
    • 1...Sf5+
      • 2.Qe4#
    • 1...Sc6+
      • 2.Sc4#
  • Keys
    • 1.e3!
      • threat
        • 2.Sxd4#
        • 2.exd4#
      • 1...Rc4+
        • 2.Sxc4#
      • 1...Sc2+
        • 2.Sd4#
      • 1...Se2+
        • 2.Sd4#
        • 2.Sxf4#
      • 1...Sxf3+
        • 2.Sxf4#
      • 1...Sb5+
        • 2.Sd4#
        • 2.Sxf4#
      • 1...Sf5+
        • 2.Qe4#
      • 1...Sc6+
        • 2.Sc4#
      • 1...Sxe6+
        • 2.d4#
      • 1...Rxd8
        • 2.Sc4#
      • 1...Bxb1
        • 2.Sxd4#
      • 1...Sxe3
        • 2.Bxf4#
      • 1...Rc2
        • 2.Sxd4#
      • 1...Bc2
        • 2.Sxd4#
      • 1...Bd3
        • 2.Sxd4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Rc7
        • 2.exd4#
      • 1...Bf5
        • 2.exd4#
      • 1...Bg6
        • 2.exd4#
      • 1...Bg8
        • 2.Qe4#
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 4
  • Sets
    • R(g);CHECK,N_GUARD::S(G),XR(g)
    • R(g);N_GUARD::S(G)
    • R(g);N_GUARD,XR(K)::S(G)
    • B(f);N_GUARD::QAR1(A),XB(f)
    • B(f);N_GUARD::QAR1(A)
    • S(a);N_GUARD::B(D),XR(d)
    • S(c);CHECK,S_CUTB(f)::QAR1(A)
    • S(c);CHECK,S_CUTR(g)::S(G)
  • Actual
    • P(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(g);CHECK,N_GUARD::S(G),XR(g)
      • S(c);CHECK::R(L)+S(J)
      • S(c);CHECK,N_GUARD,XB(E)::R(L)+S(J),XR(d)
      • S(c);CHECK,S_CUTB(f)::QAR1(A)
      • S(c);CHECK,S_CUTR(g)::S(G)
      • S(c);CHECK,OGATE,P_SPINS(c),XS(J)::P(B)
      • R(g);N_GUARD,XR(K)::S(G)
      • B(f);XQ(A)::R(L)+S(J),XS(c)
      • S(a);N_GUARD,XP(C)::B(D),XR(d)
      • R(g);::R(L)+S(J),XS(c)
      • B(f);::R(L)+S(J),XS(c)
      • B(f);N_GUARD::QAR1(A),XB(f)
      • R(g);::P(C),XS(c)
      • B(f);::P(C),XS(c)
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