MESON Chess Problem Database

Problem Display
PID: 21368 (2R3bB/3PP2P/2B5/1P2n1pq/1Pk4r/P3p2r/1KN1P3/n2RN2Q w - - 0 1)

Ceriani, Luigi

Good Companions (October), 1918

2R3bB/3PP2P/2B5/1P2n1pq/1Pk4r/P3p2r/1KN1P3/n2RN2Q

#2

15 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh1
      • 2.Sxe3#
    • 1...Rh2
      • 2.Sxe3#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bxh7
      • 2.Qd5#
    • 1...Sd3+
      • 2.exd3#
    • 1...Sf3
      • 2.Sxe3#
    • 1...Sg4
      • 2.Rd4#
      • 2.Qe4#
    • 1...Sxc6
      • 2.Qxc6#
    • 1...Sg6
      • 2.hxg8Q#
      • 2.hxg8B#
    • 1...Sxd7
      • 2.Bxd7#
    • 1...Sf7
      • 2.Qd5#
    • 1...g4
      • 2.Rd4#
      • 2.Qe4#
  • Tries
    • 1.Be4+?
      • 1...Sc6
        • 2.Bd3#
      • 1...Kxb5!
    • 1.Bb7+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kxb5!
    • 1.Ba8+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kxb5!
    • 1.Rd3?
      • threat
        • 2.Rc3#
      • 1...Sxd3+
        • 2.exd3#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sxc2!
    • 1.a4?
      • threat
        • 2.Bd5#
      • 1...Sd3+
        • 2.exd3#
      • 1...Sxc6
        • 2.Rxc6#
        • 2.Qxc6#
      • 1...Bd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Sxc2!
    • 1.hxg8Q+?
      • 1...Sf7
        • 2.Qd5#
      • 1...Qf7!
    • 1.hxg8B+?
      • 1...Sf7
        • 2.Qd5#
      • 1...Qf7!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sxe5#
      • 1...Sxd3+
        • 2.exd3#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sxd7
        • 2.Bxd7#
      • 1...Re4
        • 2.Qxe4#
      • 1...Sf3
        • 2.Sxe3#
      • 1...Sg4
        • 2.Qe4#
      • 1...Sg6
        • 2.hxg8Q#
        • 2.hxg8B#
      • 1...Sf7
        • 2.Qd5#
      • 1...g4
        • 2.Qe4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD,XQ(C)::S(E),XP(b)
    • R(c);N_GUARD::S(E),XP(b)
    • R(e);N_GUARD::R1(A),XR(e)
    • R(e);N_GUARD::QAR2(C),XR(e)
    • B(i);N_GUARD::QAB1(C),XB(i)
    • B(i);N_GUARD,XP(M)::QAB1(C)
    • S(f);CHECK,OGATE::P(F),XS(f)
    • S(f);S_CUTR(c)::S(E),XP(b)
    • S(f);OGATE,P_SPINS(f),XB(J)::QAR2(C),XS(f)
    • S(f);N_GUARD,S_CUTQ(h)::PXB(i)=Q
    • S(f);OGATE,XP(K)::R(N)+B(J),XS(f)
    • S(f);S_CUTB(i)::QAB1(C)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • S(f);P_SPINS(f)::B(J)
      • Refutation
        • K(d);S_FLIGHT,XP(I)
    • Try
      • B(J);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR2(C),XS(f)
      • Refutation
        • K(d);S_FLIGHT,XP(I)
    • Try
      • B(J);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR2(C),XS(f)
      • Refutation
        • K(d);S_FLIGHT,XP(I)
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • S(f);CHECK,OGATE,XR(A)::P(F),XS(f)
        • S(f);OGATE,P_SPINS(f),XB(J)::QAR2(C),XS(f)
      • Refutation
        • S(a);XS(E)
    • Try
      • P(G);
      • Threat
        • R(N)+B(J),DCHECK
      • Vars
        • S(f);CHECK,OGATE::P(F),XS(f)
      • Refutation
        • S(a);XS(E)
    • Try
      • P(M);CHECK,XB(i)
      • Vars
        • S(f);P_SPINS(f)::QAB1(C)
      • Refutation
        • Q(h);P_SPINQ(h)
    • Try
      • P(M);CHECK,XB(i)
      • Vars
        • S(f);P_SPINS(f)::QAB1(C)
      • Refutation
        • Q(h);P_SPINQ(h)
  • Actual
    • S(B);
    • Threat
      • S(B),XS(f)
    • Vars
      • S(f);CHECK,OGATE,XS(B)::P(F),XS(f)
      • S(f);OGATE,P_SPINS(f),XB(J)::QAR2(C),XS(f)
      • S(f);OGATE,XP(K)::R(N)+B(J),XS(f)
      • R(e);N_GUARD::QAR2(C),XR(e)
      • S(f);S_CUTR(c)::S(E),XP(b)
      • S(f);S_CUTR(e)::QAR2(C)
      • S(f);N_GUARD,S_CUTQ(h)::PXB(i)=Q
      • S(f);S_CUTB(i)::QAB1(C)
      • P(g);S_CUTR(e)::QAR2(C)
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