MESON Chess Problem Database

Problem Display
PID: 21504 (2b2q2/2N3r1/6n1/6RB/4kP1n/p1Bpp2p/4N3/KQ6 w - - 0 1)

Ellerman, Arnoldo

Good Companions (January), 1919

2b2q2/2N3r1/6n1/6RB/4kP1n/p1Bpp2p/4N3/KQ6

#2

8 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Qxb4#
    • 1...Qxf4
      • 2.Qb4#
    • 1...Qf5
      • 2.Qb4#
    • 1...Qe8
      • 2.Qb4#
    • 1...Qh8
      • 2.Qb4#
    • 1...Re7
      • 2.Qb4#
    • 1...Bg4
      • 2.Qb7#
    • 1...Bf5
      • 2.Qb7#
    • 1...Bb7
      • 2.Qxb7#
    • 1...Sf5
      • 2.Qh1#
    • 1...Sxf4
      • 2.Sg3#
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Se7
      • 2.Re5#
      • 2.Qb4#
    • 1...Sh8
      • 2.Re5#
  • Tries
    • 1.Be5?
      • threat
        • 2.Sc3#
        • 2.Sg3#
      • 1...Qxf4
        • 2.Sc3#
        • 2.Qb4#
      • 1...Sxe5
        • 2.Rxe5#
      • 1...Bg4
        • 2.Qb7#
      • 1...Qb4
        • 2.Sg3#
        • 2.Qxb4#
      • 1...Qc5
        • 2.Sg3#
      • 1...Sf5
        • 2.Sc3#
        • 2.Qh1#
      • 1...Rxc7!
    • 1.Qh1+?
      • 1...Sf3
        • 2.Bxf3#
        • 2.Qxf3#
      • 1...Sg2!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qxd3#
      • 1...Qxf5
        • 2.Qb4#
      • 1...Bxf5
        • 2.Qb7#
      • 1...Sxf5
        • 2.Qh1#
      • 1...Sxf4
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Se7
        • 2.Re5#
      • 1...Sh8
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(j);N_GUARD::QAR(B),XQ(j)
    • Q(j);N_GUARD,XP(E)::QAR(B)
    • Q(j);N_GUARD::QAR(B)
    • R(h);S_CUTQ(j)::QAR(B)
    • B(i);N_GUARD::QAB(B)
    • B(i);N_GUARD::QAB(B),XB(i)
    • S(f);N_GUARD::QAB(B)
    • S(g);N_GUARD::R1(F),XS(g)
    • S(g);N_GUARD::R1(F)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);OGATE,XB(D)::R1(F),XS(g)
        • B(i);N_GUARD::QAB(B)
        • Q(j);::S(C)
      • Refutation
        • R(h);XS(H)
    • Try
      • Q(B);CHECK,N_PINP(b)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • R(F);
    • Threat
      • S(C)
    • Vars
      • K(e);S_FLIGHT,XR(F)::QAB(B),XP(b)
      • Q(j);N_GUARD,SBLOCK,XR(F)::QAR(B)
      • B(i);N_GUARD,SBLOCK,XR(F)::QAB(B)
      • S(f);N_GUARD,SBLOCK,XR(F)::QAB(B)
      • S(g);N_GUARD,XP(E)::R1(F)
      • S(g);N_GUARD::R1(F),XS(g)
      • S(g);N_GUARD::R1(F)
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