MESON Chess Problem Database

Problem Display
PID: 21213 (4B3/2p1R3/8/3k4/N1N4p/2Kp1r1r/3P3b/7Q w - - 0 1)

Ellerman, Arnoldo

Good Companions (July), 1917

4B3/2p1R3/8/3k4/N1N4p/2Kp1r1r/3P3b/7Q

#2

7 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Re5#
    • 1...Bg1
      • 2.Re5#
    • 1...Bg3
      • 2.Qxf3#
    • 1...Be5+
      • 2.Rxe5#
    • 1...Bd6
      • 2.Se3#
    • 1...c5
      • 2.Sab6#
    • 1...c6
      • 2.Bf7#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qe4#
        • 2.Qe6#
      • 1...Be5+
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Rf4
        • 2.Re5#
        • 2.Qe5#
        • 2.Qe6#
      • 1...Rf6
        • 2.Qe4#
      • 1...Re3!
  • Keys
    • 1.Qg2!
      • 1...Be5+
        • 2.Rxe5#
      • 1...Bf4
        • 2.Qg8#
      • 1...Rg3
        • 2.Re5#
      • 1...Bg1
        • 2.Re5#
      • 1...Bg3
        • 2.Qxf3#
      • 1...Bd6
        • 2.Se3#
      • 1...c5
        • 2.Sab6#
      • 1...c6
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(d);S_CUTB(a)::R1(F)
    • B(a);N_GUARD::R1(F)
    • B(a);S_CUTR(d)::QAB(A),XR(c)
    • B(a);CHECK,N_GUARD::R1(F),XB(a)
    • B(a);SBLOCK::S(E)
    • P(g);N_GUARD,SBLOCK::S(D)
    • P(g);SBLOCK::B(G)
  • Tries
    • Try
      • Q(A);N_PINR(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAB1(A)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Vars
      • B(a);CHECK,N_GUARD::R1(F),XB(a)
      • B(a);::QAB(A)
      • R(d);S_CUTB(a)::R1(F)
      • B(a);N_GUARD::R1(F)
      • B(a);S_CUTR(d)::QAB(A),XR(c)
      • B(a);SBLOCK::S(E)
      • P(g);N_GUARD,SBLOCK::S(D)
      • P(g);SBLOCK::B(G)
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