MESON Chess Problem Database

Problem Display
PID: 60755 (Q3b3/1K1PR2n/1PpBNp2/1pb2RP1/4kpP1/p4r2/1rq1Pp2/1B1N4 w - - 0 1)

Stimson, James Frank (Ua Tane)

Good Companions (July), 1920

Q3b3/1K1PR2n/1PpBNp2/1pb2RP1/4kpP1/p4r2/1rq1Pp2/1B1N4

#2

13 + 13

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sxf2#
    • 1...Be3
      • 2.Sc3#
    • 1...Bd4
      • 2.Sc5#
    • 1...fxg5
      • 2.Re5#
  • Tries
    • 1.Bxc2+?
      • 1...Rd3
        • 2.Bxd3#
      • 1...Rxc2!
    • 1.gxf6?
      • threat
        • 2.Re5#
      • 1...Bd4
        • 2.Sc5#
        • 2.Sg5#
      • 1...Bxd6!
  • Keys
    • 1.Kxc6!
      • threat
        • 2.Kc7#
      • 1...Be3+
        • 2.Sc3#
      • 1...Bb4+
        • 2.Kxb5#
      • 1...Bd4+
        • 2.Sc5#
      • 1...Bxb6+
        • 2.Kxb6#
      • 1...Bxd6+
        • 2.Kxd6#
      • 1...Bxd7+
        • 2.Kxd7#
      • 1...Rd3
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD,SBLOCK,S_CUTB(i)::S(B),XP(c)
    • B(i);SBLOCK,S_CUTR(e)::S(B)
    • B(i);SBLOCK::R(L)+S(I),DCHECK
    • P(k);N_GUARD,XP(F)::R1(E)
  • Tries
    • Try
      • B(A);CHECK,XQ(b)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::B(A),XR(e)
      • Refutation
        • R(a);XB(A)
    • Try
      • P(F);XP(k)
      • Threat
        • R1(E)
      • Refutation
        • B(i);XB(H)
  • Actual
    • K(J);P_SPINP(K),S_FLIGHT,XP(j)
    • Threat
      • QAB(M)+K(J)
    • Vars
      • B(i);CHECK,SBLOCK,S_CUTR(e)::S(B)
      • B(i);CHECK::QAB(M)+K(J),XP(h)
      • B(i);CHECK,SBLOCK::R(L)+S(I),DCHECK
      • B(i);CHECK,XP(G)::QAB(M)+K(J),XB(i)
      • B(i);CHECK,XB(H)::QAB(M)+K(J),XB(i)
      • B(m);CHECK,XP(K)::QAB(M)+K(J),XB(m)
      • R(e);N_GUARD,N_SPINQ(b)::R1(E),XP(g)
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