MESON Chess Problem Database

Problem Display
PID: 65173 (3N3B/p4B1n/2K1p2r/Rn2pkpp/2Qb4/2pPPNRP/5pq1/8 w - - 0 1)

Ellerman, Arnoldo

3rd Prize=, Good Companions (March), 1922

3N3B/p4B1n/2K1p2r/Rn2pkpp/2Qb4/2pPPNRP/5pq1/8

#2

11 + 13

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3+
      • 2.Rxf3#
    • 1...Bxe3
      • 2.Qe4#
    • 1...Bc5
      • 2.Qe4#
    • 1...Bb6
      • 2.Qe4#
    • 1...Sf6
      • 2.Qxe6#
    • 1...e4
      • 2.Sxd4#
  • Tries
    • 1.Bxe6+?
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Kg6!
    • 1.Qd5?
      • threat
        • 2.Qe4#
      • 1...Qxf3
        • 2.Rxf3#
        • 2.Qxf3#
      • 1...Sd6
        • 2.Sxd4#
      • 1...Sf6
        • 2.Qxe6#
      • 1...exd5+!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.e4#
      • 1...Qxf3+
        • 2.Rxf3#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Bxe3
        • 2.Qe4#
      • 1...Sd6
        • 2.Sxd4#
      • 1...Sf6
        • 2.Sg7#
      • 1...e4
        • 2.Sxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,OGATE,XS(C)::R(D),XQ(b)
    • B(d);OGATE,XP(B)::QAB1(F)
    • B(d);OGATE::QAB1(F)
    • S(m);S_CUTR(k)::QAB1(F),XP(j)
    • P(f);N_PINS(C),P_SPINS(e)::S(C),XB(d)
  • Tries
    • Try
      • B(I);CHECK,P_SPINB(I),XP(j)
      • Vars
        • R(k);CHECK,OGATE,XB(I)::QAB1(F),XR(k)
      • Refutation
        • K(g);N_PINB(I),P_SPINP(h),S_FLIGHT
    • Try
      • Q(F);N_SPINS(C),P_PINP(f)
      • Threat
        • QAB1(F)
      • Vars
        • S(e);N_GUARD::S(C),XB(d)
        • S(m);S_CUTR(k)::QAB1(F),XP(j)
      • Refutation
        • P(j);CHECK,N_SPINP(f),XQ(F)
  • Actual
    • S(J);XP(j)
    • Threat
      • P(B)
    • Vars
      • Q(b);CHECK,OGATE,P_PINS(J),XS(C)::R(D),XQ(b)
      • R(k);CHECK,OGATE,XS(J)::QAB1(F),XR(k)
      • B(d);OGATE,XP(B)::QAB1(F)
      • S(e);P_SPINP(f)::S(J),XB(d)
      • S(m);SBLOCK::S(J)
      • P(f);N_PINS(C),P_PINS(J),P_SPINS(e)::S(C),XB(d)
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