MESON Chess Problem Database

Problem Display
PID: 64519 (Q7/3Rp3/n2b2N1/1B6/1B1kr1bR/1P2p1N1/1Pqpp2K/8 w - - 0 1)

Ellerman, Arnoldo

3rd HM., Good Companions (January), 1921

Q7/3Rp3/n2b2N1/1B6/1B1kr1bR/1P2p1N1/1Pqpp2K/8

#2

10 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxe4#
    • 1...Qxb3
      • 2.Qxe4#
    • 1...Qc1
      • 2.Qxe4#
    • 1...Qxb2
      • 2.Qxe4#
    • 1...Qc3
      • 2.Qxe4#
      • 2.bxc3#
    • 1...Qc4
      • 2.Qxe4#
    • 1...Qc5
      • 2.Qxe4#
    • 1...Qc7
      • 2.Qxe4#
    • 1...Qc8
      • 2.Qxe4#
    • 1...Re5
      • 2.Sxe2#
    • 1...e5
      • 2.Rxd6#
    • 1...e6
      • 2.Rxd6#
  • Tries
    • 1.Bc3+?
      • 1...Kc5
        • 2.Qc6#
      • 1...Qxc3!
    • 1.Qh8+?
      • 1...Re5
        • 2.Qxe5#
      • 1...e5
        • 2.Rxd6#
      • 1...Kd5!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Qd5#
      • 1...Qxc4
        • 2.Qxe4#
      • 1...Sxb4
        • 2.Qa7#
      • 1...Re5
        • 2.Sxe2#
      • 1...Be6
        • 2.Qh8#
      • 1...Sc7
        • 2.Qa7#
      • 1...e6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::QAR1(J),XR(f)
    • Q(a);N_GUARD,XP(C)::QAR1(J),XR(f)
    • Q(a);N_GUARD,XP(A)::QAR1(J),XR(f)
    • R(f);N_PINS(D),N_SPINB(i),P_SPINB(g)::S(D),XP(c)
    • P(j);N_GUARD,N_PINS(D)::R(I),XB(i)
    • P(j);N_GUARD::R(I),XB(i)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(e);N_SPINB(i),S_FLIGHT::QAR1(J)
      • Refutation
        • Q(a);XB(E)
    • Try
      • Q(J);CHECK
      • Vars
        • R(f);N_GUARD,N_PINS(D),N_SPINB(i),P_SPINB(g),P_SPINR(f)::QAB1(J),XR(f)
        • P(j);N_PINS(D),P_SPINP(j)::R(I),XB(i)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • B(G);
    • Threat
      • QAR1(J)
    • Vars
      • Q(a);N_GUARD,XB(G)::QAR1(J),XR(f)
      • S(h);N_GUARD,XB(E)::QAB(J)
      • R(f);N_PINS(D),N_SPINB(i),P_SPINB(g)::S(D),XP(c)
      • B(g);P_SPINR(f),S_CUTP(j)::QAB(J)
      • S(h);N_GUARD::QAB(J)
      • P(j);N_GUARD::R(I),XB(i)
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