MESON Chess Problem Database

Problem Display
PID: 64669 (3R4/2Nb4/B3p3/r5p1/1B1k2K1/p2P4/3prp2/5N1Q w - - 0 1)

Ellerman, Arnoldo

2nd HM., Good Companions (January), 1920

3R4/2Nb4/B3p3/r5p1/1B1k2K1/p2P4/3prp2/5N1Q

#2

8 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qh8#
    • 1...Re4+
      • 2.Qxe4#
    • 1...e5+
      • 2.Se6#
  • Tries
    • 1.Rxd7+?
      • 1...Ke5
        • 2.Bc3#
        • 2.Qh8#
      • 1...Rd5!
    • 1.Qc6?
      • threat
        • 2.Bc3#
        • 2.Qc3#
      • 1...Re4+
        • 2.Qxe4#
      • 1...e5+
        • 2.Se6#
      • 1...Ke5
        • 2.Bc3#
        • 2.Qc3#
      • 1...Rxa6
        • 2.Qc3#
      • 1...Rb5
        • 2.Qc3#
      • 1...Rc5
        • 2.Qxc5#
      • 1...d1S!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qe4#
      • 1...e5+
        • 2.Sf5#
      • 1...Kxe3
        • 2.Qe4#
      • 1...Ke5
        • 2.Qa1#
        • 2.Qh8#
      • 1...Rxe3
        • 2.Qa1#
      • 1...Re5
        • 2.Sc2#

There are these versions: 198105

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(e);N_SPINB(i),S_FLIGHT::QAB(B)
    • R(b);CHECK,N_GUARD::QAR1(B),XR(b)
    • P(h);CHECK,SBLOCK,S_CUTR(b)::S(G)
  • Tries
    • Try
      • R(H);CHECK,XB(i)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,N_GUARD::QAR1(B),XR(b)
        • P(h);CHECK,SBLOCK,S_CUTR(b)::S(G)
        • R(f);XB(F)::QAB1(B)
        • R(f);::QAB1(B)
        • R(f);N_GUARD::QAB1(B),XR(f)
      • Refutation
        • P(a);
  • Actual
    • S(A);
    • Threat
      • QAR1(B)
    • Vars
      • P(h);CHECK,N_GUARD,SBLOCK,S_CUTR(f)::S(A)
      • K(e);N_SPINB(i),S_FLIGHT,XS(A)::QAR1(B)
      • R(b);SBLOCK,XS(A)::QAB(B)
      • R(f);SBLOCK::S(A)
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