MESON Chess Problem Database

Problem Display
PID: 21671 (2K5/5b2/2ppk1rR/1p5p/3Pr1NB/2P1N2B/4Q2P/2b1qR2 w - - 0 1)

Ellerman, Arnoldo

3rd Prize, Good Companions (February), 1920

2K5/5b2/2ppk1rR/1p5p/3Pr1NB/2P1N2B/4Q2P/2b1qR2

#2

11 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Sxe3#
    • 1...Re5
      • 2.Sxe5#
    • 1...Bg8
      • 2.Rxg6#
    • 1...c5
      • 2.d5#
  • Tries
    • 1.Qc4+?
      • 1...d5
        • 2.Qxc6#
      • 1...bxc4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc7#
      • 1...Kxd5
        • 2.Qa2#
      • 1...Qxh4
        • 2.Qxe4#
      • 1...Qxf1
        • 2.Qxe4#
      • 1...cxd5
        • 2.Sf2#
      • 1...Qf2
        • 2.Qxe4#
      • 1...Bf4
        • 2.Sge3#
      • 1...Rf6
        • 2.Sgxf6#
      • 1...Bg5
        • 2.Sgf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(c);N_SPINR(i),P_SPINR(c),XS(E)::B(F)+S(H),XR(c)
    • R(c);N_GUARD::B(F)+S(H),XR(c)
    • B(j);N_GUARD::R(J),XR(i)
    • P(f);N_GUARD::P(G)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(g);OGATEB,P_SPINP(g)::QAR2(B),XP(f)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • S(E);N_PINR(i),P_PINR(c)
    • Threat
      • S(E)
    • Vars
      • K(h);N_SPINR(c),OGATEB,S_FLIGHT,XS(E)::QAB(B)
      • Q(b);N_GUARD,XB(I)::QAR2(B),XR(c)
      • Q(b);N_GUARD,XR(A)::QAR2(B),XR(c)
      • P(f);SBLOCK,XS(E)::B(F)+S(H)
      • Q(b);N_GUARD::QAR2(B),XR(c)
      • B(a);::B(F)+S(H)
      • R(i);N_GUARD::B(F)+S(H),XR(i)
      • B(a);S_CUTR(i)::B(F)+S(H)
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