MESON Chess Problem Database

Problem Display
PID: 21786 (n5r1/4R2q/2ppN3/R1bk4/1P1Bpp1p/1P4Q1/2N1p1n1/4rbKB w - - 0 1)

Ellerman, Arnoldo

1st Prize, Good Companions (February), 1921

n5r1/4R2q/2ppN3/R1bk4/1P1Bpp1p/1P4Q1/2N1p1n1/4rbKB

#2

10 + 14

3132 The Good Companion Two-Mover 1922
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Sxf4#
    • 1...Sb6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...e3
      • 2.Sxf4#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qc4#
      • 1...e3
        • 2.Sxf4#
      • 1...Sb6
        • 2.Sc7#
      • 1...Se3+!
    • 1.Qg5+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...Rxg5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qc4#
      • 1...Se3+
        • 2.Bg7#
      • 1...exd3
        • 2.Sxf4#
      • 1...Sb6
        • 2.Sc7#
      • 1...e3
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD,N_PINB(G),P_PINQ(E),P_SPINP(e)::S(I),XP(f)
    • S(m);N_GUARD::S(I)
    • S(m);N_GUARD::S(I),XS(m)
    • P(e);N_PINB(G),P_SPINS(d)::S(I),XP(f)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(e);N_PINB(G),P_SPINS(d)::S(I),XP(f)
        • S(m);N_GUARD::S(I)
      • Refutation
        • S(d);CHECK,N_PINB(G),P_SPINP(e)
    • Try
      • Q(E);CHECK
      • Vars
        • Q(l);N_GUARD,P_SPINQ(l)::QAR2(E),XQ(l)
      • Refutation
        • R(n);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • S(d);CHECK,N_PINB(G),P_SPINP(e)::QAR(E)+B(G)
      • P(e);P_SPINS(d),XQ(E)::S(I),XP(f)
      • S(m);N_GUARD::S(I)
      • P(e);N_PINB(G),P_SPINS(d)::S(I),XP(f)
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