MESON Chess Problem Database

Problem Display
PID: 65057 (7q/1Np3B1/2p2r2/nBR1b3/3kp1Q1/R4r2/5P1p/n2N3K w - - 0 1)

Ellerman, Arnoldo

3rd Prize, Good Companions (November), 1921

7q/1Np3B1/2p2r2/nBR1b3/3kp1Q1/R4r2/5P1p/n2N3K

#2

9 + 11

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Rd3#
    • 1...Rd3
      • 2.Rxd3#
    • 1...Re3
      • 2.fxe3#
    • 1...R3f5
      • 2.Rd3#
    • 1...Rf4
      • 2.Qd7#
    • 1...Rf8
      • 2.Qd7#
    • 1...Sb3
      • 2.Ra4#
  • Keys
    • 1.Se3!
      • threat
        • 2.Rd3#
      • 1...Rxe3
        • 2.fxe3#
      • 1...Sxb7
        • 2.Rc4#
      • 1...cxb5
        • 2.Rd5#
      • 1...R3f4
        • 2.Qd1#
      • 1...R6f4
        • 2.Qd7#
      • 1...Bf4
        • 2.Sf5#
      • 1...S1b3
        • 2.Sc2#
      • 1...S5b3
        • 2.Ra4#
      • 1...Sc4
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD,XP(C)::R1(D)
    • R(c);N_GUARD::R1(D),XR(c)
    • R(c);OGATE::P(C),XR(c)
    • R(c);N_GUARD::R1(D)
    • R(i);N_GUARD,N_SPINP(e),P_SPINB(g)::QAR(E)
    • R(i);N_GUARD,P_SPINB(g)::QAR(E)
    • S(f);N_GUARD::R(D)
  • Actual
    • S(A);
    • Threat
      • R1(D)
    • Vars
      • R(c);OGATE,XS(A)::P(C),XR(c)
      • S(f);N_GUARD,XS(H)::R1(G)
      • P(h);N_GUARD,XB(F)::R1(G)
      • R(c);N_SPINP(e),OGATE::QAR(E)
      • R(i);N_GUARD,N_SPINP(e),P_SPINB(g)::QAR(E)
      • B(g);N_SPINP(e),P_SPINR(i),S_CUTR(c)::S(A)
      • S(a);N_GUARD::S(A)
      • S(f);N_GUARD::R(D)
      • S(f);N_GUARD::R1(G),XS(f)
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