MESON Chess Problem Database

Problem Display
PID: 21522 (K5b1/BR1PN3/p5p1/5B2/3Prp2/r3kq1R/2Q5/1nn5 w - - 0 1)

Ellerman, Arnoldo

Good Companions (November), 1919

K5b1/BR1PN3/p5p1/5B2/3Prp2/r3kq1R/2Q5/1nn5

#2

9 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.dxe5#
      • 2.d5#
    • 1...Re6
      • 2.Sd5#
    • 1...Rxe7
      • 2.d5#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Bh7
      • 2.Sd5#
    • 1...gxf5
      • 2.Sxf5#
  • Keys
    • 1.Rb2!
      • threat
        • 2.Qxe4#
      • 1...Rxd4+
        • 2.Qe4#
      • 1...Re5+
        • 2.d5#
      • 1...Re6+
        • 2.Sd5#
      • 1...Rxe7+
        • 2.d5#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...gxf5
        • 2.Sxf5#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Rd3
        • 2.Qf2#
      • 1...Sc3
        • 2.Qd2#
      • 1...Sd3
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(f);P_PINR(F),S_CUTB(j)::S(H)
    • R(f);N_GUARD,P_PINR(F),XS(H)::B(E)+P(C)
    • B(j);N_GUARD,P_PINR(F)::S(H),XB(j)
    • B(j);N_GUARD::S(H)
    • P(i);XB(D)::S(H),XP(i)
  • Actual
    • R(F);
    • Threat
      • QAR1(A),XR(f)
    • Vars
      • R(f);CHECK,P_SPINR(f),XP(C)::QAR1(A)
      • R(f);CHECK,N_GUARD::B(E)+P(C)
      • R(f);CHECK,S_CUTB(j)::S(H)
      • R(f);CHECK,N_GUARD,XS(H)::B(E)+P(C)
      • B(j);CHECK,N_GUARD::S(H),XB(j)
      • P(i);XB(D)::S(H),XP(i)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(b);N_GUARD::QAR1(A),XS(b)
      • R(c);SBLOCK::QAB1(A)
      • S(a);N_GUARD::QAB1(A)
      • S(b);N_GUARD::QAR1(A)
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