MESON Chess Problem Database

Problem Display
PID: 6757 (8/2Kp1N1r/2b1pp1n/R3nk1P/2N4R/3r1p2/2q1P3/1Q6 w - - 0 1)

Ellerman, Arnoldo

4th Prize, Il Problema, 1933

8/2Kp1N1r/2b1pp1n/R3nk1P/2N4R/3r1p2/2q1P3/1Q6

#2

8 + 11

5137 1001 Problemas 1945
56 The Problemist 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Se3#
      • 2.Scd6#
    • 1...Qb3
      • 2.Se3#
      • 2.Scd6#
    • 1...Qa4
      • 2.Se3#
      • 2.Scd6#
    • 1...Qc1
      • 2.Scd6#
    • 1...Qa2
      • 2.Se3#
      • 2.Scd6#
    • 1...Qb2
      • 2.Se3#
      • 2.Scd6#
    • 1...Qd2
      • 2.Scd6#
    • 1...Qxe2
      • 2.Scd6#
    • 1...Qc3
      • 2.Se3#
      • 2.Scd6#
    • 1...Rd1
      • 2.Se3#
    • 1...Rd2
      • 2.Se3#
    • 1...Ra3
      • 2.Scd6#
    • 1...Rb3
      • 2.Scd6#
    • 1...Rc3
      • 2.Scd6#
    • 1...Re3
      • 2.Sxe3#
      • 2.Scd6#
    • 1...Rd4
      • 2.Se3#
    • 1...Rd5
      • 2.Se3#
    • 1...Rd6
      • 2.Se3#
      • 2.Scxd6#
    • 1...Ba4
      • 2.e4#
    • 1...Bb5
      • 2.e4#
    • 1...d5
      • 2.Sd6#
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qg6#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Rd5
        • 2.Se3#
      • 1...Rg7
        • 2.Sxh6#
      • 1...Bb5
        • 2.e4#
      • 1...Bd5
        • 2.Sd6#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(a);P_SPINR(b)::S(C)
    • Q(a);P_SPINR(b),XP(B)::S(C)
    • R(b);N_GUARD,P_SPINQ(a)::S(C)
    • R(b);N_GUARD,N_SPINS(d),P_SPINQ(a)::S(C)
    • B(f);N_GUARD,P_PINS(C)::P(B)
    • B(f);N_GUARD,N_SPINS(d),P_PINS(C)::P(B)
    • P(j);N_SPINS(d),P_PINS(H),S_CUTR(b)::S(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • S(i);N_GUARD::QAB1(A),XS(i)
      • R(b);N_GUARD,N_SPINS(d)::S(C)
      • R(k);N_GUARD::S(H),XS(i)
      • B(f);N_GUARD,N_SPINS(d),P_PINS(C)::P(B)
      • B(f);N_SPINS(d),P_PINS(C),S_CUTR(b)::S(H)
      • P(j);N_SPINS(d),P_PINS(H),S_CUTR(b)::S(C)
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