MESON Chess Problem Database

Problem Display
PID: 48747 (4R3/3P2p1/1p1NK1Q1/3p4/1B3P2/Rq2k2N/3pB1P1/b2n1r2 w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Neue Leipziger Zeitung, 1932

4R3/3P2p1/1p1NK1Q1/3p4/1B3P2/Rq2k2N/3pB1P1/b2n1r2

#2

11 + 9

371 The Chess Review 1933

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Kxd5#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Bc3
      • 2.Qd3#
    • 1...Sc3
      • 2.Qd3#
    • 1...d4+
      • 2.Kf5#
  • Tries
    • 1.Kf5+?
      • 1...Kd4
        • 2.Sb5#
        • 2.Qxg7#
      • 1...Be5!
    • 1.Kf7+?
      • 1...Kd4
        • 2.Sb5#
        • 2.Sf5#
        • 2.Qxg7#
      • 1...Be5!
    • 1.Rxb3+?
      • 1...Kd4
        • 2.Sb5#
        • 2.Rd3#
        • 2.Qd3#
        • 2.Qxg7#
      • 1...Bc3
        • 2.Kxd5#
        • 2.Qd3#
      • 1...Sc3
        • 2.Qd3#
      • 1...Kxe2!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qxd2#
      • 1...d4+
        • 2.Kf5#
      • 1...Kxe2
        • 2.Qxd2#
      • 1...Kd4
        • 2.Sf5#
      • 1...Qc3
        • 2.Kxd5#
      • 1...Qd3
        • 2.Qxd3#
      • 1...Bc3
        • 2.Qd3#
      • 1...Sc3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(e);::R(K)+K(H),XP(g)
    • Q(e);N_GUARD::QAR1(I),XQ(e)
    • B(a);N_SPINQ(e),S_CUTQ(e)::QAR1(I)
    • S(b);N_SPINQ(e),S_CUTQ(e)::QAR1(I)
    • P(g);CHECK,SBLOCK,S_CUTB(a)::R(K)+K(H)
  • Tries
    • Try
      • K(H);CHECK,P_SPINP(F),S_FLIGHT
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • K(H);CHECK,P_SPINP(F),S_FLIGHT
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • R(C);CHECK,XQ(e)
      • Vars
        • S(b);P_SPINS(b)::QAR1(I)
      • Refutation
        • K(f);P-FLIGHT,XB(A)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I),XP(d)
    • Vars
      • P(g);CHECK,SBLOCK,S_CUTB(a)::R(K)+K(H)
      • K(f);N_SPINQ(e),P-FLIGHT,P_SPINP(d),XB(A)::QAR1(I),XP(d)
      • K(f);N_SPINQ(e),S_FLIGHT::S(G)
      • Q(e);::R(K)+K(H),XP(g)
      • Q(e);N_GUARD::QAR1(I),XQ(e)
      • B(a);N_SPINQ(e),S_CUTQ(e)::QAR1(I)
      • S(b);N_SPINQ(e),S_CUTQ(e)::QAR1(I)
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