MESON Chess Problem Database

Problem Display
PID: 132343 (4N3/2p1pRp1/7q/B1kp4/BR1p4/8/7p/4Q2K w - - 0 1)

Ellerman, Arnoldo

1st Prize, L'Italia Scacchistica, 1951

4N3/2p1pRp1/7q/B1kp4/BR1p4/8/7p/4Q2K

#2

7 + 8

3147 Chess Problems: Introduction to an Art 1963
6479 Problemschach (Sidler) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qxc1#
    • 1...Qd2
      • 2.Qxe7#
    • 1...Qh3
      • 2.Qxe7#
    • 1...Qh4
      • 2.Qc1#
    • 1...Qh5
      • 2.Qc1#
      • 2.Qxe7#
    • 1...Qb6
      • 2.Qc1#
    • 1...Qc6
      • 2.Qc1#
    • 1...Qd6
      • 2.Qc1#
    • 1...Qe6
      • 2.Qc1#
    • 1...Qf6
      • 2.Qc1#
    • 1...Qh7
      • 2.Qxe7#
    • 1...Qh8
      • 2.Qc1#
      • 2.Qxe7#
    • 1...d3
      • 2.Qc3#
    • 1...c6
      • 2.Bb6#
    • 1...e6
      • 2.Rxc7#
    • 1...g5
      • 2.Qc1#
    • 1...g6
      • 2.Qxe7#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Qc1
        • 2.Qxc1#
      • 1...Qb6
        • 2.Qc1#
      • 1...Qd2!
    • 1.Rc4+?
      • 1...dxc4
        • 2.Qe5#
      • 1...Kxc4!
    • 1.Rb6?
      • threat
        • 2.Qb4#
      • 1...Qxb6
        • 2.Qc1#
      • 1...Qc1
        • 2.Rc6#
        • 2.Qxc1#
      • 1...Qd2
        • 2.Rc6#
      • 1...Kc4!
    • 1.Rb7?
      • threat
        • 2.Qb4#
      • 1...Qc1
        • 2.Rxc7#
        • 2.Qxc1#
      • 1...Qd2
        • 2.Rxc7#
      • 1...Qb6
        • 2.Qc1#
      • 1...Kc4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb7#
      • 1...Kxd6
        • 2.Qxe7#
      • 1...Qxd6
        • 2.Qc1#
      • 1...cxd6
        • 2.Bb6#
      • 1...exd6
        • 2.Rxc7#

This is a version of 17847

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • Q(e);N_GUARD,P_PINQ(A)::QAR(A),XQ(e)
    • Q(e);N_GUARD::QAB(A),XP(g)
    • Q(e);N_GUARD::QAR(A)
    • P(b);N_GUARD::QAR2(A)
    • P(f);N_GUARD,S_CUTQ(e)::B(E)
    • P(g);OGATE::R(F),XP(f)
    • P(h);S_CUTQ(e)::QAR(A)
    • P(h);S_CUTQ(e)::QAB(A),XP(g)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
        • Q(e);N_GUARD,P_PINQ(A)::QAR(A),XQ(e)
        • Q(e);N_GUARD::QAR(A)
      • Refutation
        • Q(e);
    • Try
      • R(D);CHECK
      • Vars
        • P(d);SBLOCK,XR(D)::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT,XR(D)
    • Try
      • R(D);
      • Threat
        • QAB1(A)
      • Vars
        • Q(e);N_GUARD,XR(D)::QAR(A)
        • Q(e);N_GUARD::R1(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(D);
      • Threat
        • QAB1(A)
      • Vars
        • Q(e);N_GUARD::R(D),XP(f)
        • Q(e);N_GUARD::QAR(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(G)::QAB1(A),XP(g)
      • Q(e);N_GUARD,SBLOCK,XS(G)::QAR(A)
      • P(f);N_GUARD,SBLOCK,XS(G)::B(E)
      • P(g);OGATE,SBLOCK,XS(G)::R(F),XP(f)
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