MESON Chess Problem Database

Problem Display
PID: 207181 (1R6/6pq/8/K3p1p1/N2p1Q2/5pb1/3P1P2/1NkB3R w - - 0 1)

Chicco, Adriano

4th Prize, Il Problema, 1932/I

1R6/6pq/8/K3p1p1/N2p1Q2/5pb1/3P1P2/1NkB3R

#2

9 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Bb3#
    • 1...Qf5
      • 2.Bb3#
    • 1...Qg6
      • 2.Bb3#
    • 1...Qg8
      • 2.Bb3#
    • 1...Bh4
      • 2.Bb3#
    • 1...d3
      • 2.Qc4#
  • Tries
    • 1.Be2+?
      • 1...Kc2
        • 2.Sa3#
        • 2.Rb2#
      • 1...Qxh1!
    • 1.Rc8+?
      • 1...Qc2
        • 2.Bxc2#
        • 2.Be2#
        • 2.Bxf3#
      • 1...Kxb1!
    • 1.Qe4?
      • threat
        • 2.Rc8#
      • 1...Qxh1
        • 2.Qc2#
      • 1...Qf5
        • 2.Bc2#
        • 2.Be2#
        • 2.Bb3#
        • 2.Bxf3#
      • 1...Qg6
        • 2.Bc2#
        • 2.Be2#
        • 2.Bb3#
        • 2.Bxf3#
      • 1...Qg8
        • 2.Bc2#
        • 2.Be2#
        • 2.Bb3#
        • 2.Bxf3#
        • 2.Qc2#
      • 1...Qh3
        • 2.Qc2#
        • 2.Qc6#
      • 1...Qh6
        • 2.Qc2#
      • 1...Qh8
        • 2.Qc2#
        • 2.Qc6#
      • 1...d3
        • 2.Qc6#
        • 2.Qc4#
      • 1...g6
        • 2.Qc2#
        • 2.Qc6#
      • 1...Qxe4!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Rc8#
      • 1...Qxf5
        • 2.Bb3#
      • 1...Qxh1
        • 2.Qc2#
      • 1...Qg6
        • 2.Bc2#
        • 2.Be2#
        • 2.Bb3#
        • 2.Bxf3#
      • 1...Qg8
        • 2.Bc2#
        • 2.Be2#
        • 2.Bb3#
        • 2.Bxf3#
        • 2.Qc2#
      • 1...Qh6
        • 2.Qc2#
      • 1...Qh8
        • 2.Qc2#
      • 1...d3
        • 2.Qc8#
      • 1...e4
        • 2.Qc5#
      • 1...g6
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(h);N_GUARD,SBLOCK,XS(A)::R(C)+B(B)
    • Q(h);N_GUARD::R(C)+B(B)
    • B(c);S_CUTQ(h)::R(C)+B(B)
    • P(d);OGATE::QAR(G)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • Q(h);XR(C)
    • Try
      • R(I);CHECK
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • Q(G);
      • Threat
        • R(I)
      • Vars
        • Q(h);N_GUARD,XR(C)::QAR1(G)
        • Q(h);N_GUARD::QAR1(G)
      • Refutation
        • Q(h);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • R(I)
    • Vars
      • Q(h);N_GUARD,XQ(G)::R(C)+B(B)
      • Q(h);N_GUARD,XR(C)::QAR1(G)
      • Q(h);N_GUARD::QAR1(G)
      • P(d);S_CUTQ(h)::QAB(G)
      • P(e);OGATE::QAR(G)
      • P(g);S_CUTQ(h)::QAR1(G)
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