MESON Chess Problem Database

Problem Display
PID: 264495 (3R4/bN6/4Kn2/2p5/1RN1k1n1/5p1p/q7/1bB2B1Q w - - 0 1)

Bottacchi, Antonio

4th Prize, La Settimana Enigmistica, 1933/I

3R4/bN6/4Kn2/2p5/1RN1k1n1/5p1p/q7/1bB2B1Q

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4+
      • 2.Rxc4#
    • 1...Qa1
      • 2.Scd6#
    • 1...Qb2
      • 2.Scd6#
    • 1...Qc2
      • 2.Scd6#
    • 1...Qf2
      • 2.Scd6#
    • 1...Qg2
      • 2.Scd6#
    • 1...Qh2
      • 2.Scd6#
    • 1...Qa3
      • 2.Scd6#
    • 1...Qa4
      • 2.Scd6#
    • 1...Qa5
      • 2.Scd6#
    • 1...Qa6+
      • 2.Scd6#
    • 1...Bd3
      • 2.Bxd3#
    • 1...Bb8
      • 2.Sxc5#
    • 1...Sd5
      • 2.Scd6#
  • Tries
    • 1.Rd4+?
      • 1...cxd4
        • 2.Sd6#
      • 1...Kxd4!
    • 1.Rd5?
      • threat
        • 2.Scd6#
        • 2.Sbd6#
      • 1...Qa6+
        • 2.Scd6#
      • 1...Qxc4
        • 2.Sd6#
        • 2.Rxc4#
      • 1...Sxd5
        • 2.Scd6#
      • 1...Se3
        • 2.Sd2#
        • 2.Scd6#
      • 1...Qh2
        • 2.Scd6#
      • 1...Bb8
        • 2.Scd6#
        • 2.Sxc5#
      • 1...Se8
        • 2.Scd6#
      • 1...Qd2!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Sd6#
      • 1...Qxc4+
        • 2.Rxc4#
      • 1...Qa6+
        • 2.Scd6#
      • 1...Qd2
        • 2.Sxd2#
        • 2.Scd6#
      • 1...Se3
        • 2.Qxe3#
      • 1...f2
        • 2.Qh1#
      • 1...Qe2
        • 2.Sd2#
      • 1...Qf2
        • 2.Scd6#
      • 1...Qh2
        • 2.Sd2#
        • 2.Scd6#
      • 1...Bb8
        • 2.Sxc5#
      • 1...Sf2
        • 2.Qg6#
      • 1...Se8
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::R(D),XQ(b)
    • Q(b);N_PINS(E)::R(D)+S(E),DCHECK
    • Q(b);N_PINS(E),N_SPINP(c)::R(D)+S(E),DCHECK
    • Q(b);CHECK,N_PINS(E)::R(D)+S(E),DCHECK
    • B(a);N_GUARD::B(B),XB(a)
    • B(i);N_GUARD::S(G),XP(g)
    • S(h);N_PINS(E)::R(D)+S(E),DCHECK
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • P(g);SBLOCK,XR(H)::S(G)
      • Refutation
        • K(e);N_SPINP(c),P-FLIGHT,XR(H)
    • Try
      • R(H);N_SPINS(E)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK::R(D)+S(E),DCHECK
        • S(h);XR(H)::R(D)+S(E),DCHECK
        • Q(b);::R(D)+S(E),DCHECK
        • S(h);::R(D)+S(E),DCHECK
      • Refutation
        • Q(b);
  • Actual
    • Q(C);N_PINP(c)
    • Threat
      • S(G)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::R(D),XQ(b)
      • Q(b);CHECK,N_PINS(E)::R(D)+S(E),DCHECK
      • S(f);N_GUARD::QAR1(C),XS(f)
      • P(c);OGATEB::QAB(C)
      • Q(b);N_PINS(E)::R(D)+S(E),DCHECK
      • B(i);N_GUARD::S(G),XP(g)
      • S(f);OGATE::QAB(C)
      • S(h);N_GUARD::QAR2(C),XS(f)
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