MESON Chess Problem Database

Problem Display
PID: 205825 (3R4/K3p3/3NkPP1/3N1p2/5n1b/Q1P1nP2/B3b2B/4R3 w - - 0 1)

Cristoffanini, Guido

1st HM., Brisbane Courier, 1931

(First published on Sat Nov 21 1931)

3R4/K3p3/3NkPP1/3N1p2/5n1b/Q1P1nP2/B3b2B/4R3

#2

12 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Rxe3#
    • 1...Bf1
      • 2.Rxe3#
    • 1...Bb5
      • 2.Rxe3#
    • 1...Ba6
      • 2.Rxe3#
    • 1...exd6
      • 2.Qxd6#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Qxe7#
      • 1...Bxf6
        • 2.Sxf4#
        • 2.Sc7#
      • 1...exf6
        • 2.Sxf4#
        • 2.Sc7#
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qe7#
      • 1...Sxg6!
    • 1.Se8?
      • threat
        • 2.Qxe7#
      • 1...Ke5
        • 2.Qxe7#
      • 1...Sxg6
        • 2.Sdc7#
      • 1...exf6
        • 2.Qd6#
        • 2.Qe7#
      • 1...Bxf6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Sc4#
      • 1...Ke5
        • 2.Sf7#
      • 1...Bxa6
        • 2.Rxe3#
      • 1...Sexd5
        • 2.Sf7#
      • 1...Sfxd5
        • 2.Sb5#
      • 1...Sxg6
        • 2.Qc8#
      • 1...exd6
        • 2.Qxd6#
      • 1...Bc4
        • 2.Sxc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Bb5
        • 2.Rxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE,P_SPINS(b)::R(A),XS(b)
    • P(g);OGATE,XS(H)::QAR1(D),XP(g)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(D),XP(g)
      • Refutation
        • S(c);XP(J)
    • Try
      • S(H);
      • Threat
        • QAR1(D),XP(g)
      • Vars
        • K(f);P-FLIGHT,P_SPINS(c)::QAR2(D),XP(g)
        • S(c);XP(J)::B(B)+S(G),DCHECK
      • Refutation
        • B(d);XP(I)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+S(H)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(c)::S(H)
      • B(a);OGATE,P_SPINS(b),XQ(D)::R(A),XS(b)
      • S(b);P_SPINB(a),P_SPINS(b),XS(G)::QAR(D)+S(H)
      • S(c);P_SPINS(c),XS(G)::QAR(D)+S(H)
      • S(c);XP(J)::QAB(D)
      • P(g);OGATE,P_SPINP(g),XS(H)::QAR1(D),XP(g)
      • B(a);P_SPINS(b)::QAR(D)+S(H),XB(a)
      • S(b);P_SPINB(a)::QAR(D)+S(H),XS(b)
      • B(a);OGATE,P_SPINS(b)::R(A),XS(b)
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