MESON Chess Problem Database

Problem Display
PID: 157607 (3R2B1/1pNpb3/1Pk1qp2/1Rn2n2/P1N1p3/Bp3P2/4Q3/1K6 w - - 0 1)

Cristoffanini, Guido

L'Italia Scacchistica, 1925

3R2B1/1pNpb3/1Pk1qp2/1Rn2n2/P1N1p3/Bp3P2/4Q3/1K6

#2

11 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Bxd5#
    • 1...Qd6
      • 2.Sa5#
    • 1...Bd6
      • 2.Sa5#
    • 1...Bxd8
      • 2.Rxc5#
    • 1...Sd3
      • 2.Sa5#
    • 1...Sxa4
      • 2.Sa5#
    • 1...Sa6
      • 2.Sa5#
    • 1...Sd6
      • 2.Sa5#
      • 2.Rxc5#
    • 1...d5
      • 2.Sa5#
    • 1...d6
      • 2.Sa5#
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Bd5#
      • 1...Sxe6
        • 2.Sa5#
      • 1...dxe6
        • 2.Sa5#
      • 1...d5
        • 2.Sa5#
        • 2.Bxd5#
      • 1...Se3!
    • 1.Qxe4+?
      • 1...Qd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Sxe4
        • 2.Sa5#
      • 1...d5
        • 2.Sa5#
      • 1...Qxe4+!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sb4#
      • 1...Kxd5
        • 2.Qxe4#
      • 1...Qxd5
        • 2.Rc8#
      • 1...Sxa4
        • 2.Sa5#
      • 1...Sd3
        • 2.Sa5#
        • 2.Rc8#
      • 1...Sa6
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(f);OGATE::B(K),XQ(f)
    • Q(f);SBLOCK::S(F)
    • B(j);SBLOCK::S(F)
    • B(j);N_GUARD,XR(J)::R1(G),XS(c)
    • S(c);::S(F)
    • S(c);XP(E)::S(F)
    • P(i);::S(F)
  • Tries
    • Try
      • B(K);XQ(f)
      • Threat
        • B(K)
      • Vars
        • S(c);XB(K)::S(F)
        • P(i);XB(K)::S(F)
      • Refutation
        • S(d);
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • S(c);XQ(B)::S(F)
        • P(i);P_SPINP(i)::S(F)
      • Refutation
        • Q(f);CHECK,XQ(B)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(e);OGATEB,P_SPINP(i),P_SPINQ(f),P_SPINS(c),S_FLIGHT,XS(I)::QAB1(B),XP(b)
      • Q(f);XS(I)::R(J)
      • S(c);XP(E)::S(F)
      • S(c);::S(F)
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